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过程工程学报 ›› 2018, Vol. 18 ›› Issue (4): 828-833.DOI: 10.12034/j.issn.1009-606X.217436

• 材料工程 • 上一篇    下一篇

La掺杂ZnO的制备及其光催化降解孔雀石绿

田志茗*, 王鑫月   

  1. 齐齐哈尔大学化学与化工学院,黑龙江 齐齐哈尔 161006
  • 收稿日期:2017-12-28 修回日期:2018-01-12 出版日期:2018-08-22 发布日期:2018-08-15
  • 通讯作者: 王鑫月 1594917000@qq.com
  • 基金资助:
    黑龙江省教育厅基本科研业务专项课题;齐齐哈尔市科学技术局项目

Synthesis of La-doped ZnO and its photocatalytic degradation to malachite green

Zhiming TIAN?, Xinyue WANG   

  1. College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, China
  • Received:2017-12-28 Revised:2018-01-12 Online:2018-08-22 Published:2018-08-15

摘要: 采用溶胶?凝胶法制备了不同La掺杂量的La/ZnO催化剂,分析了其组成和性质,以孔雀石绿溶液为染料模型,研究了催化剂的光催化降解性能. 结果表明,ZnO为六角纤锌矿结构,La3+以小La2O3簇的形式均匀分布在ZnO纳米颗粒上. 摩尔比La:Zn=0.05时La/ZnO具有良好的催化活性,用300 W汞灯照射2 h,孔雀石绿的降解率可达98.8%,300 W氙灯照射2 h降解率达90.4%,比ZnO的降解率提高了51.2%.

关键词: La掺杂ZnO, 光催化降解, 孔雀石绿

Abstract: La/ZnO catalysts with different La doping amounts were prepared by sol?gel method. The microstructures and properties of La/ZnO were characterized. Using malachite green solution as the dye model, the photocatalytic degradation of the catalyst was studied. The results indicated that ZnO was hexagonal wurtzite structure, and La3+ was uniformly distributed on the ZnO nanoparticles in the form of small La2O3 clusters. La/ZnO had good catalytic activity when the molar ratio of La:Zn=0.05. The degradation rate of malachite green reached 98.8% within 2 h under 300 W mercury lamp illumination. The degradation rate up to 90.4% under 300 W xenon lamp irradiation 2 h, increased by 51.2% than ZnO due to La doping.

Key words: La-doped ZnO, photocatalytic degradation, malachite green