Abstract
A novel method for intercalating silver salt into bentonite interlayers is described. The very fine Ag3PO4 crystalline grains (less than 0.45nm) were obtained in the interlayers of bentonite (Ag3PO4-Ben). Ag3PO4-Ben was characterized by XRD, FTIR, XRF, XPS and UV–vis diffuse reflectance spectroscopy. Ag3PO4-Ben particles exhibited high catalytic efficiency for Orange II degradation under visible light irradiation. The photocatalytic activity is attributed to the small-sized Ag3PO4 crystal immobilized in bentonite and the strong adsorption of dye on bentonite. The special structure of bentonite and the microenvironment around the catalysis enhanced the stability.
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