Singha Roy Abhinandan, Kesavan Pillai Sreejarani, Ray Suprakas Sinha
Centre for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology Innovation Centre, Council for Scientific and Industrial Research, Pretoria 0001, South Africa.
Department of Chemical Sciences, University of Johannesburg, Doorfontein 2028, Johannesburg, South Africa.
ACS Omega. 2022 Jun 6;7(24):20428-20440. doi: 10.1021/acsomega.2c01405. eCollection 2022 Jun 21.
Agricultural practices in modern society have a detrimental impact on the health of the ecosystem, environment, and consumers. The significantly high usage rate of chemicals causes serious harm, and the sector demands the development of innovative materials that can foster improved food production and lessen ecological impacts. The majority of layered double hydroxides (LDH) are synthetic. At the same time, some of them occur in the form of natural minerals (hydrotalcite), which have recently emerged as favorable materials and provided advanced and ingenious frontiers in various fields of agriculture through practical application possibilities that can replace conventional agricultural systems. LDH can exchange anions intercalated between the layers in the interlayer structure, and there is evidence that atmospheric carbon dioxide and moisture can completely break down LDH over time. Due to certain unique properties such as tunable structure, specific intercalation chemistry, pH-dependent stability, as well as retention of the guest molecules within interlayers and their subsequent controlled release, LDHs are increasingly investigated as materials to enhance yield, quality of crops, and soil in recent times. This review aims to present the current research progress in the design and development of LDH-based materials as nanoscale agrochemicals to illustrate its relevance in making agro-practices more sustainable and efficient. Specific emphasis is given to the functionality of these materials as effective materials for the slow release of fertilizers and plant growth factors as well as adsorption of toxic agrochemical residues and contaminants. Relevant research efforts have been briefly reviewed, and the potential of LDH as new generation green materials to provide solutions to agricultural problems for improving food productivity and security has been summarized.
现代社会的农业实践对生态系统、环境和消费者健康产生了不利影响。化学品的高使用率造成了严重危害，该领域需要开发能够促进粮食产量提高并减少生态影响的创新材料。大多数层状双氢氧化物（LDH）是合成的。与此同时，其中一些以天然矿物（水滑石）的形式存在，这些天然矿物最近已成为有利材料，并通过可替代传统农业系统的实际应用可能性，在农业的各个领域提供了先进而巧妙的前沿技术。LDH可以交换层间结构中层间插入的阴离子，并且有证据表明大气中的二氧化碳和水分会随着时间的推移使LDH完全分解。由于LDH具有某些独特的性质，如可调节的结构、特定的插层化学、pH依赖的稳定性，以及客体分子在层间的保留及其随后的控释，近年来，LDH作为提高作物产量、品质和土壤质量的材料受到越来越多的研究。本综述旨在介绍基于LDH的材料作为纳米级农用化学品在设计和开发方面的当前研究进展，以说明其在使农业实践更具可持续性和高效性方面的相关性。特别强调了这些材料作为肥料和植物生长因子缓释以及有毒农用化学品残留和污染物吸附的有效材料的功能。简要回顾了相关研究工作，并总结了LDH作为新一代绿色材料为解决农业问题以提高粮食生产力和安全性提供解决方案的潜力。
