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材料工程  2018, Vol. 46 Issue (11): 57-62    DOI: 10.11868/j.issn.1001-4381.2017.000939
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
La掺杂改性Bi2WO6纳米材料的制备及其光催化性能
张相辉
洛阳师范学院 物理与电子信息学院 河南省电磁变换与探测重点实验室, 河南 洛阳 471934
Preparation and Photocatalytic Properties of La Doped Bi2WO6 Nanomaterials
ZHANG Xiang-hui
Henan Key Laboratory of Electromagnetic Transformation and Detection, College of Physics and Electronic Information, Luoyang Normal University, Luoyang 471934, Henan, China
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摘要 采用一步水热法以Bi(NO33·5H2O,Na2WO4·2H2O和La(NO33·6H2O为原料制备了La掺杂Bi2WO6纳米材料。通过X射线粉末衍射仪(XRD)、紫外-可见分光光度计(UV-Vis)、比表面积测试仪(BET)对所制备的材料的物相组成和光化学性能进行了系统表征。XRD结果表明La成功地掺入Bi2WO6晶格中,并且仍然具有斜方相结构。UV-Vis测试结果显示,Bi2WO6的吸收边随着La掺杂量的增加不断红移,说明La掺杂可以有效拓宽材料的吸光范围。BET结果则表明,随着La掺杂量的增加,样品的比表面积有所增大。此外,以亚甲基蓝(MB)为目标污染物研究La掺杂对样品的光催化活性的影响,结果表明,2.0%的La元素掺杂Bi2WO6光催化剂的催化性能最好,经过120min反应后,MB的降解率达到91%。
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张相辉
关键词 La掺杂Bi2WO6水热法光催化性能    
Abstract:La doped Bi2WO6 nanomaterials were synthesized by one step hydrothermal method using Bi(NO3)3·5H2O, Na2WO4·2H2O and La(NO3)3·6H2O as the raw materials. The phase composition and optical property of the as-prepared materials were systematically characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy and BET surface area. XRD result reveals that La is doped in Bi2WO6 successfully, and the prepared samples still possess orthorhombic structure. UV-Vis study shows the absorption edge of the prepared samples has a red-shift with the increase of La doping, indicating that La doping can broaden the absorbance range of the La doped Bi2WO6 materials. BET measurement shows that the specific surface area of La doped Bi2WO6 materials is increased with more La doping. In addition, the effect of La doping on the photocatalytic activities of the samples were measured by the degradation of methylene blue (MB). Results show that the best photocatalytic property is found in the 2.0% La doped Bi2WO6 nanomaterial; after 120min of reaction, the degradation rate of MB reaches 91%.
Key wordsLa doping    Bi2WO6    hydrothermal method    photocatalytic property
收稿日期: 2017-07-21      出版日期: 2018-11-19
中图分类号:  O643  
基金资助: 
通讯作者: 张相辉(1983-),男,副教授,博士,研究方向:太阳能光催化,联系地址:河南省洛阳市伊滨区吉庆路6号洛阳师范学院物理与电子信息学院(471934),E-mail:zxhlynu@163.com     E-mail: zxhlynu@163.com
引用本文:   
张相辉. La掺杂改性Bi2WO6纳米材料的制备及其光催化性能[J]. 材料工程, 2018, 46(11): 57-62.
ZHANG Xiang-hui. Preparation and Photocatalytic Properties of La Doped Bi2WO6 Nanomaterials. Journal of Materials Engineering, 2018, 46(11): 57-62.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2017.000939      或      http://jme.biam.ac.cn/CN/Y2018/V46/I11/57
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