硫黄
等离子体
兴奋剂
碳纤维
可见光谱
水下
材料科学
环境化学
化学
光化学
化学工程
光电子学
冶金
物理
量子力学
复合数
工程类
复合材料
海洋学
地质学
作者
Ha‐Rim An,Chaehun Lim,Chung Gi Min,Byoungchul Son,Chang-Yeon Kim,Ji-In Park,Jong Pil Kim,Youn-Joong Jeong,Jiwon Seo,Moonsang Lee,Jihyang Park,Young-Seak Lee,Hyun Uk Lee
出处
期刊:Chemosphere
[Elsevier]
日期:2024-05-01
卷期号:355: 141859-141859
标识
DOI:10.1016/j.chemosphere.2024.141859
摘要
To promptly and simply create highly crystalline S/C co-doped TiO2 (SC-TiO2) photocatalysts at room temperature and atmospheric pressure, we suggest a novel plasma-assisted sol-gel synthesis method. This method is a simultaneous synthetic process, in which an underwater plasma undergoes continuous reactions to generate high-energy atomic and molecular species that enable TiO2 to achieve crystallinity, a large surface area, and a heterogeneous structure within a few minutes. In particular, it was demonstrated that the heterogeneously structured TiO2 was formed by doping that sulfur and carbon replace O or Ti atoms in the TiO2 lattice depending on the composition of the synthesis solution during underwater plasma treatment. The resultant SC-TiO2 photocatalysts had narrowed bandgap energies and extended optical absorption scope into the visible range by inducing the intermediate states within bandgap due to generation of oxygen vacancies on the surface of TiO2 through synthesis, crystallization, and doping. Correspondingly, SC-TiO2 showed a significant degradation efficiency ([k] = 6.91 h−1) of tetracycline (TC, antibiotics) under solar light irradiation, up to approximately 4 times higher compared to commercial TiO2 ([k] = 1.68 h−1), resulting in great water purification. Therefore, we anticipate that this underwater discharge plasma system will prove to be an advantageous technique for producing heterostructural TiO2 photocatalysts with superior photocatalytic efficiency for environmental applications.
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