Vertical Growth of WO3 Nanosheets on TiO2 Nanoribbons as 2D/1D Heterojunction Photocatalysts with Improved Photocatalytic Performance under Visible Light

We report the construction of 2D/1D heterojunction photocatalysts through hydrothermal growth WO3 nanosheets on TiO2 nanoribbons for first time. Two-dimensional were vertically arrayed surface nanoribbons, and density could be simply controlled by adjusting concentration precursors. The WO3/TiO2 heterojunctions not only decreases band gap energy from 3.12 to 2.30 eV broadens photoresponse range UV region visible light but also significantly reduces electron–hole pair recombination enhances photo-generated carrier separation. Consequently, heterostructures exhibit improved photocatalytic activity compared pure upon irradiation. WO3/TiO2-25 possesses highest can remove 92.8% RhB pollutants in 120 min. Both further increase decrease result an obvious reduction activity. kinetic studies confirmed that degradation follows kinetics pseudo-first-order model. present study demonstrates prepared are promising materials removal organic produce clean water.