ZIF-8 nanoparticles were synthesized by solvent method using zinc nitrate and 2-methylimidazolium as raw materials,and the synthesized ZIF-8 frame was used as the carrier of Au nanoparticles.The catalytic performance of Au@ZIF-8 for the degradation of methylene blue by sodium borohydride was studied.The results shown that ZIF-8 with regular particle size and morphology can be obtained by using methanol with suitable protonation ability as reaction solvent at 25℃ for 24h.Au nanoparticles were well loaded on metal-organic framework (ZIF-8) and had good dispersibility.Under the excitation of ultraviolet light,under the condition of degradation of 12min,Au@ZIF-8 had a high degradation rate of methylene blue.Sodium citrate can prevent the agglomeration of gold and facilitated the catalytic process.Au nanoparticles with small particle size can catalyze the degradation of methylene blue more quickly.
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