吸附
咪唑酯
沸石咪唑盐骨架
刚果红
化学工程
氢键
结晶紫
Zeta电位
甲基蓝
堆积
介孔材料
化学
亚甲蓝
材料科学
分子
无机化学
金属有机骨架
有机化学
光催化
催化作用
纳米颗粒
病理
工程类
医学
作者
Xiaoling Wu,Jun Xiong,Shuli Liu,Jianhua Cheng,Min‐Hua Zong,Wen‐Yong Lou
标识
DOI:10.1016/j.jhazmat.2021.126011
摘要
Treatment of textile water containing organic molecules as contaminants still remains a challenge and has become a central issue for environment remediation. Here, a nucleotide incorporated zeolitic imidazolate frameworks (NZIF) featuring hierarchically porous structure served as a potential adsorbent for removal of organic dye molecules. Adsorption isotherms of organic dyes were accurately described by Langmuir adsorption model with correlation coefficients of 0.98 and kinetic data followed the pseudo-second-order model. The maximum adsorption capacity of NZIF for Congo red (CR) and methylene blue (MB) reached 769 and 10 mg/g, respectively, which were 6 and 5 times higher than that of ZIF-8. The adsorption behavior of sunset yellow and crystal violet was examined for mechanism investigation. Analysis of pore size, molecular size, zeta potential and FTIR measurement together revealed that mesopores in NZIF provided more interaction sites and led to enhanced adsorption capacity. Hydrogen bonding and π-π stacking which resulted from the interaction between introduced nucleotide monophosphate and dyes dominated the driving forces for adsorption, where electrostatic interaction was also involved. Moreover, the introduced nucleoside monophosphate enabled NZIF to function under acidic condition whereas ZIF-8 collapsed. This study opens a new avenue for design of porous materials for environment remediation.
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