Ni-Fe/泡沫镍催化还原体系脱氯工艺参数的优化及表征

以泡沫镍做载体,采用电沉积法制备出镍/铁/泡沫镍双金属催化还原剂,并对目标污染物氯乙酸进行了脱氯研究,分析了催化还原剂在制备过程中沉积液浓度、电流密度对催化活性的影响,采用扫描电子显微镜对双金属体系表征以观察所制备的催化还原剂的表面形貌,可以观察到采用电沉积制备的Ni/Fe-泡沫镍双金属还原剂在基体泡沫镍上分布均匀、密集、呈针状结构,在一定电流密度下,沉积60 min的情况下无团聚现象。研究表明,本研究所制备的镍-铁/泡沫镍双金属催化还原剂对氯乙酸具有良好的脱氯效果。

Optimization and Characterization of Dechlorination Processing Parameters Based on Ni-Fe/Foamed Nickel Catalytic Reduction System

Electro-deposition method was used to prepare Ni/Fe/foam-Ni bimetal catalytic reductant,with foam-Ni as the carrier.This paper also studied the dechlorination of the goal pollutant-chloroacetic acid,analyzed the influence of deposition concentration,current density in the preparation of catalytic reductant on the catalytic activity.Scanning electron microscope was used to characterize bimetal system in order to observe catalytic reductant surface morphology.It could be observed that the Ni/Fe-foam-Ni bimetal reductant,prepared by electro-deposition process,were well distributed 、intensive 、presented in needle structure in the matrix of foam-Ni.In a certain current density,there was no reunion phenomenon during 60 minutes deposition.Research showed that Ni-Fe/foam-Ni bimetal catalytic reductant prepared in this study had a good effect on the dechlorination of chloroacetic acid.