Covalently functionalized TiO2 with ionic liquid: A high-performance catalyst for photoelectrochemical water oxidation

被引：32

作者：

Jing, Lin ^{[1
]}

Wang, Min ^{[1
]}

Li, Xinyuan ^{[1
]}

Xiao, Ruoyun ^{[1
]}

Zhao, Yufei ^{[1
]}

Zhang, Yuxia ^{[1
]}

Yan, Yi-Ming ^{[1
]}

Wu, Qin ^{[1
]}

Sun, Kening ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Chem Engn & Environm, Beijing Key Lab Chem Power Source & Green Catalys, Beijing 100081, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2015年 / 166卷

基金：

中国国家自然科学基金;

关键词：

TiO2; Ionic liquid; Photoelectrochemical activity; Water oxidation; Oxygen; ENHANCED PHOTOCATALYTIC ACTIVITY; NANOTUBES; OXIDE;

D O I：

10.1016/j.apcatb.2014.11.046

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：

Ionic liquid (IL) [BsAIm][HSO4] was covalently introduced to TiO2 through a simple route. The synthesized IL-TiO2 hybrid was thoroughly studied by using scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The as-prepared IL-TiO2 not only exhibits a significantly enhanced photoelectrochemical (PEC) activity, which is almost ten-fold higher than that of the bare TiO2, but also possesses promising photostability under continuous working conditions. Based on the results, such as charge transfer efficiency, UV-Vis absorption spectroscopy, photoluminescence (PL) emission spectroscopy, and incident-photon-to-current-conversion efficiency (IPCE) tests, we propose a reasonable mechanism to understand the enhanced performance of the IL-TiO2 toward PEC water oxidation. The significant enhanced PEC performance of IL-TiO2 should be ascribed to a synergistic effect between covalently linked IL units and TiO2 particles. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：270 / 276

页数：7

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