Structure-Dependent Dissolution and Restructuring of Calcite Surfaces by Organophosphonates
Structure-Dependent Dissolution and Restructuring of Calcite Surfaces by Organophosphonates
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DOI：
10.1021/acs.cgd.7b00959
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发表时间：
2017-10
影响因子：
3.8
通讯作者：
M. Nalbach;Argyri Moschona;K. Demadis;S. Klassen;R. Bechstein;A. Kühnle
中科院分区：
文献类型：
--
作者：
M. Nalbach;Argyri Moschona;K. Demadis;S. Klassen;R. Bechstein;A. Kühnle
众所周知，有机膦酸酯与各种矿物如水镁石、石膏和重晶石的表面强烈相互作用。在这项工作中，我们研究了六个系统不同的有机膦酸酯分子（四膦酸酯和二膦酸酯）对方解石（10.4）表面溶解过程的影响。为了进行系统的研究，我们选择了具有相似结构特征，但也具有系统结构差异的有机膦酸酯。这类添加剂的方解石（10.4）表面的溶解过程中的效果进行了评估，使用原位动态原子力显微镜。对于所有的六个有机膦酸酯衍生物，我们观察到一个显着的重组的（10.4）解理面的方解石，表现出的特征形状的蚀坑的形成。为了阐明它们对方解石溶解过程的具体影响（10.4），我们系统地改变了功能性端基的数量（四膦酸酯和四膦酸酯各两个）。
Organophosphonates are well-known to strongly interact with the surfaces of various minerals, such as brucite, gypsum, and barite. In this work, we study the influence of six systematically varied organophosphonate molecules (tetraphosphonates and diphosphonates) on the dissolution process of the (10.4) surface of calcite. In order to pursue a systematic study, we have selected organophosphonates that exhibit similar structural features, but also systematic architectural differences. The effect of this class of additives on the dissolution process of the calcite (10.4) surface is evaluated using in situ dynamic atomic force microscopy. For all of the six organophosphonate derivatives, we observe a pronounced restructuring of the (10.4) cleavage plane of calcite, demonstrated by the formation of characteristically shaped etch pits. To elucidate their specific influence on the dissolution process of calcite (10.4), we vary systematically the number of functional end groups (two for the tetraphosphonates and...