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Bismuth and chromium co-doped strontium titanates and their photocatalytic properties under visible light irradiation
Lv, Meilin; Xie, Yinghao; Wang, Yawei; Sun, Xiaoqin; Wu, Fangfang; Chen, Hongmei; Wang, Shuwei; Shen, Cai; Chen, Zuofeng; Ni, Shuang; Liu, Gang; Xu, Xiaoxiang; xxxu@tongji.edu.cn
2015
Source PublicationPHYSICAL CHEMISTRY CHEMICAL PHYSICS
ISSN1463-9076
Volume17Issue:39Pages:26320-26329
AbstractModification of prototype perovskite compound SrTiO3 by introducing foreign elements has been an appealing means to endow this wide band gap semiconductor with visible light responses. Here we systematically investigated a series of Sr1-xBixTi1-x,CrxO3 solid solution compounds prepared by two different synthetic routes, namely, solid state reactions and the hydrothermal method. Their crystal structures as well as other physicochemical properties were explored. Our results showed that a number of important factors such as microstructures, crystallinity, light absorbance and surface compositions etc. are all strongly correlated with the synthetic methods used. The hydrothermal method is generally helpful for morphology controls as well as avoiding Cr6+ defects and Sr segregation at the surface, thereby contributing to a high photocatalytic activity. Better performance normally occurs in samples with a high crystallinity and free of defects like Bi5+. Theoretical calculations suggest that Cr plays an important role in band gap reduction and photocatalytic reactions, while Bi only acts as a constituent cation for the perovskite structure and does not significantly alter the electronic structures near the Fermi level. Our findings have revealed how synthetic routes are relevant to the final photocatalytic properties of a compound, and therefore comparisons among various photocatalysts have to include concerns about their preparation history.
description.department[lv, meilin ; xie, yinghao ; wang, yawei ; sun, xiaoqin ; wu, fangfang ; chen, hongmei ; chen, zuofeng ; xu, xiaoxiang] tongji univ, dept chem, shanghai key lab chem assessment & sustainabil, shanghai 200092, peoples r china ; [wang, shuwei ; shen, cai] chinese acad sci, ningbo inst mat technol & engn, ningbo, zhejiang, peoples r china ; [ni, shuang] china acad engn phys, laser fus res ctr, sci & technol plasma phys lab, mianyang 621900, peoples r china ; [liu, gang] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china
Funding OrganizationNational Natural Science Foundation of China [21401142]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74654
Collection中国科学院金属研究所
Corresponding Authorxxxu@tongji.edu.cn
Recommended Citation
GB/T 7714
Lv, Meilin,Xie, Yinghao,Wang, Yawei,et al. Bismuth and chromium co-doped strontium titanates and their photocatalytic properties under visible light irradiation[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2015,17(39):26320-26329.
APA Lv, Meilin.,Xie, Yinghao.,Wang, Yawei.,Sun, Xiaoqin.,Wu, Fangfang.,...&xxxu@tongji.edu.cn.(2015).Bismuth and chromium co-doped strontium titanates and their photocatalytic properties under visible light irradiation.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,17(39),26320-26329.
MLA Lv, Meilin,et al."Bismuth and chromium co-doped strontium titanates and their photocatalytic properties under visible light irradiation".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 17.39(2015):26320-26329.
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