Ag修饰纳米氧化锌的制备及光催化活性分析
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摘要
以二水合醋酸锌和一缩二乙二醇为原料,在非水体系中超声辅助获得纳米氧化锌光催化剂。采用亚甲基蓝水溶液为模拟研究对象,结合羟基自由基(·OH)清除剂叔丁醇、超氧自由基抑制剂(O_2(·-))对苯醌以及光催化助剂H_2O_2,分析了纳米氧化锌光催化降解亚甲基蓝体系中活性氧物种主要有·OH和O_2(·-)。同时,对氧化锌进行了银修饰研究,结果表明:金属Ag单质均匀分散于ZnO基底表面,修饰后的样品光响应范围拓宽至可见光区,Ag修饰提高了光生空穴和电子的分离效率,改善了催化剂的光催化性能。
Using hydrated zinc acetate and diethylene glycol as raw materials,photocatalyst zinc oxide was synthesized by ultrasonic concussion under the non-aqueous system. The catalytic performance of nanometer zinc oxide was analysed in the experiment using methylene blue aqueous,hydroxyl radical scavenger( CH_3)_3 COH,superoxide radical inhibitor C_6H_4O_2 and photocatalytic promoter H_2O_2 as the object of simulation research,the active oxygen species mainly included ·OH and O_2(·-). Meanwhile,the Ag-loaded ZnO materials study was carried out,the result indicate that the metal Ag was uniformly dispersed on the surface of ZnO substrate,the light response range of the sample was extended to the visible region,and Ag modification increased the separation efficiency of the photoinduced cavitation and electron,and improved the photocatalytic performance of the catalyst.
Using hydrated zinc acetate and diethylene glycol as raw materials,photocatalyst zinc oxide was synthesized by ultrasonic concussion under the non-aqueous system. The catalytic performance of nanometer zinc oxide was analysed in the experiment using methylene blue aqueous,hydroxyl radical scavenger( CH_3)_3 COH,superoxide radical inhibitor C_6H_4O_2 and photocatalytic promoter H_2O_2 as the object of simulation research,the active oxygen species mainly included ·OH and O_2(·-). Meanwhile,the Ag-loaded ZnO materials study was carried out,the result indicate that the metal Ag was uniformly dispersed on the surface of ZnO substrate,the light response range of the sample was extended to the visible region,and Ag modification increased the separation efficiency of the photoinduced cavitation and electron,and improved the photocatalytic performance of the catalyst.
引文
[1]魏鹏飞,余小红,李尧.氧化锌光催化剂的修饰与复合研究进展[J].江汉大学学报(自然科学版),2018,46(1):42-48.
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[15] Georgekutty R,Seery M K,Pillai S C. A highly efficient Ag-ZnO photocatalyst:synthesis,properties,and mechanism[J]. Journal of Physical Chemistry C,2008,112(35):13563-13570.
[16] Elango M,Deepa M,Subramemian R,et al. Synthesis,characterization of polyindole/Ag ZnO nanocomposites and its antibacterial activity[J].Journal of Alloys&Compounds,2017,696(5):391-401.
[17] Lim J K,Melani L,Kim H J. Effects of Ag/ZnO composite fillers on the antifungal activity of paper[J]. Journal of korea technical association of the pulp and paper industry,2017,49(4):134-142.
[18]孙连志,赵圣哲,高志伶,等. Ag/ZnO纳米纤维的制备及光催化性能[J].高等学校化学学报,2017,38(6):907-914.
[19] Wei Min. Preparation of ZnO/Ag heterostructure material by one-pot method for enhanced photocatalytic performance[J]. Chemical research in chinese universities,2017,33(1):1-6.
[20]李建昌,姜永辉,单麟婷,等.银掺杂氧化锌薄膜的溶胶-凝胶法制备及表征[J].东北大学学报(自然科学版),2011,32(12):1753-1756.
[2]李春,汪恂,朱雷,等.镉修饰纳米氧化锌光催化性能研究[J].工业水处理,2017,37(8):50-53.
[3]何登良,谭自香,田奇.室温一步固相反应合成纳米氧化锌的表征、光催化性能及动力学[J]. 2017,33(6):1065-1073.
[4]程涛,汪恂,朱雷. ZnO纳米材料的制备及其光催化性能研究[J].工业安全与环保,2016,42(5):44-47.
[5] Chen S F,Zhao W,Liu W,et al. Preparation,characterization and activity evaluation of p-n junction photocatalyst p-ZnO/n-TiO2[J]. AppliedSurface Science,2008,255(5):2478-2484.
[6] Zhou N,Xue J J,Wang L,et al. Potoelectric catalytic degradation of methyl orange in aqueous solution over Ti O2nanotubes array[J]. Materials Review,2011,25(8):75-78.
[7]秦茜,孙玉绣,王乃鑫.表面修饰在MOF薄膜制备中的应用[J].化工进展,2017,36(4):1306-1315.
[8]李杰,刘卫霞,徐志花.纳米氧化锌的修饰及其光催化性能研究[J].湖北农业科学,2015,54(24):6338-6341.
[9]张雄斌,贺辛亥,程稼稷.纳米氧化锌的制备及修饰研究进展[J].人工晶体学报,2017,46(10):2054-2057.
[10]崔玉民,李慧泉,苗慧,等.氧化锌制备及其光催化活性研究[J].化工新型材料,2015,43(5):100-102.
[11]章丹,徐斌,朱培娟,等. Ti O2光催化降解亚甲基蓝机理的研究[J].华东师范大学学报(自然科学版),2013,5:36-45.
[12]韩婧,施利毅,成荣明,等. Ag修饰纳米ZnO薄膜及光催化活性[J].无机化学学报,2008,24(6):950-955.
[13] Liu H R,G X Shao,Zhao J F,et al. Worm-like Ag/Zn O core-shell heterostructural composites:fabrication,characterization,and photocatalysis[J]. The Journal of Physical Chemistry C,2012,116(30):16182-16190.
[14] Sun Y,Xia Y. Large-scale synthesis of uniform silver nanowires through a soft,self-seeding,polyol process[J]. AdvancedMaterials,2002,14:833-837.
[15] Georgekutty R,Seery M K,Pillai S C. A highly efficient Ag-ZnO photocatalyst:synthesis,properties,and mechanism[J]. Journal of Physical Chemistry C,2008,112(35):13563-13570.
[16] Elango M,Deepa M,Subramemian R,et al. Synthesis,characterization of polyindole/Ag ZnO nanocomposites and its antibacterial activity[J].Journal of Alloys&Compounds,2017,696(5):391-401.
[17] Lim J K,Melani L,Kim H J. Effects of Ag/ZnO composite fillers on the antifungal activity of paper[J]. Journal of korea technical association of the pulp and paper industry,2017,49(4):134-142.
[18]孙连志,赵圣哲,高志伶,等. Ag/ZnO纳米纤维的制备及光催化性能[J].高等学校化学学报,2017,38(6):907-914.
[19] Wei Min. Preparation of ZnO/Ag heterostructure material by one-pot method for enhanced photocatalytic performance[J]. Chemical research in chinese universities,2017,33(1):1-6.
[20]李建昌,姜永辉,单麟婷,等.银掺杂氧化锌薄膜的溶胶-凝胶法制备及表征[J].东北大学学报(自然科学版),2011,32(12):1753-1756.