Green approach for hierarchical nanostructured Ag-ZnO and their photocatalytic performance under sunlight

“…It was 63 and 75% for 1.5Cu–TiO 2 . So, for 1.5Cu–TiO 2 , the dye decomposition was the combined effect of photocatalysis and photosensitization .…”

Section: Resultsmentioning

confidence: 98%

Steroid glycosides as potential analytes for Cu‐doping on TiO₂ for photocatalytic water treatment

Ghosh

Chelli

Giri

et al. 2018

Env Prog and Sustain Energy

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The kernel of Thevetia peruviana, a toxic ornamental shrub, is rich in cardiac glycosides and, its concentration could be as high as 4.8%. This work aimed for the functionalization of a photocatalyst support, TiO2 by Cu‐doping using a facile bio‐mediated green methodology. Herein, the mechanism of Cu‐doping on TiO2 mediated by cardiac glycosides present in the bioextract is proposed. Cu(II) was first immobilized on TiO2 and, then the aqueous kernel extract of T. peruviana was used to dope Cu(II) on TiO2 at room temperature. The loading of Cu doped on TiO2 was found to be about 99% of the initial amount of Cu(II) taken in the immobilization stage. With the increase in Cu loading, there was a gradual redshift in the optical absorbance but the optimal dopant concentration was found to be 1.5% (true loading). The polydispersity index was increased by 1.8‐folds due to the transformation of the rutile phase to the anatase phase (maximum 8.48%) and increase in the crystallite size (17.7–24.5 nm). Cu‐doped TiO2 exhibited as high as 75% trypan blue dye degradation in 120 min at the optimal dopant concentration under the visible light irradiation by the combined effect of photocatalysis and photosensitization which was originated in the presence of trypan blue dye. However, the photosensitization effect due to the adsorption of pigments present in the bioextract was also insignificant as evidenced from the decomposition of a colorless pharmaceutical compound. The electron spin resonance spectra confirmed that normalO2•− radicals primarily caused the dye decomposition. © 2018 American Institute of Chemical Engineers Environ Prog, 37: 1901–1907, 2018

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“…Because of the non-toxicity, easy fabrication, high-photocatalytic, electrochemical and adsorptive properties, ZnO is considered as one of the efficient adsorbent for the removal of various toxic and hazardous chemicals and dyes [38][39][40][41]. However, with amendable surface area and high available adsorption sites of ZnO nanomaterials can enhance its utility for various other applications, especially for dye removal and adsorption of toxic chemicals and dyes [42][43][44][45][46]. It is important to mention that the pH of the zero point of charge (pHzpc) of bare ZnO is 9 which enable this material to act as effective adsorbent for the efficient adsorption of various dyes and harmful chemicals through electrostatic attraction phenomena [44].…”

Section: Introductionmentioning

confidence: 99%

“…However, with amendable surface area and high available adsorption sites of ZnO nanomaterials can enhance its utility for various other applications, especially for dye removal and adsorption of toxic chemicals and dyes [42][43][44][45][46]. It is important to mention that the pH of the zero point of charge (pHzpc) of bare ZnO is 9 which enable this material to act as effective adsorbent for the efficient adsorption of various dyes and harmful chemicals through electrostatic attraction phenomena [44].…”

Section: Introductionmentioning

confidence: 99%

1-butyl-3-methylimidazolium tetrafluoroborate functionalized ZnO nanoparticles for removal of toxic organic dyes

Chaudhary

Kaur

Umar

et al. 2016

Journal of Molecular Liquids

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Green approach for hierarchical nanostructured Ag-ZnO and their photocatalytic performance under sunlight

Cited by 234 publications

References 72 publications

Electrochemical heavy metal detection, photocatalytic, photoluminescence, biodiesel production and antibacterial activities of Ag–ZnO nanomaterial

Electrochemical heavy metal detection, photocatalytic, photoluminescence, biodiesel production and antibacterial activities of Ag–ZnO nanomaterial

Steroid glycosides as potential analytes for Cu‐doping on TiO₂ for photocatalytic water treatment

1-butyl-3-methylimidazolium tetrafluoroborate functionalized ZnO nanoparticles for removal of toxic organic dyes

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Green approach for hierarchical nanostructured Ag-ZnO and their photocatalytic performance under sunlight

Cited by 234 publications

References 72 publications

Electrochemical heavy metal detection, photocatalytic, photoluminescence, biodiesel production and antibacterial activities of Ag–ZnO nanomaterial

Electrochemical heavy metal detection, photocatalytic, photoluminescence, biodiesel production and antibacterial activities of Ag–ZnO nanomaterial

Steroid glycosides as potential analytes for Cu‐doping on TiO2 for photocatalytic water treatment

1-butyl-3-methylimidazolium tetrafluoroborate functionalized ZnO nanoparticles for removal of toxic organic dyes

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Steroid glycosides as potential analytes for Cu‐doping on TiO₂ for photocatalytic water treatment