负载型纳米Fe与负载型纳米Fe-Ni降解甲基橙的对比研究

以阳离子交换树脂为载体,合成了负载型纳米Fe和负载型纳米Fe-Ni双金属材料,并采用扫描电子显微镜和能谱分析对该材料进行表征,考察了m(FeSO4):m(树脂)、负载纳米材料加入量、溶液pH等因素对甲基橙降解率的影响.结果表明,两种负载纳米材料对0.05 g·L-1甲基橙均有较好的降解效果,甲基橙的降解率随负载纳米材料加入量的增加而增加；纳米双金属材料中Ni含量的增加有利于甲基橙的降解.在pH =4酸性条件下降解效果最佳.在优化的降解反应条件下,对比研究了负载型纳米Fe和负载型纳米Fe-Ni对甲基橙的降解效果.结果表明,负载型纳米Fe-Ni对甲基橙的降解效果要优于负载型纳米Fe.制备的材料在多次使用后经活化,仍有良好的催化稳定性.

Comparative study on degradation of methyl orange by resin-supported nano-iron and nano-iron/nickel

In the paper, the resin-supported nano-iron and nano-iron/nickel were synthesized by liquid-phase chemical reduction method. The obtained nano particles were characterized by scanning electron microscope (SEM) and energy spectrum. Some factors affecting the degradation of methyl orange were studied. The experimental results indicated that 0.05 g·L^-1 of methyl orange could be efficiently degraded by two kinds of nano particles. The degradation rate of methyl orange increased along with the increase of the resin-supported nano particle amount. A better degradation effect of methyl orange was obtained when the nickel content of nano particle increased. The pH showed a significant effect on the degradation of methyl orange, with best degradation effect at pH=4. Under optimized conditions, the resin-supported nano-iron/nickel showed better degradation efficient than nano iron. The supported nano-iron/nickel still had good stability after activation in multiple times.