In order to improve the efficiency of BiOI photoelectrocatalytic methanol oxidation,AgI/BiOI composite photocatalysts were prepared in this study using a simple ion-exchange method.The loading of AgI improved the efficiency of methanol oxidation,in which the highest photoelectrocatalytic activity of AgI/BiOI samples was observed at a photoreduction time of 10 min,and the formaldehyde yields and Faraday efficiencies reached 0.952 μg·mL-1·h-1 and 53%,respectively.The results indicate that the enhanced photocatalytic performance of the AgI/BiOI composites is mainly attributed to the construction of heterojunctions,which in turn improves the separation efficiency of the photogenerated carriers.The active species trapping experiments revealed a possible mechanism in the methanol oxidation process.
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