应用化学 ›› 2016, Vol. 33 ›› Issue (5): 583-590.DOI: 10.11944/j.issn.1000-0518.2016.05.160123

• 研究论文 • 上一篇    下一篇

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

史建建,刘小明(),唐星华,李帅龙   

  1. 南昌航空大学环境与化学工程学院 南昌 330063
  • 收稿日期:2016-03-23 接受日期:2016-03-29 出版日期:2016-04-29 发布日期:2016-04-29
  • 通讯作者: 刘小明
  • 基金资助:
    江西省自然科学基金(20152ACB20011)资助

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

SHI Jianjian,LIU Xiaoming(),TANG Xinghua,LI Shuailong   

  1. Environmental and Chemical Engineering,Nanchang Hangkong University,Nanchang 330063,China
  • Received:2016-03-23 Accepted:2016-03-29 Published:2016-04-29 Online:2016-04-29
  • Contact: LIU Xiaoming
  • Supported by:
    Supported by the Natural Science Foundation of the Jiangxi Province of China(No.20152ACB20011)

摘要:

利用溶胶-凝胶法及光沉积法制备纳米金-钛酸锌(Nano Au-ZnTiO3)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,ZnTiO3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-ZnTiO3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-ZnTiO3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。

关键词: 溶胶凝胶, 光沉积法, 纳米金-钛酸锌, 等离子光催化剂

Abstract:

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 nanoparticles. Under the irradiation of visible light, the Nano Au-ZnTiO3 plasmonic photocatalyst shows excellent photocatalytic activity in hydrogen evolution from water splitting.

Key words: sol-gel, photodeposition, nano gold-zinc titanate, plasmonic photocatalyst