Atom-level local structures of a ternary composite of cellulose and metal (hydro)oxides and its applications on lead ion capture

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2024-11-12 DOI:10.1016/j.colsurfa.2024.135749

Xin-Yu You , Yu-Jie Zhang , Long-Xiao Gu , Zi-Xiong Zhou , Nian-Dan Zhao , Yuan-Ru Guo , Shujun Li , Qing-Jiang Pan

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Abstract

Discharging of lead-contained sewage has posed great threats to the ecological environment and human being health. To effectively eliminate Pb²⁺, a ternary composite cellulose/zinc oxide/magnesium hydroxide (labelled as CelZnMg) was prepared by a simple hydrothermal method. The XRD, SEM, TEM and XPS were applied to analyze CelZnMg. It shows that ZnO particles and Mg(OH)₂ sheet uniformly distribute on the surface of cellulose. Comprehensive density functional theory calculations realize that the composite has four structural arrangements at the atomic level. Its three components are chemically coupled, which in return stabilize the whole composite. Computationally and experimentally, CelZnMg can separate Pb²⁺ ions from water and immobilize them on the composite surface, where the removal efficiency reaches 99.7 %. The removal mechanism has been proposed.

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纤维素和金属（氢）氧化物三元复合材料的原子级局部结构及其在铅离子捕获中的应用

含铅污水的排放对生态环境和人类健康造成了巨大威胁。为有效消除 Pb2+，采用简单的水热法制备了纤维素/氧化锌/氢氧化镁三元复合材料（CelZnMg）。应用 XRD、SEM、TEM 和 XPS 对 CelZnMg 进行了分析。结果表明，氧化锌颗粒和 Mg(OH)2 片均匀地分布在纤维素表面。综合密度泛函理论计算表明，该复合材料在原子水平上有四种结构排列。它的三种成分通过化学耦合，从而稳定了整个复合材料。通过计算和实验，CelZnMg 能将 Pb2+ 离子从水中分离出来并固定在复合材料表面，其去除效率达到 99.7%。研究还提出了去除机制。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.