不同反应溶剂制备BiOI光催化性能

Photocatalytic performance of BiOI prepared with different reaction solvents

采取溶剂热法,分别以乙醇、乙二醇和甘油作为溶剂制备BiOI催化剂,采用XRD、XPS、SEM和N2吸附-脱附对微观结构进行了表征。以罗丹明B为降解染料,在模拟可见光下考察不同溶剂制备的BiOI光催化性能。实验结果表明,以乙二醇为溶剂制备的BiOI微球颗粒小,分散性好,对罗丹明B的降解率为91.6%。反应速率常数为0.020 17 min^(-1),分别是乙醇和甘油作溶剂制备样品的11倍和1.3倍。活性物种捕获实验表明,h+是参与反应的主要活性物种。

BiOI photocatalyst was prepared with ethanol,ethylene glycol and glycerol as solvents individually,using solvothermal method.The microstructure was characterized by XRD,XPS,SEM,and N 2 adsorption-desorption.Using Rhodamine B as a degradabledye,the photocatalytic performance of BiOI prepared with different solvents was investigated for the removal of dyes from water under simulated visible light.The experimental results showed that the BiOI microspheres prepared with ethylene glycol as the solvent had smaller particles,better dispersibility,and the highest degradation rate of Rhodamine B with 91.6%.The reaction rate constant was 0.02017 min^(-1),which was 11 times and 1.3 times that of the samples prepared using ethanol and glycerol as solvents,respectively.The active species capture experiment showed that h+was the main active species participating in the reaction.