高效可见光光催化分解水制氢催化剂InVO_4/CNTs  

Highly Efficient Photocatalyst InVO_4/CNTs for Water Decomposition to Produce Hydrogen under Visible Light Irradiation

作　　者：胥利先[1] 马重芳[1] 桑丽霞[1] 李群伟[1] 戴洪兴[2] 何洪[2] 

机构地区：[1]北京工业大学环境与能源工程学院传热强化与过程节能教育部重点实验室,北京100022 [2]北京工业大学环境与能源工程学院化学化工系,北京100022

出　　处：《催化学报》2007年第12期1083-1088,共6页

基　　金：国家重点基础研究发展计划(973计划;2003CB214500)

摘　　要：以十六烷基三甲基溴化铵(CTAB)为模板剂,碳纳米管(CNTs)为载体,采用醇热合成法制备了InVO4/CNTs光催化剂,利用透射电镜、高分辨扫描电镜、X射线衍射、N2吸附和紫外-可见光谱等技术对样品的表面形貌、晶相组成、比表面积和吸光性等物理性质进行了表征,并考察了其在可见光(以300W氙灯为光源)照射下分解水制氢的催化活性.结果表明,InVO4纳米粒子在CNTs表面分布均匀,粒径约为10nm,比表面积为102m2/g.与体相InVO4相比,InVO4/CNTs在可见光区(λ>420nm)的吸光性能有显著改善,在氙灯激发下催化活性很高,在纯水及20%甲醇水溶液中光催化反应4h,平均产氢速率分别为156和217μmol/(g.h).InVO4/CNTs的高可见光光催化活性与碳纳米管载体的电子特性有关.The InVO4/CNTs photocatalyst was prepared by the ethanol thermal method using cetyltrimethylammonium bromide （CTAB） as the template and carbon nanotubes （CNTs） as the support. The morphology, crystal structure, surface area, and photon absorption properties of the synthesized InVO4/CNTs were characterized by transmission electron microscopy, high-resolution scanning electron microscopy, X-ray diffraction, N2 adsorption, and UV-Vis spectroscopy. The water decomposition photoactivity of the catalyst was investigated using a 300 W Xe lamp as light source. The results show that InVO4 particles are homogeneously dispersed on the surface of CNTs. The particle size is about 10 nm, and the surface area of InVO4/CNTs reaches 102 m^2/g. The visible light （λ 〉420 nm） response of InVO4/CNTs is greatly improved as compared with the bulk InVO4. The average H2 evolution rates from pure H20 and 20% aqueous methanol solution within 4 h are 156 and 217/μmol/（g·h）, respectively, under Xe lamp irradiation. The high photocatalytic activity of InVO4/ CNTs is related to the electronic properties of the CNTs support.

关 键 词：碳纳米管 钒酸铟 光催化 水分解 氢气 可见光 

分 类 号：O643.36[理学—物理化学]