The most common method for the synthesis of layered double hydroxides (LDHs) is co-precipitation. This review is focused on the summarizing of results concerning the influence of synthesis conditions on the formation of layered double hydroxides. Mainly, the review considers synthesis of ZnAl-LDHs, CuAl-LDHs due to a lack of information about the aforementioned materials and wide literature information about MgAl-LDHs, which is the most common to be used as a support for catalysts. CuAl-LDHs and ZnAl-LDHs can be applied as the catalysts in a variety of reactions such as methanol synthesis, methanol steam reforming, reductive amination, etc., or efficient photocatalysts for removing organic dye molecules. It is important to investigate the synthesis conditions under which CuAl-LDHs form, as they can affect catalytic performance in the aforementioned reactions. The effect of pH is considered in this review since LDH for different metal salts can be formed at different pH. The concentration of base solution during precipitation and the nature of base solution can also affect the hydrotalcite formation. Data concerning the metal precursors used and their concentrations are also included in this review.

合成层状双氢氧化物（LDH）的最常用方法是共沉淀。这篇综述集中在关于合成条件对层状双氢氧化物形成的影响的结果的总结上。由于缺乏有关上述材料的信息以及有关MgAl-LDHs的广泛文献信息，该综述主要考虑了ZnAl-LDHs，CuAl-LDHs的合成，而MgAl-LDHs是最常用作催化剂载体的信息。可以将CuAl-LDH和ZnAl-LDH用作各种反应中的催化剂，例如甲醇合成，甲醇蒸汽重整，还原胺化等，或用于除去有机染料分子的有效光催化剂。研究形成CuAl-LDHs的合成条件非常重要，因为它们会影响上述反应的催化性能。由于可以在不同的pH值下形成不同金属盐的LDH，因此在本综述中考虑了pH值的影响。沉淀过程中碱溶液的浓度和碱溶液的性质也会影响水滑石的形成。有关所用金属前体及其浓度的数据也包括在本评价中。