Potential of Ag–Fe co-doped TiO2 nanocomposite for solar photocatalysis of high COD pharmaceutical effluent and influencing factors

Ag–Fe co-doped TiO 2 photocatalysts were synthesized by sol–gel method followed by calcination and characterized using X-ray diffraction, scanning electron microscopy, Brunauer–Emmett–Teller, UV–Vis spectroscopy, transmission electron microscopy (TEM) and energy-dispersive X-ray analysis. Photocatal...

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Bibliographic Details
Published in:Energy, ecology and environment (Online) ecology and environment (Online), 2020-10, Vol.5 (5), p.344-358
Main Authors: Darshana, Bhatti, Parikh, Sachin, Shah, Manan
Format: Article
Language:English
Subjects:
Adsorption
Biodegradation
Catalysts
Catalytic activity
Chemical oxygen demand
Composition
Degradation
Dosage
Ecology
Effluents
Electron microscopy
Energy
Energy dispersive X ray analysis
Environment
Iron
Mineralization
Nanocomposites
Nanoparticles
Optical properties
Organic chemicals
Original Article
Pharmaceuticals
Photocatalysis
Photocatalysts
Photodegradation
Photovoltaic cells
Pollutants
Radiation
Scanning electron microscopy
Silver
Sol-gel processes
Solar radiation
Spectroscopy
Spectrum analysis
Titanium
Titanium dioxide
Transmission electron microscopy
Wastewater treatment
X ray analysis
X-ray diffraction
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Summary:Ag–Fe co-doped TiO 2 photocatalysts were synthesized by sol–gel method followed by calcination and characterized using X-ray diffraction, scanning electron microscopy, Brunauer–Emmett–Teller, UV–Vis spectroscopy, transmission electron microscopy (TEM) and energy-dispersive X-ray analysis. Photocatalytic activity of these photocatalysts was compared with undoped TiO 2 and Fe-doped TiO 2 for the degradation of synthetic wastewater prepared from diflourotriazoleacetophenone (DFTA) (initial concentration of 8 g/L with initial COD of 75,000 mg/L). The nanoparticles were engineered by varying the catalyst composition (Ti/Ag molar ratio 10–55) for efficient photocatalytic degradation of DFTA. Factors affecting degradation such as catalyst dosage (1–8 g/L), adsorption time in dark (15–60 min) and pH (2–8) were studied to determine optimum conditions for wastewater treatment. The catalyst composition with Fe content of 0.5 wt% and Ti-to-Ag molar ratio of 30, catalyst dosage of 3 g/L, pH 5, adsorption time in dark of 30 min and solar radiation time of 5 h were found to be the optimum conditions for the efficient photocatalytic degradation of DFTA.
ISSN:2363-7692
2363-8338
DOI:10.1007/s40974-020-00162-6