Gardenia de Sousa Pinheiro

@ufpi.br

Physics Department
Universidade Federal do Piauí

RESEARCH, TEACHING, or OTHER INTERESTS

Condensed Matter Physics, Atomic and Molecular Physics, and Optics, General Physics and Astronomy
42

Scopus Publications

1018

Scholar Citations

22

Scholar h-index

36

Scholar i10-index

Scopus Publications

  • Influence of pH on the properties of tungsten trioxide synthesized by the hydrothermal method
    Daniel C. Costa, Caique D.A. Lima, Marcelo E.H.M. Costa, Cleânio L. Lima, Italo Alefi Lima dos Santos, Gardênia de Sousa Pinheiro, Rodrigo Prioli Menezes, Carlos Alberto Senna, Suellen D.T. Barros, Guilherme C. Concas, Bruno G. Silva, Rubem L. Sommer, Jefferson F.D.F. Araújo
    Solid State Sciences, 2026
    Tungsten trioxide (WO 3 ) is a semiconductor oxide that has attracted scientific interest due to its structural versatility and functional properties, making it a promising material for various applications, such as photocatalysis. However, these properties strongly depend on the synthesis conditions, which determine the crystalline phase, morphology, and the presence of structural defects, such as oxygen vacancies. In this context, this work aims to investigate the influence of pH on the structural and physical properties of WO 3 . The results reveal that pH is a critical parameter in the formation of different crystalline phases of WO 3 , including hexagonal and orthorhombic structures, as confirmed by X-ray diffraction and electron microscopy analyses. Raman spectroscopy and Fourier Transform Infrared Spectroscopy corroborate these findings by highlighting characteristic vibrational modes and band shifts, indicating pH-induced structural changes. Magnetic measurements reveal a systematic evolution from purely diamagnetic behavior at low pH to a weak ferromagnetic-like response at higher pH values, characterized by a small hysteresis loop superimposed on a dominant diamagnetic background. These results highlight pH as a key parameter for tailoring the phase composition, defect landscape, and defect-induced magnetic response of WO 3 structures.
  • In situ investigation of structural stability and reversible conformational changes in Gd2(WO4)3 at high temperatures
    Jailson dos Santos Silva, Antonio Werbeson Miranda, Italo Alefi Lima dos Santos, Ediomar Costa Serra, João Victor Barbosa Moura, Alan Silva de Menezes, Paulo de Tarso Cavalcante Freire, Gardênia de Sousa Pinheiro, Cleânio da Luz Lima
    Journal of Molecular Structure, 2026
    • In situ PXRD reveals anisotropic thermal expansion along the b and c axes • In situ Raman detects reversible local conformational changes near 523 K • Combined PXRD-Raman analysis links long-range stability to local vibrational dynamics In this work, Gd 2 (WO 4 ) 3 samples were synthesized by the hydrothermal method and subsequently calcined at 923 K, being characterized at room temperature by X-ray diffraction, UV-Vis spectrophotometry and Raman spectroscopy, in addition to in situ PXRD and Raman measurements under variable temperature conditions. Rietveld refinement confirmed the exclusive formation of the monoclinic phase (space group C2/c ). The in situ PXRD analyses, performed between 298 K and 773 K, revealed high long-range structural stability, evidenced by anisotropic thermal expansion that is more pronounced along the b (11.9(4) × 10 -6 K -1 ) and c (10.3(4) × 10 -6 K -1 ) axes than the a (2.2(6) × 10 -6 K -1 ) axis. The b/c ratio exhibited a non-linear trend: a continuous increase followed by an abrupt decrease around 523 K during both heating and cooling cycles, suggesting a subtle conformational modification within the crystal lattice. Consistently, in situ Raman spectroscopy indicated reversible local changes in the same temperature range (538 K), variation in intensity, as well as, shifts of vibrational modes associated with WO 4 2- tetrahedra. These effects were attributed to enhanced phonon-phonon anharmonicity and rearrangements of GdO 8 polyhedra. The results demonstrate that although the global structure of Gd 2 (WO 4 ) 3 remains monoclinic throughout the investigated temperature range, reversible local reorganizations occur, revealing an intrinsic thermal sensitivity of the lattice and supporting its potential use in thermally stable photonic and optoelectronic applications, such as Raman-based temperature sensors, high-temperature optical components, and rare-earth-doped laser host materials.
  • Temperature–dependent phase behavior and thermal stability of bismuth-doped tungsten trioxide nanowires
    Antonio Werbeson Miranda, Caique Diego de Abreu Lima, João Victor Barbosa Moura, Alan Silva de Menezes, Clenilton Costa dos Santos, Emerson da Silva do Nascimento, Moisés das Virgens Santana, José Ferreira da Silva Júnior, Paulo de Tarso Cavalcante Freire, Gardênia de Sousa Pinheiro, Cleânio da Luz Lima
    Solid State Communications, 2025
  • Surface Sensitivity of Mesoporous Carbon-Supported Iron Catalysts in the Fischer–Tropsch Synthesis: An In Situ XPS Site Evolution at Distinct Reaction Conditions
    João Pedro S. Nascimento, Alcineia C. Oliveira, Fabiano A.N. Fernandes, Gardênia S Pinheiro, Juan Pedro Holgado, Alfonso Caballero Martinez, Olga Guerrero-Pérez, José Jiménez-Jiménez, E. Rodríguez-Castellón
    Energy and Fuels, 2025
    The Fischer–Tropsch process can be considered as an alternative route to convert fossil fuels such as crude oil, coal, and methane for the production of more environmentally friendly liquid fuels and chemicals. As recoverable sources of carbon, Fischer–Tropsch synthesis (FTS) converts a mixture of CO and H2 to a range of hydrocarbons, which is free of sulfur and nitrogen and low in aromatics. The surface-sensitive investigation of the temperature and pressure effects on the FT synthesis performance over mesoporous carbon-supported iron catalysts was examined by in situ X-ray photoelectron spectroscopy analyses. Raman and Mössbauer spectroscopy measurements illustrated the structural properties of mesoporous Fe-based oxides. Under FTS reaction conditions of 20 and 30 atm, and temperatures of 240, 255, and 270 °C with a CO-to- H2 ratio of 1, the solids were active with 38–45% of CO conversion and a rate of 1 × 10–5 molCO·g–1·s–1. The product distribution gave C1–C4, C5–C9, and C10+ products with the structure of the solid marginally affected by the type of product obtained. The in situ surface XPS analyses were conducted at ∼240–270 °C and 10 atm with a CO-to-H2 ratio of 1 for 1 h. The α-Fe2O3 phase was reduced to Fe3O4 resulting in well-dispersed magnetite nanoparticles with further reduction to metallic iron on the mesoporous carbon support. Such α-Fe phase demonstrated accessibility of the syngas resulting in the activity of the solids. The chemical evolution of the Fe 2p, O 1s, C 1s, and K 2s core levels during the FTS with increasing the temperature up to 255 °C suggested that the surface carburization formed χ-Fe5C2 and θ-Fe3C iron carbide phases along with Fe3O4 and, tentatively, the metallic iron phase. The mesoporous carbon-supported iron catalysts having χ-Fe5C2 carbide determined the activity and stability during the FTS synthesis.
  • Effects of defective nanostructured alumina supports on the syngas production by tri-reforming of methane
    Gabriela M. Bertoldo, Alcineia C. Oliveira, Gilberto D. Saraiva, Gardenia S. Pinheiro, Rossano Lang, Elisabete M. Assaf, Alessandra Lucredio, Daniel Ballesteros-Plata, Enrique Rodríguez-Castellón
    Catalysis Today, 2025
  • Preparation and Application of Sodium-Lanthanum Molybdate for the Photocatalytic Degradation of Coomassie Brilliant Blue G-250 Dye
    Caique D. A. Lima, Joyce A. Borges, Italo A. L. Santos, Angel A. Hidalgo, Josy A. Osajima, Adriel da Silva Almeida, Thiago M. B. F. Oliveira, Jefferson F. D. F. Araujo, Suellen D. T. de Barros, Marcelo E. H. Maia da Costa, Diego A. B. Barbosa, João V. B. Moura, Gardênia S. Pinheiro, Cleânio L. Lima
    ACS Omega, 2025
    High Resolution Image Download MS PowerPoint Slide This study reports on the synthesis, characterization, and application of sodium–lanthanum molybdate [NaLa(MoO 4 ) 2 ] as a photocatalyst in the degradation process of Coomassie Brilliant Blue G-250 (CBB-250), an environmentally toxic and recalcitrant dye derived from triphenylmethane. The highlighted ceramic material was produced by coprecipitation, and its properties were studied using a range of physicochemical techniques including compositional, crystallographic, and morphological analyses. Among the most relevant information, X-ray diffraction (XRD), Raman spectroscopy, and Fourier transform infrared (FTIR) spectroscopy confirmed the formation of NaLa (MoO 4 ) 2 crystals with a tetragonal arrangement. Additionally, the scanning electron microscope (SEM) images provide evidence of the production of overlapping plate-like microstructures. The nitrogen adsorption isotherms demonstrated that the molybdate obtained exhibits mesoporous organization, with a surface area and pore diameter equivalent to 45.7 m 2 g –1 and 6.54 nm, respectively. Photocatalytic tests, performed under ultraviolet light irradiation for 120 min, indicated that NaLa(MoO 4 ) 2 has high oxidative reactivity, achieving a degradation of >95% of the CBB-250 dye present in the system. The reaction velocity constants, estimated in accordance with the Langmuir–Hinshelwood equation, substantiate that NaLa(MoO 4 ) 2 enhances the reaction kinetics (13.7 × 10 –3 min –1 ) throughout the photochemical treatment. In light of the growing scientific interest in effective strategies for the removal of emerging pollutants from contamination matrices, NaLa(MoO 4 ) 2 represents a promising avenue for the development of innovative technologies in this field.
  • Magnetic transition in MoO3: Influence of Mo5+/Mo6+ ratios on paramagnetic to diamagnetic behavior
    Caique D.A. Lima, Thais C.V. de Carvalho, Cesar D. Mendoza, Marcelo E.H. Maia da Costa, Gardênia de S. Pinheiro, Cleânio Luz-Lima, Bruno G. Silva, Rubem L. Sommer, Jefferson F.D. F. Araujo
    Solid State Sciences, 2025
    This study examines the transition from paramagnetic to diamagnetic response in MoO 3 , a phenomenon previously documented in the literature where the magnetic response of MoO 3 varies with the applied field, changing from paramagnetic at low fields to diamagnetic at high fields. MoO 3 samples were synthesized with controlled Mo 6+ /Mo 5+ ratios while maintaining high crystallinity to elucidate this phenomenon. The samples were prepared in a chemical vapor deposition (CVD) furnace under an oxygen environment at two different temperatures, 550 and 650 °C, and two annealing times, 4 and 8 h. The resulting samples were subjected to characterization using powder X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and vibrating sample magnetometry (VSM). The XRD results demonstrated the formation of highly crystalline MoO 3 in all samples, which is confirmed by Raman and FTIR. The XPS results demonstrate the concentration of Mo 5+ and Mo 6+ present in each sample. The results of the VSM experiments demonstrated that the observed change in the magnetic response of MoO 3 is due to the intensity of the material's response being comparable to that of the sample holder's response. Moreover, vibrating sample magnetometry and X-ray photoelectron spectroscopy analysis revealed that MoO 3 can exhibit both paramagnetic and diamagnetic behavior, depending on the quantity of Mo 5+ present in the sample. • The study explores the paramagnetic-to-diamagnetic transition in MoO3 influenced by applied magnetic fields and Mo6+/Mo5+ ratios. • MoO3 samples with controlled Mo6+/Mo5+ ratios were synthesized via thermal decomposition of ammonium heptamolybdate under varying conditions. • Characterization confirmed high crystallinity and quantified Mo5+/Mo6+ concentrations. • Magnetic behavior transitions were linked to Mo5+ content of the sample.
  • Investigation of Mn2+-Doped Stearic-Acid Through XRD, Raman, and FT-IR, and Thermal Studies
    Rodrigo M. Rocha, Marinaldo V. de Souza Junior, Luiz F. L. Silva, Paulo T. C. Freire, Gardênia S. Pinheiro, Waldomiro Paschoal, Francisco F. de Sousa, Sanclayton G. C. Moreira
    Quantum Beam Science, 2025
    In this research, we investigated the influence of Mn2+ ions on the packing in stearic acid (SA) crystals through the use of Raman spectroscopy, X-ray diffraction (XRD), and Fourier transform infrared (FT-IR) spectroscopy. The crystals investigated were obtained utilizing the slow evaporation methodology in a hexane solution under varying manganese (Mn) concentrations sourced from MnSO4 5H2O (0.5, 1.0, 1.5, 2.0, 4.0, and 6.0%). XRD studies indicated that all SA crystals were grown in the Bm form (monoclinic), favoring the gauche conformation in molecular packing. Additionally, crystalline lattice modifications were observed through Raman spectral changes in the low-vibrational energy region. Variations in the intensities and Raman shifts in two lattice vibrational modes, centered at approximately 59 and 70 cm−1, revealed that two types of hydrogen bonds are distinctly affected within the crystalline lattice. Furthermore, the unit cell parameters (a, b, c, and β) were determined via Rietveld refinement, and their behavior was analyzed as a function of Mn concentration. The results indicated that Mn2+ ions exert a strain and deformation effect on the unit cell. Lastly, differential scanning calorimetry (DSC) was employed to evaluate the thermal stability of the Bm form of SA crystals.
  • Theoretical and experimental study of the optoelectronic, thermodynamic and vibrational properties of the nanostructure of m-WO3
    Ricardo Gomes, Gardênia de Sousa Pinheiro, Ediomar Costa Serra, Edvan Moreira, Sâmia Dantas Braga, David L. Azevedo, Cleanio da Luz Lima
    Ceramics International, 2024
  • High-temperature Raman spectra of dipeptide α-L-aspartyl-L-alanine crystal
    R.F. Silva, C. Luz-Lima, P.T.C. Freire, F.E.A. Melo, G.S. Pinheiro
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, 2023
  • Synthesis, characterization, and thermal stability study of sodium and sodium–aluminum titanate nanotubes
    Caique Diego de Abreu Lima, Roniel dos Santos Sousa, Antonio Werbeson Miranda, João Victor Barbosa Moura, Gardênia de Sousa Pinheiro, Bartolomeu Cruz Viana, Iara Souza Lima, Thiago Mielle Brito Ferreira Oliveira, Oswaldo Baffa, Jefferson Ferraz Damasceno Felix Araujo, Cleânio da Luz Lima
    Solid State Sciences, 2023
  • Investigation of the Deactivation Behavior of MeMo/La2O3-Al2O3- and MeMo/Nb2O5 Supported Catalysts (Me = Pt, Ni, and Co) in Tri-Reforming of Methane
    João P. Nascimento, Rita de Cássia F. Bezerra, Elisabete M. Assaf, Alessandra F. Lucredio, Rinaldo S. Araujo, Gilberto D. Saraiva, E. Rodríguez-Castellón, E. Rodríguez-Aguado, Gardenia S. Pinheiro, Alcineia C. Oliveira
    Energy and Fuels, 2023
  • Polymorphism at hexadecanoic-acid crystals investigated through structural and vibrational studies
    D.C. Abreu, P.F. Façanha Filho, G.S. Pinheiro, P.T.C. Freire, S.G.C. Moreira, A.O. dos Santos, F.F. de Sousa
    Vibrational Spectroscopy, 2022
  • Co-doped α-MoO3 hierarchical microrods: Synthesis, structure and phonon properties
    Caique D.A. Lima, João V.B. Moura, Gardênia S. Pinheiro, Jefferson F.D.F. Araujo, Suziete B.S. Gusmão, Bartolomeu C. Viana, Paulo T.C. Freire, Cleânio Luz-Lima
    Ceramics International, 2021
  • Effect of Fe (III) on L-asparagine monohydrate investigated under low- and high-temperature conditions
    E.J. Gomes, J.A. Lima, P.T.C. Freire, G.S. Pinheiro, F.F. de Sousa, C.M.R. Remédios
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, 2020
  • Strain and Piezo-Doping Mismatch between Graphene Layers
    Alexis Forestier, Félix Balima, Colin Bousige, Gardênia de Sousa Pinheiro, Rémy Fulcrand, Martin Kalbáč, Denis Machon, Alfonso San-Miguel
    Journal of Physical Chemistry C, 2020
  • High-pressure studies on L,L-dileucine crystals by Raman spectroscopy and synchrotron X-ray diffraction combined with DFT calculations
    C.B. Silva, J.G. da Silva Filho, G.S. Pinheiro, A.M.R. Teixeira, F.F. de Sousa, P.T.C. Freire
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, 2020
  • Low-temperature induced phase transitions in BaWO4:Er3+ microcrystals: A Raman scattering study
    I.P. Carvalho, R.B. Sousa, J.M.E. Matos, J.V.B. Moura, P.T.C. Freire, G.S. Pinheiro, C. Luz-Lima
    Journal of Molecular Structure, 2020
  • Low-Temperature Phase Transition of Dodecanoic Acid Crystals: A Study Using Raman, Powder X-ray Diffraction, and Density Functional Theory Calculations
    Gislayllson D. Santos Souza, Ana M. Amado, Alexandre M. R. Teixeira, Paulo T. C. Freire, Gilberto D. Saraiva, Gardênia S. Pinheiro, Sanclayton G. C. Moreira, Francisco F. de Sousa, Carlos E. S. Nogueira
    Crystal Growth and Design, 2020
  • Temperature-induced isostructural phase transition on NaCe(MoO4)2 system: A Raman scattering study
    J.V.B. Moura, C. Luz-Lima, G.S. Pinheiro, P.T.C. Freire
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, 2019
  • Phase transformation in the C form of myristic-acid crystals and DFT calculations
    J.R.S. Miranda, A.J.R. de Castro, J.G. da Silva Filho, P.T.C. Freire, G.S. Pinheiro, S.G.C. Moreira, G.D. Saraiva, F.F. de Sousa
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, 2019
  • Understanding the effect of solvent polarity on the polymorphism of octadecanoic acid through spectroscopic techniques and DFT calculations
    Luiz F. Lobato Silva, Waldomiro Paschoal, Gardênia S. Pinheiro, José G. da Silva Filho, Paulo T. C. Freire, Francisco F. de Sousa, Sanclayton G. C. Moreira
    Crystengcomm, 2019
  • Vibrational and structural properties of L-Alanyl-L-Phenylalanine dipeptide by Raman spectroscopy, infrared and DFT calculations
    C.B. Silva, J.G. da Silva Filho, G.S. Pinheiro, A.M.R. Teixeira, P.T.C. Freire
    Vibrational Spectroscopy, 2018
  • Vibrational properties of L-cysteine hydrochloride monohydrate crystal under high-pressure
    J.F. Silva Junior, G.D.S. Souza, C.L. Lima, P.T.C. Freire, G.S. Pinheiro
    Vibrational Spectroscopy, 2018
  • Synthesis, characterizations, and antibacterial properties of PbMoO4 nanocrystals
    J.V.B. Moura, T.S. Freitas, A.R.P. Silva, A.T.L. Santos, J.H. da Silva, R.P. Cruz, R.L.S. Pereira, P.T.C. Freire, C. Luz-Lima, G.S. Pinheiro, H.D.M. Coutinho
    Arabian Journal of Chemistry, 2018
  • High-temperature Raman spectroscopy of L,L-diphenylalanine single-crystal
    J.G. da Silva Filho, F.E.A. Melo, J.A. Lima, G.S. Pinheiro, P.T.C. Freire
    Vibrational Spectroscopy, 2018
  • High-pressure Raman spectra and DFT calculations of L-tyrosine hydrochloride crystal
    C.A.A.S.S. dos Santos, J.O. Carvalho, J.G. da Silva Filho, J.L. Rodrigues, R.J.C. Lima, G.S. Pinheiro, P.T.C. Freire, P.F. Façanha Filho
    Physica B Condensed Matter, 2018
  • Raman scattering studies of graphene under high pressure
    Denis Machon, Colin Bousige, Rafael Alencar, Abraao Torres‐Dias, Félix Balima, Jimmy Nicolle, Gardênia de Sousa Pinheiro, Antonio Gomes Souza Filho, Alfonso San‐Miguel
    Journal of Raman Spectroscopy, 2018
  • NaCe(MoO4)2 microcrystals: Hydrothermal synthesis, characterization and photocatalytic performance
    J.V.B. Moura, G.S. Pinheiro, J.V. Silveira, P.T.C. Freire, B.C. Viana, C. Luz-Lima
    Journal of Physics and Chemistry of Solids, 2017
  • Raman spectroscopy of γ-aminobutyric acid under high pressure
    C.M. da Silva, J.G. Silva Filho, G.S. Pinheiro, R.C. Vilela, F.E.A. Melo, J.A. Lima, P.T.C. Freire
    Vibrational Spectroscopy, 2017
  • Low-temperature Raman spectra of the 2-(α-methylbenzylamino)-5-nitropyridine crystal
    G.S. Pinheiro, M.N.G. Ferreira Júnior, A.O. dos Santos, P.T.C. Freire, J.A. Lima Jr, C.E.S. Nogueira, L.P. Cardoso, J.N. Sherwood, C.M.R. Remédios
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, 2017
  • Biaxial strain transfer in supported graphene
    C. Bousige, F. Balima, D. Machon, G. S. Pinheiro, A. Torres-Dias, J. Nicolle, D. Kalita, N. Bendiab, L. Marty, V. Bouchiat, G. Montagnac, A. G. Souza Filho, P. Poncharal, A. San-Miguel
    Nano Letters, 2017
  • α-L-Glutamic acid under high pressure: Phase transitions studied by Raman spectroscopy
    C. Luz-Lima, J.A. Borges, J.V.B. Moura, G.S. Pinheiro, B.C. Viana, J. Mendes-Filho, P.T.C. Freire
    Vibrational Spectroscopy, 2016
  • Phonon properties of β-Ag2MoO4: Raman spectroscopy and ab initio calculations
    J.V.B. Moura, J.G. da Silva Filho, P.T.C. Freire, C. Luz-Lima, G.S. Pinheiro, B.C. Viana, J. Mendes Filho, A.G. Souza-Filho, G.D. Saraiva
    Vibrational Spectroscopy, 2016
  • Temperature- and power-dependent phonon properties of suspended continuous WS2 monolayer films
    Anderson G. Vieira, Cleanio Luz-Lima, Gardenia S. Pinheiro, Zhong Lin, Julio A. Rodríguez-Manzo, Nestor Perea-López, Ana Laura Elías, Marija Drndić, Mauricio Terrones, Humberto Terrones, Bartolomeu C. Viana
    Vibrational Spectroscopy, 2016
  • The temperature-dependent single-crystal Raman spectroscopy of a model dipeptide: L-Alanyl-L-alanine
    J.G. Silva, L.M. Arruda, G.S. Pinheiro, C.L. Lima, F.E.A. Melo, A.P. Ayala, J. Mendes Filho, P.T.C. Freire
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, 2015
  • Low-temperature phase transformation studies in the stearic acid: C form
    F.F. de Sousa, P.T.C. Freire, A.S. de Menezes, G.S. Pinheiro, L.P. Cardoso, P. Alcantara, S.G.C. Moreira, F.E.A. Melo, J. Mendes Filho, G.D. Saraiva
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, 2015
  • Pressure-induced phase transitions in acentric BaHf(BO3)2
    Mirosław Mączka, Katarzyna Szymborska-Małek, Gardenia de Sousa Pinheiro, Paulo Tarso Cavalcante Freire, Andrzej Majchrowski
    Journal of Solid State Chemistry, 2015
  • Leads from physical, chemical, and thermal characterization on cytotoxic effects of xylan-based microparticles
    Henrique Marcelino, Acarília Da Silva, Monique Gomes, Elquio Oliveira, Toshiyuki Nagashima-Junior, Gardênia Pinheiro, Acarízia Da Silva, Ana Timoteo, Lucymara Agnez-Lima, Alejandro Ayala, Anselmo Oliveira, Eryvaldo Do Egito
    Polymers, 2015
  • Metal oxides nanoparticles from complexes on SBA-15 for glycerol conversion
    Francisco F. de Sousa, Alcemira C. Oliveira, Josué M. Filho, Gardenia S. Pinheiro, Marcus Giotto, Natanael A. Barros, Helvio S.A. Souza, Alcineia C. Oliveira
    Chemical Engineering Journal, 2013
  • Synthesis, characterization and catalytic performance of metal-containing mesoporous carbons for styrene production
    Cleanio L. Lima, Othon S. Campos, Alcemira C. Oliveira, Francisco F. de Sousa, Josué M. Filho, Pedro L. Neto, Adriana N. Correia, Gabriel Q. Sabadia, Izabel M. Nogueira, Gardenia S. Pinheiro, Alcineia C. Oliveira
    Applied Catalysis A General, 2011
  • Raman and IR studies of BaBi2Ta2O9 prepared by a sol-gel process
    M. Ma̧czka, G. de Sousa Pinheiro, K. Hermanowicz, P. T. C. Freire, J. Hanuza
    Journal of Raman Spectroscopy, 2011

RECENT SCHOLAR PUBLICATIONS

  • Influence of pH on the properties of tungsten trioxide synthesized by the hydrothermal method
    DC Costa, CDA Lima, MEHM Costa, CL Lima, IAL dos Santos, ...
    Solid State Sciences, 108352 , 2026
    2026
  • In situ Investigation of Structural Stability and Reversible Conformational Changes in Gd2 (WO4) 3 at High Temperatures
    J dos Santos Silva, AW Miranda, IAL dos Santos, EC Serra, JVB Moura, ...
    Journal of Molecular Structure, 145948 , 2026
    2026
  • Elucidating the temperature-dependent structural and optoelectronic properties of Ag4V2O7 microhexagons
    AW Miranda, FF Sousa, TMBF Oliveira, ML Vega, C Luz-Lima, JS Silva, ...
    Journal of Molecular Structure, 145579 , 2026
    2026
    Citations: 1
  • High-temperature and laser-induced phase transitions in α-Ag3VO4 nanoparticles: A Raman and DFT study
    AW Miranda, FS Morais, E Moreira, JVB Moura, FF Sousa, DL Azevedo, ...
    Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 127376 , 2025
    2025
    Citations: 1
  • Óxidos de metais de transição do tipo MeOx porosos (Me= Cr, Mn, V e Ti) obtidos via nanomoldagem: desempenho catalítico na acetalização do glicerol
    Y Carvalho, A Martins, A Oliveira, G Pinheiro, L Olivier, J Junior
    23º CBCAT–Congresso Brasileiro de Catalise 1 (1) , 2025
    2025
  • Temperature–dependent phase behavior and thermal stability of bismuth-doped tungsten trioxide nanowires
    AW Miranda, CD de Abreu Lima, JVB Moura, AS de Menezes, ...
    Solid State Communications 403, 116010 , 2025
    2025
    Citations: 4
  • Surface Sensitivity of Mesoporous Carbon-Supported Iron Catalysts in the Fischer–Tropsch Synthesis: An In Situ XPS Site Evolution at Distinct Reaction Conditions
    JPS Nascimento, AC Oliveira, FAN Fernandes, GS Pinheiro, JP Holgado, ...
    Energy & Fuels 39 (33), 15634-15647 , 2025
    2025
    Citations: 2
  • Effects of defective nanostructured alumina supports on the syngas production by tri-reforming of methane
    GM Bertoldo, AC Oliveira, GD Saraiva, GS Pinheiro, R Lang, EM Assaf, ...
    Catalysis Today 454, 115280 , 2025
    2025
    Citations: 1
  • Preparation and Application of Sodium–Lanthanum Molybdate for the Photocatalytic Degradation of Coomassie Brilliant Blue G-250 Dye
    CDA Lima, JA Borges, IAL Santos, AA Hidalgo, JA Osajima, AS Almeida, ...
    ACS omega 10 (16), 16006-16014 , 2025
    2025
    Citations: 2
  • Magnetic transition in MoO3: Influence of Mo5+/Mo6+ ratios on paramagnetic to diamagnetic behavior
    CDA Lima, TCV de Carvalho, CD Mendoza, MEHM da Costa, ...
    Solid State Sciences 162, 107866 , 2025
    2025
    Citations: 14
  • Investigation of Mn 2+ -Doped Stearic-Acid Through XRD, Raman, and FT-IR, and Thermal Studies
    RM Rocha, MV de Souza Junior, LFL Silva, PTC Freire, GS Pinheiro, ...
    Quantum Beam Science 9 (1), 8 , 2025
    2025
    Citations: 3
  • Theoretical and experimental study of the optoelectronic, thermodynamic and vibrational properties of the nanostructure of m-WO3
    R Gomes, G de Sousa Pinheiro, EC Serra, E Moreira, SD Braga, ...
    Ceramics International 50 (5), 8141-8149 , 2024
    2024
    Citations: 14
  • High-temperature Raman spectra of dipeptide α-L-aspartyl-L-alanine crystal
    RF Silva, C Luz-Lima, PTC Freire, FEA Melo, GS Pinheiro
    Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 297, 122746 , 2023
    2023
    Citations: 3
  • Synthesis, characterization, and thermal stability study of sodium and sodium–aluminum titanate nanotubes
    CD de Abreu Lima, R dos Santos Sousa, AW Miranda, JVB Moura, ...
    Solid State Sciences 138, 107134 , 2023
    2023
    Citations: 12
  • Investigation of the Deactivation Behavior of MeMo/La 2 O 3 -Al 2 O 3 - and MeMo/Nb 2 O 5 Supported Catalysts (Me = Pt, Ni, and Co) in Tri-Reforming of Methane
    JP Nascimento, RCF Bezerra, EM Assaf, AF Lucredio, RS Araujo, ...
    Energy & Fuels 37 (5), 3836-3853 , 2023
    2023
    Citations: 10
  • Polymorphism at hexadecanoic-acid crystals investigated through structural and vibrational studies
    DC Abreu, PF Façanha Filho, GS Pinheiro, PTC Freire, SGC Moreira, ...
    Vibrational Spectroscopy 121, 103402 , 2022
    2022
    Citations: 6
  • Co-doped α-MoO3 hierarchical microrods: Synthesis, structure and phonon properties
    CDA Lima, JVB Moura, GS Pinheiro, JFDF Araujo, SBS Gusmão, ...
    Ceramics International 47 (19), 27778-27788 , 2021
    2021
    Citations: 50
  • Effect of Fe (III) on L-asparagine monohydrate investigated under low-and high-temperature conditions
    EJ Gomes, JA Lima Jr, PTC Freire, GS Pinheiro, FF de Sousa, ...
    Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 241, 118643 , 2020
    2020
    Citations: 8
  • Strain and piezo-doping mismatch between graphene layers
    A Forestier, F Balima, C Bousige, GS Pinheiro, R Fulcrand, M Kalbáč, ...
    The Journal of Physical Chemistry C 124 (20), 11193-11199 , 2020
    2020
    Citations: 24
  • High-pressure studies on l, l-dileucine crystals by Raman spectroscopy and synchrotron X-ray diffraction combined with DFT calculations
    CB Silva, JG da Silva Filho, GS Pinheiro, AMR Teixeira, FF de Sousa, ...
    Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 229, 117899 , 2020
    2020
    Citations: 15

MOST CITED SCHOLAR PUBLICATIONS

  • Biaxial Strain Transfer in Supported Graphene
    C Bousige, F Balima, D Machon, GS Pinheiro, A Torres Dias, J Nicolle, ...
    Nano Letters , 2017
    2017
    Citations: 68
  • Raman scattering studies of graphene under high pressure
    D Machon, C Bousige, R Alencar, A Torres‐Dias, F Balima, J Nicolle, ...
    Journal of Raman Spectroscopy 49 (1), 121-129 , 2018
    2018
    Citations: 62
  • Co-doped α-MoO3 hierarchical microrods: Synthesis, structure and phonon properties
    CDA Lima, JVB Moura, GS Pinheiro, JFDF Araujo, SBS Gusmão, ...
    Ceramics International 47 (19), 27778-27788 , 2021
    2021
    Citations: 50
  • Phonon properties of β-Ag2MoO4: Raman spectroscopy and ab initio calculations
    JVB Moura, JG da Silva Filho, PTC Freire, C Luz-Lima, GS Pinheiro, ...
    Vibrational Spectroscopy 86, 97-102 , 2016
    2016
    Citations: 41
  • High-pressure Raman spectra of L-isoleucine crystals
    AS Sabino, GP De Sousa, C Luz-Lima, PTC Freire, FEA Melo, ...
    Solid state communications 149 (37-38), 1553-1556 , 2009
    2009
    Citations: 41
  • Understanding the effect of solvent polarity on the polymorphism of octadecanoic acid through spectroscopic techniques and DFT calculations
    LFL Silva, W Paschoal, GS Pinheiro, JG da Silva Filho, PTC Freire, ...
    CrystEngComm 21 (2), 297-309 , 2019
    2019
    Citations: 39
  • High pressure Raman spectra of β-form of l-glutamic acid
    C Luz-Lima, GP De Sousa, JA Lima Jr, FEA Melo, J Mendes Filho, ...
    Vibrational Spectroscopy 58, 181-187 , 2012
    2012
    Citations: 38
  • Temperature-induced isostructural phase transition on NaCe (MoO4) 2 system: A Raman scattering study
    JVB Moura, C Luz-Lima, GS Pinheiro, PTC Freire
    Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 208, 229-235 , 2019
    2019
    Citations: 32
  • NaCe (MoO4) 2 microcrystals: Hydrothermal synthesis, characterization and photocatalytic performance
    JVB Moura, GS Pinheiro, JV Silveira, PTC Freire, BC Viana, C Luz-Lima
    Journal of Physics and Chemistry of Solids 111, 258-265 , 2017
    2017
    Citations: 32
  • Temperature-dependent Raman spectroscopy studies of phase transformations in the K2WO4 and the MgMoO4 crystals
    C Luz-Lima, JC Batista, PTC Freire, GP De Sousa, FEP Dos Santos, ...
    Vibrational Spectroscopy 65, 58-65 , 2013
    2013
    Citations: 32
  • Metal oxides nanoparticles from complexes on SBA-15 for glycerol conversion
    FF de Sousa, AC Oliveira, M Josué Filho, GS Pinheiro, M Giotto, ...
    Chemical engineering journal 228, 442-448 , 2013
    2013
    Citations: 31
  • Vibrational and structural properties of L-Alanyl-L-Phenylalanine dipeptide by Raman spectroscopy, infrared and DFT calculations
    CB Silva, JG da Silva Filho, GS Pinheiro, AMR Teixeira, PTC Freire
    Vibrational spectroscopy 98, 128-133 , 2018
    2018
    Citations: 30
  • Low-temperature phase transition of dodecanoic acid crystals: a study using Raman, powder X-ray diffraction, and density functional theory calculations
    GD Santos Souza, AM Amado, AMR Teixeira, PTC Freire, GD Saraiva, ...
    Crystal Growth & Design 20 (1), 281-290 , 2019
    2019
    Citations: 27
  • High-pressure Raman scattering on Fe2 (MoO4) 3 microcrystals obtained by a hydrothermal method
    JVB Moura, GS Pinheiro, PTC Freire, J Mendes Filho, GD Saraiva, ...
    Vibrational Spectroscopy 87, 88-93 , 2016
    2016
    Citations: 27
  • Low-temperature phase transformation studies in the stearic acid: C form
    FF De Sousa, PTC Freire, AS De Menezes, GS Pinheiro, LP Cardoso, ...
    Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 148, 280-288 , 2015
    2015
    Citations: 26
  • Strain and piezo-doping mismatch between graphene layers
    A Forestier, F Balima, C Bousige, GS Pinheiro, R Fulcrand, M Kalbáč, ...
    The Journal of Physical Chemistry C 124 (20), 11193-11199 , 2020
    2020
    Citations: 24
  • Low-Temperature Raman Spectra of l -Histidine Crystals
    GP De Sousa, PTC Freire, JM Filho, FEA Melo, CL Lima
    Brazilian Journal of Physics 43 (3), 137-144 , 2013
    2013
    Citations: 24
  • α-l-Glutamic acid under high pressure: phase transitions studied by Raman spectroscopy
    C Luz-Lima, JA Borges, JVB Moura, GS Pinheiro, BC Viana, ...
    Vibrational Spectroscopy 86, 343-349 , 2016
    2016
    Citations: 23
  • High-pressure Raman spectra of L-histidine hydrochloride monohydrate crystal
    GP De Sousa, PTC Freire, JA Lima Jr, J Mendes Filho, FEA Melo
    Vibrational Spectroscopy 57 (1), 102-107 , 2011
    2011
    Citations: 23
  • Low‐temperature Raman spectra of racemate DL ‐Alanine crystals
    JA Lima Jr, PTC Freire, FEA Melo, JM Filho, GP De Sousa, RJC Lima, ...
    Journal of Raman Spectroscopy 41 (7), 808-813 , 2010
    2010
    Citations: 23