Study on hydrothermal crystallization kinetics of magnesium oxysulfate nanowires

被引：0
|
作者：
Nai X. [1 ,2 ]
Wu P. [1 ,2 ,3 ]
Cheng Y. [1 ,2 ,3 ]
Xiao J. [1 ,2 ,3 ]
Liu X. [1 ,2 ]
Dong Y. [1 ,2 ]
机构：
[1] Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Qinghai, Xining
[2] Qinghai Technology Research and Development Center of Comprehensive Utilization of Salt Lake Resources, Qinghai, Xining
[3] University of Chinese Academy of Sciences, Beijing
来源：
Huagong Xuebao/CIESC Journal | 2022年 / 73卷 / 07期
关键词：
crystallization; hydrothermal; kinetics; magnesium oxysulfate; nanowires; nucleation;
D O I：
10.11949/0438-1157.20220219
中图分类号：
学科分类号：
摘要：
Using magnesium sulfate and sodium hydroxide as raw materials and potassium hydrogen phthalate as complexing agent, basic magnesium sulfate nanowires were prepared by complexation-hydrothermal method. The crystallization mechanism of magnesium oxysulfate (MOS) nanowire was investigated, and the crystallization kinetic equations were established by analyzing the concentration of Mg via the hydrothermal synthesis process. Then, the surface nucleation mode of the nanowire was confirmed. The results illustrated the crystallization of the nanowire was controlled by multi-core surface growth mode at 140℃ and 160℃. However, it changed to linear surface growth mode at 180℃ and 200℃. The microstructures of MOS nanowires were investigated by transmission electron microscopy. There are many edge dislocations and screw dislocations in the crystals, their effects in MOS nanowires on growth kinetics are to decrease the two-dimensional nucleation barrier and act as a self-perpetuating step sources. © 2022 Chemical Industry Press. All rights reserved.
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页码：3038 / 3044
页数：6
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