纳米级零价铁掺杂碳化沸石咪唑酸骨架-8的合成及其对水中亚甲基蓝的去除作用

IF 0.7 4区工程技术 Q4 CHEMISTRY, APPLIED

Polish Journal of Chemical Technology Pub Date : 2023-02-18 DOI:10.2478/pjct-2023-0003

Shuai Chen, Lemeng Qiao, Xuejiao Feng, Yufu Huang, Guilan Gao, Jie Guan, Donghai Lin

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引用次数: 0

摘要

摘要以硝酸铁和ZIF-8为原料，在800°C下碳酸化制备了纳米级零价铁掺杂碳化沸石咪唑盐骨架-8（nZVI/CZIF-8），并将其用作去除水中亚甲基蓝（MB）的吸附剂。合成的nZVI/CZIF-8的比表面积分别为806.9m2/g、孔体积分别为0.86cm3/g和nZVI含量分别为1.35%。nZVI/CZIF-8和CZIF-8都具有相同的O-H、C-H和C=C官能团。随着CZIF-8尺寸的增加，MB的去除率增加。nZVI的掺杂使MB的去除率在80分钟内从ZIF-8的74.5%提高到nZVI/CZIF-8的96.2%。MB的去除率随着nZVI/CZIF-8的加入而增加。吸附剂对MB的吸附符合Freundlich吸附等温模型，去除率符合拟一阶模型。结果证明了合成高活性、稳定的nZVI/CZIF-8粒子的可行性。

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Synthesis of nanoscale zero-valent iron doped carbonized zeolitic imidazolate framework-8 for methylene blue removal in water

Abstract Nanoscale zero-valent iron-doped carbonized zeolitic imidazolate framework-8 (nZVI/CZIF-8) was prepared by carbonation of ferric nitrate and ZIF-8 at 800 °C and used as an adsorbent to remove methylene blue (MB) from water. The synthesized nZVI/CZIF-8 has a specific surface area of 806.9 m2/g, a pore volume of 0.86 cm3/g and an nZVI content of 1.35%, respectively. Both the nZVI/CZIF-8 and CZIF-8 have identical functional groups of O-H, C-H and C=C. With the increase of CZIF-8 size, MB removal rate increased. The doping of nZVI increased the MB removal percentage from 74.5% for ZIF-8 to 96.2% within 80 min for nZVI/CZIF-8. The MB removal percentage increased with the dosage of nZVI/CZIF-8. The MB adsorption with the adsorbents conforms to the Freundlich adsorption isothermal model and the removal rate fitted well to a pseudo-first-order model. The results demonstrate the feasibility of synthesizing high active and stable nZVI/CZIF-8 particles.

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来源期刊

Polish Journal of Chemical Technology CHEMISTRY, APPLIED-ENGINEERING, CHEMICAL

CiteScore

1.70

自引率

10.00%

发文量

审稿时长

4.5 months

期刊介绍： Polish Journal of Chemical Technology is a peer-reviewed, international journal devoted to fundamental and applied chemistry, as well as chemical engineering and biotechnology research. It has a very broad scope but favors interdisciplinary research that bring chemical technology together with other disciplines. All authors receive very fast and comprehensive peer-review. Additionally, every published article is promoted to researchers working in the same field.