Facile synthesis of rose-like composites of zeolites and layered double hydroxides: Growth mechanism and enhanced properties

Xiu-Zhen Xie; Liang Xu; Yuanming Pan; Jin-Xiao Mi

doi:10.1016/j.chemosphere.2022.136741

Facile synthesis of rose-like composites of zeolites and layered double hydroxides: Growth mechanism and enhanced properties

Chemosphere. 2022 Dec;309(Pt 2):136741. doi: 10.1016/j.chemosphere.2022.136741. Epub 2022 Oct 6.

Authors

Xiu-Zhen Xie¹, Liang Xu¹, Yuanming Pan², Jin-Xiao Mi³

Affiliations

¹ Department of Materials Science and Engineering, College of Materials, Xiamen University, No. 422 Siming South Road, Xiamen, 361005, Fujian Province, China.
² Department of Geological Sciences, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada.
³ Department of Materials Science and Engineering, College of Materials, Xiamen University, No. 422 Siming South Road, Xiamen, 361005, Fujian Province, China. Electronic address: jxmi@xmu.edu.cn.

PMID: 36209865
DOI: 10.1016/j.chemosphere.2022.136741

Abstract

Excellent performances of various materials often depend on high specific surface areas. Therefore, increase of specific surface areas is one of the most important means to improve the properties and performances of materials. Herein, we report a facile strategy to prepare novel composite materials of zeolites and hydrotalcite-like layered double hydroxides, with high specific surface areas. The composites with a rose-like morphology were synthesized hydrothermally by adding synthetic zeolites to the raw materials used for the formation of hydrotalcite. The resultant composites were shown to contain two distinct layered double hydroxides with different Mg/Al molar ratios. Nitrogen (N₂) adsorption-desorption measurements showed that the specific surface areas and the pore volumes of these composites increased by an order of magnitude in comparison with hydrotalcite. The new composites were shown to be capable of effectively removing Cr(VI), Cu(II) and methylene blue from aqueous environments and had better performances for the latter two contaminants than hydrotalcite. Moreover, this strategy potentially opens up the synthesis of new composite materials with tunable compositions and enhanced properties for environmental and other applications.

Keywords: Composite materials; Contaminant remediation; High specific surface area; Layered double hydroxides (LDHs); Rose-like morphology.