CuO_x/TiO_2光催化水蒸气还原CO_2反应研究

Study of Photocatalytic Reduction of CO2 with H2O Vapor on CuOx/TiO2

摘要:以商品TiO2一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一射线光电子能谱(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一1。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。

Abstract:The goods TiO2 P25 as raw materials, through the impregnation of a certain amount of transition metal Cu, a series of different content of CuOx/TiO2 photocatalyst. By X ray diffraction (XRD), X ray photoelectron spectroscopy (XPS), bet, high resolution transmission electron microscopy (HRTEM), X-ray fluorescence spectrometry (XRF) and light induced luminescence (PL) spectra of such methods of catalysts were characterized in detail, in the photocatalytic reactor with self evaluation the gaseous photocatalytic reduction CO2 reaction activity and CH4 yield. The results show that the load of TiO2 nano materials photocatalytic performance of CuOx was improved remarkably, the 1%CuOx/TiO2 samples under 72 h UV irradiation, CH4 production reached 24. 86 mol. GTi 1. At the same time, CuOx loading, reaction temperature, reaction time and other factors have significant effect on the yield of CH4.

正文快照:国际气候变化专门委员会(IPCC)的研究表明,人类的生产生活行为中以多种方式产生着引起全球变暖的温室气体.尽管其它的温室气体的热捕获能力比CO2强,但CO2因其浓度远大于其它温室气体而对温室效应负有主要责任.以此为出发点,在今后几十年中,通过技术改进从根源上减少CO2的排放