School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China.
School of Science, Jiangsu University of Science and Technology, Zhenjiang, 212003, China.
Environ Res. 2023 Sep 1;232:116311. doi: 10.1016/j.envres.2023.116311. Epub 2023 Jun 7.
The organic pollutants in industrial wastewater continuously endanger human health. Therefore, effective treatment of organic pollutants is very urgent. Photocatalytic degradation technology is an excellent solution to remove it. TiO photocatalysts are easy to prepare and have high catalytic activity, unfortunately, TiO only absorbs ultraviolet light limiting its utilization of visible light. In this study, a facile environmentally friendly synthesis of Ag-coated on micro-wrinkled TiO-based catalysts in order to extend the absorption of Visible light. Firstly, a fluorinated titanium dioxide precursor was prepared by a one-step solvothermal method, and the precursor was calcined at high temperature in a nitrogen atmosphere to form a carbon dopant, and then a surface silver-deposited carbon/fluorine co-doped TiO photocatalyst C/F-Ag-TiO was prepared by a hydrothermal method The results showed that the Ag was coated on the wrinkled TiO layer and C/F-Ag-TiO photocatalyst was synthetized successfully. Benefit from the synergistic effect of doped carbon and fluorine atoms in combination with the quantum size effect of the surface silver nanoparticles, the band gap energy of C/F-Ag-TiO (2.56 eV) is obviously lower than anatase (3.2eV). The photocatalyst achieved an impressive degradation rate of 84.2% for Rhodamine B in 4 h, with a degradation rate constant of 0.367 h, which was 17 times higher than that of P25 under visible light. Therefore, the C/F-Ag-TiO composite is a promising candidate as a highly efficient photocatalyst for environmental remediation.
工业废水中的有机污染物不断危害着人类健康。因此，有效处理有机污染物迫在眉睫。光催化降解技术是去除有机污染物的一种极好的方法。TiO 光催化剂易于制备且具有高催化活性，但 TiO 仅吸收紫外光，限制了其对可见光的利用。在本研究中，通过简便的环保方法合成了 Ag 修饰的微皱纹 TiO 基催化剂，以扩展可见光的吸收。首先，通过一步溶剂热法制备了氟化钛前驱体，然后将前驱体在氮气气氛中高温煅烧形成碳掺杂剂，然后通过水热法制备了表面银沉积碳/氟共掺杂 TiO 光催化剂 C/F-Ag-TiO。结果表明，Ag 被包覆在皱纹 TiO 层上，成功合成了 C/F-Ag-TiO 光催化剂。得益于掺杂碳和氟原子的协同效应以及表面银纳米粒子的量子尺寸效应，C/F-Ag-TiO 的带隙能（2.56 eV）明显低于锐钛矿（3.2 eV）。该光催化剂在 4 h 内对 Rhodamine B 的降解率达到 84.2%，降解速率常数为 0.367 h，在可见光下的降解速率常数是 P25 的 17 倍。因此，C/F-Ag-TiO 复合材料是一种很有前途的高效光催化剂，可用于环境修复。
