One-Step Synthesis of Layered Double Hydroxides by a Solvent-Free Method
One-Step Synthesis of Layered Double Hydroxides by a Solvent-Free Method
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DOI：
10.1021/acssuschemeng.2c04436
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发表时间：
2022-09
期刊：
影响因子：
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通讯作者：
Li Jin;Y. Sun;Xiao-qing Zhou;J. Wen;Fang Wang;Xiang Ning;Yujie Wen;Di Wu;Luming Peng
中科院分区：
文献类型：
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作者：
Li Jin;Y. Sun;Xiao-qing Zhou;J. Wen;Fang Wang;Xiang Ning;Yujie Wen;Di Wu;Luming Peng
层状双氢氧化物（LDHs）是一类用途广泛的层状材料，通常在碱性溶液中制备，采用共沉淀法、水热法、溶胶-凝胶法和重构法，需要大量的水。已经尝试了一些机械化学合成方法来减少水的使用，从而减少废液的使用，但这些方法涉及复杂的步骤。本文报道了一种简单的一步法和无溶剂法合成不同阳离子的LDHs。与传统制备方法相比，该绿色制备方法节约了水和原材料，减少了污染物，简化了合成程序，提高了合成效率。所得的LDHs具有超薄结构，含有丰富的交换位点，吸附性能得到改善。因此，该研究结果为未来工业规模合成LDHs提供了一种绿色、可靠的方法。
Layered double hydroxides (LDHs), a class of layered materials with versatile applications, are commonly prepared in an alkaline solution, by using coprecipitation, hydrothermal, sol–gel and reconstruction method, where a large amount of water is required. A few mechanochemical synthesis methods have been attempted to reduce the use of water and thus waste solutions, while these methods involve complicated steps. Herein we report a simple one-step and solvent-free method for synthesizing various LDHs with different cations. Compared to conventional approaches, this green preparation method saves water and raw materials, reduces the pollutants, simplifies synthetic procedures, and enhances the synthesis efficiency. The obtained LDHs feature an ultrathin structure and contain rich exchangeable sites with improved sorption properties. Therefore, the results provide a green and robust method for the industrial-scale synthesis of LDHs in the future.