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a Photocatalytic degradation of MB by Ag3PO4 QDs, R-1.5, R-2, R-2.3, R-2.5, and R-3 composites, b corresponding rate constants (k) of samples for photocatalytic degradation of MB, c recycling experiments of the R-2.3 for degradation of MB, and d XRD patterns before and after the recycling experiments
