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Photoelectrocatalytic reduction of perchlorate in aqueous solutions over Ag doped TiO2 nanotube arrays

Paper ID Volume ID Publish Year Pages File Format Full-Text
25937 43920 2016 8 PDF Available
Title
Photoelectrocatalytic reduction of perchlorate in aqueous solutions over Ag doped TiO2 nanotube arrays
Abstract

•Perchlorate can be reduced using Ag nanoparticles loaded TiO2 nanotube arrays.•The photoelectrocatalytic properties of Ag-TNTs were studied upon UV irradiation.•Influencing factors and reaction mechanisms of perchlorate reduction were discussed.

Photoelectrocatalytic reduction of aqueous perchlorate using Ag nanoparticles loaded TiO2 nanotube arrays (Ag-TNTs) in the presence of a hole scavenger (citric acid, Cit) under UV light irradiation was investigated in this study. TiO2 nanotube arrays (TNTs) were prepared by anodic oxidation and Ag nanoparticles were loaded on TNTs by photodeposition. Ag-TNTs were characterized by X-ray diffraction, scanning electron microscope and X-ray photoelectron spectroscopy. The influences of Ag doping content, photogenerated electron, photogenerated hole, hydroxyl radical, initial pH and applied voltages on photoelectrocatalytic perchlorate reduction were studied and the optimum reaction conditions were determined. Results indicated that Ag-TNTs have the best photoelectrocatalytic activity when the nominal mass ratio of Ag to TiO2 is 0.84%. With an initial perchlorate concentration of 0.001 mM, the perchlorate reduction efficiency can reach 62% in the presence of Cit (0.15 mM) after 6 h reaction (368 ± 0.5 K) at applied voltage of 1.5 V.

Keywords
Perchlorate; Photoelectrocatalytic reduction; TiO2 nanotube arrays; Ag nanoparticles
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Photoelectrocatalytic reduction of perchlorate in aqueous solutions over Ag doped TiO2 nanotube arrays
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 328, 1 September 2016, Pages 225–232
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us