Sulfate radicals induced degradation of tetrabromobisphenol A with nanoscaled magnetic CuFe2O4 as a heterogeneous catalyst of peroxymonosulfate
Sulfate radicals induced degradation of tetrabromobisphenol A with nanoscaled magnetic CuFe2O4 as a heterogeneous catalyst of peroxymonosulfate
复制标题
纳米级磁性 CuFe2O4 作为过一硫酸盐非均相催化剂，硫酸根诱导四溴双酚 A 降解
DOI：
10.1016/j.apcatb.2012.09.015
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发表时间：
2013-01-17
影响因子：
22.1
通讯作者：
Tang, Heqing
中科院分区：
文献类型：
--
作者：
Ding, Yaobin;Zhu, Lihua;Tang, Heqing
以硝酸铜、硝酸铁为金属前驱体，柠檬酸为络合剂，采用溶胶-凝胶燃烧法制备了 CuFe2O4 磁性纳米颗粒（MNPs）。通过扫描电镜、X射线衍射、傅里叶变换红外光谱、傅里叶变换拉曼光谱和X射线光电子能谱对所得CuFe2O4 MNPs进行了表征。研究发现CuFe2O4 MNPs可以有效催化过一硫酸盐(PMS)产生硫酸根(SO4中心点-)降解四溴双酚A(TBBPA)。使用0.1 g·L-1 CuFe2O4 MNPs和0.2 mmol·L-1 PMS在30分钟内几乎完全去除添加的TBBPA（10 mg·L-1）（去除率99%）。随着 PMS (1.5 mmol L-1) 添加量的增加，降解后 TOC 去除率为 56%，TBBPA 脱溴率为 67%。催化剂焙烧温度、催化剂负载量的影响。研究了PMS浓度和反应温度对CuFe2O4 MNPs催化活性的影响。 CuFe2O4 MNPs 的高催化活性可能涉及 CuFe2O4 MNPs 中 Cu(II) 和 Fe(III) 对 PMS 的激活。基于中间检测，提出了CuFe2O4 MNPs/PMS体系中TBBPA的降解途径。 (C) 2012 Elsevier B.V. 保留所有权利。
CuFe2O4 magnetic nanoparticles (MNPs) were prepared by sol-gel combustion method with copper and iron nitrates as metal precursors and citrate acid as a complex agent. The obtained CuFe2O4 MNPs were characterized by scanning electron microscopy, X-ray diffractometry, Fourier transform infrared spectroscopy, Fourier transform Raman spectroscopy and X-ray photoelectron spectroscopy. It was found that CuFe2O4 MNPs could effectively catalyze peroxymonosulfate (PMS) to generate sulfate radicals (SO4 center dot-) to degrade tetrabromobisphenol A (TBBPA). The added TBBPA (10 mg L-1) was almost completely removed (with a removal of 99%) in 30 min by using 0.1 g L-1 CuFe2O4 MNPs and 0.2 mmol L-1 PMS. With higher addition of PMS (1.5 mmol L-1), the degradation yielded a TOC removal of 56% and a TBBPA debromination ratio of 67%. The effect of catalyst calcination temperature, catalyst load. PMS concentration and reaction temperature was investigated on the catalytic activity of CuFe2O4 MNPs. The highly catalytic activity of CuFe2O4 MNPs possibly involved the activation of PMS by both Cu(II) and Fe(III) in CuFe2O4 MNPs. Based on intermediate detections, the degradation pathway of TBBPA in the CuFe2O4 MNPs/PMS system was proposed. (C) 2012 Elsevier B.V. All rights reserved.