MoS_2/TiO_2复合催化剂的制备及其在紫外光下的光催化制氢活性  

Preparation of MoS_2/TiO_2 Composite Catalyst and Its Photocatalytic Hydrogen Production Activity under UV Irradiation

作　　者：张驰[1,2] 吴志娇[2] 刘建军[1] 朴玲钰[2] 

机构地区：[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

出　　处：《物理化学学报》2017年第7期1492-1498,共7页Acta Physico-Chimica Sinica

基　　金：科技部重点研发计划项目(2016YFA0200900;2016YFF0203803)资助~~

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Mo S2纳米片,然后通过水热法在Mo S2纳米片上负载了TiO_2纳米颗粒,形成了Mo S2/TiO_2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1004μmol·h-1·g-1,对应的催化剂的Mo S2含量为30%,其催化速率远大于单一的Mo S2和TiO_2,表明Mo S2/TiO_2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Mo S2/TiO_2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。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 μmo1-1.h-1.g-1 was obtained. The catalytic rate is much greater than that obtained with MoS2 or mio2 catalysts. The high hydrogen production rate indicated that the use of a MoS2/mio2 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.

关 键 词：二氧化钛 二硫化钼 异质结 复合结构 光催化制氢 

分 类 号：O643.36[理学—物理化学] TQ116.2[理学—化学]