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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
ISSN1477-9226
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
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.
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