水热法制备ZnTiO3/TiO2复合光催化剂及其光催化性能研究
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O657.32

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The synthesis of ZnTiO3/TiO2 composite photocatalysts and their photocatalytic performances
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    摘要:

    本文以层状钛酸盐K2Ti4O9为前驱体,将其通过质子交换和插层反应剥离成[Ti4O9]2ˉ纳米片,然后用3 mol/L HCl溶液和3 mol/L NaOH溶液将其调节成设定pH,再向上述溶液中加入一定质量的六次甲基四胺和锌盐,在水热条件下制备出高催化活性的ZnTiO3/TiO2复合光催化剂. 通过X-射线粉末衍射仪(XRD)和扫描电镜(SEM)表征了其结构和形貌,并在光照条件下,对不同条件下所制备的ZnTiO3/TiO2复合光催化剂进行了光催化降解亚甲基蓝性能研究. 研究结果表明,在pH = 7.0条件下制备的ZnTiO3/TiO2复合光催化剂展示了较高的光催化性能.

    Abstract:

    The ZnTiO3/TiO2 composite photocatalysts with high photocatalytic activity were synthesized by hydrothermal treatment of the [Ti4O9]2ˉ nanosheets after it was adjusted to a desired pH value with a 3 mol/L HCl solution and a 3 mol/L NaOH solution in the present of hexamethylenetetramine and Zn(NO3)2. The [Ti4O9]2ˉ nanosheets were prepared by using the layered tetratitanate K2Ti4O9 as the processor. First, the K2Ti4O9 sample was converted into a protonic tetratitanate H2Ti4O9 by exchanging K+ of K2Ti4O9. And then the H2Ti4O9 was mixed with the triethanolamine (TEAOH) to obtain the TEA+-intercalated tetratitanate compound. Finally, the TEA+-intercalated tetratitanate compound was dispersed in massive amounts of distilled water to obtain the [Ti4O9]2ˉ nanosheets. The structures and morphologies of the ZnTiO3/TiO2 composite photocatalysts were investigated by using X-ray diffraction (XRD) and scanning electron diffraction microscopy (SEM). Furthermore, the photocatalytic activities of the synthesized ZnTiO3/TiO2 composite photocatalysts were also characterized. The experimental results revealed that the ZnTiO3/TiO2 composite photocatalyst obtained at the value of pH = 7.0 exhibits the higher photocatalytic activity.

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引用本文格式: 刘冷,杜意恩,李军,刘毓芳,蔡雪梅,陈勇强. 水热法制备ZnTiO3/TiO2复合光催化剂及其光催化性能研究[J]. 四川大学学报: 自然科学版, 2018, 55: 827.

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  • 收稿日期:2017-11-15
  • 最后修改日期:2017-12-04
  • 录用日期:2017-12-20
  • 在线发布日期: 2018-07-03
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