Highly Intensified Molecular Oxygen Activation on Bi@Bi2MoO6 via a Metallic Bi-Coordinated Facet-Dependent Effect
Highly Intensified Molecular Oxygen Activation on Bi@Bi2MoO6 via a Metallic Bi-Coordinated Facet-Dependent Effect
复制标题
通过金属双配位面依赖性效应对 Bi@Bi2MoO6 进行高度强化的分子氧活化
DOI：
10.1021/acsami.9b17623
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Hao Chen
中科院分区：
文献类型：
--
作者：
Xiao Xu;Nan Yang;Pei Wang;Shengyao Wang;Yonggang Xiang;Xiaohu Zhang;Xing Ding;Hao Chen
Construction of the semimetal/semiconductor composite interface is widely used to promote the O2molecule adsorption and charge transfer for boosting solar-driven molecular oxygen activation (MOA). Herein, a Bi@Bi2MoO6heterostructure is fabricated via a two-step wet chemical method as a typical photocatalyst to investigate the underlying mechanism of Bi-coordinated facet-dependent MOA under visible-light illumination. Density functional theory and systematical characterization methods reveal the distinct charge transfer and O2activation processes on the surface of Bi nanoparticle-deposited Bi2MoO6nanosheets with different facets exposed. By virtue of a particular and efficient [Bi2O2]2+→ Bi → MoO42–interfacial charge-transfer channel, Bi deposited on the (001) facet of Bi2MoO6can observably intensify MOA, thereby giving birth to more generation of reactive oxygen species and endowing the Bi@Bi2MoO6with excellent photocatalytic performance in sodium pentachlorophenate (NaPCP) removal. The decomposition pathway of NaPCP is also proposed based on the intermediate determination and mineralization analysis. This work provides deep insights into the mechanism of facet-dependent MOA over a semimetal–semiconductor system and also sheds light on designing effective molecular oxygen-activated interface for environmental remediation.
