燃料化学学报2017，Vol.45Issue(10)：1266-1274,9.
基于水滑石前驱体制备ZnCr2O4-ZnO复合光催化剂及产氢性能
Preparation of ZnCr2O4-ZnO composite photocatalyst based on the hydrotalcite precursor and its performance in hydrogen production
摘要
Abstract
ZnCr2O4-ZnO composite photocatalyst with heterogeneous structure was synthesized by grinding hydrothermal method and characterized by TG-DTA,XRD,SEM,HRTEM,DRS,and N2 absorption;its photocatalytic activity in H2 production was evaluated by using oxalic acid as the sacrificial agent under simulated sunlight irradiation and compared with those of the ZnCr2O4-ZnO samples prepared by coprecipitation,urea reflux and urea hydrothermal methods.The results indicate that Zn-Cr precursors prepared by four methods show a certain hydrotalcite structure;the catalyst samples prepared at 500℃ are spherical nanoparticles,but different in agglomeration status,specific surface area and pore structure parameters.The ZnCr2O4-ZnO nanoparticles prepared by a grinding hydrothermal method exhibits the optimized photocurrent response and photocatalytic activity;the yield of hydrogen production is 0.956 mmol/(h·gcat),which is 2.3,1.5 and 3.0 times higher than that of the catalyst samples prepared by coprecipitation,urea reflux and urea hydrothermal methods,respectively.On the basis of these results,a possible mechanism for the hydrogen production over ZnCr2O4-ZnO composite photocatalyst with heterogeneous structure was then proposed.关键词
研磨水热法/ZnCr2O4-ZnO/异质结/光催化产氢Key words
grinding hydrothermal method/ZnCr2O4-ZnO/heterojunction/photocatalytic hydrogen production分类
化学化工引用本文复制引用
张丽,戴超华,粱青满,阎建辉,周民杰..基于水滑石前驱体制备ZnCr2O4-ZnO复合光催化剂及产氢性能[J].燃料化学学报,2017,45(10):1266-1274,9.基金项目
The project was supported by the National Natural Science Foundation of China (51372080),the Natural Science Foundation of Hunan Provincial of China(2017JJ2108) and Scientific Research Foundation of Hunan Provincial Education Department of China (15A076).国家自然科学基金(51372080),湖南省自然科学基金面上项目(2017JJ2108)和湖南省教育厅重点项目(15A076)资助 （51372080）
