Efficient piezo-catalytic hydrogen peroxide production from water and oxygen over graphitic carbon nitride

doi:10.1039/c9ta06251c

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	Efficient piezo-catalytic hydrogen peroxide production from water and oxygen over graphitic carbon nitride
	Wang, Kefu; Shao, Dengkui; Zhang, Ling; Zhou, Yuanyi; Wang, Haipeng; Wang, Wenzhong
	2019-09-21
Source Publication	JOURNAL OF MATERIALS CHEMISTRY A
ISSN	2050-7488
Volume	7 Issue:35 Pages:20383
Subtype	Article
Abstract	Design of a green and sustainable approach for H2O2 synthesis is a meaningful subject. Herein, we propose a piezo-catalytic method for H2O2 production by utilizing a metal-free g-C3N4 catalyst, which has high activity for generating H2O2 only from H2O and O-2 under ultrasonic vibration by means of converting mechanical energy to chemical energy. Without any organics, the ultrasonic-driven generation rate of H2O2 reached 34 mu mol h(-1). KMnO4 reduction experiments confirmed the generation of polarized electrons for g-C3N4 under ultra-sonication, while Au deposition on the edge of g-C3N4 after piezo-catalytic reduction of HAuCl4 indicated that the ultrasonic-derived piezoelectric polarization over g-C3N4 was along the g-C3N4 plane. The construction of C or N vacancies could change the piezoelectric response of g-C3N4, which was confirmed by Piezoresponse Force Microscopy (PFM), and the result showed that the g-C3N4 containing C or N vacancies exhibited a weaker piezoelectric effect and poorer ultrasonic-assisted catalytic performance than pristine g-C3N4 due to the impairment of the crystal structure. Our work reports the piezo-catalytic effect of g-C3N4 and it may help provide a green and sustainable process of generating H2O2 directly from water and oxygen.
DOI	10.1039/c9ta06251c
Language	英语
WOS Research Area	Chemistry ; Energy & Fuels ; Materials Science
Publisher	ROYAL SOC CHEMISTRY
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/26825
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Wang, Kefu,Shao, Dengkui,Zhang, Ling,et al. Efficient piezo-catalytic hydrogen peroxide production from water and oxygen over graphitic carbon nitride[J]. JOURNAL OF MATERIALS CHEMISTRY A,2019,7(35):20383.
APA	Wang, Kefu,Shao, Dengkui,Zhang, Ling,Zhou, Yuanyi,Wang, Haipeng,&Wang, Wenzhong.(2019).Efficient piezo-catalytic hydrogen peroxide production from water and oxygen over graphitic carbon nitride.JOURNAL OF MATERIALS CHEMISTRY A,7(35),20383.
MLA	Wang, Kefu,et al."Efficient piezo-catalytic hydrogen peroxide production from water and oxygen over graphitic carbon nitride".JOURNAL OF MATERIALS CHEMISTRY A 7.35(2019):20383.

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