肖彤,马捷,王雁,赵燊,张娟娟,张来齐,赵旭.铁改性掺氮碳纤维活化过一硫酸盐降解双酚A[J].环境科学学报,2021,41(7):2766-2773
铁改性掺氮碳纤维活化过一硫酸盐降解双酚A
- Degradation of bisphenol A by activation of peroxymonosulfate by Fe modified N-doped carbon fiber
- 基金项目：国家重点研发计划（No.2016YFA0203101）
- 肖彤
- 1. 北京工业大学材料与制造学部, 北京 100124;2. 中国科学院生态环境研究中心, 环境水质学国家重点实验室, 北京 100085
- 马捷
- 北京工业大学材料与制造学部, 北京 100124
- 王雁
- 中国科学院生态环境研究中心, 环境水质学国家重点实验室, 北京 100085
- 赵燊
- 中国科学院生态环境研究中心, 环境水质学国家重点实验室, 北京 100085
- 张娟娟
- 中国科学院生态环境研究中心, 环境水质学国家重点实验室, 北京 100085
- 张来齐
- 中国科学院生态环境研究中心, 环境水质学国家重点实验室, 北京 100085
- 赵旭
- 中国科学院生态环境研究中心, 环境水质学国家重点实验室, 北京 100085
- 摘要：通过静电纺丝制备了Fe和N掺杂改性的碳纳米纤维（Fe-N-CNF），研究了该催化剂活化过一硫酸盐（PMS）降解双酚A（BPA）的性能.以聚丙烯腈为前驱体通过添加FeCl3、尿素、NH4Cl、均苯四甲酸二酐等配制溶胶进行静电纺丝，预氧化并高温碳化后获得Fe-N-CNF，研究了Fe-N-CNF投加量、PMS投加量、溶液初始pH对BPA降解效果的影响.结果表明，当Fe-N-CNF投加量为1 g·L-1，PMS投加量为2 mmol·L-1，初始pH为5时，30 min内对初始浓度为20 mg·L-1 BPA的降解率可达100%.自由基淬灭实验和电子自旋共振波谱（ESR）分析证明，该体系中起主要作用的活性氧物种是O2·-和1O2.同时研究了Fe-N-CNF/PMS体系对多种有机污染物的降解效果.
- Abstract：Fe and N doped carbon nanofibers (Fe-N-CNF) were prepared by electrospinning, and their degradation performance of bisphenol A (BPA) with the activation of peroxymonosulfate (PMS) was studied. The electrospinning sols were prepared by using polyacrylonitrile as the precursor, with adding FeCl3, urea, NH4Cl, and pyromellitic dianhydride. Then the sols were electrospun to obtain the precursor fibers, and after their pre-oxidation and carbonization at high temperatures, the Fe-N-CNF was obtained. The effects of Fe-N-CNF dosages, PMS dosages, initial solution pH on the degradation of BPA were investigated. The experimental results showed that the degradation efficiency of BPA was 100% within 30 min at the condition of 1 g·L-1 Fe-N-CNF, 2 mmol·L-1 PMS, initial pH 5 and the initial BPA concentration of 20 mg·L-1. The radical quenching experiments and electron spin resonance spectroscopy (ESR) results showed that O2·- and 1O2 were the main reactive oxygen species in this system. The degradation effects on a variety of organic pollutants by the Fe-N-CNF /PMS system were also studied.
