引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 147次   下载 155 本文二维码信息
码上扫一扫!
分享到: 微信 更多
Photo-depositing Ru and RuO2 on Anatase TiO2 Nanosheets as Co-catalysts for Photocatalytic O2 Evolution from Water Oxidation
Shi-yang Mi,Yuan-xu Liu,Wen-dong Wang
Author NameAffiliationE-mail
Shi-yang Mi CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Yuan-xu Liu CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Wen-dong Wang CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China wangwd@ustc.edu.cn 
Abstract:
TiO2 nanosheets mainly exposed (001) facet were prepared through a hydrothermal process with HF as the morphology-directing agent. Ru and RuO2 species were loaded by photo-deposition methods to prepare the photocatalysts. The structural features of the catalysts were characterized by X-ray di raction, transmission electron microscopy, inductively cou-pled plasma atomic emission spectrum, and H2 Temperature-programmed reduction. The photocatalytic property was studied by the O2 evolution from water oxidation, which was examined with respect to the in uences of Ru contents as well as the oxidation and reduction treatments, suggesting the charge separation effect of the Ru species co-catalysts on di erent facets of TiO2 nanosheets. In contrast to Ru/TiO2 and RuO2/TiO2 with the single deposited co-catalyst, the optimized catalyst 0.5%Ru-1.0%RuO2/TiO2 with dual co-catalysts achieved a much improved catalytic performance, in terms of the synergetic effect of dual co-catalysts and the enhanced charge separation effect.
Key words:  Anatase TiO2 nanosheets  Photocatalytic O2 evolution  Crystal facet  Ru co-catalyst  Charge separation
FundProject:
光沉积Ru和RuO2的锐钛矿TiO2纳米片的光解水产氧
米诗阳,刘园旭,汪文栋
摘要:
采用水热法以HF作为结构调控剂合成了主要暴露(001)面的锐钛矿TiO2纳米片,通过光沉积方法分别合成了负载Ru和RuO2物种的光催化剂。利用X射线衍射、透射电镜和氢气程序升温还原等分析表征了催化剂的结构性质。通过光解水产氧反应来研究催化剂的催化性能,详细考察了Ru含量、负载方式以及氧化和还原处理等因素的影响,光解水产氧速率的差异证明了Ru物种在不同晶面的电荷-空穴分离效应。与负载单一助催化剂的Ru/TiO2和RuO2/TiO2样品相比,活性最优的0.5%Ru-1.0%RuO2/TiO2样品由于负载了双助催化剂,其催化活性得到更大的提高,证实了在锐钛矿TiO2上的晶面电荷-空穴分离效应.
关键词:  锐钛矿TiO2纳米片  光解水产氧  晶面  Ru助催化剂  电荷分离
DOI:10.1063/1674-0068/29/cjcp1603057
分类号: