摘要
采用溶剂热法原位合成出一种新型MOF基复合光催化剂ZIF-76@CdS,用FT-IR、XRD和SEM等手段对催化剂的结构和形貌进行了表征,研究了ZIF-76@CdS对有机污染物亚甲基蓝的光催化降解性能,探究了光催化反应可能的机理.研究结果显示:复合光催化剂ZIF-76@CdS对亚甲基蓝的光催化降解活性均优于单独的CdS与ZIF-76.经模拟太阳光照射60 min后,对10 mg/L的亚甲基蓝溶液降解率达到89.94%,分别是单一CdS和ZIF-67催化下的1.72和1.42倍,经过5次循环实验后,ZIF-76@CdS对亚甲基蓝光催化降解率仅下降了4.02%.CdS和ZIF-67的成功复合,扩大了对可见光的吸收范围,可以有效防止电子和空穴的复合,提高载流子的利用效率,使得复合光催化剂ZIF-76@CdS具有较高的催化活性.
a new MOF-based composite photocatalyst ZIF-76@CdS was synthesized in situ by a simple solvothermal method,the structure and morphology of the catalysts were characterized by FT-IR,XRD and SEM,the photocatalytic degradation performance of the composite photocatalyst ZIF-76@CdS for the organic pollutant methylene blue was investigated,and the possible mechanisms of the photocatalytic reaction were also probed.The results showed that the photocatalytic degradation activities of the composite photocatalyst ZIF-76@CdS were better than those of CdS and ZIF-76 alone,and the degradation rate of 10 mg/L methylene blue solution reached 89.94% after 60 min of simulated solar irradiation,which was 1.72 and 1.42 times higher than that of the single CdS and ZIF-67,respectively.The degradation rate of this composite photocatalyst decreased by only 4.02% after five cycle tests.The successful composite of CdS and ZIF-67 enlarged the absorption range of visible light,effectively prevented the compounding of electrons and holes,and improved the utilization efficiency of carriers,which led to the high catalytic activity of the composite photocatalyst ZIF-76@CdS.
作者
李翠林
李星
何倩
王华
LI Cui-lin;LI Xing;HE Qian;WANG Hua(College of Chemical Engineering,Lanzhou University of Arts and Science,Lanzhou 730000,China)
出处
《兰州文理学院学报（自然科学版）》
2024年第3期79-84,128,共7页
Journal of Lanzhou University of Arts and Science(Natural Sciences)
基金
兰州文理学院2022年校级教学质量提升项目(2022-ZL-jxtd-01)。
