Facile one-step synthesis of BiOCl/BiOI heterojunctions with exposed {001} facet for highly enhanced visible light photocatalytic performances

• BiOCl/BiOI heterojunctions with exposed {001} facets have been prepared.
• Effect of ratio between BiOCl and BiOI on photocatalytic activity was investigated.
• 70% BiOCl/BiOI heterojunctions exhibited the highest photocatalytic activity.
• The mechanism for the enhanced photocatalytic activity was revealed.

Flowers-like structure BiOCl/BiOI heterojunctions with exposed {001} facets have been prepared by a facile one-step hydrothermal method. The 70% BiOCl/BiOI heterojunction exhibited the highest photocatalytic activity. The highly enhanced visible light photocatalytic performance was mainly ascribed to the synergistic effect of {001} crystal facets, sensitization of RhB, increasing photo absorption and heterojunctions. The synergistic effect of coupled system could open up new opportunities to develop high-performance photocatalysts for degradation of organic pollutants in water.

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