Synthesis of BaTaO2N oxynitride from Ba-rich oxide precursor for construction of visible-light-driven Z-scheme overall water splitting

IMR OpenIR

	Synthesis of BaTaO2N oxynitride from Ba-rich oxide precursor for construction of visible-light-driven Z-scheme overall water splitting
	Dong, Beibei; Qi, Yu; Cui, Junyan; Liu, Baodan; Xiong, Fengqiang; Jiang, Xin; Li, Zheng; Xiao, Yejun; Zhang, Fuxiang; Li, Can; Zhang, FX; Li, C (reprint author), Chinese Acad Sci, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, iChEM,Dalian Inst Chem Phys, Dalian 116023, Peoples R China.
	2017-08-28
发表期刊	ROYAL SOC CHEMISTRY
ISSN	1477-9226
卷号	46 期号:32 页码:10707-10713
摘要	Barium tantalum oxynitride (BaTaO2N) with an absorption edge of ca. 660 nm is one of the most promising photocatalysts for solar water splitting, and is usually synthesized by nitriding a mixture of Ba and Tacontaining compounds with a Ba/Ta molar ratio of unity under ammonia flow at high temperature, usually causing a high density of defect sites. Herein, we introduce a novel synthesis method for BaTaO2N (BTON) by employing Ba-rich LiBa4Ta3O12, prepared by a flux method, as a precursor of nitridation. As a comparison, BaTaOx was prepared by conventional solid state reaction and used as the precursor. The as-nitrided samples were correspondingly denoted as BTON-Flux and BTON-SSR. It was found that well-crystallized BTON oxynitride can be similarly obtained by both methods, but the BTON-Flux sample exhibits significantly decreased defect density and enhanced surface area relative to the BTON-SSR sample. As a result of their structural differences, the photocatalytic water splitting performance of the BTON-Flux sample, regardless of the H-2-evolving half reaction in the presence of methanol or Z-scheme overall water splitting, is much better than that of BTON-SSR. This study may open up a novel strategy for preparing oxynitride photocatalyst with decreased defect density for the promotion of solar water splitting.; Barium tantalum oxynitride (BaTaO2N) with an absorption edge of ca. 660 nm is one of the most promising photocatalysts for solar water splitting, and is usually synthesized by nitriding a mixture of Ba and Tacontaining compounds with a Ba/Ta molar ratio of unity under ammonia flow at high temperature, usually causing a high density of defect sites. Herein, we introduce a novel synthesis method for BaTaO2N (BTON) by employing Ba-rich LiBa4Ta3O12, prepared by a flux method, as a precursor of nitridation. As a comparison, BaTaOx was prepared by conventional solid state reaction and used as the precursor. The as-nitrided samples were correspondingly denoted as BTON-Flux and BTON-SSR. It was found that well-crystallized BTON oxynitride can be similarly obtained by both methods, but the BTON-Flux sample exhibits significantly decreased defect density and enhanced surface area relative to the BTON-SSR sample. As a result of their structural differences, the photocatalytic water splitting performance of the BTON-Flux sample, regardless of the H-2-evolving half reaction in the presence of methanol or Z-scheme overall water splitting, is much better than that of BTON-SSR. This study may open up a novel strategy for preparing oxynitride photocatalyst with decreased defect density for the promotion of solar water splitting.
部门归属	[dong, beibei ; qi, yu ; cui, junyan ; xiong, fengqiang ; li, zheng ; xiao, yejun ; zhang, fuxiang ; li, can] chinese acad sci, dalian natl lab clean energy, state key lab catalysis, ichem,dalian inst chem phys, dalian 116023, peoples r china ; [dong, beibei ; qi, yu ; li, zheng ; xiao, yejun] univ chinese acad sci, beijing 100049, peoples r china ; [cui, junyan] jilin univ, coll chem, key lab surface & interface chem jilin prov, changchun 130021, jilin, peoples r china ; [liu, baodan] chinese acad sci, inst met res, shenyang natl lab mat sci synl, 72 wenhua rd, shenyang 110016, liaoning, peoples r china
学科领域	Chemistry, Inorganic & Nuclear
资助者	Basic Research Program of China (973 Program) [2014CB239403]; National Natural Science Foundation of China [21633009, 21373210, 21522306]; "Hundred Talents Program" of Chinese Academy of Sciences
收录类别	SCI
语种	英语
WOS记录号	WOS:000408696500026
引用统计	被引频次：45[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/321006/79137
专题	中国科学院金属研究所
通讯作者	Zhang, FX; Li, C (reprint author), Chinese Acad Sci, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, iChEM,Dalian Inst Chem Phys, Dalian 116023, Peoples R China.
推荐引用方式 GB/T 7714	Dong, Beibei,Qi, Yu,Cui, Junyan,et al. Synthesis of BaTaO2N oxynitride from Ba-rich oxide precursor for construction of visible-light-driven Z-scheme overall water splitting[J]. ROYAL SOC CHEMISTRY,2017,46(32):10707-10713.
APA	Dong, Beibei.,Qi, Yu.,Cui, Junyan.,Liu, Baodan.,Xiong, Fengqiang.,...&Li, C .(2017).Synthesis of BaTaO2N oxynitride from Ba-rich oxide precursor for construction of visible-light-driven Z-scheme overall water splitting.ROYAL SOC CHEMISTRY,46(32),10707-10713.
MLA	Dong, Beibei,et al."Synthesis of BaTaO2N oxynitride from Ba-rich oxide precursor for construction of visible-light-driven Z-scheme overall water splitting".ROYAL SOC CHEMISTRY 46.32(2017):10707-10713.