简介：ZnOnanoconearrays(NCAs)decoratedwithblackTiO2nanoparticles(BTiO2NPs)wereuniformlyanchoredonthesurfaceofcarboncloth(CC)directlybyasimplyelectrochemicaldepositionmethod.ThusanovelB-TiO2NPs/ZnONCAs-CChierarchicalheterostructurewasformed.Itdisplayedsuperiorperformanceandachievedahigherphotocurrentover0.4mA·cm^-2beforetheonsetofthedarkcurrent,attributedtotheseparationofthephotogeneratedelectron-holepair.BasedontheB-TiO2NPs/ZnONCAs-CCheterostructure,thecatalystwasfabricatedforpromotingtheseparationofchargecarriers.Moreover,theintroductionofTi^3+andoxygenvacanciesonthesurfaceofTiO2NPsexpandedtheabsorptionbandedgeandenhancedtheelectricalconductivityaswellasthechargetransportationonthecatalyticsurface.ItindicatesthattheB-TiO2NPs/ZnONCAs-CCcompositeisbeneficialtotheimprovementofthephotoelectrochemical(PEC)activity.