Preparation Of CuO/ZnO Catalyst Derived From MOFs And Its Photocatalytic Performance

In this paper,Cu₃（BTC）₂ is used as a material template to prepare metal oxide CuO,and Zn²⁺calcination is introduced by light deposition to synthesize a bimetal oxide catalyst CuO/ZnO.In this research,the photocatalytic degradation performance for various dyes（rhodamine B,sulforhodamine B,methylene blue,methyl orange）were studied under visible light conditions.The influence of calcination temperature,light intensity and other factors were investigated on photocatalytic degradation.The main active species of the dye was determined in the degradation process.The degradation mechanism of dyes was investigated by liquid phase in-situ infrared technology.The main conclusions are as follows:（1）XRD results showed that various catalysts had been successfully prepared,with obvious characteristic diffraction peaks,good crystal structure and consistent morphology.SEM showed that the CuO/ZnO material prepared still inherited the good morphology of Cu₃（BTC）₂ after derivatization.DRS showed that the prepared catalysts both absorbed visible light and ultraviolet light after derivatization preparation.The band gap width of the catalyst prepared had become narrower,and the light response intensity was better.（2）Compared with CuO/ZnO prepared by chemical synthesis,the MOFs derivative CuO/ZnO catalyst had excellent photocatalytic degradation ability.The degradation efficiency of rhodamine B and methylene blue respectively reached more than 60%and 90%after 150 minutes of visible light response.It had good cycle stability,and the reaction rate was improved under high light intensity conditions.（3）A method of liquid phase in-situ infrared technology was established.The infrared probe was used to detect the photocatalytic degradation of Rhodamine B and Sulfonyl Rhodamine B by using CuO/ZnO derived from MOFs.The results showed that the former undergone a deethylation process,and the latter sulfonic acid groups were destroyed.Eventually,the conjugated structure of the carboxyl group and benzene ring was destroyed.Meanwhile,the nitrogen was released during the degradation process.