基于嘧啶基四元羧酸的Zr-MOF异质结的构建及光催化去污性能OA

In order to fully utilize the high stability of Zr-MOF catalyst and further enhance their visible light catalytic decontamination efficiency,a pyrimidine-based Zr-MOF was synthesized and combined with the in-situ generated In2S3 species to prepare a novel In2S3/Zr-MOF composite material.And its ability of photocatalytically purifying of Cr2O2-7 and dyes in water was studied under the sunlight simulated by xenon lamp.The results indicate that the photochemical removal efficiency of Cr2O2-7 by the constructed heterojunction material within 60 min is confirmed to be 91.52%,and the reaction rates reach 3.66 and 2.70 times that of Zr-MOF and In2S3,respectively.Within 180 and 120 min,the photocatalytic degrada-tion efficiencies of the dyes methylene blue(MB)and rhodamine B(RhB)have reached 84.14%and 82.89%,with the reaction rates of 2.83 and 2.66 times,as well as 1.75 and 1.20 times that of Zr-MOF and In2S3,respectively.Mechanism analysis revealed that the carrier transfer between heterogeneous components conformed to the Type-II mechanism.The electrons aggregated in the LUCO orbitals of Zr-MOF and the indirectly generated superoxide radicals played a decisive role in the reduction of Cr2O2-7 and the degradation of dyes.