Polyvinylpyrrolidone(PVP),cetyltrimethylammonium bromide(CTAB),and sodium dodecyl sulfate(SDS)were used as surfactants,SnO2/Cu/PANI nanocomposites with enhanced photocatalytic activity have been prepared by hydrothermal synthesis and in-situ oxidation methods.Using a 250 W ultraviolet lamp as the light source to degrade Rhodamine B(RhB),the photocatalytic activity of the prepared sample was evaluated.When the concentration of composite aniline was 20％,the degradation rate within 40 minutes was 98.8％,which was 3 times that of pure SnO2 and 5 times that of PANI,respectively.Composite aniline can improve the migration efficiency of charge carriers and reduce the recombination rate of photogenerated electron-hole pairs.The mechanism of photocatalytic degradation was determined by adding different types of sacrificial agents,and active holes(h+)and superoxide radicals(·O2-)are the main active substances in the photocatalytic degradation process.
关键词
SnO2/Cu/聚苯胺/复合催化剂/光催化/有机染料降解
Key words
SnO2/Cu/polyaniline/Composite catalyst/Photocatalysis/Degradation of organic dye
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