Preparation of Carbon Quantum Dots(CQDs)Modified BiOBr/ZnO for Degradation of Water Pollutants
CQDs/BiOBr/ZnO heterojunction photocatalysts were synthesized by solvothermal method.Using a xenon lamp as the light source,the degradation performance of the prepared catalyst for methylene blue and Rhodamine B were studied.The results indicated that the doping of CQDs and the formation of BiOBr/ZnO heterojunctions can enhance the photocatalytic degradation performance of ZnO.Under the same conditions,the degradation efficiency of CQDs/BiOBr/ZnO towards methylene blue within 60 minutes is 88%,and the degradation rate constants are 1.13 times and 3.78 times higher than those of BiOBr/ZnO and pure ZnO,respectively.After 5 repeated experiments,the catalyst still exhibits good stability.
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