Finely dispersed Au nanoparticles on graphitic carbon nitride as highly active photocatalyst for hydrogen peroxide production

被引:67
|
作者
Zuo, Guifu [1 ]
Liu, Shanshan [1 ]
Wang, Liang [2 ]
Song, Hui [3 ]
Zong, Peixiao [1 ]
Hou, Weishu [4 ]
Li, Bingdong [1 ]
Guo, Zhaoliang [1 ]
Meng, Xianguang [1 ,5 ]
Du, Yi [2 ]
Wang, Tao [6 ]
Roy, Vellaisamy A. L. [5 ]
机构
[1] North China Univ Sci & Technol, Coll Mat Sci & Engn, Hebei Prov Key Lab Inorgan Nonmetall Mat, Tangshan 063210, Hebei, Peoples R China
[2] Univ Wollongong, Australian Inst Innovat Mat, Inst Superconducting & Elect Mat, Wollongong, NSW 2500, Australia
[3] Hokkaido Univ, Grad Sch Chem Sci & Engn, Sapporo, Hokkaido 0600814, Japan
[4] Tianjin Univ, Sch Mat Sci & Engn, TU NIMS Int Collaborat Lab, 92 Weijin Rd, Tianjin 300072, Peoples R China
[5] City Univ Hong Kong, Dept Mat Sci & Engn, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China
[6] Nanjing Univ Aeronaut & Astronaut, Jiangsu Key Lab Mat & Technol Energy Convers, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China
基金
中国国家自然科学基金;
关键词
Photocatalysis; Hydrogen peroxide; Au; C3N4; MOLECULAR-OXYGEN; H2O2; PRODUCTION; SELECTIVE PRODUCTION; VISIBLE-LIGHT; WATER; REDUCTION; TIO2; O-2; FRAMEWORKS; OXIDATION;
D O I
10.1016/j.catcom.2019.02.011
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
In this work, graphitic carbon nitride (g-C3N4) supporting finely dispersed Au nanoparticles is developed as a simple and efficient photocatalyst for H2O2 production under visible light irradiation. Au nanoparticle cocatalyst remarkably enhances photocatalytic activity of C3N4 for H2O2 production. Due to the inert nature to catalyze the decomposition of H2O2, Au/C3N4 also exhibits stable H2O2 evolution rate. It is of great interest that the maximal H2O2 production activity is reached at the loading amount of Au as low as 0.01%, revealing the great catalytic efficacy of highly dispersed Au cocatalyst during the photocatalytic H2O2 synthesis and the possibility to produce concentrated H2O2 using C3N4 with extremely low Au loading amount. The in situ electron spin resonance studies reveal that the H2O2 is produced through direct 2e(-) oxygen reduction over Au/C3N4 photocatalyst.
引用
收藏
页码:69 / 72
页数:4
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