Activating peroxydisulfate with Co3O4/NiCo2O4 double-shelled nanocages to selectively degrade bisphenol A – A nonradical oxidation process
Activating peroxydisulfate with Co3O4/NiCo2O4 double-shelled nanocages to selectively degrade bisphenol A – A nonradical oxidation process
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DOI：
10.1016/j.apcatb.2020.119585
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发表时间：
2021-03
影响因子：
22.1
通讯作者：
Meimei Wang;Yunke Cui;Hongyan Cao;P. Wei;Chen Chen-Chen;Xiu-yan Li;Juan Xu;Guo-ping Sheng
中科院分区：
文献类型：
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作者：
Meimei Wang;Yunke Cui;Hongyan Cao;P. Wei;Chen Chen-Chen;Xiu-yan Li;Juan Xu;Guo-ping Sheng
本研究以咪唑骨架67（ZIF-67）分子筛为载体，制备了Co 3 O 4/NiCo 2 O 4双壳纳米笼（DSNCs），并将其用于催化过硫酸盐（PDS）降解双酚A（BPA）。结果表明，Co 3 O 4/NiCo 2 O 4 DSNCs对BPA的降解性能上级Co 3 O 4 NCs和NiCo 2 O 4 NCs。PDS与Co 3 O 4内壳层和NiCo 2 O 4外壳层的界面结合形成复合物，通过夺电子的方式诱导BPA的非自由基氧化。双层中空结构有助于提高Co 3 O 4/NiCo 2 O 4 DSNCs空隙中反应物的瞬时浓度，从而促进BPA的分解。Co 3 O 4/NiCo 2 O 4 DSNCs对BPA具有较高的降解选择性，且对卤素和废水中的背景有机物具有较好的耐受性。研究表明，金属有机骨架（MOF）衍生的中空结构纳米材料在过硫酸盐高级氧化技术中具有良好的应用前景。
In this study, zeolitic imidazolate framework-67 (ZIF-67) derived Co3O4/NiCo2O4double-shelled nanocages (DSNCs) were fabricated and utilized as catalysts to activate peroxydisulfate (PDS) for bisphenol A (BPA) degradation. The results showed that Co3O4/NiCo2O4DSNCs exhibited superior BPA degradation performance over Co3O4NCs and NiCo2O4NCs. PDS combined with the interfaces of both the Co3O4inner shell and NiCo2O4outer shell to form complex, inducing the nonradical oxidation of BPA by electron abstraction. The double-shelled hollow structure helped to increase the instantaneous concentration of reactants in the void space of Co3O4/NiCo2O4DSNCs, thus promoting the decomposition of BPA. The Co3O4/NiCo2O4DSNCs had high selectivity for BPA degradation and were resistant to halogens and background organic matter in wastewater. Our work indicated that metal-organic framework (MOF)-derived nanomaterials with a hollow structure have a promising application prospect for persulfate-based advanced oxidation technology.