Construction of TiO2–x Confined by Layered Iron Silicate toward Efficient Visible-Light-Driven Photocatalysis–Fenton Synergistic Removal of Organic Pollutants

• DOI: 10.1021/acsami.3c01981
• Publication Date: 2023-05-05T06:43:41Z
• Authors: Chen Hou; Lan Wang; Wei Zhang; Zhiqiang Zhu; Shiwei Lu; Fujun Zou; Chuanyi Wang
• Keywords: Visible spectrum

The photocatalysis-Fenton synergistic reaction has great potential for water purification but generally suffers from unsatisfactory electron transfer due to an undesirable interface structure. Herein, we developed a novel heterojunction of oxygen vacancy-rich TiO2-x confined in the layer space synthetic montmorillonite-like iron silicate (denoted as TiO2-x/FeMMT) that addresses issue mentioned above. Two-dimensional layered silicates heterojunctions support not only provided more active sites also induced vacancies through interfacial effects enhance visible-light harvesting ability. Notably, such loading donor accelerated Fe(III)/Fe(II) redox cycling and facilitated effective activation H2O2, while Fe(III) trap greatly improved separation photogenerated electron-hole pairs. More interestingly, internal electric field (Vo) existing at realized directional migration electrons energy band structure heterojunction, respectively. Eventually, TiO2-x/FeMMT composites exhibited superior performance toward degradation removal phenol, dinotefuran (DIN), sulfamethoxazole (SMX) under irradiation. This paves way rational design high-efficiency catalysts based on environment-related applications.