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By deposition of Au nanoparticles (Au NPs) onto BiOCl (BOC) nanosheet with different facets, in the reaction of decomposing Orange II, we systematically investigated the preferred transfer orientation (PTO) of photo-generated electron--hole pairs in BOC under UV light irradiation. Also, the active oxidative intermediates during the degradation process were also studied. Moreover, the Au NPs successfully brought about visible light response to the wide gap BOC, while the exposed different facets were found to be influential on the surface plasmon resonance (SPR) effect. The present work may contribute to a deeper sight of the relationship between specific facets and photocatalytic performance, together with a further understanding of SPR-induced photocatalytic activity. [ABSTRACT FROM AUTHOR]

Pb3O4 could react with organic dyes in aqueous solution under visible light irradiation, in which Pb3O4 was transformed into Pb3(CO3)2(OH)2 along with oxidation of the organic dyes. Cu2+ has considerable effect on the reaction. In the presence of Cu2+, MO (20 ppm) and RhB (10-5 mol L-1) were completely degraded under visible light within 6 and 20 min, respectively, while both Pb3O4 and Cu2+ keep almost stable during photo-degradation. The mechanisms of the reactions with and without Cu2+ ions were studied. The photochemical system of Pb3O4 cooperating with Cu2+ ions is probably used for the treatment of organic pollutants in water under visible light. [ABSTRACT FROM AUTHOR]