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Efficient photocatalytic hydrogen production over solid solutions Sr1-xBixTi1-xFexO3 (0 <= x <= 0.5)
Lu, Lingwei; Lv, Meilin; Wang, Di; Liu, Gang; Xu, Xiaoxiang; Xu, XX (reprint author), Tongji Univ, Dept Chem, Shanghai Key Lab Chem Assessment & Sustainabil, 1239 Siping Rd, Shanghai 200092, Peoples R China.
2017
发表期刊APPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
卷号200页码:412-419
摘要Constituting solid solutions for prototype perovskite compound SrTiO3 offers appealing means to tailor the optical and photocatalytic properties of this wide band gap semiconductor. Here we successfully synthesized a series of Sr1-xBixTi1-xFexO3 (0 <= x <= 0.5) solid solutions via hydrothermal method. Their crystal structures, surface nature and other physicochemical properties were systematically explored. Our results show that a large portion of BiFeO3 (up to 50%) can be incorporated into the structure SrTiO3 without symmetry degradation from cubic. A number of important factors such as microstructures, light absorbance and surface hydtophilicity are all strongly correlated with Bi/Fe content in the solid solutions. Photocatalytic performance was greatly improved after formation of solid solutions and high activity normally occurs in samples with large surface area, high crystallinity as well as absence of Bi (V) species. The highest activity belongs to sample Sr0.6Bi0.4Ti0.6Fe0.4O3 with photocatalytic hydrogen production rate similar to 50 mu mol/h under full range irradiation and similar to 5 mu mol/h under visible light irradiation, corresponding to apparent quantum efficiency similar to 0.63% and 0.11%, respectively. Theoretical calculation reveals the critical role of Fe in constituting spin-polarized bands inside the intrinsic band gap of SrTiO3, therefore is responsible for band gap reduction and visible light activities. This work highlights the benefits of forming solid solutions in the design and development of efficient photocatalysts. (C) 2016 Elsevier B.V. All rights reserved.; Constituting solid solutions for prototype perovskite compound SrTiO3 offers appealing means to tailor the optical and photocatalytic properties of this wide band gap semiconductor. Here we successfully synthesized a series of Sr1-xBixTi1-xFexO3 (0 <= x <= 0.5) solid solutions via hydrothermal method. Their crystal structures, surface nature and other physicochemical properties were systematically explored. Our results show that a large portion of BiFeO3 (up to 50%) can be incorporated into the structure SrTiO3 without symmetry degradation from cubic. A number of important factors such as microstructures, light absorbance and surface hydtophilicity are all strongly correlated with Bi/Fe content in the solid solutions. Photocatalytic performance was greatly improved after formation of solid solutions and high activity normally occurs in samples with large surface area, high crystallinity as well as absence of Bi (V) species. The highest activity belongs to sample Sr0.6Bi0.4Ti0.6Fe0.4O3 with photocatalytic hydrogen production rate similar to 50 mu mol/h under full range irradiation and similar to 5 mu mol/h under visible light irradiation, corresponding to apparent quantum efficiency similar to 0.63% and 0.11%, respectively. Theoretical calculation reveals the critical role of Fe in constituting spin-polarized bands inside the intrinsic band gap of SrTiO3, therefore is responsible for band gap reduction and visible light activities. This work highlights the benefits of forming solid solutions in the design and development of efficient photocatalysts. (C) 2016 Elsevier B.V. All rights reserved.
部门归属[lu, lingwei ; lv, meilin ; wang, di ; xu, xiaoxiang] tongji univ, dept chem, shanghai key lab chem assessment & sustainabil, 1239 siping rd, shanghai 200092, peoples r china ; [liu, gang] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
关键词Solid Solution Srtio3 Photocatalytst Water Splitting Dft Calculation
学科领域Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
资助者Young Scientists Fund of the National Natural Science Foundation of China [21401142]; Shanghai Science and Technology Commission [14DZ2261100]; Fundamental Research Funds for the Central Universities
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/321006/78387
专题中国科学院金属研究所
通讯作者Xu, XX (reprint author), Tongji Univ, Dept Chem, Shanghai Key Lab Chem Assessment & Sustainabil, 1239 Siping Rd, Shanghai 200092, Peoples R China.
推荐引用方式
GB/T 7714
Lu, Lingwei,Lv, Meilin,Wang, Di,et al. Efficient photocatalytic hydrogen production over solid solutions Sr1-xBixTi1-xFexO3 (0 <= x <= 0.5)[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2017,200:412-419.
APA Lu, Lingwei,Lv, Meilin,Wang, Di,Liu, Gang,Xu, Xiaoxiang,&Xu, XX .(2017).Efficient photocatalytic hydrogen production over solid solutions Sr1-xBixTi1-xFexO3 (0 <= x <= 0.5).APPLIED CATALYSIS B-ENVIRONMENTAL,200,412-419.
MLA Lu, Lingwei,et al."Efficient photocatalytic hydrogen production over solid solutions Sr1-xBixTi1-xFexO3 (0 <= x <= 0.5)".APPLIED CATALYSIS B-ENVIRONMENTAL 200(2017):412-419.
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