Fabrication of polyaniline sensitized grey-TiO2 nanocomposites and enhanced photocatalytic activity

被引：27

作者：

Xu, Shuai ^{[1
]}

Han, Yide ^{[1
]}

Xu, Yan ^{[1
]}

Meng, Hao ^{[1
]}

Xu, Junli ^{[1
]}

Wu, Junbiao ^{[1
]}

Xu, Ye ^{[1
]}

Zhang, Xia ^{[1
]}

机构：

[1] Northeastern Univ, Coll Sci, Dept Chem, Shenyang 110819, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2017年 / 184卷

基金：

中国国家自然科学基金;

关键词：

Photocatalysis; Photoinduced charge separation; Hydrogen generation; Grey-TiO2; Polyaniline; TIO2 NANOTUBE ARRAYS; TITANIUM-DIOXIDE; HYDROGEN-PRODUCTION; SOLAR ABSORPTION; RHODAMINE-B; WATER; PERFORMANCE; COMPOSITE; DEGRADATION; NANOFIBERS;

D O I：

10.1016/j.seppur.2017.04.025

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The highly efficient composite photocatalysts composed of grey-TiO2 and electrically conductive polyani-line (PANI) have been fabricated through an in situ polymerization of aniline in the presence of grey-TiO2 nanoparticles. The grey-TiO2 nanoparticles were prepared via a chemical reduction method by reducing bare white-TiO2 nanoparticles with aluminium powder under nitrogen, atmosphere. The morphology, crystalline structure and optical property of these PANI sensitized grey-TiO2 nanocomposites were investigated, and their photocatalytic activity in the phtocatalytic hydrogen generation and photodegradation of Rhodamine B were evaluated. Compared with grey-TiO2, the PANI/grey-TiO2 nanocomposites showed obviously improved photocatalytic efficiency both in the hydrogen production and the degradation of Rhodamine B. The hydrogen generation rate under simulated sunlight irradiation for PANI/grey-TiO2 nanocomposites was higher than that of most reported TiO2-based species. The photocatalytic mechanism analyses indicated that the PANI served as co-catalysts in promoting separation of photoinduced charges, and photoelectrons and holes.can transfer efficiently at interface of PANI and grey-TiO2, and thus inhibited the recombination of photo generated electron-hole pairs. This article elucidated a promising colored TiO2 based system, which can be applied in the photocatalytic reactors induced by sunlight irradiation. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：248 / 256

页数：9

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