Effective nitrogen doping of TiO 2 polymorphs at mild temperatures for visible-light-responsive hydrogen evolution

doi:10.1016/j.jcis.2024.03.075

IMR OpenIR

	Effective nitrogen doping of TiO 2 polymorphs at mild temperatures for visible-light-responsive hydrogen evolution
	Chen, Yaping 1,2; Ma, Shangyi 2; Yang, Yongqiang 1,2; Qiu, Jianhang 2; Kang, Xiangdong 2; Ab, Gang Liu 1,2
通讯作者	Yang, Yongqiang(yqyang@imr.ac.cn) ; Ab, Gang Liu(gangliu@imr.ac.cn)
	2024-06-15
发表期刊	JOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN	0021-9797
卷号	664 页码:640-649
摘要	Herein, a mild-temperature nitrogen doping route with the urea-derived gaseous species as the active doping agent is proposed to realize visible-light-responsive photocatalytic hydrogen evolution both for the anatase and rutile TiO2. DFT simulations reveal that the cyanic acid (HOCN), derived from the decomposition of urea, plays a curial role in the effective doping of nitrogen in TiO2 at mild temperatures. Photocatalytic performance demonstrates that both the anatase and rutile TiO2 doped at mild temperatures exhibit the highest hydrogen evolution rates, although the ones prepared at high temperatures possess higher absorbance in the visible range. Steady-state and transient surface photovoltage characterizations of these doped TiO2 polymorphs prepared at different temperatures reveal that harsh conditions (high temperature reaction) typically result in the formation of intrinsic defects that are detrimental to the transport of the low-energy visible-light-induced electrons, while the mild-temperature nitrogen-doping could flatten the pristine upward band bending without triggering the formation of Ti3+, thus achieving enhanced visible-light-responsive hydrogen evolution rates. We anticipate that our findings will provide inspiring information for shrinking the gap between the visible -light -absorbance and the visible -light -responsiveness in the band engineering of wide-bandgap metal -oxide photocatalysts.
关键词	Visible light absorption Band engineering Dope Charge transfer Visible light responsiveness
资助者	National Natural Science Foundation of China (NSFC) ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
DOI	10.1016/j.jcis.2024.03.075
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[52072379] ; National Natural Science Foundation of China (NSFC)[U2202252] ; National Natural Science Foundation of China (NSFC)[51825204] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2022190]
WOS研究方向	Chemistry
WOS类目	Chemistry, Physical
WOS记录号	WOS:001225829400001
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/186307
专题	中国科学院金属研究所
通讯作者	Yang, Yongqiang; Ab, Gang Liu
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Chen, Yaping,Ma, Shangyi,Yang, Yongqiang,et al. Effective nitrogen doping of TiO 2 polymorphs at mild temperatures for visible-light-responsive hydrogen evolution[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2024,664:640-649.
APA	Chen, Yaping,Ma, Shangyi,Yang, Yongqiang,Qiu, Jianhang,Kang, Xiangdong,&Ab, Gang Liu.(2024).Effective nitrogen doping of TiO 2 polymorphs at mild temperatures for visible-light-responsive hydrogen evolution.JOURNAL OF COLLOID AND INTERFACE SCIENCE,664,640-649.
MLA	Chen, Yaping,et al."Effective nitrogen doping of TiO 2 polymorphs at mild temperatures for visible-light-responsive hydrogen evolution".JOURNAL OF COLLOID AND INTERFACE SCIENCE 664(2024):640-649.