功能性生物炭通过特定的B-C-N配置加速过氧硫酸盐的激活,用于通过特定的B-C-N配置降解有机污染物
Minghui Pan1, Zhenli He2, Xiaoe Yang1
1Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, 310058, Hangzhou, China.
Chemosphere
|September 1, 2024
概括
来自植物残留物的功能生物炭,添加和,有效地激活过氧硫酸盐 (PMS) 进行污染物降解. 这种新材料为先进的氧化过程提供了一种可持续的方法.
科学领域:
- 环境化学环境化学
- 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:
- 异原子合生物炭增强过氧硫酸盐 (PMS) 激活,用于污染物降解.
- 超蓄积器植物残留物为功能生物炭合成提供了一个可持续的来源.
研究的目的:
- 从Sedum alfredii残留物中合成和表征和联合的生物炭.
- 为了研究功能生物炭在激活PMS中酸7 (AO7) 降解的催化性能.
- 阐明反应机制,并确定负责污染物降解的关键活性点.
主要方法:
- 用和对Sedum alfredii衍生生物炭进行序列性注.
- 使用PMS和AO7作为模型污染物的催化降解实验.
- 电化学分析,现场拉曼光谱学和密度函数理论 (DFT) 计算以探测反应机制和活性位点.
主要成果:
- SABC-B@N-2生物炭对PMS激活表现出卓越的催化活性 (k obs = 0.0655 min-1),比原始生物炭高6.75倍.
- 在低PMS度 (0.1mM) 中,AO7的矿化率达到了71.98%.
- 联合兴奋剂转移了降解途径,使其转向由电子转移主导的非激进过程,并确定了特定的 BCN 配置 (BC2O 和 pyridinic-N) 作为关键活性位点.
结论:
- 从高蓄积器残留物中获得的联合化生物炭是PMS激活的高效催化剂,为污染物降解提供了一种高效和可持续的方法.
- 该研究阐明了降解机制,强调了电子转移和特定活性位点在单片氧上的作用.
- 这项研究通过将植物废物转化为有价值的催化材料,提供了一种可持续的植物补救策略.
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