Wang Yaoyao, Yang Jinhui, Zhang Zixuan, Zhao Pujuan, Chen Yuqing, Guo Yi, Luo Xiaogang
School of Chemical Engineering and Pharmacy, Key Laboratory of Novel Biomass-based Environmental and Energy Materials in Petroleum and Chemical Industry, Wuhan Institute of Technology, LiuFang Campus, No.206, Guanggu 1st road, Donghu New & High Technology Development Zone, Wuhan 430205, Hubei Province, PR China.
School of Materials Science and Engineering, Zhengzhou University, No.100 Science Avenue, Zhengzhou City 450001, Henan Province, PR China.
Int J Biol Macromol. 2024 Jun;269(Pt 2):131885. doi: 10.1016/j.ijbiomac.2024.131885. Epub 2024 Apr 28.
Ag-doped CuO immobilized carbon beads (Ag/CuO@CB) based composite photocatalysts have been prepared for the removal of levofloxacin, an antibiotic, from water. The photocatalysts were prepared by the processes of chemical reduction and in-situ solid-phase precipitation. The composite photocatalyst was characterized by a porous and interconnected network structure. Ag nanoparticles were deposited on CuO particles to develop a metal-based semiconductor to increase the catalytic efficiency of the system and the separation efficiency of the photogenerated carriers. Cellulose-derived carbon beads (CBs) can also be used as electron storage libraries which can capture electrons released from the conduction band of CuO. The results revealed that the maximum catalytic degradation efficiency of the composite photocatalyst for the antibiotic levofloxacin was 99.02 %. The Langmuir-Hinshelwood model was used to study the reaction kinetics, and the process of photodegradation followed first-order kinetics. The maximum apparent rate was recorded to be 0.0906 min. The mass spectrometry technique showed that levofloxacin degraded into carbon dioxide and water in the presence of the photocatalyst. The results revealed that the easy-to-produce photocatalyst was stable and efficient in levofloxacin removing.
已制备出基于银掺杂氧化铜固定化碳珠（Ag/CuO@CB）的复合光催化剂，用于去除水中的抗生素左氧氟沙星。这些光催化剂通过化学还原和原位固相沉淀工艺制备而成。该复合光催化剂具有多孔且相互连通的网络结构。银纳米颗粒沉积在氧化铜颗粒上，形成金属基半导体，以提高体系的催化效率和光生载流子的分离效率。纤维素衍生的碳珠（CBs）也可用作电子存储库，能够捕获从氧化铜导带释放的电子。结果表明，该复合光催化剂对抗生素左氧氟沙星的最大催化降解效率为99.02%。采用朗缪尔 - 欣谢尔伍德模型研究反应动力学，光降解过程遵循一级动力学。记录的最大表观速率为0.0906 min⁻¹。质谱技术表明，在光催化剂存在下，左氧氟沙星降解为二氧化碳和水。结果表明，这种易于制备的光催化剂在去除左氧氟沙星方面稳定且高效。
