摘要
研究了“8”字形碱式硫酸镁(5Mg(OH)_(2)·MgSO_(4)·3H_(2)O)晶须生长机制。晶须样品采用SEM及XRD作形貌和属性分析,采用拉曼光谱指认了生长基元的结构。结合表征结果,提出了“8”字形碱式硫酸镁晶须生长过程为:生长基元[Mg-(OH)_(4)]^(2-)先在一维方向上联结为大维度的{[Mg-(OH)_(4)]^(2-)}_(2)生长基元,{[Mg-(OH)_(4)]^(2-)}_(2)再通过垂直的空间关系与SO_(4)^(2-)相联结,由于硫酸根的硫氧双键平面与硫氧单键平面是垂直关系,致使与SO 2-4联结的晶列也处于垂直关系,晶列上的羟基再通过氢键相吸引旋转而成为“8”字形结构。
The growth mechanism of“8”-shaped basic magnesium sulfate(5Mg(OH)_(2)·MgSO_(4)·3H_(2)O)whiskers were studied.The morphology and properties of the whiskers were analyzed by SEM and XRD,and the structure of the growth units were identified by Raman spectroscopy.Combined with the characterization results,the growth process of"8"-shaped basic magnesium sulfate whiskers were proposed as follows:the growth units [Mg-(OH)_(4)]^(2-) were first connected into a large-scale growth units {[Mg-(OH)_(4)]^(2-)}_(2) in one-dimensional direction,and then the {[Mg-(OH)_(4)]^(2-)}_(2)were connected with each other through vertical spatial relationship.Because the sulfur oxygen double bond plane of sulfate radical is perpendicular to the sulfur oxygen single bond plane,the crystal array connected with SO_(4)^(2-) were also perpendicular,and the hydroxyl groups on the crystal array are attracted and rotated by hydrogen bonds to form an"8"shape structure.
作者
吴健松
简艺
WU Jian-song;JIAN Yi(Guangdong Preschool Normal College in Maoming,Maoming 525000,China;School of Chemistry and Chemical Engineering of Lingnan Normal University,Zhanjiang 524048,China)
出处
《盐科学与化工》
2021年第7期21-24,共4页
Journal of Salt Science and Chemical Industry
基金
国家自然科学基金(51272207)
广东省科技计划(2013B021100019)。
关键词
拓展的ACP机制
晶体生长机制
晶须生长机制
碱式硫酸镁晶须
Extended ACP mechanism
Crystal growth mechanism
Whisker growth mechanism
Basic magnesium sulfate whisker
作者简介
吴健松(1976-),男,博士,副教授,主要从事镁类晶须生长机制研究工作。联系方式:13729064460,wujs1976@aliyun.com。
