镍基催化剂的改性及其提高NaClO氧化性能

Improving the Oxidation of NaClO by modified Ni-Based Catalysts Prepared through Immerse Precipitation Method

通过加入助剂的方法对采用浸没沉淀法制备的镍基催化剂进行改性,利用X射线衍射(XRD)、BET、环境扫描电镜(SEM)和热重-差热等分析方法对改性的镍基催化剂进行表征,并对改性的镍基催化剂进行催化NaClO产生有效氯的活性评价。结果表明,Fe_2O_3-镍基催化剂适宜的焙烧温度为450℃;Fe_2O_3-KMnO_4-镍基催化剂的比表面积比Fe_2O_3-镍基催化剂的比表面积高125 m^2/g;当反应时间为90 min,Fe_2O_3 : Ni_2O_3 : KMnO_4(质量比)为1 : 7:1时,催化NaClO产生有效氯比Fe_2O_3:Ni_2O_3质量比为1 : 7时高10%,比不添加Fe_2O_3的镍基催化剂高22%;处理含有甲醇、间氨基苯磺酸和间二乙胺基苯磺酸钠等有机物的废水,Fe_2O_3-KMnO_4-镍基催化剂的催化活性最佳,其间氨基苯磺酸的去除率比Fe_2O_3-镍基催化剂高8.36%,比未改性的镍基催化剂高15.98%。

Ni-based catalysts prepared through immersion precipitation method were modified with adding additives. The catalysts were characterized through X-ray diffraction （XRD）, BET,Ni-based catalysts were investigated. The results showed that suitable calcination temperature for the modified Ni-based catalysts was 450 ℃. The specific area of Fe2O3-KMnO4-Ni-based catalysts is 125 m^2/g higher than that of Fe2O3-Ni-based catalysts. When the reaction time was 90 min, the effective chlorinethe of NaClO for Fe2O3-KMnO4-Ni-based catalyst was 10% higher than that for Fe2O3-Ni-based eatalyst and 22 % higher than that for Ni-based catalysts without Fe2O3. For organic wastewater containing methanol, metanilic acid and m-nitrobenzenesulfonic acid, Fe2O3-KMnO4- Ni-based catalysts showed the highest activity, the removal ratio of metanilic acid was 8. 36% higher than that for the Fe2O3-Ni-based catalysts and 15.98% higher than that for Ni-based catalysts without Fe2 O3.