Abstract
A series of Z-scheme Ag2WO4/Bi2MoO6 composites were successfully synthesized by a solvothermal-precipitation method. The crystallization, optical property, morphology properties were studied by XRD, UV–Vis DRS, PL, PT, EIS, BET, and SEM, respectively. The photocatalytic properties of Z-scheme Ag2WO4/Bi2MoO6 photocatalyst were evaluated by the degradation of methylene blue (MB) under visible-light irradiation. The results have shown that 30%Ag2WO4/Bi2MoO6 samples possessed the highest photocatalytic activity and superior adsorption capability for methylene blue (MB) with almost complete degradation within 30 min, which was considerably better than pure Bi2MoO6 (70%) and Ag2WO4 (32%). The enhanced photocatalytic activity can be attributed to the synergistic effect in the Ag2WO4/Bi2MoO6 composites, lower electron–hole recombination rate, and higher electron–hole separation efficiency. Radical trapping experiments revealed that the •O2− and h+ were the main active species in catalysis. In addition, the potential photocatalytic mechanism also was discussed based on experimental and characterization results. This work provides a simple method for synthesizing photocatalysts with excellent photocatalytic performance, which has a good prospect in the field of water purification.
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