MOFs衍生镍单原子材料电催化还原化学镀镍废水中的亚磷酸盐  

Electrocatalytic reduction of phosphite in wastewater discharged from electroless nickel plating process by using MOFs-derived nickel single-atom material

作　　者：吴秋宇 雷泽锐 张浩峰 杜建伟 文树龙 贺框 张明杨 黄凯华 WU Qiuyu;LEI Zerui;ZHANG Haofeng;DU Jianwei;WEN Shulong;HE Kuang;ZHANG Mingyang;HUANG Kaihua(College of Environment and Resources,Xiangtan University,Xiangtan 411105,China;South China Institute of Environmental Sciences,Guangzhou 510530,China)

机构地区：[1]湘潭大学环境与资源学院,湖南湘潭411105 [2]生态环境部华南环境科学研究所,广东广州510530

出　　处：《电镀与涂饰》2023年第21期73-84,共12页Electroplating & Finishing

摘　　要：通过水热合成和高温煅烧制备了一种具有电催化还原活性的MOFs(金属有机骨架化合物)衍生镍单原子材料(标记为Ni@NC),将其负载于石墨毡上用作化学镀镍废水中亚磷酸盐电催化还原为次磷酸盐的阳极,以实现化学镀镍工艺中磷的循环。分析了所得Ni@NC催化材料的微观形貌、晶体结构、元素组成和电化学性能。通过电催化还原反应实验研究了反应器构型、电流密度、pH、反应时间和电极重复使用次数对Ni@NC电催化还原性能的影响。在采用阳离子交换膜的情况下,以电流密度10 mA/cm2反应120 min,pH为3的模拟废水中亚磷酸盐的还原率达到60%左右。A metal–organic frameworks(MOFs)derived nickel single-atom material(marked as Ni@NC)with electrocatalytic reduction activity was prepared through hydrothermal synthesis followed by high-temperature calcination.A graphite felt loaded with the Ni@NC catalyst was applied as anode to treat the wastewater discharged from electroless nickel plating process through electrocatalytic reduction from phosphite to hypophosphite for recycle of phosphorus in electroless nickel plating process.The micromorphology,crystal structure,elemental composition,and electrochemical property of Ni@NC were analyzed.The effects of reactor configuration,current density,pH,reaction time,and reuse of the Ni@NC-loaded electrode on the electrocatalytic reduction activity of Ni@NC were studied experimentally.The reduction rate of phosphite in an artificial wastewater was about 60%when the reaction was conducted with a cationic exchange membrane at pH 3 and current density 10 mA/cm2 for 120 min.

关 键 词：化学镀镍 废水处理 亚磷酸盐 金属有机骨架化合物 镍单原子材料 电催化还原 

分 类 号：TQ153[化学工程—电化学工业] X703[环境科学与工程—环境工程]