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

被引：25

作者：

Jia, Yuhong ^{[1
,2
]}

Ye, Long ^{[1
]}

Kang, Xi ^{[1
]}

You, Hong ^{[1
,2
]}

Wang, Shutao ^{[1
]}

Yao, Jie ^{[1
]}

机构：

[1] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China

[2] Harbin Inst Technol Weihai, Sch Marine Sci & Technol, Weihai 264209, Peoples R China

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2016年 / 328卷

关键词：

Perchlorate; Photoelectrocatalytic reduction; TiO2 nanotube arrays; Ag nanoparticles; PHOTOCATALYTIC NITRATE REDUCTION; WATER; NANOPARTICLES; DEGRADATION; DECOLORIZATION; NITROGEN; REMOVAL; CARBON;

D O I：

10.1016/j.jphotochem.2016.05.023

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 (This) 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. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：225 / 232

页数：8

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