Abstract
Gallium phosphide(GaP) nanoparticle was synthesized by the reaction of sodium phosphide and gallium chloride in dimethylbenzene.GaP-supported platinum photocatalysts,Pt(0.80wt%)/GaP and Pt(4.2wt%)/ GaP nanoparticles,were prepared by the simple reduction of chloroplatinic acid(H2PtCl6) with hydrazine hydrate(N2H4.H2O).The photocatalytic activities of GaP and Pt/GaP nanoparticles for the decomposition of crystal violet were investigated under visible light irradiation.The results indicate that GaP,Pt(0.80wt%)/GaP and Pt(4.2wt%)/GaP nanoparticles can harness visible light to decompose crystal violet in aqueous solution.The photocatalytic activity of Pt(0.80wt%)/GaP is better than that of GaP while the photocatalytic activity of GaP is better than that of Pt(4.2wt%)/GaP.The Pt coverage has an important effect on the photocatalytic activity of Pt/GaP nanoparticles.
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