吸附
吸附
弗伦德利希方程
傅里叶变换红外光谱
朗缪尔
螯合作用
X射线光电子能谱
材料科学
选择性
核化学
三唑
朗缪尔吸附模型
化学工程
无机化学
有机化学
化学
催化作用
工程类
作者
Ye Jia,Donghai Zhu,Qifan Yang,Xu Liu,Zahra Gholami,Mohammadtaghi Vakili,Shuangxi Zhou,Wei Wang
标识
DOI:10.1016/j.mtcomm.2023.107976
摘要
The presence of mercury (Hg(II)), a highly toxic pollutant in the aquatic environment, motivates researchers to use an effective method to remove it from water. Herein, we synthesized COF-TAZ and COF-TOE via post-modification with 3-mercapto-1,2,4-triazole and 4-(methylsulfanyl)thiophenol to form triazole group and methylthio group, respectively, and followed by characterization with SEM, FTIR, and XRD, etc. The adsorption behaviors of Hg(II) on two modified COFs were evaluated by adsorption kinetic models using the pseudo-first order, pseudo-second order and intra-particle diffusion models, as well as isotherm models, i.e., Langmuir and Freundlich models. COF-TAZ and COF-TOE manifested maximum experimental uptake capacity of 108.09 mg g−1 and 104.85 mg g−1, respectively. Notably, COF-TAZ exhibited commendable binding selectivity towards Hg(II) and displayed a good recycling ability, with a removal percentage still above 90% after five cycles. Especially, the adsorption mechanisms of COF-TAZ and COF-TOE were clarified by FTIR, XPS and DFT calculations, suggesting that electrostatic interaction and chelation were involved in the adsorption process. This study shows that functionalized COFs have good application prospects in effective removal of heavy metals in water.
科研通智能强力驱动
Strongly Powered by AbleSci AI