摘要
以不同Fe-Cu摩尔比的金属有机骨架化合物(MOFs)为前驱体,经高温碳化制得相应衍生碳催化剂(Fe-Cu@C),将其用于催化H2O2处理罗丹明B废水,并对催化剂形貌、表面性质及孔结构进行表征。实验结果表明:Fe-Cu@C中Cu相对含量的增大有利于促进催化剂上CuO、Fe0和Fe^(2+)的形成,因而双金属催化剂Fe-Cu@C比单金属催化剂6Fe@C体现出更高的罗丹明B去除效果;在反应温度为323 K、pH=4、H2O2(w=30%)加入量0.5 mL、2Fe4Cu@C加入量0.25 g/L、反应时间60 min、罗丹明B质量浓度100 mg/L的条件下,罗丹明B去除率可达100%。整个过程是一个表面自由基参与的准一级动力学过程。重复使用4次的2Fe4Cu@C高温再生后,催化活性可恢复至原来的96.6%。
Using metal organic framework compounds(MOFs)with different Fe-Cu molar ratios as precursors,the corresponding derived carbon catalysts(Fe-Cu@C)were prepared by high-temperature carbonization,which were used to catalyze the H2O2 treatment of rhodamine B wastewater.The morphology,surface properties and pore structure of the catalyst were characterized.The experimental results show that:The increase of the relative content of Cu in Fe-Cu@C is beneficial to promote the formation of Cu0,Fe0 and Fe^(2+)on the catalyst,therefore,the bimetallic catalyst Fe-Cu@C exhibits higher Rhodamine B removal effect than the single-metal catalyst 6Fe@C;Under the conditions of reaction temperature 323 K,pH=4,H2O2(w=30%)addition amount 0.5 mL,2Fe4Cu@C addition amount 0.25 g/L,reaction time 60 min and Rhodamine B mass concentration 100 mg/L,the removal rate of Rhodamine B can reach 100%.The whole process is a quasi-first order kinetic process involving surface free radicals.After reused for 4 times and regenerated at high temperature,the catalytic activity of 2Fe4Cu@C can be restored to the original 96.6%.
作者
莫莎
岳丽蓉
邢波
杨郭
宋燕
宋燕汝
MO Sha;YUE Lirong;XING Bo;YANG Guo;SONG Yan;SONG Yanru(School of Chemical Engineering,Sichuan University of Science and Engineering,Zigong 643000,China)
出处
《化工环保》
CAS
CSCD
北大核心
2021年第3期303-312,共10页
Environmental Protection of Chemical Industry
基金
四川轻化工大学生创新业训练计划项目(S201910622-032)
四川省科技厅重点研发项目(2020YFS0341)
钒钛资源综合利用四川省重点实验室项目(2018FTSZ12、2018FTSZ18)。
