工业水处理 ›› 2023, Vol. 43 ›› Issue (8): 89-96. doi: 10.19965/j.cnki.iwt.2022-0855

• 试验研究 • 上一篇    下一篇

碳化ZIF-67催化过硫酸盐降解水中的甲基橙

陈晴空1,2(), 雷翼妃1,2, 陈治君1,2, 王欢1,2, 范剑平3, 李姗泽4, 王殿常5   

  1. 1. 重庆交通大学 环境水利工程重庆市工程实验室, 重庆 400074
    2. 重庆交通大学 水利水运工程教育部重点实验室, 重庆 400074
    3. 重庆文理学院 环境材料与修复技术重庆市重点实验室, 重庆 402160
    4. 中国水利水电科学研究院 流域水循环模拟与调控国家重点实验室, 北京 100038
    5. 长江生态环保集团有限公司, 湖北 武汉 430062
  • 收稿日期:2023-06-05 出版日期:2023-08-20 发布日期:2023-08-28
  • 作者简介:

    陈晴空(1983— ),博士,副教授。电话:13752819296,E-mail:

  • 基金资助:
    国家自然科学基金项目(42007352); 中国长江三峡集团有限公司项目(202003173); 重庆交通大学研究生科研创新项目(2021S0026); 重庆交通大学国家内河航道整治工程技术研究中心暨水利水运工程教育部重点实验室开放基金项目(SLK2021B14)

Degradation of methyl orange in water by persulfate catalyzed with carbonized ZIF-67

Qingkong CHEN1,2(), Yifei LEI1,2, Zhijun CHEN1,2, Huan WANG1,2, Jianping FAN3, Shanze LI4, Dianchang WANG5   

  1. 1. Chongqing Engineering Laboratory of Environmental & Hydraulic Engineering,Chongqing Jiaotong University,Chongqing 400074,China
    2. Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education,Chongqing Jiaotong University,Chongqing 400074,China
    3. Chongqing Key Laboratory of Environmental Materials and Remediation Technology,Chongqing University of Arts and Sciences,Chongqing 402160,China
    4. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China
    5. Changjiang Eco-environmental Protection Group Co. ,Ltd. ,Wuhan 430062,China
  • Received:2023-06-05 Online:2023-08-20 Published:2023-08-28

摘要:

通过溶剂热法制备了ZIF-67,并碳化生成ZIF-67(C)。利用红外光谱、BET比表面积测试、Zeta电位、X射线衍射和X射线光电子能谱等对ZIF-67(C)进行表征。以甲基橙(MO)降解实验验证了ZIF-67(C)对过一硫酸氢钾(PMS)的催化作用,鉴定了反应中的主要活性物种是硫酸根自由基(SO4 ·-),讨论了金属与有机配体物质的量之比、溶剂种类和煅烧温度(T)以及MO初始浓度、反应初始pH、ZIF-67(C))投加量和PMS投加量对ZIF-67(C)活化PMS降解MO的影响。结果表明:与ZIF-67比,ZIF-67(C)不仅有较好的吸附性能,且对PMS的催化能力更强。当制备条件为n(Co2+)∶n(2-MIM)=1∶8、甲醇为溶剂、T=500 ℃时,ZIF-67(C)表现出最优的PMS催化性能;当MO初始质量浓度为10 mg/L,ZIF-67(C)投加质量浓度为0.2 g/L,PMS投加质量浓度为0.2 g/L时,1 h内MO的去除率达93.7%。同时,ZIF-67(C)在水中的分散性和稳定性强,重复使用4次后MO去除率仍有78%。此外,ZIF-67(C)里存在高度结晶的Co3O4,使其表现出磁性,可通过磁力回收。

关键词: 金属-有机骨架材料, 碳化, 过一硫酸盐, 甲基橙

Abstract:

ZIF-67 was prepared by solvothermal method and carbonized to form ZIF-67(C),which was characterized by IR,BET,Zeta potential,X-ray diffraction and X-ray photoelectron spectroscopy. The catalytic effect of ZIF-67(C) on potassium bisulfate(PMS) was verified by methyl orange(MO) degradation experiment. The main active species in the reaction was identified as sulfate radical(SO4 ·-),and the effects of molar ratio of metal to organic ligand,the type of solvent and calcination temperature(T),the initial concentration of MO,the initial pH of the reaction,the dosage of ZIF-67(C) and the dosage of PMS on the degradation of MO by PMS activated by ZIF-67(C) were discussed. The results showed that,compared with ZIF-67,ZIF-67(C) not only had better adsorption performance,but also had stronger catalytic capacity for PMS. When the preparation conditions were n(Co2+)∶n(2-MIM)=1∶8,methanol as solvent,T=500 ℃,ZIF-67(C) showed the best PMS catalytic performance. When the initial concentration of MO was 10 mg/L,the dosage of ZIF-67(C) was 0.2 g/L and the dosage of PMS was 0.2 g/L,the removal rate of MO reached 93.7% within 1 h. At the same time,ZIF-67(C) had strong dispersion and stability in water,and the MO removal rate was still 78% after it was repeated use for 4 times. In addition,there was highly crystalline Co3O4 in ZIF-67(C),which made it magnetic and could be recovered by magnetic force.

Key words: metal-organic frameworks, carbonization, persulfate, methyl orange

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