Issue 10, 2024

A karst-inspired hierarchical Mg/Al layered double hydroxide with a high entropy-driven process for interception and storage

Abstract

Karstification plays a crucial role in forming magnificent scenery, and storing oil, natural gas, mineral resources, and water. Through the inspiration of karstification, a hierarchical layered double hydroxide (LDH) with funnel-like and cave-like structures (called Karst-LDH) is formed by the dissolution of acrylic acid/water solution. Meanwhile, the results of transmission electron microscopy (TEM) and scanning electron microscopy (SEM) show that Karst-LDH has complicated and interconnected internal pipe networks. The actual maximum phosphate adsorption capacity of Karst-LDH reaches 126.38 mg gāˆ’1 due to the unique structures, protonation, ligand exchange, ion exchange, and hydrogen bonding, which is over ten times that of general LDH with a regular hexagonal structure. The results of isotherms and thermodynamics also indicate that Karst-LDH conforms to more heterogeneous and multilayer adsorption with a higher entropy-driven process. Karst-LDH exhibits good selectivity for chloride and nitrate ions. The change in the frontier orbital interaction between phosphate and different LDHs is a significant reason for quick macropore transmission, mesopore interception, and finally, phosphate storage in Karst-LDH. This work provides an efficient way for the design and fabrication of high adsorption performance materials with unique karst-type structures, which can be used for multiple fields potentially.

Graphical abstract: A karst-inspired hierarchical Mg/Al layered double hydroxide with a high entropy-driven process for interception and storage

Supplementary files

Article information

Article type
Paper
Submitted
29 Oct 2023
Accepted
23 Jan 2024
First published
25 Jan 2024

Dalton Trans., 2024,53, 4412-4425

A karst-inspired hierarchical Mg/Al layered double hydroxide with a high entropy-driven process for interception and storage

H. Shi, J. Qin, Q. Lv, L. Zhang, Q. Li, B. Ou and X. Chen, Dalton Trans., 2024, 53, 4412 DOI: 10.1039/D3DT03615D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements