Synergetic effect between photocatalysis on TiO2 and solar light-driven thermocatalysis on MnOx for benzene purification on MnOx/TiO2 nanocomposites

被引：96

作者：

Ma, Yan ^{[1
]}

Li, Yuanzhi ^{[1
]}

Mao, Mingyang ^{[1
]}

Hou, Jingtao ^{[1
]}

Zeng, Min ^{[1
]}

Zhao, Xiujian ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 10期

基金：

中国国家自然科学基金;

关键词：

PHOTOSENSITIZED TITANIUM-DIOXIDE; VOLATILE ORGANIC-COMPOUNDS; VISIBLE-LIGHT; DOPED TIO2; CODOPED TIO2; ANATASE TIO2; RUTILE TIO2; EFFICIENT DEGRADATION; CHARGE SEPARATION; 001; FACETS;

D O I：

10.1039/c5ta00126a

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：

MnOx/TiO2 nanocomposites are prepared by the hydrothermal redox reaction of Mn(NO3)(2) and KMnO4 with KMnO4/Mn(NO3)(2) molar ratio of 2 : 1 in the presence of TiO2(P25). The MnOx/TiO2 nanocomposites are characterized by XRD, TEM, EDX, XPS, and BET. Manganese oxide supported on TiO2 nanoparticles is amorphous. The MnOx/TiO2 nanocomposites can efficiently transform absorbed solar energy into thermal energy, resulting in a considerable increase of temperature. The MnOx/TiO2 nanocomposites exhibit excellent catalytic activity and durability for the gas-phase oxidation of carcinogenic and recalcitrant benzene under the irradiation of full solar spectrum light and visible-infrared light. For the first time, we find a synergetic effect between photocatalysis on TiO2 and solar light-driven thermocatalysis on supported manganese oxide, which significantly improves the catalytic activity of the MnOx/TiO2 nanocomposites.

引用

页码：5509 / 5516

页数：8

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