g-C_3N_4负载铁钴双金属催化过硫酸氢盐降解亚甲基蓝

Using g-C_3N_4 supported iron cobalt bimetal for activating peroxymonosulfate and degrading methylene blue

以液相还原法制备石墨相氮化碳(g-C_3N_4)负载纳米铁钴双金属催化剂用于催化过硫酸氢盐(PMS)降解亚甲基蓝废水,并对其进行了表征。结果显示:双金属颗粒分布在g-C_3N_4的褶皱中且进入晶格中。制得的催化剂和纯g-C_3N_4相比表现出了更高的降解率。常温下,pH=7,g-C_3N_4与铁的质量比为1∶1,钴的质量分数为10%,催化剂投加质量浓度为50 mg/L,PMS投加质量浓度为600 mg/L,反应30 min后,亚甲基蓝的降解率为88.4%。

The graphite phase nitrite carbon(g-C3N4)-loaded nano iron-cobalt bimetal catalyst has been prepared by liquid phase reduction method.The catalyst can be used for activating peroxymonosulfate(PMS),and degrading methylene blue(MB),and has been characterized.The results show that the bimetallic particles distribute in the folds of g-C3N4 and precipitate into the lattice.Compared with pure g-C3N4,the prepared catalyst has higher degrada-tion rate.Under the following optimal conditions:at room temperature,when pH is 7,mass ratio of g-C3N4 and Fe is 1∶1,mass fraction of Co is 10%,mass concentration of catalyst is 50 mg/L,mass concentration of PMS is 600 mg/L,and reaction time is 30 min,the degradation rate of methylene blue is 88.4%.