Fabrication of nanoplate-like g-C3N4/Bi12TiO20 heterojunction with enhanced visible-light photocatalytic' activity

摘要

In recent years, the high-efficient visible-light-driven photocatalyst has become a research focus to realize the large-scale application of semiconductor photocatalysis. Herein, a novel nanoplate-like g-C3N4/Bi12TiO20 (CN/BTO) heterojunction was prepared by a facile hydrothermal-annealing method for visible-light photocatalysis, and its morphology, structure and optical property were characterized systematically. The characterization results verify that the C-O bond exists between g-C3N4 and BTO, thus confirming the formation of CN-BTO heterojunction. Furthermore, the CN/BTO heterojunctions display much higher photocatalytic performance for Rhodamine B (RhB) degradation than pure BTO and g-C3N4 under visible light irradiation. Among them, the CN/BTO-3 sample with 60 wt% of g-C3N4 exhibits the highest photocatalytic activity. The excellent photocatalytic activity can be primarily attributed to the energy band match and the heterojunction that can accelerate the migration and separation of photo generated charge carriers. This kind of nanoplate-like CN/BTO heterojunction may find potential applications in numerous fields related to environment and energy. (C) 2017 Elsevier Ltd. All rights reserved.