氮掺杂碳材料的制备及催化降解苯酚废水实验研究  

Preparation of nitrogen-doped carbon materials and application in catalytic degradation of phenol-containing wastewater

作　　者：潘建 潘顺龙 刘志英[1] 刘珍雪 徐炎华[1] PAN Jian;PAN Shun-long;LIU Zhi-ying;LIU Zhen-xue;XU Yan-hua(School of Environmental Science and Engineering,Nanjing Tech University,Nanjing 210009,China)

机构地区：[1]南京工业大学环境科学与工程学院,江苏南京210009

出　　处：《现代化工》2020年第11期131-135,共5页Modern Chemical Industry

基　　金：国家十三五重点研发课题(2017YFB0602500);江苏省高校自然科学研究计划(16KJA610002)。

摘　　要：以ZIF-67为前驱体并经过热解法制备ZIF-67衍生碳材料的催化剂,利用BET、XRD、SEM等分析方法对催化剂进行表征。结果表明,在700、800、900℃条件下制备的催化剂都形成了金属单质Co,形成包覆钴金属的氮掺杂多孔碳的结构,通过对比实验发现,800℃下制得的催化剂催化活性比在700、900℃下的高。同时设计了催化降解模拟苯酚废水的实验,结果表明,当苯酚初始质量浓度为50 mg/L、过一硫氢盐浓度为1.2 mmol/L、催化剂质量浓度为0.05 g/L、p H=9、反应时间为120 min时,苯酚和TOC的去除率分别为90.6%和82.3%;催化剂重复实验5次后,苯酚和TOC的去除率分别为76.4%和70.3%。ZIF-67 derived carbon material catalyst is prepared by pyrolysis method using ZIF-67 as the precursor.The catalyst is characterized by BET,XRD,SEM and other analytical methods.The results show that the catalysts prepared at 700℃,800℃and 900℃all form elemental Co,and forming a structure of nitrogen-doped porous carbon coated with cobalt metal.Through comparative experiments,it is found that the catalyst prepared at 800℃has higher catalytic activity than that prepared at 700℃and 900℃.An experiment is designed for catalytic degradation of simulated phenol wastewater,and the results show that the removal rates of phenol and TOC are 90.6%and 82.3%,respectively when the initial mass concentration of phenol is 50 mg·L-1,the concentration of persulfate is 1.2 mmol·L-1,the mass concentration of catalyst is 0.05 g·L-1,p H=9 and the reaction lasts for 120 min.After the catalyst has been used for 5 times,the removal rates of phenol and TOC are 76.4%and 70.3%,respectively.

关 键 词：类沸石咪唑酯骨架系列材料 催化降解 PMS氧化 苯酚 

分 类 号：X703[环境科学与工程—环境工程]