Cocos nucifera mediated green synthesis and characterization of BiOCl-Fe2O3 nanocomposite for photocatalytic dye degradation and electrochemical sensing of dopamine A.S. Manjunatha, P.R. Prakruthi, J. Puneetha, M. Shashank, G. Nagaraju Sustainable Chemistry for the Environment, 2024 In this study, BiOCl-Fe2O3 nanocomposite was synthesized by mixing 1:1 ratio of pre-prepared BiOCl and Fe2O3 in 100 mL of H2O using Cocos nucifera (coconut milk) as a green fuel through the microwave irradiation method. X-ray diffraction analysis (XRD), Scanning electron microscopy (SEM) with, Fourier transform infrared spectroscopy (FTIR), UV–vis spectroscopy(UV–vis), and photoluminescence (PL) spectroscopy analysis were used to determine the structure, morphology, and optical features of synthesised nanocomposites. The characterized composites were used to dye degradation and electrochemical activity. Synthesized BiOCl-Fe2O3were degraded methylene blue (MB) 96.2 % in 105 min irradiation of visible light. The BiOCl-Fe2O3exhibits significant catalytic activity towards dopamine(DA) under optimal conditions. Cyclic Voltammetry(CV) and Linear sweep voltammetry (LSV) with different concentrations of DA was studied. These results indicate that this BiOCl-Fe2O3 is an effective approach for the precise and reliable identification of DA signals in biological samples.
Bimetallic CuO−ZnO Hybrid Nanocomposite Materials for Efficient Remediation of Environmental Pollutants K. Rudresha, A. Zahir Hussain, C. R. Ravikumar, M. R. Anil Kumar, A. Naveen Kumar, A. S. Manjunatha, H. P. Nagaswarupa, Shilpa Amulya, H. C. Ananda Murthy, Mireia Mallandrich Miret, Abul Kalam Azad, O. Madkhali, Mahmood D. Aljabri, Hadi M. Marwani, Mohammed M. Rahman Chemistryselect, 2023 Pure CuO and 2‐Dimentional CuO−ZnO nanocomposites (NCs) were effectively prepared by an ultrasound‐assisted probe sonication route for different ratios of CuO and ZnO, and the multifunctional properties were investigated by the application of the advanced methods. XRD (X‐ray diffraction) patterns revealed a crystallite size (D) range of 25 to 31 nm for pure CuO and CuO−ZnO NCs. According to calculations, the energy band gap value (Eg) for the NCs is between 2.15 and 2.48 eV. Under UV light irradiation, the photocatalytic degradation of pure CuO and CuO−ZnO NCs on Direct Green (DG) and Fast Blue (FB) dyes was assessed. 60 mg of the catalyst was added to 20 ppm solutions of DG and FB dye. The stock solution of the dyes was prepared 10, 15, 20 and 25 ppm of 250 ml dye solution. Electrochemical analysis using cyclic voltammetry revealed improved redox potential output in the electrode crafted with graphite powder in 0.1 N HCl electrolyte solution. These NCs were used because of their capacity to detect an extremely dangerous chemical like arsenic. The constructed electrode‘s lowest limit of detection was determined to be 110–3 mol/L. In general, vertical linearity was seen in all of the prepared nano‐electrodes, especially above 150 ohms with real axis for pure CuO but beyond 100 ohms for doped electrodes. Based on our study, we conclude that the CuO and ZnO NCs, containing 10 % of ZnO, were the most effective photocatalyst for DG and FB dyes and electrochemical sensor for Arsenic.
Use of Cu(II) catalyst assisted oxidative decolorization of dye by chlorinating species in water: A kinetic and mechanistic study with acid red1 dye Anu Sukhdev, Vijaya Latha, Pradeep Bhaskar, P.R. Deepthi, P. Mohan Kumar, A.S. Manjunatha Applied Surface Science Advances, 2023 A quick and easy decolorization method has been created in the current study to get rid of the Acid Red 1 (AR1) dye from the wastewater. At 298 K, the kinetics of oxidative decolorization of AR1 dye with Chloramine-B (CAB) in NaOH medium, catalyzed by copper(II) sulphate, have been examined spectrophotometrically (λmax = 506nm). The experimental rate laws found are as follows: d[CAB]/dt = k [CAB]0 [AR1]0 [Cu(II)]x / [OH−]y in an alkaline medium, where x and y are less than unity.Under ideal experimental conditions, 90% dye decolorization is achieved in 30 minutes using concentrations of 0.003M [CAB], 0.0003M [AR1], 0.003M [Cu(II), and 0.003M [OH−].In the current kinetic redox system, the Cu(II) catalyst showed to be an effective homogeneous catalyst. The 4-acetamido-5,6-dioxo-5,6-dihydro naphthalene-2-sulphonic acid is identified as the oxidation product using mass spectrum analysis. The FTIR spectra show the absence of N=N stretching bands at 1489 cm−1 which confirms the oxidative breakdown of the azo group, a fundamental chromophore responsible for color, which induces toxicity in the waste water. The decolorization reaction catalyzed by Cu(II) is approximately six times faster than the uncatalyzed reaction. The catalytic constant (Kc) is calculated at various temperatures, and activation parameters for copper(II) are also evaluated. The observed results are explained by plausible mechanisms, and relative rate laws has been deduced. Chemical oxygen demand (COD) has been significantly reduced by the oxidative decolorization process. Phytotoxicity tests revealed that the treated dye sample is less toxic than the untreated dye sample. An economic analysis is carried out. Notably, with appropriate modifications, the developed oxidative decolorization technique is expected to benefit in the removal of AR1 dye present from industrial wastewater.
Decolourization of Safranine Dye by Iron(II)/HClO4/CAB System from Wastewater Assisted by Response Surface Modeling Vijaya Latha, Anu Sukhdev, Pradeep Bhaskar, P.R. Deepthi, P. Mohan Kumar, A.S. Manjunatha Asian Journal of Chemistry, 2022 The response surface methodology (RSM) is applied for predictive estimation and optimization of decolourization of safranine, a phenazine dye by a chemical oxidation process using iron(II) as homogeneous catalyst and chloramine B (CAB) as an oxidant in acid medium. All experiments were based on the statistical designs in order to develop the predictive regression models and for optimization. Four independent variables (temperature, catalyst, CAB and acid concentration) were chosen to optimize the decolourization of safranine. When variance was analyzed (ANOVA), values of R2 and adjusted R2 were 0.9618 and 0.9262, respectively. The data derived from the experiments were in alignment with a second order regression model. In order to achieve a maximum decolourization, the optimal settings were found to be 0.0178 M HClO4, 0.004 M CAB, 0.0016 M iron(II) and 43.1 ºC, respectively. Under optimal reaction conditions, effect of temperature (15, 25, 35, 45 ºC) on decolourization rate was studied. Data received were in congruence with the second order kinetics. Thermodynamic parameters were also computed for the decolourization process. Maximum percentage of decolourization of safranine was predicted and experimentally validated.
Oxidation of metformin with alkaline chloramine-B: Delineation of reaction mechanism and kinetic modeling Indian Journal of Chemistry Section A Inorganic Physical Theoretical and Analytical Chemistry, 2015
Hydrothermal route alignment of Ag/rGO@ curcumin nanocomposite: Photocatalyst degrading action and Antibacterial effectiveness KS Shalini, BD Vishwajit, R Mahadevappa, AS Manjunatha, MJN Khadri, ... Journal of the Indian Chemical Society, 102183 , 2025 2025 Citations: 4
PVA/Bi 2 WO 6 Nanocomposites: Evaluation of Bi 2 WO 6 Filler Composition on Thermal, Optical, Electrical and Photoluminescence Characteristics VH Shivarudraiah, AS Manjunatha, G Sindhu, BS Madhukar, ... Journal of Inorganic and Organometallic Polymers and Materials 35 (8), 6191-6207 , 2025 2025 Citations: 3
Fluorescent CsPbBr3@ Cs4PbBr6/PU polymer nanocomposite-based triboelectric nanogenerator for self-powered UV sensing SS Revankar, VL Yashaswini, AS Manjunatha, R Kavya, KM Gowda, ... Materials Today Chemistry 44, 102601 , 2025 2025 Citations: 7
Introduction to Nanomaterials for Energy Storage DM Tejashwini, HP Nagaswarupa, R Naik, AS Manjunatha Advanced Nanomaterials for Energy Storage Devices, 1-24 , 2024 2024 Citations: 1
Eco-friendly synthesis of indole-4-hydroxy-chromen-2-ones using green zinc oxide nanocatalyst and its assessment of anti-cancer studies against A549 cells KB Ramesh, AS Manjunatha, M Srinivas, MA Pasha Inorganic Chemistry Communications 169, 113012 , 2024 2024 Citations: 7
Cocos nucifera mediated green synthesis and characterization of BiOCl-Fe2O3 nanocomposite for photocatalytic dye degradation and electrochemical sensing of dopamine AS Manjunatha, PR Prakruthi, J Puneetha, M Shashank, G Nagaraju Sustainable Chemistry for the Environment 7, 100138 , 2024 2024 Citations: 12
Sonochemical synthesis of nickel tungstate (NiWO4) nanoparticles for dye degradation and electrochemical sensing of lead ions in environmental samples NS Pavithra, AS Manjunatha, M Shivanna, CR Ravikumar, ... Inorganic Chemistry Communications 157, 111346 , 2023 2023 Citations: 19
Bimetallic CuO− ZnO Hybrid Nanocomposite Materials for Efficient Remediation of Environmental Pollutants K Rudresha, A Zahir Hussain, CR Ravikumar, MR Anil Kumar, ... ChemistrySelect 8 (29), e202300583 , 2023 2023 Citations: 4
Use of Cu (II) catalyst assisted oxidative decolorization of dye by chlorinating species in water: A kinetic and mechanistic study with acid red1 dye A Sukhdev, V Latha, P Bhaskar, PR Deepthi, PM Kumar, AS Manjunatha Applied Surface Science Advances 16, 100435 , 2023 2023 Citations: 2
Optimization of Wear Process Parameters of Al6061‐Zircon Composites Using Taguchi Method R Vijayakumar, JS Srikantamurthy, S Patil, S Rudresha, A Manjunatha, ... Advances in Materials Science and Engineering 2023 (1), 9507757 , 2023 2023 Citations: 9
Decolorization of acid orange 8 from textile effluent using alkaline OsO4/Chloramine-B solutions: Optimization and kinetic study STS Manjunatha A. Somashekar, Anu Sukhdev, Puttaswamy . Research Journal of Chemical Sciences 12 (1), 48-57 , 2022 2022
Exploration of structural and magnetic properties of bulk and nano sized Pr0. 57Ca0. 43Mn1-YGaYO3 (Y= 0, 0.02) manganite synthesised by sol-gel method PR Koushalya, AS Manjunatha Applied Surface Science Advances 6, 100135 , 2021 2021 Citations: 13
Exploration of Ruthenium (III) Chloride catalysis on oxidative conversion of aryloximes to arylaldehydes with bromamine-B: A kinetic and mechanistic approach M A S, A Sukhdev, Puttaswam, S T S Journal of University of Shanghai for Science and Technology 23 (5), 240-261 , 2021 2021
Synthesis of Citrus Limon mediated SnO2-WO3 nanocomposite: Applications to photocatalytic activity and electrochemical sensor AS Manjunatha, NS Pavithra, M Shivanna, G Nagaraju, CR Ravikumar Journal of Environmental Chemical Engineering 8 (6), 104500 , 2020 2020 Citations: 62
Synthesis, phase transformation, and morphology of hausmannite Mn3O4 nanoparticles: Photocatalytic and antibacterial investigations. Heliyon. 6 (1), e03245 A Sukhdev, M Challa, L Narayani, AS Manjunatha, PR Deepthi, ... doi. org/10.1016/j. heliy on, e0324 , 2020 2020 Citations: 6
Synthesis, phase transformation, and morphology of hausmannite Mn3O4 nanoparticles: photocatalytic and antibacterial investigations A Sukhdev, M Challa, L Narayani, AS Manjunatha, PR Deepthi, ... Heliyon 6 (1) , 2020 2020 Citations: 134
Green Synthesis of Flower‐Like BiVO 4 Nanoparticles by Solution Combustion Method Using Lemon ( Citrus Limon ) Juice as a Fuel: Photocatalytic and … AS Manjunatha, NS Pavithra, S Marappa, SA Prashanth, G Nagaraju, ... ChemistrySelect 3 (47), 13456-13463 , 2018 2018 Citations: 38
Spectrophotometric oxidative decolorization of methyl red with chloramine-T and bromamine-T: comparative kinetic modeling and mechanistic study AS Manjunatha, A Sukhdev, Puttaswamy Russian Journal of Physical Chemistry A 92 (13), 2647-2655 , 2018 2018 Citations: 6
Synergistic effect of (RuCl3+ IrCl3) catalyzed oxidative conversion of rizatriptan benzoate to rizatriptan-N-oxide with N-haloamine: Exploration of scope, reaction behavior and … A Sukhdev, AS Manjunatha, PR Deepthi, PM Kumar Chemical Data Collections 15, 75-88 , 2018 2018 Citations: 5
OXIDATIVE DECOLORIZATION OF MONO AZO DYE ACID ORANGE 8 WITH ALKALINE CHLORAMINE-T: A KINETIC AND MECHANISTIC APPROACH ASM Puttaswamy International Journal of Innovative and Emerging Research in Engineering 4 … , 2017 2017
MOST CITED SCHOLAR PUBLICATIONS
Synthesis, phase transformation, and morphology of hausmannite Mn3O4 nanoparticles: photocatalytic and antibacterial investigations A Sukhdev, M Challa, L Narayani, AS Manjunatha, PR Deepthi, ... Heliyon 6 (1) , 2020 2020 Citations: 134
Synthesis of Citrus Limon mediated SnO2-WO3 nanocomposite: Applications to photocatalytic activity and electrochemical sensor AS Manjunatha, NS Pavithra, M Shivanna, G Nagaraju, CR Ravikumar Journal of Environmental Chemical Engineering 8 (6), 104500 , 2020 2020 Citations: 62
Green Synthesis of Flower‐Like BiVO 4 Nanoparticles by Solution Combustion Method Using Lemon ( Citrus Limon ) Juice as a Fuel: Photocatalytic and … AS Manjunatha, NS Pavithra, S Marappa, SA Prashanth, G Nagaraju, ... ChemistrySelect 3 (47), 13456-13463 , 2018 2018 Citations: 38
Sonochemical synthesis of nickel tungstate (NiWO4) nanoparticles for dye degradation and electrochemical sensing of lead ions in environmental samples NS Pavithra, AS Manjunatha, M Shivanna, CR Ravikumar, ... Inorganic Chemistry Communications 157, 111346 , 2023 2023 Citations: 19
Oxidative decolorisation of E riochrome B lack T with C hloramine‐T: kinetic, mechanistic, and spectrophotometric approaches AS Manjunatha, A Sukhdev, Puttaswamy Coloration Technology 130 (5), 340-348 , 2014 2014 Citations: 16
Exploration of structural and magnetic properties of bulk and nano sized Pr0. 57Ca0. 43Mn1-YGaYO3 (Y= 0, 0.02) manganite synthesised by sol-gel method PR Koushalya, AS Manjunatha Applied Surface Science Advances 6, 100135 , 2021 2021 Citations: 13
Cocos nucifera mediated green synthesis and characterization of BiOCl-Fe2O3 nanocomposite for photocatalytic dye degradation and electrochemical sensing of dopamine AS Manjunatha, PR Prakruthi, J Puneetha, M Shashank, G Nagaraju Sustainable Chemistry for the Environment 7, 100138 , 2024 2024 Citations: 12
Decolorization of reactive orange 16 azo dye in wastewater using CAT/IrCl3/HClO4 redox system: delineation of kinetic modeling and mechanistic approaches A Sukhdev, AS Manjunatha Journal of the Taiwan Institute of Chemical Engineers 70, 150-160 , 2017 2017 Citations: 10
Oxidative decolorization of methyl red dye with chloramine-T-Kinetic and mechanistic chemistry AS Manjunatha, A Sukhdev, Puttaswamy INDIAN JOURNAL OF CHEMICAL TECHNOLOGY 20 (6), 416-422 , 2013 2013 Citations: 10
Optimization of Wear Process Parameters of Al6061‐Zircon Composites Using Taguchi Method R Vijayakumar, JS Srikantamurthy, S Patil, S Rudresha, A Manjunatha, ... Advances in Materials Science and Engineering 2023 (1), 9507757 , 2023 2023 Citations: 9
Fluorescent CsPbBr3@ Cs4PbBr6/PU polymer nanocomposite-based triboelectric nanogenerator for self-powered UV sensing SS Revankar, VL Yashaswini, AS Manjunatha, R Kavya, KM Gowda, ... Materials Today Chemistry 44, 102601 , 2025 2025 Citations: 7
Eco-friendly synthesis of indole-4-hydroxy-chromen-2-ones using green zinc oxide nanocatalyst and its assessment of anti-cancer studies against A549 cells KB Ramesh, AS Manjunatha, M Srinivas, MA Pasha Inorganic Chemistry Communications 169, 113012 , 2024 2024 Citations: 7
Oxidative Cleavage of β ‐Lactam Ring of Cephalosporins with Chloramine‐T in Alkaline Medium: A Kinetic, Mechanistic, and Reactivity Study A Sukhdev, AS Manjunatha, P Puttaswamy International Scholarly Research Notices 2013 (1), 738932 , 2013 2013 Citations: 7
Synthesis, phase transformation, and morphology of hausmannite Mn3O4 nanoparticles: Photocatalytic and antibacterial investigations. Heliyon. 6 (1), e03245 A Sukhdev, M Challa, L Narayani, AS Manjunatha, PR Deepthi, ... doi. org/10.1016/j. heliy on, e0324 , 2020 2020 Citations: 6
Spectrophotometric oxidative decolorization of methyl red with chloramine-T and bromamine-T: comparative kinetic modeling and mechanistic study AS Manjunatha, A Sukhdev, Puttaswamy Russian Journal of Physical Chemistry A 92 (13), 2647-2655 , 2018 2018 Citations: 6
Conversion of imidazoles to imidazolones with chloramine-B: kinetic and mechanistic study AS Manjunatha, Puttaswamy Monatshefte für Chemie-Chemical Monthly 147 (9), 1517-1529 , 2016 2016 Citations: 6
Oxidative conversion of anilines to azobenzenes with alkaline chloramine-T AS Manjunatha, S Dakshayani, N Vaz, Puttaswamy Korean Journal of Chemical Engineering 33 (2), 697-706 , 2016 2016 Citations: 6
RuCl 3 Catalyzed and Uncatalyzed Oxidative Decolorization of Acid Orange 7 Dye with Chloramine-B in Acid Medium: Spectrophotometric, Kinetic and Mechanistic … AS Manjunatha, Puttaswamy Catalysis letters 145 (6), 1312-1321 , 2015 2015 Citations: 6
Synergistic effect of (RuCl3+ IrCl3) catalyzed oxidative conversion of rizatriptan benzoate to rizatriptan-N-oxide with N-haloamine: Exploration of scope, reaction behavior and … A Sukhdev, AS Manjunatha, PR Deepthi, PM Kumar Chemical Data Collections 15, 75-88 , 2018 2018 Citations: 5
Kinetic and mechanistic studies on the oxidative decolourisation of Orange-II dye with alkaline chloramine-T N Vaz, AS Manjunatha, Puttaswamy Journal of Chemical Research 39 (6), 363-367 , 2015 2015 Citations: 5
