非贵金属催化电极Ni/C@CF的制备及绿色类Fenton性能  

Preparation of Non-noble Metal Catalytic Electrode Ni/C@CF and Its Green Fenton Performance

作　　者：成施雨 杨灵 包芮于 陈宸 崔萌萌 张谷令[3] 李华[1,2] CHENG Shiyu;YANG Ling;BAO Ruiyu;CHEN Chen;CUI Mengmeng;ZHANG Guling;LI Hua(Key Laboratory of Ecology and Environment in Minority Areas,National Ethnic Affairs Commission,Minzu University of China,Beijing 100081,China;College of Life and Environmental Sciences,Minzu University of China,Beijing 100081,China;College of Science,Minzu University of China,Beijing 100081,China)

机构地区：[1]中央民族大学民族地区生态环境国家民委重点实验室,北京100081 [2]中央民族大学生命与环境科学学院,北京100081 [3]中央民族大学理学院,北京100081

出　　处：《高等学校化学学报》2024年第2期125-132,共8页Chemical Journal of Chinese Universities

基　　金：国家民委民族地区生态与环境重点实验室开放课题(批准号:KLEEMA202303)资助。

摘　　要：传统芬顿(Fenton)法利用Fe2+催化H_(2)O_(2)产生具有强氧化性的羟基自由基(•OH),可以高效氧化降解水中有机污染物,但其操作pH范围窄(pH≈3)和易产生铁絮凝沉淀的缺点限制了其应用发展.原子氢H*作为一种单电子供体,可以将电子快速转移到H_(2)O_(2)中,生成•OH,适用于广泛的pH值,没有铁污泥产生,是一种新型高效绿色芬顿法.然而,原子H*更易相互结合形成H_(2),极不稳定,因此,探索合适的电催化剂对H*绿色Fenton的应用起着至关重要的作用.本文以炭黑作为载体,通过液相还原法制备了具有催化活性高、性能稳定的Ni/C@碳毡(Ni/C@CF)非贵金属电催化材料,制备的Ni纳米粒子均匀分散在炭黑上.以此电极材料为阴极,构建绿色Fenton催化体系,能够催化H_(2)O和H+生成H*,进而催化H_(2)O_(2)产生•OH,高效降解去除水中抗生素污染物.通过调节制备方法、电压、溶液pH值及外加氧化剂量,确定了该体系下的最佳反应条件.The traditional Fenton process uses Fe2+to catalyze H_(2)O_(2) to produce strong oxidizing hydroxyl radical(•OH),which can efficiently oxidize and degrade organic matter.However,its operating pH range is narrow(pH:ca.3),the production of iron flocculation precipitation and other shortcomings limit its application and development.Atomic hydrogen H*,as a single electron donor,can quickly transfer electrons to H_(2)O_(2) to generate•OH,which is suitable for a wide range of pH values and does not produce iron sludge,and is an efficient green Fenton method.However,H*atoms are more likely to combine with each other to form H_(2),which is extremely unstable.Therefore,exploring suitable electrocatalysts plays a crucial role in the application of H*green Fenton.In this paper,Ni/C@CF electrocatalytic material with high catalytic activity and stable performance was successfully prepared by liquid phase reduction method using carbon black as the carrier.The prepared Ni nanoparticles were uniformly dispersed on carbon black.Using this electrode material as the cathode,a green Fenton catalytic system is constructed,which can catalyze water molecules(H_(2)O)and hydrogen ions(H3O+)to produce H*,so that it can catalyze the decomposition of H_(2)O_(2) to produce•OH,thus achieving the effect of degrading antibiotic pollutants.By adjusting the preparation method such as voltage,pH value of solution and the additional oxidation dose,the optimal reaction conditions of Ni/C catalyst degradation in this system were determined.In addition,Ni/C@CF composite material has good stability and can be recycled to realize rapid oxidation of green Fenton technology,which has many potential practical applications in wastewater treatment.

关 键 词：芬顿反应 原子氢 Ni/C@CF材料 电催化 有机污染物 

分 类 号：O643.3[理学—物理化学]