Triggering efficient photocatalytic water oxidation reactions over BaNbO2N by incorporating Ca at B site

doi:10.1111/jace.16485

CORC > 金属研究所 > 中国科学院金属研究所

	Triggering efficient photocatalytic water oxidation reactions over BaNbO2N by incorporating Ca at B site
	Wei, Shunhang 1,2,3; Jin, Shu 1; Pan, Guoxiang 2; Li, Zuxin 2; Liu, Gang 4,5; Xu, Xiaoxiang 1,2,3
刊名	JOURNAL OF THE AMERICAN CERAMIC SOCIETY
	2019-10-01
卷号	102 期号:10 页码:6194-6201
关键词	BaNbO2N Ca modification photocatalyst water oxidation water splitting
ISSN号	0002-7820
DOI	10.1111/jace.16485
通讯作者	Liu, Gang(gangliu@imr.ac.cn) ; Xu, Xiaoxiang(xxxu@tongji.edu.cn)
英文摘要	Although BaNbO2N has visible light absorption as far as 740 nm, its photocatalytic activity is generally very poor under ordinary conditions, being incommensurate to its light absorption properties. In this work, we introduce Ca into the B site of BaNbO2N to form a complex perovskite BaNb1-x/3Cax/3O2+yN1-y (0 <= x, y <= 1). The presence of Ca in BaNbO2N has great impact on a number of important properties such as band gap value, nitrogen content, surface hydrophilicity, and defects levels. In particular, defects such as Nb4+ species are effectively suppressed in Ca-modified BaNbO2N. More importantly, photocatalytic activity of BaNbO2N for water oxidation reactions is substantially improved after Ca modifications. Compared with pristine BaNbO2N, more than twofold enhancement in photocatalytic oxygen evolution is observed for BaNb0.8Ca0.2O2+yN1-y (x = 0.6). Such improvements probably stem from the suppression of Nb4+ species in the structure as well as enhanced surface hydrophilicity after Ca modification. The facile approach by incorporating alkaline earth cations into crystal structure can be well extended to other perovskite oxynitrides whose photocatalytic activity is subject to those defective species.
资助项目	Recruitment Program of Global Youth Experts (1000 plan) ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China[21401142] ; National Natural Science Foundation of China[51825204] ; Shanghai Science and Technology Commission[14DZ2261100]
WOS研究方向	Materials Science
语种	英语
出版者	WILEY
WOS记录号	WOS:000478649200048
资助机构	Recruitment Program of Global Youth Experts (1000 plan) ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; Shanghai Science and Technology Commission
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/134678]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, Gang; Xu, Xiaoxiang
作者单位	1.Tongji Univ, Putuo Peoples Hosp, Clin & Cent Lab, Shanghai, Peoples R China 2.Huzhou Univ, Sch Engn, Huzhou, Peoples R China 3.Tongji Univ, Sch Chem Sci & Engn, Shanghai Key Lab Chem Assessment & Sustainabil, Shanghai, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang, Liaoning, Peoples R China 5.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Wei, Shunhang,Jin, Shu,Pan, Guoxiang,et al. Triggering efficient photocatalytic water oxidation reactions over BaNbO2N by incorporating Ca at B site[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2019,102(10):6194-6201.
APA	Wei, Shunhang,Jin, Shu,Pan, Guoxiang,Li, Zuxin,Liu, Gang,&Xu, Xiaoxiang.(2019).Triggering efficient photocatalytic water oxidation reactions over BaNbO2N by incorporating Ca at B site.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,102(10),6194-6201.
MLA	Wei, Shunhang,et al."Triggering efficient photocatalytic water oxidation reactions over BaNbO2N by incorporating Ca at B site".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 102.10(2019):6194-6201.