LAUSR

We report the synthesis and photoelectrochemical characterization of a novel composite consisting of Mn3O4 nanoparticles, porphine manganese(III) (PMA), and TiO2 photonic crystal (TPC). The prepared composite (Mn3O4/PMA/TPC) was used for fabricating the photoanode of a photoelectrochemical tandem cell. The obtained Mn3O4/PMA/TPC composite was characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and UV–vis diffuse reflectance spectroscopy (DRS). The results demonstrated that PMA and Mn3O4 nanoparticles had been loaded in the hole of TPC successfully. The photoelectrochemical characterization of the Mn3O4/PMA/TPC electrode revealed an enhanced light harvesting and effective electron–hole separation. The photoelectrochemical tandem cell, of which Mn3O4/PMA/TPC electrode acted as a photoanode and a Pt plate as counter electrode, was used to evaluate the feasibility for water splitting to produce H2 and O2 under a 300 W solar simulator irradiation. The gases evolved from...