Construction of a Bioinspired Hierarchical BiVO4/BiOCl Heterojunction and Its Enhanced Photocatalytic Activity for Phenol Degradation

作者：Qian Su, Lulu Zhu, Mingrui Zhang, Yao Li, Siyuan Liu, Jingyi Lin, Fang Song, Wang Zhang, Shenmin Zhu, Jian Sheng Pan · 发表于：ACS Applied Materials & Interfaces · 年份：2021 · DOI：10.1021/acsami.1c05117 · 被引用次数：114 · 研究领域：Advanced Photocatalysis Techniques、Gas Sensing Nanomaterials and Sensors、Ga2O3 and related materials

Development of a p–n heterojunction to achieve efficient degradation of organic pollutants is a promising approach in the field of photocatalysis. Herein, BiVO 4 with bioinspired hierarchical structures was prepared with the sol–gel method and combined with BiOCl nanoplates to construct a 3D/2D configuration via an in situ deposition route. The hierarchical BiVO 4 served as an excellent substrate to achieve the uniform loading of BiOCl nanoplates. The obtained 3D/2D BiVO 4 /BiOCl hybrids exhibited significantly enhanced photocatalytic efficiency for degrading phenol under visible light irradiation, with a first-order reaction rate constant that was 9.9 and 1.9 times higher than those of hierarchical BiVO 4 and the BiVO 4 /BiOCl hybrids without hierarchical structures, respectively. Moreover, the hierarchical BiVO 4 /BiOCl also displayed good photochemical stability for the degradation of phenol after three recycles. The p–n heterojunction and hierarchical structure worked together to form a spatial conductive network framework, which possessed improved visible light absorption, high specific surface area, as well as effective separation and transfer of photogenerated charge carriers.