纳米InVO_4的合成及其光解水制氢性能研究  

Preparation of Nanosized Photocatalyst InVO_4 and Its Photocatalytic Activity for Water Decomposition

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

机构地区：[1]北京工业大学环境与能源工程学院,北京100022

出　　处：《北京工业大学学报》2007年第1期51-56,66,共7页Journal of Beijing University of Technology

基　　金：国家'九七三'计划资助项目(2003CB214500)

摘　　要：为提高光催化分解H2O制H2的效率,采用模板剂导向自组装法合成了具有较大比表面积的纳米InVO4．光催化剂,通过XRD、TEM、SEM、BET、UV-Vis等表征手段对样品的晶相组成、形貌、比表面积和吸光性进行表征．讨论了无机源与模板剂用量比、pH值、晶化温度、溶剂萃取和煅烧温度对样品结构的影响,并比较了纳米InVO4与锐钛型TiO2,的可见光响应性能．结果表明,通过改变无机源与模板剂的摩尔比或控制煅烧温度,可选择性地合成不同晶型的纳米InVO4光催化剂,其在可见光区的吸光性能比锐钛型TiO2有较大改进,在紫外光激发下的光解H2O制H2性能与固相烧结法所得InVO4相比有较大提高,产H2速率约为16.6 mmol/(h·g)．To improve the efficiency of photocatalytic water decomposition, nanosized photocatalyst InVO4 was synthesized by template-directing self-assembling method. The crystal structures, morphologies, surface areas, and photon absorption of the synthesized InVO4 were characterized by means of XRD, TEM, SEM, BET, and UV-vis techniques, respectively. The effects of precursor-to-template mol ratio, pH value, crystallization temperature, extraction, and calcination temperature have been investigated. And the abilities of visible light respondence of nano-InVO4 and anatase TiO2 have been compared. Results show that nano-InVO4 with different crystal structures can be selectively obtained by changing the precursor-to-template ratio in the starting materials or by changing the calcination temperature. The ability of visible light respondence of nano- InVO4 is greatly improved than that of antase TiO2, and it can evolve hydrogen from water in a rate of 16.6 mmol/（g·h） under UV light irradiation, which is far better than InVO4 synthesized by solid-state method.

关 键 词：纳米材料 合成 光催化 H2O 分解 H2 

分 类 号：O069[理学]