东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (9): 1296-1299+1317.DOI: -

• 论著 • 上一篇    下一篇

焙烧温度对钛酸钙光催化性能的影响

杨合;韩冲;薛向欣;   

  1. 东北大学材料与冶金学院;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2010-09-15 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50874029);;

Effect of baking temperature on photocatalytic properties of calcium titanate

Yang, He (1); Han, Chong (1); Xue, Xiang-Xin (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-09-15 Published:2013-06-20
  • Contact: Han, C.
  • About author:-
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摘要： 以CaCO3和TiO2为原料,分别在1 100,1 200,1 300,1 400,1 500℃条件下进行焙烧.应用XRD,SEM,FT-IR,UV-vis对处理后的物料进行表征.实验结果表明,1 400℃以上能够合成出纯CaTiO3;随着温度提高,颗粒微观形貌从不规则多边形向光滑曲面形变化,团聚现象趋于明显;CaTiO3和TiO2含量不同导致催化剂在紫外-可见光区域光吸收能力有较大不同.在光催化性能评价实验中,随着温度提高,亚甲基蓝降解率和降解速率均降低,反应速率常数降低幅度达50%;钛酸钙降解亚甲基蓝溶液比较符合一级反应动力学特征.

关键词: 光催化性能, 动力学特征, 钛酸钙, 亚甲基蓝, 焙烧温度

Abstract: With CaCO3 and TiO2 as raw materials, they were separately baked at 1100, 1200, 1300, 1400 and 1500°C, and then characterized by XRD, SEM, FT-IR, UV-vis. The results showed that the high-purity CaTiO3 can be synthesized above 1400°C. With the temperature increasing, the micro morphology of synthesized CaTiO3 surface changes from irregularly polygonal to smooth, and the agglomeration of particles tends to be apparent. The different contents of CaTiO3 and TiO2 lead the absorbance of catalyst to be greatly different in UV-visible region. As the experimental results of photocatalytic performance evaluation, the degradation rate and efficiency of methylene blue both decrease with temperature increasing, and the reaction rate constant decreases by 50%. The degradation of the methylene blue with calcium titanate is comparatively in line with the characteristics of first-order reaction kinetics.

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