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Photocatalytic hydrogen production over solid solutions between BiFeO3 and SrTiO3
Lu, Lingwei; Lv, Meilin; 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
Source PublicationAPPLIED SURFACE SCIENCE
ISSN0169-4332
Volume391Pages:535-541
AbstractConstituting solid solutions has been an appealing means to gain control over various physicochemical properties. In this work, we synthesized a series of SrTiO3-BiFeO3 solid solutions and systematically explored their structural, optical and photocatalytic properties. Our results show that all solid solutions crystallize in a primitive cubic structure and their band gap values can be"easily tuned by adjusting molar ratios between SrTiO3 and BiFeO3. Photocatalytic hydrogen production under both full range and visible light irradiation is greatly improved after forming solid solutions. The highest hydrogen production rate obtained is 180 mol/h under full range irradiation (lambda >= 250 nm) and 4.2 p.molih under visible light irradiation (lambda >= 400 nm), corresponding to apparent quantum efficiency 2.28% and 0.10%, respectively. The activity is found to be strongly influenced by surface area and light absorption. Theoretical calculation suggests that Fe contributes to the formation of spin-polarized bands in the middle of original band gap and is responsible for the band gap reduction and visible light photocatalytic activity. (C) 2016 Elsevier B.V. All rights reserved.; Constituting solid solutions has been an appealing means to gain control over various physicochemical properties. In this work, we synthesized a series of SrTiO3-BiFeO3 solid solutions and systematically explored their structural, optical and photocatalytic properties. Our results show that all solid solutions crystallize in a primitive cubic structure and their band gap values can be"easily tuned by adjusting molar ratios between SrTiO3 and BiFeO3. Photocatalytic hydrogen production under both full range and visible light irradiation is greatly improved after forming solid solutions. The highest hydrogen production rate obtained is 180 mol/h under full range irradiation (lambda >= 250 nm) and 4.2 p.molih under visible light irradiation (lambda >= 400 nm), corresponding to apparent quantum efficiency 2.28% and 0.10%, respectively. The activity is found to be strongly influenced by surface area and light absorption. Theoretical calculation suggests that Fe contributes to the formation of spin-polarized bands in the middle of original band gap and is responsible for the band gap reduction and visible light photocatalytic activity. (C) 2016 Elsevier B.V. All rights reserved.
description.department[lu, lingwei ; lv, meilin ; 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
KeywordBifeo3 Srtio3 Photocatalyst Water Splitting Hydrogen Production
Subject AreaChemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78379
Collection中国科学院金属研究所
Corresponding AuthorXu, XX (reprint author), Tongji Univ, Dept Chem, Shanghai Key Lab Chem Assessment & Sustainabil, 1239 Siping Rd, Shanghai 200092, Peoples R China.
Recommended Citation
GB/T 7714
Lu, Lingwei,Lv, Meilin,Liu, Gang,et al. Photocatalytic hydrogen production over solid solutions between BiFeO3 and SrTiO3[J]. APPLIED SURFACE SCIENCE,2017,391:535-541.
APA Lu, Lingwei,Lv, Meilin,Liu, Gang,Xu, Xiaoxiang,&Xu, XX .(2017).Photocatalytic hydrogen production over solid solutions between BiFeO3 and SrTiO3.APPLIED SURFACE SCIENCE,391,535-541.
MLA Lu, Lingwei,et al."Photocatalytic hydrogen production over solid solutions between BiFeO3 and SrTiO3".APPLIED SURFACE SCIENCE 391(2017):535-541.
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