Polyoxometalates acting as a hole-transfer mediator and crystallization accelerant in a perovskite photoanode for the photoelectrocatalytic oxidation of benzene into phenol

摘要: Organic metal halide perovskite (OMHP) material shows promising applications in the photoelectrocatalytic field, but its efficiencies are unsatisfactory due to bulk and surface carrier recombination. In this work, we used dual polyoxometalates (C4H9N)3PW12O40 [Ag10[{Co(H2O)3}2{CoBi2W19O66(OH)4}] modify OMHP photoanode; former acted improve quality of film latter could facilitate hole transfer. Such modifications effectively reduce recombination thus obviously boost efficiency. Hence, explored oxidation benzene into phenol aqueous solution by using modified photoanode. The yield reaction photoanode reached about 31.8%, which was superior that pure Furthermore, carried out radical scavenger studies investigate active species involved reaction, proposed plausible mechanism over These results provide new insights development high performance photoanodes for organic transformation.