Ga4B2O9: An Efficient Borate Photocatalyst for Overall Water Splitting   without Cocatalyst

doi:10.1021/ic5031087

CORC > 北京大学 > 化学与分子工程学院

	Ga4B2O9: An Efficient Borate Photocatalyst for Overall Water Splitting without Cocatalyst
	Wang, Guangjia ; Jing, Yan ; Ju, Jing ; Yang, Dingfeng ; Yang, Jia ; Gao, Wenliang ; Cong, Rihong ; Yang, Tao
刊名	inorganic chemistry
	2015
关键词	OPTICAL-PROPERTIES NANOCRYSTALS HYDROGEN
DOI	10.1021/ic5031087
英文摘要	Borates are well-known candidates for optical materials, but their potentials in photocatalysis are rarely studied. Ga3+-containing oxides or sulfides are good candidates for photocatalysis applications because the unoccupied 4s orbitals of Ga usually contribute to the bottom of the conducting band. It is therefore anticipated that Ga4B2O9 might be a promising photocatalyst because of its high Ga/B ratio and three-dimensional network. Various synthetic methods, including hydrothermal (BY), sol gel (SG), and high-temperature solid-state reaction (HTSSR), were employed to prepare crystalline Ga4B2O9. The so-obtained HY-Ga4B2O9 are micrometer single crystals but do not show any UV-light activity unless modified by Pt loading. The problem is the fast recombination of photoexcitons. Interestingly, the samples obtained by SG and HTSSR methods both possess a fine micromorphology composed of well-crystalline nanometer strips. Therefore, the excited e(-) and h(+) can move to the surface easily. Both samples exhibit excellent intrinsic UV-light activities for pure water splitting without the assistance of any cocatalyst (47 and 118 mu mol/h/g for H-2 evolution and 22 and 58 mu mol/h/g for O-2 evolution, respectively), while there is no detectable activity for P25 (nanoparticles of TiO2 with a specific surface area of 69 m(2)/g) under the same conditions.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000351325200049&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Inorganic & Nuclear; SCI(E); 10; ARTICLE; congrihong@cqu.edu.cn; taoyang@cqu.edu.cn; 6; 2945-2949; 54
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/206063]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Wang, Guangjia,Jing, Yan,Ju, Jing,et al. Ga4B2O9: An Efficient Borate Photocatalyst for Overall Water Splitting without Cocatalyst[J]. inorganic chemistry,2015.
APA	Wang, Guangjia.,Jing, Yan.,Ju, Jing.,Yang, Dingfeng.,Yang, Jia.,...&Yang, Tao.(2015).Ga4B2O9: An Efficient Borate Photocatalyst for Overall Water Splitting without Cocatalyst.inorganic chemistry.
MLA	Wang, Guangjia,et al."Ga4B2O9: An Efficient Borate Photocatalyst for Overall Water Splitting without Cocatalyst".inorganic chemistry (2015).