Abstract
From the perspective of growth units, the growth mechanism of Mg2(OH)2CO3·3H2O whisker is investigated in this paper. Results show that the growth morphology of Mg2(OH)2CO3·3H2O whisker is consistent with the model of anion coordination polyhedron growth units. The growth solution Raman shift of Mg2(OH)2CO3·3H2O was monitored using Raman spectroscopy. The growth units are [Mg-(OH)4]2- and H2CO3. The growth process of Mg2(OH)2CO3·3H2O whisker is as follows: growth unit [Mg-(OH)4]2- first incorporates into the larger dimension [Mg-(OH)4] 2- n , then the [Mg-(OH)4] 2- n combines with H2CO3 into a linear skeleton Mg2(OH)2CO3 in the same line. Mg2(OH)2CO3 combines with H2O by hydrogen bonds and ultimately transforms into Mg2(OH)2CO3·3H2O whisker. Magnesium carbonate whiskers have a layered structure, each of which is made of magnesium, carbon, oxygen, with H2O in between each layer. When skeletons are superimposed within the same plane as a parallelepiped one, they grow into solid cuboid-shaped whiskers. When the parallelepiped skeletons planes combine with each other through the cascading links, they grow into hollow cylindrical whiskers.
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Funded by the National Natural Science Foundation of China(No.51272207)
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Wu, J., Gao, Y. Mg2(OH)2CO3·3H2O whiskers growth mechanism. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 31, 509–514 (2016). https://doi.org/10.1007/s11595-016-1400-1
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DOI: https://doi.org/10.1007/s11595-016-1400-1