InP quantum dots on g-C3N4 nanosheets to promote molecular oxygen activation under visible light

• 作 者: Yuehan Cao Qian Zheng Zhiqiang Rao Ruiyang Zhang Zhanghui Xie Shan Yu Ying Zhou
• 机 构: State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum Universi
• 出 处: 中国化学快报（英文版）
• 发表日期: 2020年10期
• 关键词: InP quantum dots g-C3N4 nanosheets Molecular oxygen activation O-O- N-O intermed

Largely limited by the high dissociation energy of the O--O bond, the photocatalytic molecular oxygen activation is highly challenged, which restrains the application of photocatalytic oxidation technology for atmospheric pollutants removal. Herein, we design and fabricate the InP QDs/g-C3N4 compounds. The introduction of InP QDs promotes the charge transfer within the interface resulting in the effective separation of photo-generated carriers. Furthermore, InP QDs greatly facilitates the activation of molecular oxygen and promote the formation of O2 ?-under visible-light illumination. These conclusions are identified by experimental and calculation results. Hence, NO can be combined with the O2 ?-to form O--O--N--O intermediate to direct conversion into NO3 -. As a result, the NO removal ratio of g-C3N4 has a onefold increase after InP QDs loaded and the generation of NO2 is effectively inhibited. This work may provide a strategy to design highly efficient materials for molecular oxygen activation.