高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (6): 1345-1351.doi: 10.7503/cjcu20190644

• 物理化学 • 上一篇    下一篇

La掺杂钛酸钙光催化剂在可见光下分解水制氢的影响因素

成荣敏1,徐虹2,单瑞平2,詹从红1,*()   

  1. 1. 吉林大学化学学院, 长春 130012
    2. 吉林大学材料科学与工程学院, 长春 130022
  • 收稿日期:2019-12-10 出版日期:2020-06-10 发布日期:2020-04-15
  • 通讯作者: 詹从红 E-mail:zhanch@jlu.edu.cn
  • 基金资助:
    吉林省自然科学基金(20170101103JC)

Influential Factors of La-doped Calcium Titanate for Photocatalytic H2 Evolution Under Visible Light

CHENG Rongmin1,XU Hong2,SHAN Ruiping2,ZHAN Conghong1,*()   

  1. 1. College of Chemistry, Jilin University, Changchun 130012, China
    2. College of Materials Science and Engineering, Jilin University, Changchun 130022, China
  • Received:2019-12-10 Online:2020-06-10 Published:2020-04-15
  • Contact: Conghong ZHAN E-mail:zhanch@jlu.edu.cn
  • Supported by:
    † Natural Science Foundation of Jilin Province, China(20170101103JC)

摘要:

以柠檬酸为络合剂, 采用溶胶-凝胶法制备了钙钛矿型光催化剂Ca0.99La0.01TiO3, 利用X射线衍射仪(XRD)、 扫描电子显微镜(SEM)、 紫外-可见漫反射光谱仪(UV-Vis DRS)等对光催化剂材料进行了表征, 并考察了N掺杂对光催化剂催化效果的影响, 探究了可见光条件下, Ca0.99La0.01TiO3-xNx在不同Pt负载量及不同种类牺牲剂中光催化分解水的产氢量, 并进行相关荧光猝灭分析. 结果表明, 在可见光条件下, Pt负载量为1%且掺杂N的钙钛矿光催化剂在Na2SO3/Na2S作为牺牲剂时, 光催化分解水的产氢量最高.

关键词: 光催化, 钙钛矿, 铂负载, 牺牲剂

Abstract:

For photocatalytic H 2 evolution from water splitting, perovskite photocatalyst Ca 0.99La 0.01TiO 3 was prepared by sol-gel method with citric acid as complexing agent. The influence of N doping on photocatalytic activity was investigated. The hydrogen-producing capacity of Ca 0.99La 0.01TiO 3- xN x with different Pt loading and different kinds of sacrificial agents was also investigated under visible light irradiation. The photocatalytic materials were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), UV-Vis diffuse reflectance spectroscopy(UV-Vis DRS). The results show that under the irradiation of visible light, the perovskite photocatalyst Pt-Ca 0.99La 0.01TiO 3- xN x with 1% Pt-loading has the highest photocatalytic activity of hydrogen production from water when Na 2SO 3/Na 2S is used as the sacrificial agent. Pt-loading promotes photocatalytic reaction and improves photocatalytic activity.

Key words: Photocatalysis, Perovskite, Pt-loading, Sacrificial agent

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