Enhanced Photocatalytic Performance of Carbon-Coated TiO2_(x) with Surface-Active Carbon Species

doi:10.1021/acs.jpcc.8b02716

CORC > 武汉物理与数学研究所 > 中国科学院武汉物理与数学研究所 > 磁共振应用研究部

	Enhanced Photocatalytic Performance of Carbon-Coated TiO2_(x) with Surface-Active Carbon Species
	Liu, Fen 1,2; Deng, Feng 1; Xu, Jun 1; Wang, Qang 1; Yang, Longxiao 1,2; Feng, Ningdong 1
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2018-05-24
卷号	122 期号:20 页码:10948-10955
DOI	10.1021/acs.jpcc.8b02716
文献子类	Article
英文摘要	Carbon (C) coating on the TiO2 surface has attracted extensive research interest due to the unique properties of the conjugated materials in electron transport and photoelectronic coupling ability. However, owing to the complexity of surface C species, there is no experimental study on their structure and property. Although the C-coated TiO2_(x) photocatalyst (C/TiO2_(x) and its corresponding acid-washed sample (C/TiO2_(x)) exhibit similar visible-light absorption, their catalytic activity is quite different. According to high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, electron spin resonance, and NMR results, the only structural difference between C/TiO2_(x) and C/TiO2_(X) lies in the surface C species. Our NMR experimental results show that several C species (including alkoxy and carboxylate, and macromolecular graphitelike C) are present in C/TiO2_(x), whereas only macromolecular graphitelike C exists in C/TiO2_(x). Combined with the photocatalytic activity measurements, it can be deduced that the surface graphitelike C should be the active C sites, which facilitate the separation of photoinduced electron and hole and lead to the exceptionally high photocatalytic activity for C/TiO2_(x), whereas the alkoxy and carboxylate C species that should be the recombination centers would poison seriously the surface of C/TiO2_(x). Accordingly, the hole and electron transfer mechanism in the C-coated TiO2_(x) photocatalyst is proposed.
WOS关键词	VISIBLE-LIGHT PHOTOCATALYSIS ; SOLID-STATE NMR ; HYDROGEN-PRODUCTION ; CHARGE-TRANSFER ; GOLD NANORODS ; WATER ; GRAPHENE ; OXIDE ; NANOCOMPOSITE ; NANOPARTICLES
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
WOS记录号	WOS:000433403400030
资助机构	National Natural Science Foundation of China(21673283 ; National Natural Science Foundation of China(21673283 ; 21473246 ; 21473246 ; 21733013) ; 21733013) ; National Natural Science Foundation of China(21673283 ; National Natural Science Foundation of China(21673283 ; 21473246 ; 21473246 ; 21733013) ; 21733013)
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/12003]
专题	武汉物理与数学研究所_磁共振应用研究部
作者单位	1.Chinese Acad Sci, State Key Lab Magnet Resonance & Atom & Mol Phys, Natl Ctr Magnet Resonance Wuhan, Wuhan Inst Phys & Math,Key Lab Magnet Resonance B, Wuhan 430071, Hubei, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Fen,Deng, Feng,Xu, Jun,et al. Enhanced Photocatalytic Performance of Carbon-Coated TiO2_(x) with Surface-Active Carbon Species[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2018,122(20):10948-10955.
APA	Liu, Fen,Deng, Feng,Xu, Jun,Wang, Qang,Yang, Longxiao,&Feng, Ningdong.(2018).Enhanced Photocatalytic Performance of Carbon-Coated TiO2_(x) with Surface-Active Carbon Species.JOURNAL OF PHYSICAL CHEMISTRY C,122(20),10948-10955.
MLA	Liu, Fen,et al."Enhanced Photocatalytic Performance of Carbon-Coated TiO2_(x) with Surface-Active Carbon Species".JOURNAL OF PHYSICAL CHEMISTRY C 122.20(2018):10948-10955.