新型等离子光催化剂纳米金-钛酸锌复合物的制备与光解水制氢性能  

Synthesis and Properties of Nano Gold-Zinc Titanate Composite as a Novel Visible-light Plasmonic Photocatalysts for Solar Hydrogen Evolution

作　　者：史建建[1] 刘小明[1] 唐星华[1] 李帅龙 

机构地区：[1]南昌航空大学环境与化学工程学院,南昌330063

出　　处：《应用化学》2016年第5期583-590,共8页Chinese Journal of Applied Chemistry

基　　金：江西省自然科学基金(20152ACB20011)资助~~

摘　　要：利用溶胶-凝胶法及光沉积法制备纳米金-钛酸锌（Nano Au-Zn Ti O_3）复合等离子光催化剂。采用X射线衍射（XRD）、场发射扫描电子显微镜（FE-SEM）、紫外可见漫反射光谱、荧光光谱、光电流密度、光催化制氢性能等技术手段和测试表征了样品的结构及性能。结果表明,Zn Ti O_3在900℃煅烧下呈立方相和六角相的混合相,其形貌呈近似球形,粒径约为50～100 nm。由于纳米金（Nano Au）的表面等离子共振效应,Nano Au-Zn Ti O_3复合材料在可见光区有较强的吸收,吸收峰位于525 nm处。Nano Au-Zn Ti O_3复合等离子光催化剂在可见光激发下呈现出优良的光催化分解水制氢活性。Nano gold-zinc titanate （Nano Au-ZnTiO3 ） composite plasmonic photocatalyst were prepared by a sol-gel process and photodeposition method. The obtained samples were characterized by powder X-ray diffraction （XRD）, field emission scanning electron microscopy （FE-SEM）, UV-Vis diffuse reflectance spectra, fluorescence spectra, photocurrent density and photocatalytic hydrogen production activity. The results indicate that ZnTiO3 sintered at 900℃ shows a mixed phase composed of cubic and hexagonal with a approximately spherical morphology in the size range of 50 -100 nm. An intense absorption band centered at 525 nm of Nano Au-ZnTiO3 can be observed in visible light region due to the surface plasma resonance effect of Au nanopartieles. Under the irradiation of visible light, the Nano Au-ZnTiO3 plasmonic photocatalyst shows excellent photocatalytic activity in hydrogen evolution from water splitting.

关 键 词：溶胶凝胶 光沉积法 纳米金-钛酸锌 等离子光催化剂 

分 类 号：O643[理学—物理化学]