Facile fabrication of porous ZnO by thermal treatment of zeolitic imidazolate framework-8 and its photocatalytic activity

► Porous ZnO powders can be obtained by thermal decomposition of ZIF-8. ► The morphology, structure and performance of porous ZnO can be controlled. ► ZnO-500-5 exhibits efficient photocatalytic activity for the degradation of MB.