Abstract
Layered double hydroxides (LDHs), one of the most important two-dimensional layered compounds, have enabled massive developments in effective pollution treatments. Their derivative materials have also attracted multidisciplinary attention owing to the intrinsic advantages of their moderate chemiostability, low cost and nontoxicity. Over the past few decades, significant advances have been made in the synthesis of novel LDH-based composites and the optimization of characterization techniques. In this review, we give an overview of the recent advances in LDH-based nanomaterials, from a brief introduction to their preparation and modification methods to an overview of their application in the removal of radionuclides and an exploration of their underlying adsorption mechanisms. In the end, a summary and outlook are also briefly addressed. This review intends to provide deep insight into the design of high-performance LDH-based materials for the potential elimination of radionuclides from aqueous solutions during environmental pollution cleanup.
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•Preparation and surface modification of LDHs and LDH-based materials were outlined.•Removal of radionuclides by LDH-based materials were summarized.•Adsorption capacities of radionuclides on LDH-based materials with other materials were compared.•Interaction mechanism were discussed by XAFA, SCMs and theoretical calculations.
The preparation of LDH-based nanomaterials and their application in the removal of radionuclides were overviewed. The interaction mechanism was discussed from the batch experiments, spectroscopy analysis and theoretical calculations were briefly discussed, and the potential application in the elimination of pollutants was addressed.