Highly efficient catalysis of chalcopyrite with surface bonded ferrous species for activation of peroxymonosulfate toward degradation of bisphenol A: A mechanism study
Highly efficient catalysis of chalcopyrite with surface bonded ferrous species for activation of peroxymonosulfate toward degradation of bisphenol A: A mechanism study
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表面键合亚铁物质的黄铜矿高效催化过一硫酸盐活化以降解双酚 A：机制研究
DOI：
10.1016/j.jhazmat.2018.09.078
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发表时间：
2019-02-15
影响因子：
13.6
通讯作者：
Tang, Heqing
中科院分区：
文献类型：
--
作者：
Nie, Wenshan;Mao, Qihang;Tang, Heqing
成功地制备了富含表面键合亚铁的黄铜矿纳米粒子(CuFeS2 NPs)，并对其进行了表征，并将其用于过一硫酸盐(PMS)的活化和BPA的降解。系统考察了初始pH、催化剂用量、PMS浓度、双酚A初始浓度和反应温度等反应参数对CuFeS2-PMS体系降解双酚A的影响。作为一种双金属硫化物，CuFeS2比Cu2S、FeS2、CuFeO2和Co3O4表现出超高的经前综合征激活活性。结果表明，当0.1g L-1CuFeS2和0.3mmolL-1PMS联合使用时，20 mg L-1双酚A在20min内几乎完全降解(99.7%)，矿化率达到75%。CuFeS2的高催化活性与两个方面密切相关：一是催化剂中的S2-促进了Fe3+/Fe2+和Cu2+/Cu2+在PMS活化中的循环；二是Fe3+/Fe2+和Cu2+/Cu+循环在PMS活化中的协同作用。这些有趣的发现为金属硫化物的开发提供了一些新的见解，用于有机污染物的氧化处理。
Chalcopyrite nanoparticles (CuFeS2 NPs) with abundant surface bonded ferrous were successfully prepared, characterized and used as a catalyst for peroxymonosulfate (PMS) activation and BPA degradation. The effect of reaction parameters such as initial pH, catalyst load, PMS concentration, initial BPA concentration and reaction temperature on BPA degradation in CuFeS2-PMS system was systematically investigated. As a bimetallic sulfide, CuFeS2 exhibits ultra-high activity for PMS activation compared with Cu2S, FeS2, CuFeO2 and Co3O4. It was found that by co-use of 0.1 g L-1 CuFeS2 and 0.3 mmol L-1 PMS, 20 mg L-1 of BPA was almost completely degraded (99.7%) and reached a mineralization rate of 75% within 20 min. The highly catalytic activity of CuFeS2 is closely related to two aspects: one is that S2- in the catalysts promotes the cycling of Fe3+/Fe2+ and Cu2+/Cu+ cycles on the surface, and the other is the synergistic effect of Fe3+/Fe2+ and Cu2+ /Cu+ cycles in the PMS activation. These interesting findings shed some new insight on the development of metal sulfides for the oxidative treatment of organic contaminants.