Template-Free Processing of Ag-Anchored ZnO Polyscale Sheets and Their Application in the Photocatalytic Degradation of Organics Present in Pharmaceutical Waste

Sajan, C. P.; Naik, Amol; Girish, H. N.; Ravi, H. R.; Singh, Rupesh Kumar

doi:10.1007/s41101-017-0022-6

Cited by 9 publications

(3 citation statements)

References 56 publications

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“…The band at 1362 cm −1 indicates the presence of C-O-H bending mode (Sundrarajan et al 2015 ). The stretching vibration of carbonyl group characteristic of the secondary amides and other compounds containing C=O group gave rise to band around 1640 cm −1 (Yadav et al 2018 , Sajan et al 2017 ). Strong spectral peak at 3430 cm −1 in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Novel organic assisted Ag-ZnO photocatalyst for atenolol and acetaminophen photocatalytic degradation under visible radiation: performance and reaction mechanism

Ramasamy¹,

Jeyanthi²,

Chinnaiyan

2021

Environ Sci Pollut Res

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This study is on photocatalytic degradation of pharmaceutical residues of atenolol (ATL) and acetaminophen (ACT) present in secondary effluent under visible light irradiation stimulated by Ag doped ZnO (Ag-ZnO) photocatalyst. Lawsonia inermis leaf extract was used for reduction of Zinc sulphate to ZnO nanoparticles (NPs). Further, ZnO NPs were doped with Ag and characterized by XRD, FT-IR, SEM-EDX, surface area analyzer, UV-Vis, and photoluminescence spectrometry to analyze the structure, morphology, chemical composition, and optical property. FT-IR analysis revealed major functional groups such as OH, C=O, and SEM analysis depicted the polyhedron shape of the NPs with size range of 100 nm. Ag-ZnO NPs were used in the photocatalytic degradation of ATL and ACT, and its removal was evaluated by varying initial contaminant concentration, catalyst dosage, and initial pH. Findings indicate that Ag-ZnO NPs demonstrated relative narrow bandgap and efficient charge separation that resulted in enhanced photocatalytic activity under visible light illumination. The photocatalytic degradation of ATL and ACT fitted well with pseudo-first-order kinetic model. Further, it was found that under optimal conditions of 5 mg/L of contaminants, pH of 8.5, and catalyst dose of 1 g/L, degradation efficiency of 70.2% (ATL) and 90.8% (ACT) was achieved for a reaction time of 120 min. More than 60% reduction in TOC was observed for both contaminants and OH• pathway was found to be the major removal process. Ag-ZnO photocatalyst showed good recycling performance, and these findings indicate that it could be cost effectively employed for removing emerging contaminants under visible light radiation. Supplementary Information The online version contains supplementary material available at 10.1007/s11356-021-13532-2.

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Section: Resultsmentioning

confidence: 99%

“…The hydroxyl groups were notably shifted to 3200 cm −1 . Also, spectral peak at 538 cm −1 can be attributed to characteristic stretching mode of Ag-O (Sajan et al 2017 ).…”

Section: Resultsmentioning

confidence: 99%

Novel organic assisted Ag-ZnO photocatalyst for atenolol and acetaminophen photocatalytic degradation under visible radiation: performance and reaction mechanism

Ramasamy¹,

Jeyanthi²,

Chinnaiyan

2021

Environ Sci Pollut Res

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“…This suggests that the GNCs are grown as template/substrate structures in between the NCO nanoparticles, which enhance the electrocatalytic performance of NCO-NF. Further, the supplementary peaks in Figure 3l around 295 eV and 297 eV are due to oxidation of carbon-based material (CO2 formed are adsorbed on cations) [43] and surface charging [44], respectively, as a result of Ar + ion etching during XPS analysis. The presence of GNC boosts up the electrocatalytic activity due to the presence of large surface area, active (defective) sites (by physic or chemisorption), and enhanced electrical/ionic conductivity [13,26,32].…”

Section: Structural Defects and Non-crystallinitymentioning

confidence: 99%

Graphene nanoclusters embedded nickel cobaltite nanofibers as multifunctional electrocatalyst for glucose sensing and water-splitting applications

Kumar

Gudla

Ambat

et al. 2019

Ceramics International

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Fabrication of MoS2-deposited TiO2 hollow microspheres and their enhanced photocatalytic application in the generation of hydrogen

Chimmikuttanda¹,

Akple

Naik³

et al. 2020

Mater Renew Sustain Energy

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MoS2-deposited TiO2 hollow spheres were synthesized successfully under mild temperature and autogenous pressure. The hydrothermal technique was adopted for the synthesis of the TiO2 hollow microsphere, followed by a photodeposition technique for the deposition of MoS2. The physical and chemical nature of the samples was characterized using X-ray diffraction, energy-dispersive X-ray spectroscopy, scanning electron microscopy, photoluminescence spectroscopy, XPS and UV–vis spectroscopy. In an aqueous medium under the influence of light, the characterized samples were used in the production of hydrogen via photocatalysis. The increase in the formation of hydrogen content during photocatalysis confirms the successful generation and the benefits of the photogenerated carriers. With an increase in the MoS2 content, there is an incredible change in the photocatalytic performance. The resultant is due to the free moment of the holes and electrons and lessening in charge recombination centres formed as a result of the nano-heterojunction linking between MoS2 and TiO2. A more significant photocatalytic production of hydrogen was achieved using 50 MST sample i.e. 106 μmol−1 g−1 beyond which it tends to decrease with an increase in MoS2 content. Graphic abstract

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Template-Free Processing of Ag-Anchored ZnO Polyscale Sheets and Their Application in the Photocatalytic Degradation of Organics Present in Pharmaceutical Waste

Cited by 9 publications

References 56 publications

Novel organic assisted Ag-ZnO photocatalyst for atenolol and acetaminophen photocatalytic degradation under visible radiation: performance and reaction mechanism

Novel organic assisted Ag-ZnO photocatalyst for atenolol and acetaminophen photocatalytic degradation under visible radiation: performance and reaction mechanism

Graphene nanoclusters embedded nickel cobaltite nanofibers as multifunctional electrocatalyst for glucose sensing and water-splitting applications

Fabrication of MoS2-deposited TiO2 hollow microspheres and their enhanced photocatalytic application in the generation of hydrogen

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