Efficient activation of persulfate decomposition by Cu2FeSnS4 nanomaterial for bisphenol A degradation: Kinetics, performance and mechanism studies
Efficient activation of persulfate decomposition by Cu2FeSnS4 nanomaterial for bisphenol A degradation: Kinetics, performance and mechanism studies
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Cu2FeSnS4 纳米材料有效激活过硫酸盐分解降解双酚 A：动力学、性能和机理研究
DOI：
10.1016/j.apcatb.2019.04.069
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发表时间：
2019-09
期刊：
影响因子：
--
通讯作者：
Zhan Jinhua
中科院分区：
文献类型：
--
作者：
Kong Lingshuai;Fang Guodong;Chen Yufeng;Xie Meng;Zhu Feng;Ma Long;Zhou Dongmei;Zhan Jinhua
采用花状Cu 2FeSnS 4（CFTS）纳米材料活化过硫酸盐（PS）降解模拟工业废水中的双酚A（BPA）。研究了CFTS对PS的降解效率和SO 4自由基dot−对污染物的降解机理。结果表明，CFTS催化PS分解的效率高于单质Cu/Fe/Sn硫化物，且在较宽的pH范围内都表现出活性。电子自旋共振谱，X-射线光电子能谱，和自由基淬灭实验揭示了一个串联的协同效应，铜，铁，锡在其四元硫属化物系统PS激活后。Cu、Fe和Sn之间的内在电子转移，特别是S与Fe（II）络合后形成的三键Fe（II）* 物种，克服了M（n+1）+/Mn+氧化还原循环的抑制作用。CFTS显示出作为废水处理催化剂的前景。
In this study, a flower-like Cu2FeSnS4(CFTS) nanomaterial was applied to the activation of persulfate (PS) for the degradation of bisphenol A (BPA) in model industrial wastewater. The efficiency of PS decomposition by CFTS, and the mechanism of contaminant degradation by SO4radical dot−were investigated. The results revealed that CFTS catalyzes PS decomposition more efficiently than the monometallic Cu/Fe/Sn sulfides and exhibits activity over a wide pH range. Electron spin resonance spectroscopy, X-ray photoelectron spectroscopy, and free radical quenching experiments revealed a tandem synergistic effect between Cu, Fe, and Sn in their quaternary chalcogenide systems upon PS activation. The intrinsic electron transfer between Cu, Fe and Sn, especially the triple bondFe(II)* species formed upon the complexation of Fe(II) by S on the surface of the CFTS, overcomes the inhibition of the M(n+1)+/Mn+redox cycle. CFTS shows promise as a catalyst for wastewater treatment.
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