可见光驱动TaOxNy制备及其在降解二氯乙酸中的研究  

Study on preparation of TaO_xN_y driven by visible light and degradation of DCAA

作　　者：姜俊艳[1,2] 孙晓君[1] 井立强[2] 魏金枝[1] 颜婉茹[1] 白刚[1] 

机构地区：[1]哈尔滨理工大学化学与环境工程学院,黑龙江哈尔滨150040 [2]黑龙江大学化学化工与材料学院,黑龙江哈尔滨150080

出　　处：《化学研究与应用》2008年第10期1345-1348,共4页Chemical Research and Application

基　　金：黑龙江省教育厅科学技术研究项目(11511050)资助;黑龙江省博士后基金资助项目(LSZH-04120)

摘　　要：The photocatalysts TaOxNy were prepared by gas-solid reaction method with Ta2O5 as starting substance nitrified by NH3 under high temperature.The prepared samples were characterized by XRD,XPS,and UV-VIS.The results of XRD and XPS showed that non-stoichiometric sample,TaO1.3N0.8,was formed when the reaction temperature was 850℃,the reaction time was 10 hours and the flux of ammonia gas was 100 mL/min.And the result of UV-VIS showed that the response area of the sample was shifted to the visible-light.In addition,the photocatalytic activities of TaOxNy for degradation of dichloroacetic acid(DCAA)under irradiation of visible light were also investigated in the paper.Furthermore,Pt/ TaOxNy was prepared by loading Pt on the surface of TaOxNy by photoreduction method.And the effect of depositing amount of Pt on degradation of DCAA were also discussed.The results showed that the photocatalytic activities of TaOxNy were highly increased by loading Pt on the surface of TaOxNy.The optimum loading amount of Pt was 1.5wt%.The degradation rate of DCAA was 51.06 % after irradiation for120 min under visible-light.The photocatalysts TaOxNy were prepared by gas- solid reaction method with Ta2O5 as starting substance nitrified by NH3 under high temperature. The prepared samples were characterized by XRD, XPS, and UV - VIS. The results of XRD and XPS showed that non -stoichiometric sample, TaO1.3N0.8, was formed when the reaction temperature was 850℃ ,the reaction time was 10 hours and the flux of ammonia gas was 100 mL/min. And the result of UV - VIS showed that the response area of the sample was shifted to the visible -light. In addition, the photocatalytic activities of TaOxNy for degradation of dichloroacetic acid（DCAA） under irradiation of visible light were also investigated in the paper. Furthermore, Pt/TaOx Ny was prepared by loading Pt on the surface of TaOxNy by photoreduction method. And the effect of depositing amount of Pt on degradation of DCAA were also discussed. The results showed that the photocatalytic activities of TaOxNy were highly increased by loading Pt on the surface of TaOxNy. The optimum loading amount of Pt was 1.5wt%. The degradation rate of DCAA was 51.06 % after irradiation for 120 min under visible - light.

关 键 词：光催化剂 TaOxNy 降解 二氯乙酸 

分 类 号：TQ134[化学工程—无机化工] O623[理学—有机化学]