吸附
层状双氢氧化物
化学工程
X射线光电子能谱
氢键
复合数
材料科学
聚合
傅里叶变换红外光谱
化学
无机化学
有机化学
复合材料
分子
聚合物
氢氧化物
工程类
作者
Haihua Xu,Sidi Zhu,Keren Lu,Huijuan Jia,Mingzhu Xia,Fengyun Wang
标识
DOI:10.1016/j.cej.2022.138127
摘要
In this work, ZIF-8 derived [email protected]@Ni/Al layered double hydroxides (denoted as [email protected]@NiAl-LDH) composite has been successfully designed via the facial synthesis of the ZIF-8, followed by high-temperature pyrolysis, oxidative polymerization of polyaniline, and in-site growth of NiAl-layered double hydroxides. Meanwhile, the composite acts as an advanced adsorption material for the scavenging of saccharin from aqueous solutions. Moreover, benefiting from the unique three-dimensional (3D) hierarchically floral structure and various functional groups, the as-prepared [email protected]@NiAl-LDH composite presents a high adsorption capacity (498.5 mg/g) for saccharin, superior to other reported adsorbents. Besides, the [email protected]@NiAl-LDH possesses rapid adsorption kinetics and excellent reusability performance. Furthermore, Fourier transformed infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) analyses initially reveal the possible adsorption mechanism, including electrostatic interactions, π-π interactions, and hydrogen bonding. Quantum chemical theory calculations further indicate the above adsorption mechanism. Significantly, based on the Hirshfeld surface analyses, saccharin behaves as the H-bond acceptor, while the NiAl-LDH works as the H-bond donor. This work provides a feasible strategy to design advanced materials for practical wastewater treatment.
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