在调节生物质碳纤维上构建有序的电子传输通道,用于选择性ROS生成和水污染清除
Wei Liu1, Yingbo Dong2, Junfei Liu2
1School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Journal of hazardous materials
|November 17, 2023
概括
添加碳纤维 (B-CF) 通过硫酸激活有效地去除抗生素污染,产生关键的活性氧物种,用于增强水净化. 这种环保的催化剂具有高容量,稳定性和广泛的pH效率.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 由于其持久性和毒性,抗生素污染对环境和公共卫生构成重大风险.
- 无金属异质催化提供了一个有希望的,环保的方法来降解有机污染物.
- 来自生物质的碳材料为先进的催化应用提供了可持续的平台.
研究的目的:
- 合成添加碳纤维 (B-CF),以有效地从水中去除有机污染物.
- 为了研究 norfloxacin 降解中涉及的催化机制和反应性氧物种 (ROS).
- 评估B-CF/硫酸盐 (PDS) 系统的性能,稳定性和运行范围.
主要方法:
- 添加生物质碳纤维 (B-CF) 的合成.
- 系统的火实验和电子磁共振 (EPR) 检测以确定ROS.
- 吸附研究,催化降解试验,电化学分析和理论计算.
- 在广泛的pH范围和长期稳定性测试中评估B-CF/PDS系统性能.
主要成果:
- B-CF 显示出对诺夫洛克萨 (834.4 mg g-1) 的高吸附能力.
- B-CF/PDS系统选择性地产生超氧化基 (O2−·) 和单片氧 (1O2) 作为Norfloxacin降解的主要ROS.
- 观察到NOR,B-CF和PDS之间的强烈电子转移,增强了ROS生成.
- 该系统在广泛的pH范围 (3-11) 中保持了超过80%的效率超过274小时.
结论:
- B-CF作为有效的无金属催化剂来激活硫酸盐,导致抗生素污染物的降解.
- 该研究阐明了选择性ROS生成机制,解决了基于硫酸盐的系统中的催化剂失活问题.
- 开发的B-CF/PDS系统为先进的水净化提供了强大而可持续的技术.
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