摘要
以商品TiO2-P25为原料,通过浸渍法负载一定量过渡金属Cu,得到一系列不同含量的CuOx/TiO2光催化剂.利用X射线衍射(XRD),X-射线光电子能谱(XPS),BET,高分辨率透射镜(HRTEM),X射线荧光光谱(XRF)和光致发光光谱(PL)等方法对催化剂进行了详细表征,在自建的光催化反应器中评价了气态水光催化还原CO2反应的活性和CH4收率.结果表明负载CuOx后的TiO2纳米材料光催化性能显著提高,其中1%CuOx/TiO2样品紫外光照72 h后,CH4生成量达到了24.86μmol.gTi-1.同时,CuOx负载量、反应温度、反应时间等因素对CH4收率均有显著影响.
Using TiO2-P25 as a main material,CuOx loaded TiO2-P25 photocatalysts were prepared via wet impregnation method.The catalysts were characterized with powder X-Ray Diffraction（XRD）,XPS,BET,High-Resolution Transmission Electron Microscopy（HRTEM）,X-Ray Fluorescence Spectrometry（XRF） and photoluminescence（PL）.The photoactivity of the catalysts was tested by photocatalytic reduction of CO2 with H2O vapor to produce chemically valuable compound including CH4 in self-build experimental set up.The experiment results suggested that the photocatalytic activity of TiO2 was improved remarkably with the loading of CuOx on the catalyst surface.The CH4 yield on 1%CuOx/TiO2 reached 24.86 mol·gTi-1 after 72 h UV irradiation,and the CuOx loading amount,the reaction temperature,reaction time also had great effect on CH4 yield.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2011年第1期84-89,共6页
Journal of Molecular Catalysis(China)
基金
国家自然科学基金(20576031&20706014)
作者简介
张钦辉，男，教授，博士研究生导师，E-mail（qhzhang@eeust．edu．cn）．
