Synthesis and Structure of Hollow Calcite Particles
Synthesis and Structure of Hollow Calcite Particles
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DOI：
10.1021/cg0602921
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发表时间：
2006-08
影响因子：
3.8
通讯作者：
Michio Suzuki;H. Nagasawa;T. Kogure
中科院分区：
文献类型：
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作者：
Michio Suzuki;H. Nagasawa;T. Kogure
在聚偏二氟乙烯（PVDF）膜上合成了直径为2 - 10 μm的方解石空心球形颗粒，该膜上涂有从珍珠牡蛎壳中在碳酸钙过饱和溶液中制备的粗有机基质。作为反应时间的函数的所产生的颗粒的检查表明，颗粒的表面形貌从光滑表面变为具有方解石晶体的精细{104}面的粗糙表面。采用聚焦离子束技术制备了颗粒的横截面和薄试样，分别观察了颗粒内部和确定了颗粒的晶相。透射电子显微镜（TEM）分析表明，与短的反应时间的颗粒组成的球文石和无定形碳酸钙（ACC）。不规则的颗粒是多晶方解石，具有中空结构（特别是在相对较小的颗粒中）或颗粒内部的空隙空间。大的方解石晶体形成了球体的外壳，并且最小化了。
Hollow spherical particles of calcite with a diameter of 2−10 μm were synthesized on a polyvinyliden difluoride (PVDF) membrane blotted with crude organic matrices prepared from the pearl oyster shell in a supersaturated solution of calcium carbonate. Examination of the produced particles as a function of the reaction time showed that the surface topography of the particles changed from a smooth surface to a ragged one with fine {104} facets of calcite crystals. Cross-sections and thin specimens of the particles were prepared by using the focused ion beam technique to observe the inside and determine the crystalline phases, respectively. Transmission electron microscopy (TEM) analysis showed that the particles with a short reaction time consist of vaterite and amorphous calcium carbonate (ACC). The ragged particles are polycrystalline calcite with a hollow structure (especially in relatively smaller particles) or a void space inside the particles. Large calcite crystals form a crust of the sphere, and min...