Using sodium tungstate dihydrate,commercially available coconut shell activated carbon (AC) and silver nitrate as raw materials,WO3/AC was first obtained by high-temperature calcination,and then Ag3PO4@WO3/AC composites were prepared by co-precipitation method.Rhodamine B (RhB) was used as a simulated pollutant to investigate the effect of doping amount of WO3/AC on the photocatalytic performance of the composites.The results showed that the photocatalytic degradation of RhB by Ag3PO4@WO3/AC was the result of the synergistic effect of activated carbon adsorption and photocatalytic degradation,and the doping of WO3 could effectively prevent the recombination of electron-hole pairs and increase its photocatalytic activity.With the increase of WO3/AC doping ratio,the photocatalytic performance increased first and then decreased.When the doping ratio was 20%,the photocatalytic performance was the best.When the dosage of Ag3PO4@WO3/AC was 0.5g/L and the concentration of RhB solution was 5mg/L,the degradation rate reached 94.31% at 15W and 254nm ultraviolet light for 60 min,which was 85.1% and 83.5% higher than that of WO3 and Ag3PO4,respectively.After three cycles of experiments,the degradation rate could still be maintained at about 81.73%,indicating that the Ag3PO4@WO3/AC photocatalyst had good stability.
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基金资助
安徽省高校自然科学研究项目(2023AH052094);巢湖学院校级化学工程与工艺专业改造提升项目(2022zygzts071)
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