| 纤维状TiO2／Bi2O3光催化剂的制备及其光催化性能 |
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| 引用本文： | 马占营,邓玲娟,李小博,范广.纤维状TiO2／Bi2O3光催化剂的制备及其光催化性能[J].化学物理学报(中文版),2014(4):439-444. |
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| 作者姓名： | 马占营 邓玲娟 李小博 范广 |
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| 作者单位： | 咸阳师范学院化学与化工学院,咸阳712000 |
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| 基金项目： | V. ACKNOWLEDGEMENTS This work was supported by the Scientific Research Program Funded by Shaanxi Provincial Education Department （No.2013JK0690）, and the Shaanxi Province Natural Science Foundation （No.2013JM2013）, the National Natural Science Foundation of China （No.21203160）, and the Special Research Fund of Xianyang Normal University （No. 11XSYK204）. |
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| 摘 要： | 研究了SrCo0．7Fe0．2Mo0．103-δ（SCFM）材料的相组成、微观结构、热膨胀系数、氧渗透性能和化学稳定性，其结果和文献中的SrCo0．8Fe0.2O3-δ（SCF）做了对比．通过EDTA-citric混合方法成功获得了纯相SCFM材料．SCFM材料在500-1050℃显示出比SCF材料更低的热膨胀系数（24×10^-6-29×10^-6／K），表明其具有一种更稳定的结构，尽管由于Mo掺杂造成其透氧率比SCF材料低，但是SCFM的透氧率仍然维持在一个较高水平．证实SCF中的Mo掺杂能够阻止晶格中的有序-无序转变，提高了其在CO2下的化学稳定性．
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| 关 键 词： | 氧渗透 SrCo0 8Fe0 2O3—δ 化学稳定性 钼 |
Preparation of TiO2/Bi2O3 Microfibers and Their Photocatalytic Activity |
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| Zhan-ying Ma,Ling-juan Deng,Xiao-bo Li,Guang Fan.Preparation of TiO2/Bi2O3 Microfibers and Their Photocatalytic Activity[J].化学物理学报(中文版),2014(4):439-444. |
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| Authors: | Zhan-ying Ma Ling-juan Deng Xiao-bo Li Guang Fan |
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| Institution: | ( College of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang 722000, China) |
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| Abstract: | A series of TiO2/Bi2O3 heterojunction microfibers have been fabricated using cotton fibers as bio-templates, and characterized by XRD, SEM and UV-Vis techniques. Results reveal that Bi2O3 in the TiO2/Bi2O3 sample is assigned to monoclinic and tetragonal mix-crystal phase. Fibers lengths can reach several micrometers and diameters range from 0.5 μm to 3 μm. Compared with pure TiO2 and Bi2O3, TiO2/Bi2O3 samples display better absorption in visible light region. Photocatalytic activity was evaluated by degradation of MB under visible light irradiation. TiO2/Bi2O3 microfibers exhibite much higher activity than pure TiO2 and Bi2O3, and 22.84%TiO2/Bi2O3 can achieve the decomposition of about 95%MB, which is attributed to synergistic effects of the strong visible-light absorption of TiO2/Bi2O3 microfibers and the heterojunction formed between TiO2 and Bi2O3. |
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| Keywords: | TiO2/Bi2O3 microfiber Visible light Heterojunction Photocatalysis |
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