Enhanced Photocatalytic Water Oxidation Efficiency with NiO@MnO2 Catalysts Based on Abundant Metals

被引：3
作者：
Du, Xiaoqiang [1 ]
Ding, Yong [1 ,2 ]
Xiang, Xu [2 ]
机构：
[1] Lanzhou Univ, Coll Chem & Chem Engn, Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Peoples R China
[2] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
来源：
ENERGY AND ENVIRONMENT FOCUS | 2015年 / 4卷 / 04期
基金：
中国国家自然科学基金;
关键词：
NiO@MnO2 Nanocomposite; Photocatalytic; Water Oxidation; High Stability; X-ray Photoelectron Spectroscopy;
D O I：
10.1166/eef.2015.1175
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
NiO@MnO2 nanocomposite has been prepared. It has been examined as catalyst in photocatalytic water oxidation using [Ru(bpy)(3)](2+) and S2O82- as a photosensitizer and a sacrificial oxidant, respectively. The apparent TOF value with NiO@MnO2 (2.08 x 10(-3) s(-1) per Mn) is far larger than that with commercial MnO2 (1.90 x 10(-4) s(-1) per Mn) and MnO2 nanotubes (4.30 x 10(-4) s(-1) per Mn). The NiO@MnO2 nanocomposite can be easily separated from reaction solution by centrifugation separation while maintaining excellent water oxidation activity in the fifth runs. The surface conditions of NiO@MnO2 nanocomposite also remain unchanged after examination by X-ray photoelectron spectroscopy (XPS) before and after the photocatalytic reaction. NiO nanowires provide a facile hole pathway from photo-induced [Ru(bpy)(3)](3+) molecules to the MnO2, leading to a high water oxidation activity and high stability.
引用
收藏
页码：307 / 315
页数：9
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