Materials Science, Materials Chemistry, Electronic, Optical and Magnetic Materials, Renewable Energy, Sustainability and the Environment
60
Scopus Publications
2341
Scholar Citations
21
Scholar h-index
38
Scholar i10-index
Scopus Publications
Role of pH in the Pure Phase Formation of Barium Stannate Nanostructure Via Chemical Precipitation Route Shalu Sharma, Sandeep Chhoker EPJ Web of Conferences, 2026 Mobility of a TCO (transparent conducting oxide) depends on purity of phase, temperature and effective mass of charge carriers. Phase purity and operating temperature are the two controllable parameters to enhance the mobility. In this study firstly we have analyzed the role of pH on pure phase formation of BaSnO 3 by using two different bases NaOH and NH3. For this, the experiment is performed at various pH values i.e. from pH-8 to pH-11 using NH3. Secondly at pH -11 the chemical precipitation synthesis was performed by using Base NaOH and chlorides as precursor. It is observed that Pure phase formation of stannate nanostructure i.e. BaSnO 3 through Chemical precipitation is very much controlled by pH of the precursor solution. The pH affects the solubility of a compound and thus further decides the precipitation of desired hydroxides of metals. In this study pure phase formation was analyzed through XRD studies. It is evident through our studies that in chemical synthesis of BaSnO 3 , NaOH is better choice of base than NH 3 . Also, Barium Chloride is better precursor than Barium carbonate in synthesizing BaSnO 3 nanostructures. XRD study also revealed that while using Barium carbonate, SnO 2 phase appeared as impurity but when Barium chloride is used, no such impurity is observed. SEM studies revealed the micro rod like morphology of Barium stannate. The RT mobility of these Barium stannate microrods comes out to be 49 cm 2 /V-sec.
Broad photoluminescence and photocatalysis from functional carbonaceous material-metallized porphyrin composites for UV-Vis light harvesting Ambika Pathak, Sandeep Chhoker Physica Scripta, 2025 Current vivid study reports synthesis, optical studies of functional carbonaceous material (FCM) as well as broad range photoluminescence including synergistic effect of metallized porphyrin (as visible range light absorbing material) on photocatalysis carried under visible light irradiation. This high-order self-assembly of functional carbonaceous material possess extraordinary photophysical-chemical properties with its surface rich in functional groups (thus making it suitable for π-π * transitions) and further its composite formation with a high absorption coefficient (more than 20,000 in broad visible range 400–700 nm) and non-radiative fluorescence quenching exhibiting (near IR) metallized porphyrin. The structural, compositional characteristics of FCM and its composite including phase purity, types of functional groups, bonding arrangement is analysed like XRD, FESEM, EDX, FTIR, UV–vis, FL and Raman spectroscopy. The optical as well as structural properties (exhibiting suitable ID/IG ratio ∼ 1.4) of the pure as well as composite of FCM and porphyrin (band gap shifting from UV (4.2 eV) to visible (3.0 eV)) indicated the robust and versatile behaviour to be explored in applications such as photodetection and catalysis. In this article, we report the broad range photoluminescence for pure FCM (300–550 nm) as well as its porphyrin-based composite (400–550 nm) and further the application of composite in the photocatalytic ability for the degradation of standard methylene blue dye for degradation percentage of 62% in 120 min in visible light while 30% in 180 min in dark. Its cost effectiveness, biocompatibility, solution processability, stability and the most crucial, its appreciable results in minute resource utilization indicates its appropriateness as competitive photocatalyst in similar as well as modified schemes.
Photocatalytic activity of quaternary chalcogenide for methylene blue degradation Chandresh Kumari, Pankaj Sharma, Sandeep Chhoker Aip Conference Proceedings, 2024 Erbium-doped Selenium-based chalcogenide system has attracted attention due to the narrow band gap, and various applications in solar energy utilization, photocatalytic activity for the visible light response, and removal of hazardous pollutants. Researchers are attracted to photocatalytic studies because it is environmental friendly. Ge17Sb8Se75-xErx where x=0, 0.4%, 0.8% chalcogenide glass has been synthesized by traditional melt quenching technique. Further, morphological study and elemental composition have been done using FESEM and EDX. In this present study, photocatalytic activity for degradation of methylene blue dye under green light and UV-cut irradiation is investigated.
Light-Assisted AgMoS2 and PdMoS2 Hybrid Gas Sensors for Room-Temperature Detection of Ammonia Saurabh Rawat, Priyanka Bamola, Shreya Negi, Karishma, Chanchal Rani, Shivani Dangwal, Archana Mishra, Manika Khanuja, A. K. Yogi, Sandeep Chhoker, Mohit Sharma, Charu Dwivedi, Rajesh Kumar, Himani Sharma ACS Applied Nano Materials, 2024 Using hybrids and photon illumination together is an important step toward making high-performance gas sensors. Hybrid materials have their own properties that can improve the way gas sensors work, and photon illumination can make the sensor more sensitive. There is currently a lack of understanding regarding the impact of photoassisted gas sensing properties of hybrid materials, making it imperative that the connection between light photons and heterostructures for gas sensing materials be clarified. In this article, we design and develop a photoassisted molybdenum disulfide (MoS 2 ) based hybrid gas sensor with a low detection limit (10 ppm). Also, the mentioned sensor has robust antihumidity interference by incorporating the localized surface plasmon resonance (LSPR) effect using metal nanoparticles of Ag and Pd decorated over the MoS 2 nanoflowers. It has been discovered that the performance of sensing is enhanced when MoS 2 is modified with Ag and Pd nanoparticles of nearly 5 nm in diameter in conjunction with green light (533 nm). The AgMoS 2 displays a higher response value (76%) to 10 ppm of NH 3 at room temperature compared to the PdMoS 2 (43.7%) and bare MoS 2 (19.5%). This improvement in sensing response is a result of LSPR in AgMoS 2 hybrids and of the formation of a Schottky barrier in PdMoS 2 hybrids, as confirmed by UV–vis, X-ray photoelectron spectroscopy (XPS), and ultraviolet photoelectron spectroscopy (UPS) measurements. These findings open up a route for creating real-time gas detection sensors that can operate at lower temperatures.
Role Of pH In the Pure Phase Formation of Barium Stannate Nanostructure Via Chemical Precipitation Route S Sharma, S Chhoker EPJ Web of Conferences 356, 01031 , 2026 2026
Halogen stoichiometry tailoring of all inorganic double halide perovskite for photoelectrochemical hydrogen production applications A Pathak, N Kaur, P Singh, R Kumar, S Chhoker Journal of Molecular Structure, 144378 , 2025 2025
2D MXene/g-C3N4 engineered carboxymethyl cellulose film for improved dielectric behavior and as a suitable proton exchange membrane A Pathak, S Chhoker Materials Today Communications 46, 112851 , 2025 2025 Citations: 2
Interfacial Engineering of Z-Scheme-Based 2D/1D -WS 2 /TiO 2 Heterostructures: Enhanced Hydrogen Evolution Reaction and Fabrication of Facile … S Dangwal, S Rawat, C Dwivedi, GK Dalapati, S Ramakrishna, M Sharma, ... ACS Applied Energy Materials 8 (9), 5911-5924 , 2025 2025 Citations: 3
Structural, Morphological, and Optical Characteristics of RF Sputtered Silicon Nitride: Role of Film Thickness and Post‐Annealing Temperature K Chhoker, D Gupta, UK Dwivedi, R Singhal, S Aggarwal ChemistrySelect 10 (13), e202404474 , 2025 2025
Broad photoluminescence and photocatalysis from functional carbonaceous material-metallized porphyrin composites for UV-Vis light harvesting A Pathak, S Chhoker Physica Scripta 100 (1), 015905 , 2025 2025
Multi-pollutant degradation from 2D MoO3/g-C3N4/functional carbon nanomaterial based composite utilizing Z-scheme photocatalysis A Pathak, S Chhoker Ceramics International 50 (24), 52927-52940 , 2024 2024 Citations: 12
Thermal stability and crystallization kinetics of Er-doped Ge–Sb–Se chalcogenide: a DSC study C Kumari, S Chhoker, P Sharma Applied Physics A 130 (3), 164 , 2024 2024 Citations: 7
Photocatalytic activity of quaternary chalcogenide for methylene blue degradation C Kumari, P Sharma, S Chhoker AIP Conference Proceedings 2995 (1), 020066 , 2024 2024 Citations: 2
Light-Assisted AgMoS 2 and PdMoS 2 Hybrid Gas Sensors for Room-Temperature Detection of Ammonia S Rawat, P Bamola, S Negi, Karishma, C Rani, S Dangwal, A Mishra, ... ACS Applied Nano Materials 7 (1), 746-755 , 2023 2023 Citations: 6
Multifunctional electrochromic hybrid PANI@ WO3 core-shell for energy generation and storage T Ghosh, L Bansal, S Kandpal, C Rani, DK Rath, B Sahu, S Chhoker, ... Journal of Energy Storage 72, 108640 , 2023 2023 Citations: 31
Enhanced Photocatalytic Activity in 2D‐1D WS 2 /TiO 2 and 2D‐2D MoS 2 /WS 2 Heterosystems D Aswal, P Bamola, C Rani, S Rawat, A Bhatt, S Chhoker, M Sharma, ... ChemistrySelect 8 (34), e202204998 , 2023 2023 Citations: 9
Optical studies of carbon nano dots based composites for waste water remedy A Pathak, S Chhoker Materials Today: Proceedings , 2023 2023
Effect of rare earth dopant on the ac conductivity and dielectric study of GeSbSe chalcogenides glasses C Kumari, S Chhoker, P Sharma Journal of Non-Crystalline Solids 616 (616(2023)), 122439 , 2023 2023 Citations: 20
Electrical and photoluminescence studies of GeSbSeEr chalcogenide films C Kumari, P Sharma, S Chhoker Materials Today: Proceedings , 2023 2023 Citations: 3
Mescoporous nickel titanate–titanium oxide complex material for enhanced energy storage application L Bansal, C Rani, T Ghosh, S Kandpal, S Chhoker, M Tanwar, R Kumar The Journal of Physical Chemistry C 127 (19), 8925-8936 , 2023 2023 Citations: 15
Electrochemical studies of halide perovskite and its correlation for photocatalytic applications A Pathak, S Chhoker, P Singh, H Sharma, R Kumar Solid State Sciences 139, 107159 , 2023 2023 Citations: 15
Fluorane sensitive supercapacitive microcrystalline MoO 3: dual application in energy storage and HF detection L Bansal, T Ghosh, S Kandpal, C Rani, B Sahu, DK Rath, C Wesemann, ... Materials Advances 4 (20), 4775-4783 , 2023 2023 Citations: 8
Structural Morphological And Band Gap Studies Of Al doping In BaSnO3 S Sharma, S Chhoker Materials Today: Proceedings , 2023 2023
Results in Surfaces and Interfaces P Kumari, A Kumar ADVANCED OXIDATION PROCESS: A remediation technique for organic and non … , 2023 2023 Citations: 2
MOST CITED SCHOLAR PUBLICATIONS
Structural, magnetic, dielectric and optical properties of nickel ferrite nanoparticles synthesized by co-precipitation method S Joshi, M Kumar, S Chhoker, G Srivastava, M Jewariya, VN Singh Journal of Molecular structure 1076, 55-62 , 2014 2014 Citations: 472
Multiferroic, magnetoelectric and optical properties of Mn doped BiFeO3 nanoparticles S Chauhan, M Kumar, S Chhoker, SC Katyal, H Singh, M Jewariya, ... Solid State Communications 152 (6), 525-529 , 2012 2012 Citations: 198
Structural, vibrational, optical, magnetic and dielectric properties of Bi1− xBaxFeO3 nanoparticles S Chauhan, M Arora, PC Sati, S Chhoker, SC Katyal, M Kumar Ceramics International 39 (6), 6399-6405 , 2013 2013 Citations: 134
Structural, magnetic, and optical properties of Pr and Zr codoped BiFeO3 multiferroic ceramics P Chandra Sati, M Arora, S Chauhan, S Chhoker, M Kumar Journal of Applied Physics 112 (9) , 2012 2012 Citations: 133
Effect of Dy substitution on structural, magnetic and optical properties of BiFeO3 ceramics PC Sati, M Arora, S Chauhan, M Kumar, S Chhoker Journal of Physics and Chemistry of Solids 75 (1), 105-108 , 2014 2014 Citations: 117
Effect of Gd3+ substitution on structural, magnetic, dielectric and optical properties of nanocrystalline CoFe2O4 S Joshi, M Kumar, S Chhoker, A Kumar, M Singh Journal of Magnetism and Magnetic Materials 426, 252-263 , 2017 2017 Citations: 116
Substitution driven structural and magnetic transformation in Ca-doped BiFeO 3 nanoparticles S Chauhan, M Kumar, S Chhoker, SC Katyal, M Singh RSC advances 6 (49), 43080-43090 , 2016 2016 Citations: 107
Influence of Eu substitution on structural, magnetic, optical and dielectric properties of BiFeO3 multiferroic ceramics PC Sati, M Kumar, S Chhoker, M Jewariya Ceramics International 41 (2), 2389-2398 , 2015 2015 Citations: 84
Structural, vibrational, optical and magnetic properties of sol–gel derived Nd doped ZnO nanoparticles S Chauhan, M Kumar, S Chhoker, SC Katyal, VPS Awana Journal of Materials Science: Materials in Electronics 24 (12), 5102-5110 , 2013 2013 Citations: 82
Structural, magnetic, vibrational and impedance properties of Pr and Ti codoped BiFeO3 multiferroic ceramics PC Sati, M Arora, S Chauhan, M Kumar, S Chhoker Ceramics International 40 (6), 7805-7816 , 2014 2014 Citations: 81
Structural, Optical and Multiferroic Properties of BiFeO 3 Nanoparticles Synthesized by Soft Chemical Route M Arora, PC Sati, S Chauhan, S Chhoker, AK Panwar, M Kumar Journal of superconductivity and novel magnetism 26 (2), 443-448 , 2013 2013 Citations: 78
Low temperature ferromagnetic ordering and dielectric properties of Bi1-xDyxFeO3 ceramics PC Sati, M Kumar, S Chhoker Ceramics International 41 (2), 3227-3236 , 2015 2015 Citations: 66
A comparative study on structural, vibrational, dielectric and magnetic properties of microcrystalline BiFeO3, nanocrystalline BiFeO3 and core–shell structured BiFeO3@ SiO2 … S Chauhan, M Kumar, S Chhoker, SC Katyal Journal of Alloys and Compounds 666, 454-467 , 2016 2016 Citations: 64
Electron spin resonance studies and improved magnetic properties of Gd substituted BiFeO3 ceramics M Kumar, PC Sati, S Chhoker, V Sajal Ceramics International 41 (1), 777-786 , 2015 2015 Citations: 40
Structural, magnetic and optical properties of Bi1− xDyxFeO3 nanoparticles synthesized by sol–gel method M Arora, PC Sati, S Chauhan, H Singh, KL Yadav, S Chhoker, M Kumar Materials Letters 96, 71-73 , 2013 2013 Citations: 37
Evidence of spin-two phonon coupling and improved multiferroic behavior of Bi1− xDyxFeO3 nanoparticles M Arora, S Chauhan, PC Sati, M Kumar, S Chhoker Ceramics International 40 (8), 13347-13356 , 2014 2014 Citations: 33
Phase Evolution, Magnetic, Optical, and Dielectric Properties of Zr‐Substituted Bi 0.9 Gd 0.1 FeO 3 Multiferroics PC Sati, M Kumar, S Chhoker Journal of the American Ceramic Society 98 (6), 1884-1890 , 2015 2015 Citations: 32
Multifunctional electrochromic hybrid PANI@ WO3 core-shell for energy generation and storage T Ghosh, L Bansal, S Kandpal, C Rani, DK Rath, B Sahu, S Chhoker, ... Journal of Energy Storage 72, 108640 , 2023 2023 Citations: 31
Structural modification and enhanced magnetic properties with two phonon modes in Ca–Co codoped BiFeO3 nanoparticles S Chauhan, M Kumar, S Chhoker, SC Katyal, M Jewariya, BN Suma, ... Ceramics International 41 (10), 14306-14314 , 2015 2015 Citations: 24
Electron spin resonance study and improved magnetic and dielectric properties of Gd–Ti co-substituted BiFeO 3 ceramics M Kumar, PC Sati, S Chhoker Journal of Materials Science: Materials in Electronics 25 (12), 5366-5374 , 2014 2014 Citations: 23
