Designing Visible-Light-Driven Z-Scheme Catalyst 2D g-C_3N_4/Bi_2MoO_6: Enhanced Photodegradation Activity of Organic Pollutants

摘要

Photocatalysis is a promising technology to solve the environment problems.Charge separation efficiency and oxidation capability are both vital factordetermining the performance of photocatalysts. In this work, 2D g-C_3N_4 isapplied to modify Bi_2MoO_6 via an in situ hydrothermal method to designvisible-light-driven Z-scheme catalyst. The principle of this structure is to usethe opposite surface charge of each component, maintaining the strongredox ability of photogenerated electrons and holes, preventing the recombinationof photogenerated carrier effectively. As expected, the photodegradationperformance of as-prepared composites enhances dramatically comparedwith the pure Bi_2MoO_6. Afterward, kinetics and probable reaction mechanismare investigated and analyzed. It is proved that photogenerated carrier can beseparated rapidly by tightly all-solid-state Z-scheme junction. This work canprovide a sight for finding controllable synthesis route of obtaining newlyefficient visible-light-driven Z-scheme photocatalysts.