The single crystal form and uncontrollable topography of CaCO₃ in nature severely restrict its product grade and application. Meanwhile, lignin is still not utilized efficiently. In order to improve this, three types of lignin monomer model compounds as p‐coumaric acid (PCA), ferulic acid (FA), and sinapic acid (SA) are employed to induce the growth of CaCO₃ to investigate the relationship between lignin structure and CaCO₃ crystallization. The synthesized PCA and CaCO₃ composite crystals (PC‐ACCs), FA and CaCO₃ composite crystals (F‐ACCs), and SA and CaCO₃ composite crystals (S‐ACCs) are characterized by field emission scanning electron microscope (FESEM), X‐ray diffraction (XRD), and Fourier transmission infrared spectroscopy (FTIR) to ascertain their molecular structures and crystal information. The growth rule of the acid and CaCO₃ composite crystals (ACCs) induced by the three units is also explored. The results show that the vaterite and calcite of ACCs can be formed selectively. In the presence of PCA, FA, and SA, pH is the key factor on the phase selection of ACCs. The temperature and organic acid type also play important roles on the formation of CaCO₃. The ACCs present distinguishing surface topographies at different temperatures. The number of methoxyl in the PCA, FA, and SA decides the phase ratio of vaterite and calcite in the ACCs.

中文翻译：

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木质素单体模型化合物干预中CaCO3的形成和相选择

自然界中CaCO _3的单晶形式和不可控的形貌严重限制了其产品等级和应用。同时，木质素仍未得到有效利用。为了改善这一点，采用了三种类型的木质素单体模型化合物，如对香豆酸（PCA），阿魏酸（FA）和芥子酸（SA）来诱导CaCO ₃的生长，以研究木质素结构之间的关系。和CaCO ₃结晶。合成的PCA和CaCO ₃复合晶体（PC‐ACC），FA和CaCO ₃复合晶体（F‐ACC）以及SA和CaCO ₃通过场发射扫描电子显微镜（FESEM），X射线衍射（XRD）和傅立叶透射红外光谱（FTIR）表征复合晶体（S‐ACC）的分子结构和晶体信息。还探讨了由这三个单元引起的酸和CaCO ₃复合晶体（ACC）的生长规律。结果表明，可以选择性地形成ACC的球石和方解石。在存在PCA，FA和SA的情况下，pH是ACC相选择的关键因素。温度和有机酸类型在CaCO ₃的形成中也起重要作用。ACC在不同温度下呈现出明显的表面形貌。PCA，FA和SA中甲氧基的数量决定了ACC中球ate石和方解石的相比。