Ádám Rebeka M, Papp Paszkál, Horváth Dezső, Tóth Ágota
Department of Physical Chemistry and Materials Science, University of Szeged Rerrich Béla tér 1. Szeged 6720 Hungary
Department of Applied and Environmental Chemistry, University of Szeged Rerrich Béla tér 1. Szeged 6720 Hungary.
RSC Adv. 2024 Dec 17;14(53):39618-39624. doi: 10.1039/d4ra07137a. eCollection 2024 Dec 10.
We propose a novel approach to characterize the growth of individual crystals. Calcium chloride and sodium carbonate solutions have been injected into a Y-shaped microfluidic channel at various stoichiometric ratios, and the development of calcium carbonate has been monitored. The formation of calcite and vaterite depends not only on the stoichiometric ratio of the reactants but also on the region of the reactor where they form. From the crystal images, we have mapped the surface growth of the particles and have shown that closer to the confluence of the microchannel the crystal growth is significant. Both morphologies mainly form in the carbonate-rich zone, supported by numerical modeling. Moreover, the side growth of the calcite particles is diffusion-controlled and independent of the crystal orientation and the stoichiometric ratio of the reactants injected.
我们提出了一种表征单个晶体生长的新方法。已将氯化钙和碳酸钠溶液以各种化学计量比注入Y形微流控通道中，并监测了碳酸钙的形成过程。方解石和球霰石的形成不仅取决于反应物的化学计量比，还取决于它们在反应器中形成的区域。通过晶体图像，我们绘制了颗粒的表面生长情况，并表明在微通道汇合处附近晶体生长显著。两种形态主要在富碳酸盐区域形成，这得到了数值模拟的支持。此外，方解石颗粒的侧向生长受扩散控制，与晶体取向和注入反应物的化学计量比无关。
