Magnetic Fe3O4–N-doped carbon sphere composite for tetracycline degradation by enhancing catalytic activity for peroxymonosulfate: A dominant non-radical mechanism

化学 催化作用 电子顺磁共振 降级(电信) 激进的 单线态氧 复合数 核化学 光催化 氧气 有机化学 材料科学 核磁共振 复合材料 物理 电信 计算机科学
作者
Hanwen Yang,Jie Zhou,Enxiang Yang,Huanxuan Li,Shengji Wu,Wei Yang,Hui Wang
出处
期刊:Chemosphere [Elsevier BV]
卷期号:263: 128011-128011 被引量:62
标识
DOI:10.1016/j.chemosphere.2020.128011
摘要

Abstract The design of sustainable, effective and recyclable hybrid catalysts for advanced oxidation processes is highly significant for remediation of the water environment. In this study, we synthesized magnetic Fe3O4–N-doped carbon sphere composite catalysts (Fe3O4-NCS-x) for efficient removal of tetracycline by activating peroxymonosulfate (PMS). The Fe3O4-NCS-x composite was obtained by facile hydrothermal treatment of chitosan-iron complexes followed by pyrolysis. The unique structure of N-doped carbon spheres embedded in Fe3O4 nanoparticles intensified the electron transport, consequently improving the catalytic activity via a synergistic effect. Factors influencing the catalytic activity of the Fe3O4-NCS-2 were systematically investigated. High degradation efficiency of TC—97.1% within 1 h—was achieved in this Fe3O4-NCS-2/PMS system under the optimum conditions (C0 = 20 mg L−1, catalyst dosage 0.2 g L−1, PMS concentration 2.4 mM, native pH and 25 °C). The inhibitory effect of anions in the water matrix decreased in the order Cl− > NO3− > SO42− > CH3COO− > HCO3−. The obtained results from the competitive quenching tests and electron paramagnetic resonance measurements demonstrated that singlet oxygen (1O2), a non-radical species, plays a major role in TC degradation. It is estimated that 1O2 and hydroxyl radicals (·OH) contributed ∼65.2% and ∼24.2% to TC degradation in the Fe3O4-NCS-2/PMS system, respectively. The M-H hysteresis loop of Fe3O4-NCS-2 revealed that its saturation moment is 56 emu g−1. Magnetic responsive behavior and consecutive runs confirmed that Fe3O4-NCS-2 possesses remarkable separation performance and desirable reusability. This novel magnetic Fe3O4-NCS-2 composite activator for PMS promises great potential in TC degradation.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
量子星尘发布了新的文献求助10
1秒前
结实的幽魂完成签到,获得积分10
2秒前
Rondab应助zz采纳,获得30
2秒前
单纯的冬灵完成签到 ,获得积分10
3秒前
5秒前
6秒前
肥猫发布了新的文献求助10
6秒前
6秒前
可爱的函函应助过氧化氢采纳,获得30
9秒前
9秒前
锦鲤完成签到 ,获得积分10
10秒前
任性的白玉完成签到 ,获得积分10
10秒前
youwenjing11发布了新的文献求助10
11秒前
山谷完成签到 ,获得积分10
11秒前
钱宇成发布了新的文献求助10
12秒前
科研通AI2S应助感动黄豆采纳,获得10
16秒前
20秒前
21秒前
24秒前
Fengliguantou发布了新的文献求助10
24秒前
猪猪hero发布了新的文献求助10
26秒前
Winner发布了新的文献求助10
28秒前
隐形曼青应助科研通管家采纳,获得10
28秒前
领导范儿应助科研通管家采纳,获得10
28秒前
Lucas应助科研通管家采纳,获得30
29秒前
29秒前
圆锥香蕉应助科研通管家采纳,获得20
29秒前
科研通AI2S应助科研通管家采纳,获得10
29秒前
科研通AI2S应助科研通管家采纳,获得10
29秒前
科目三应助科研通管家采纳,获得10
29秒前
充电宝应助科研通管家采纳,获得10
29秒前
脑洞疼应助科研通管家采纳,获得10
29秒前
科研通AI5应助科研通管家采纳,获得10
29秒前
852应助科研通管家采纳,获得10
29秒前
科研通AI2S应助科研通管家采纳,获得10
29秒前
科研通AI2S应助科研通管家采纳,获得10
29秒前
情怀应助科研通管家采纳,获得10
30秒前
30秒前
感动黄豆发布了新的文献求助10
30秒前
33秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989115
求助须知:如何正确求助?哪些是违规求助? 3531367
关于积分的说明 11253688
捐赠科研通 3269986
什么是DOI,文献DOI怎么找? 1804868
邀请新用户注册赠送积分活动 882078
科研通“疑难数据库(出版商)”最低求助积分说明 809105