Design of 2D/3D Heterojunction for Enhanced Photocatalytic Efficiency

Abstract

The heterostructure design between semiconductorsis a promising method to enhance the separation of excitons in semiconductor photocatalysis. A 2D/2D heterostructure, Bi4Ti3O12/Bi5BaTi3O14Cl, and three 3D/2D heterostructures, SrTiO3/Bi5BaTi3O14Cl, BaTiO3/Bi5BaTi3O14Cl, CaTiO3/Bi5BaTi3O14Cl, have been synthesized via in situ solid-state reactions for the first heterostructure and hydrothermal reaction for rest of three.The compounds are characterized by Powder X-ray Diffraction(PXRD)and UV-Vis-Diffusive Reflectance spectroscopy (UV-Vis-DRS).PXRD analysis confirms the heterostructure formation. DRS spectra suggest that the synthesized heterostructures absorb radiations in the visible region. Photocatalytic water splitting for hydrogen production and RhB dye degradation was carried out to check the photocatalytic activity of designed heterostructures.