【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)．更多还原

【Abstract】 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,crystal-lization temperature, extraction,and calcination temperature have been investigated. And the abilities of visi-ble light respondence of nano-InVO4 and anatase TiO2 have been compared. Results show that nano-lnVO4 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.更多还原