膦酸盐
插层(化学)
螯合作用
水溶液中的金属离子
氢氧化物
单层
金属氢氧化物
吸附
化学吸附
双功能
层状双氢氧化物
化学工程
化学
金属
无机化学
催化作用
有机化学
生物化学
工程类
作者
Sidi Zhu,Muhammad Asim Khan,Tomohito Kameda,Haihua Xu,Fengyun Wang,Mingzhu Xia,Toshiaki Yoshioka
标识
DOI:10.1016/j.jhazmat.2021.128062
摘要
The phosphonate functionalized layered double hydroxide constructed through intercalation reaction, and efficiently applied to capture toxicant metal ions. The characterization results indicated that the functionalized composite with many functional groups has adsorption potential to heavy metals. The strong chelation of the phosphonate groups with heavy metal ions proved it an excellent adsorbent leading to a maximum adsorption capacity of 156.95 mg/g (Cr3+) and 198.34 mg/g (Cd2+) separately. The data of kinetics and isotherm revealed that the chelating adsorption was dominated by chemisorption and monolayer interaction. Notably, the spent adsorbent presented satisfactory reusability after six cycles. Furthermore, the Forcite simulation with the CLAYFF-CVFF force field implied that the critical mechanism for modifiers and the surface sites of the interlayer is electrostatic interaction. Our in-depth exploration in terms of the weak interactions not only demonstrated the strength and nature but also provided a novel way to intuitively capture the type of interactions that occurred around interesting regions. In the end, we made detailed investigations on the chelation mechanism, and the covalent nature played a leading role in the binding interaction. This work provides a valuable strategy for researchers to design novel materials in practice.
科研通智能强力驱动
Strongly Powered by AbleSci AI