Study of flower-like Bi2MoO6/Ag3PO4 composite constructed by nano sheet and their photocatalytic degradation performance on sporting goods printing and dyeing wastewater

In this study, flower-like Bi2MoO6/Ag3PO4 composite photocatalysts were synthesized through in-situ chemical precipitation, and their photocatalytic activity for Rhodamine B (RhB) degradation was studied. The structure and activity of the composite catalysts were characterized with XRD, SEM, EDX, TEM, HRTEM, SAED, XPS, UV-Vis diffuse reflection absorption spectrum and photocatalytic degradation experiments. The results showed that the photocatalytic performance of the composite Bi2MoO6/Ag3PO4 was significantly better than that of pure Bi2MoO6 and pure Ag3PO4, and the composite with the composition of 0.1Bi(2)MoO(6)/Ag3PO4 showed the best performance in the photocatalytic degradation of Rhodamine B (RhB). The degradation rate of RhB reached up to 98% after visible light exposure for 25 min, and the maximum reaction rate constant measured for 0.1Bi(2)MoO(6)/Ag3PO4 was 0.09457 min(-1), which was twice that of pure Ag3PO4 and 38 times that of pure Bi2MoO6. After three cycles, the catalytic performance of 0.1Bi(2)MoO(6)/Ag3PO4 did not decrease significantly, and 82% of RhB was still degraded. Capture experiments showed that holes (H+) and superoxide anions (O-2 & BULL;) played a major role in the photocatalytic degradation of RhB using 0.1Bi(2)MoO(6)/Ag3PO4, and hydroxyl radicals (OH & BULL;) only partially contributed to the activity. The energy level structure of Bi2MoO6/Ag3PO4 was conducive to the separation of photogenerated electrons and holes, and as a result, the service life of photogenerated carriers was prolonged. Notably, the photocatalytic activity of the 0.1Bi(2)MoO(6)/Ag3PO4 composite photocatalyst was the highest.