Heterogeneous activation of peroxymonosulfate for bisphenol A degradation using CoFe2O4 derived by hybrid cobalt-ion hexacyanoferrate nanoparticles
Heterogeneous activation of peroxymonosulfate for bisphenol A degradation using CoFe2O4 derived by hybrid cobalt-ion hexacyanoferrate nanoparticles
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使用杂化钴离子六氰基铁酸盐纳米颗粒衍生的 CoFe2O4 异相活化过一硫酸盐降解双酚 A
DOI：
10.1016/j.cej.2020.127052
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发表时间：
2021-01
影响因子：
15.1
通讯作者：
Lei Qin
中科院分区：
文献类型：
--
作者：
Long Xinxin;Yang Shengjiong;Qiu Xiaojie;Ding Dahu;Feng Chuanping;Chen Rongzhi;Tan Jihua;Wang Xinming;Chen Nan;Lei Qin
以六氰合铁酸钴（CoFeHCF）纳米粒子为模板，采用共沉淀-热分解法制备了具有介孔结构的尖晶石型钴铁氧体CoFe 2 O 4纳米粒子。合成的催化剂的性能证明了各种表征方法。考察了时间、pH值、催化剂/氧化剂/BPA用量、共存离子和天然有机物（NOM）对双酚A（BPA）催化降解的影响。合成的CoFe 2 O 4对45 μM双酚A在40 min内的去除率可达97%。CoFe 2 O 4纳米粒子的高比表面积（66.18 m2/g）和高钴含量（Fe/Co原子比为1.86）是其优异催化性能的主要原因。微碱性的pH值、较高的催化剂用量以及Cl−和CO 32 −/HCO 3 −等阴离子有利于BPA的降解。在优化条件下，BPA在60 min内的矿化率可达81.57%.在远低于晶化温度的200℃下，CoFe 2 O 4的催化活性可以通过简单的洗涤和干燥得到再生。SO 4 −和HO是BPA氧化的主要反应物种，而SO 4 −可能起主导作用。该研究为制备CoFe 2 O 4纳米催化剂提供了一种新的方法，为CoFeHCF在环境中的应用提供了新的思路。
A facile coprecipitation-thermal method is reported to prepare spinel cobalt ferrites CoFe2O4nanoparticles (NPs) with a well-defined mesoporous dominated structure using hybrid cobalt-ion hexacyanoferrate (CoFeHCF) NPs as a template. The properties of the synthesized catalysts are evidenced by various characterization methods. And the effects of time, pH, catalyst/oxidant/BPA dosage, coexisting ions and natural organic matter (NOM) on catalytic degradation of bisphenol A (BPA) are investigated. The as-prepared CoFe2O4shows a high catalytic performance of 97% elimination for 45 μM BPA in 40 min. The excellent catalytic performance could be attributed to the large specific surface area (66.18 m2/g) and high content of cobalt (the atomic ratio of Fe/Co is 1.86) of CoFe2O4NPs. Slightly alkaline pH, higher catalyst dosage and anions including Cl−and CO32−/HCO3−are favorable for BPA degradation. Especially, 81.57% mineralization of BPA could be achieved in 60 min under the optimization system. The catalytic capacity of CoFe2O4could be regenerated by simple washing and drying at 200℃, which is much lower than the crystal temperature. SO4∙−and HO∙ are the primary reactive species responsible for BPA oxidation while SO4∙−might play a dominant role. This work provides a novel method to produce CoFe2O4nanocatalysts for contaminant degradation and encourage the extended application of CoFeHCF in the environment.
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影响因子：
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影响因子：
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