Novel Bi2MoO6 Nanosheets/Vertical TiO2 Nanorods Arrays Heterojunction with Enhanced Photoelectrochemical Performance under Visible Light Irradiation

摘要

Novel Bi2MoO6/TiO2 heterojunction was fabricated by growing Bi2MoO6 nanosheets arrays on the vertically aligned TiO2 nanorods arrays via a two-step solvothermal method.The obtained Bi2MoO6/TiO2 hierarchical heterojunction showed excellent visible light photoelectrochemical performance.Compared with the pure TiO2 and Bi2MoO6,the photocurrent density of the heterojunction was increased 57 and 29 times,respectively.Furthermore,the hydrogen generation rate of the Bi2MoO6/TiO2 for photoelectrocatalytic water-splitting was about 6 times higher than that of the pure Bi2MoO6.The improved performance can be attributed to the synergistic effects of enhanced absorption of visible light,increase of migration rate and separation efficiency of photo-induced carriers.