Photocatalytic oxidation of cyanide under visible light by Pt doped AgInS2 nanoparticles

•Pt/AgInS2 was used for photocatalytic oxidation of cyanide.•Photocatalytic oxidation of cyanide was dependent on wt% of Pt, reaction time, and weight of catalyst.•Catalyst re-use revealed the present photocatalyst remain effective and active after five cycles.

AgInS2 nanoparticles were prepared by a microwave method, while Pt was doped on the surface of AgInS2 via photoassisted deposition method. The catalytic performances of the AgInS2 and Pt/AgInS2 samples were carried out for photocatalytic oxidation of cyanide under visible light. The UV–vis analysis proved a red shift was detected after the loading of Pt into the AgInS2. The maximum oxidation efficiency achieved was 100% at 1.5 wt% Pt/AgInS2 photocatalyst after 35 min reaction time. The catalyst could be reused without any loss in activity during the first five cycles.

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