物理化学学报 >> 2017, Vol. 33 >> Issue (7): 1492-1498.doi: 10.3866/PKU.WHXB201704141

论文 上一篇    

MoS2/TiO2复合催化剂的制备及其在紫外光下的光催化制氢活性

张驰1,2,吴志娇2,刘建军1,*(),朴玲钰2,*()   

  1. 1 北京化工大学化工资源有效利用国家重点实验室,北京100029
    2 中科院标准与检测重点实验室,中科院纳米科学卓越创新中心,国家纳米科学中心,北京100190
  • 收稿日期:2017-01-16 发布日期:2017-05-31
  • 通讯作者: 刘建军,朴玲钰 E-mail:13611012376@163.com; ljj-717@163.com;piaoly@nanoctr.cn
  • 基金资助:
    科技部重点研发计划项目(2016YFA0200900);科技部重点研发计划项目(2016YFF0203803)

Preparation of MoS2/TiO2 Composite Catalyst and Its Photocatalytic Hydrogen Production Activity under UV Irradiation

Chi ZHANG1,2,Zhi-Jiao WU2,Jian-Jun LIU1,*(),Ling-Yu PIAO2,*()   

  1. 1 State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
    2 CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
  • Received:2017-01-16 Published:2017-05-31
  • Contact: Jian-Jun LIU,Ling-Yu PIAO E-mail:13611012376@163.com; ljj-717@163.com;piaoly@nanoctr.cn
  • Supported by:
    the Ministry of Science and Technology of China(2016YFA0200900);the Ministry of Science and Technology of China(2016YFF0203803)

摘要:

为了研究复合光催化剂在光催化中的制氢效率,采用水热法制备了MoS2纳米片,然后通过水热法在MoS2纳米片上负载了TiO2纳米颗粒,形成了MoS2/TiO2异质结复合催化剂。采用冷场发射扫描电子显微镜(FE-SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、紫外-可见吸收光谱(UV-Vis)、拉曼光谱(Raman),X射线光电子能谱(XPS)对材料的结构和光学性能表征并进行分析。通过光催化制氢测试对光催化剂进行评价,实验结果表明,在波长为365 nm的紫外光照射下,最高光催化制氢速率为1004 μmol·h-1·g-1,对应的催化剂的MoS2含量为30%,其催化速率远大于单一的MoS2和TiO2,表明MoS2/TiO2复合催化剂在紫外光照下能显著提高光催化产氢性能。基于MoS2/TiO2复合光催化剂优越的光催化产氢性能,本文对复合光催化剂的产氢机理做了研究和分析。

关键词: 二氧化钛, 二硫化钼, 异质结, 复合结构, 光催化制氢

Abstract:

To study the activity of a composite photocatalyst for photocatalytic hydrogen production, we prepared and loaded MoS2 nanosheets with TiO2 nanoparticles using a hydrothermal method, thus forming a MoS2/TiO2 heterojunction composite catalyst. The structural and optical properties of the catalyst were characterized and analyzed by field-emission scanning electron microscopy, high-resolution transmission electron microscopy, X-ray powder diffraction, UV-Vis absorption spectra, Raman spectroscopy, and X-ray photoelectron spectroscopy. The activity of the photocatalyst was evaluated by its photocatalytic hydrogen production rate. The corresponding MoS2 content of the catalyst was found to be 30%, and upon the exposure to 365nm UV light, a high photocatalytic hydrogen production rate of 1004 μmol-1·h-1·g-1 was obtained. The catalytic rate is much greater than that obtained with MoS2 or TiO2 catalysts. The high hydrogen production rate indicated that the use of a MoS2/TiO2 composite catalyst can significantly improve the UV-induced photocatalytic hydrogen production performance. Because of the excellent photocatalytic hydrogen production performance of the MoS2/TiO2 composite, we studied and analyzed the hydrogen production mechanism.

Key words: TiO2, MoS2, Composite structure, Heterojunction, Photocatalytic hydrogen production

MSC2000: 

  • O649