Study of 2-Propanol Photocatalytic Degradation on Surface of Phase-Ratio-Controlled TiO_2 Nanoparticles  

作　　者：Yifei Wang Hongmei Wang Xin Tan 

机构地区：[1]School of Environmental Science and Engineering,Tianjin University [2]Tianjin Metro Group Co.,Ltd. [3]School of Science,Tianjin University

出　　处：《Transactions of Tianjin University》2018年第1期1-7,共7页天津大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos.21406164,21466035,51203111);the National Basic Research Program of China("973" program,Nos.2012CB720100,2014CB239300)

摘　　要：The crystal form of TiO_2 is a crucial focus of research on the photocatalytic degradation of gaseous pollutants by TiO_2-based composite photocatalysts. To explore the synergistic effect of mixed crystalline TiO_2 on gaseous organic-pollutant photocatalytic degradation, we synthesized a series of TiO_2 nanoparticles with controllable phase ratios. We explored the role of the TiO_2 phase ratio on the photocatalytic activity and degradation pathway in the photodegradation of 2-propanol(IPA). We estimated the crystallite size and crystal proportions of anatase and rutile by X-ray diffraction. We used the Brunauer-Emmett-Teller method to calculate the specific surface area and Fourier transform infrared spectroscopy to characterize the surface chemistry of the samples. Our results show the photocatalytic activities of pure anatase and the sample with 8.6% rutile to be much better than those of the samples with a phase junction and pure rutile. As such, anatase is the better option for the study of photodegradation design and preparation of gas-phase organic pollutants.The crystal form of TiO_2 is a crucial focus of research on the photocatalytic degradation of gaseous pollutants by TiO_2-based composite photocatalysts. To explore the synergistic effect of mixed crystalline TiO_2 on gaseous organic-pollutant photocatalytic degradation, we synthesized a series of TiO_2 nanoparticles with controllable phase ratios. We explored the role of the TiO_2 phase ratio on the photocatalytic activity and degradation pathway in the photodegradation of 2-propanol(IPA). We estimated the crystallite size and crystal proportions of anatase and rutile by X-ray diffraction. We used the Brunauer-Emmett-Teller method to calculate the specific surface area and Fourier transform infrared spectroscopy to characterize the surface chemistry of the samples. Our results show the photocatalytic activities of pure anatase and the sample with 8.6% rutile to be much better than those of the samples with a phase junction and pure rutile. As such, anatase is the better option for the study of photodegradation design and preparation of gas-phase organic pollutants.

关 键 词：MIXED-PHASE TiO2 PHASE JUNCTIONS PHOTOCATALYTIC degradation 2-Propanol 

分 类 号：G64[文化科学—高等教育学]