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Triggering efficient photocatalytic water oxidation reactions over BaNbO2N by incorporating Ca at B site
Wei, Shunhang; Jin, Shu; Pan, Guoxiang; Li, Zuxin; Liu, Gang; Xu, Xiaoxiang
2019-10-01
Source PublicationJOURNAL OF THE AMERICAN CERAMIC SOCIETY
ISSN0002-7820
Volume102Issue:10Pages:6194-6201
AbstractAlthough 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.
KeywordBaNbO2N Ca modification photocatalyst water oxidation water splitting
Indexed BySCI
Language英语
WOS IDWOS:000478649200048
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80748
Collection中国科学院金属研究所
Recommended Citation
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.
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