Enhanced photoelectrocatalytic degradation of 2,4-dichlorophenoxyacetic acid by CuInS2 nanoparticles deposition onto TiO2 nanotube arrays

被引：63

作者：

Liu, Ronghua ^{[1
]}

Liu, Yutang ^{[1
,2
]}

Liu, Chengbin ^{[1
]}

Luo, Shenglian ^{[1
,3
]}

Teng, Yarong ^{[1
]}

Yang, Lixia ^{[1
,3
]}

Yang, Renbin ^{[2
]}

Cai, Qingyun ^{[1
]}

机构：

[1] Hunan Univ, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China

[2] Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Hunan, Peoples R China

[3] Nanchang Hangkong Univ, Sch Environm & Chem Engn, Nanchang 330063, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 05期

基金：

美国国家科学基金会;

关键词：

TiO2; nanotube; CuInS2; Photoelectrocatalysis; 2,4-Dichlorophenoxyacetic acid; HETEROGENEOUS PHOTOCATALYTIC DECOMPOSITION; THIN-FILMS; FABRICATION; ELECTRODEPOSITION; MINERALIZATION; METHANOL; PHENOL;

D O I：

10.1016/j.jallcom.2010.11.040

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：

Surface modification of TiO2 nanotube (NT) arrays with CuInS2 nanoparticles (NPs) for photocatalytic degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) was reported. A pulse electrodeposition technique was used to prepare the CuInS2 NPs, and the resulted CuInS2 NPs, with a uniform size of about 20 nm, were found to deposit on the top surface of the highly oriented TiO2 NT while without clogging the tube entrances. Compared with the unmodified TiO2 NT, the CuInS2 NPs modified TiO2 NT (CuInS2-TiO2 NT) showed significantly enhanced photocatalytic activity towards 2,4-D undervisible light. After 160 min irradiation, the removal rate of 2,4-D is 100% by using CuInS2-TiO2 NT, much higher than 65.2% by using the unmodified TiO2 NT in photoelectrocatalytic process. The increased photodegradation efficiency mainly results from the improved photocurrent density as results of enhanced visible-light absorption and decreased hole-electron recombination due to the presence of narrow-band-gap p-type semiconductor CuInS2. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2434 / 2440

页数：7

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