Kumari Sonika, Sharma Ajay, Kumar Satish, Thakur Abhinay, Thakur Ramesh, Bhatia Shashi Kant, Sharma Anil Kumar
Department of Chemistry, Career Point University, Tikker - Kharwarian, Hamirpur, Himachal Pradesh, 176041, India.
Department of Chemistry, Career Point University, Tikker - Kharwarian, Hamirpur, Himachal Pradesh, 176041, India.
Chemosphere. 2022 Nov;306:135464. doi: 10.1016/j.chemosphere.2022.135464. Epub 2022 Jun 24.
Hydrotalcite-like anionic clays (HTs) also known as Layered double hydroxides (LDHs) have been developed as multifunctional materials in numerous applications related to catalysis, adsorption, and ion-exchange processes. These materials constitute an important class of ionic lamellar solid clays of Brucite-like structure which comprise of consecutive layers of divalent and trivalent metal cations with charge balancing anions and water molecules in interlayer space. These materials have received increasing attention in research due to their interesting properties namely layered structure, ease of preparation, flexible tunability, ability to intercalate different types of anions, electronic properties, high thermal stability, high biocompatibility, and easy biodegradation. Moreover, HTs/LDHs have unique tailorable and tuneable characteristics such as both acidic and basic sites, anion exchange capability, surface area, basal spacing, memory effect, and also exhibit high exchange capacities, which makes them versatile materials for a wide range of applications and extended their horizons to diverse areas of science and technology. This study enlightens the various rational researches related to the synthetic methods and features focusing on synthesis and/or fabrication with other hybrids and their applications. The diverse applications (namely catalyst, adsorbent to toxic chemicals, agrochemicals management, non-toxic flame retardants, and recycling of plastics) of these multifunctional materials related to a clean and sustainable environment were also summarized.
类水滑石阴离子粘土（HTs），也被称为层状双氢氧化物（LDHs），已被开发为多功能材料，应用于催化、吸附和离子交换等众多过程。这些材料构成了一类重要的具有水镁石状结构的离子层状固体粘土，由二价和三价金属阳离子的连续层组成，层间空间中有电荷平衡阴离子和水分子。由于其有趣的性质，即层状结构、易于制备、灵活可调性、插入不同类型阴离子的能力、电子性质、高热稳定性、高生物相容性和易于生物降解，这些材料在研究中受到越来越多的关注。此外，HTs/LDHs具有独特的可定制和可调特性，如酸性和碱性位点、阴离子交换能力、表面积、层间距、记忆效应，还具有高交换容量，这使得它们成为适用于广泛应用的多功能材料，并将其应用范围扩展到不同的科学技术领域。本研究阐述了与合成方法和特性相关的各种合理研究，重点是与其他杂化物的合成和/或制造及其应用。还总结了这些多功能材料在清洁和可持续环境方面的各种应用（即催化剂、有毒化学品吸附剂、农用化学品管理、无毒阻燃剂和塑料回收）。
