大颗粒磷钼酸铵:制备与结晶动力学

引用本文: 黄云敬, 刘珊, 阳卫军. 大颗粒磷钼酸铵:制备与结晶动力学[J]. 无机化学学报, 2015, (4): 789-797. doi: 10.11862/CJIC.2015.099 shu

Citation: HUANG Yun-Jing, LIU Shan, YANG Wei-Jun. Large Particle Ammonium Molybdophosphate: Preparation and Crystallization Kinetics[J]. Chinese Journal of Inorganic Chemistry, 2015, (4): 789-797. doi: 10.11862/CJIC.2015.099 shu

大颗粒磷钼酸铵:制备与结晶动力学

1.
湖南大学化学化工学院, 长沙 410082

通讯作者: 阳卫军 wjyang@hnu.edu.cn

基金项目:
中央高校基本科研业务费专项基金(No.11070210)资助项目。 (No.11070210)

摘要: 通过缓慢滴加焦磷酸钾的硝酸溶液到钼酸铵溶液中制得了大颗粒磷钼酸铵(AMP)。研究了AMP的成核速率(G)与晶体生长速率。与晶体生长速率相比成核速率的反应级数更高。最初,大颗粒磷钼酸铵的结晶过程处于相变反应控制的动力学区域,此时溶液的过饱和生成速率比过饱和消除速率高。晶体线生长速率与溶液的过饱和度先增加后降低。在滴加中期,过饱和消除速率增长到与其生成速率相当。在滴加后期,晶体成核速率快速增高,而晶体的线生长速率下降。晶体的成核速率成为过饱和消除的唯一控制步骤。因此,AMP成核大部分是在首先接触到滴加液的局部溶液中完成的。

关键词:

晶体生长;磷钼酸铵;X射线衍射;成核速率;动力学;晶体线生长速率

English

Large Particle Ammonium Molybdophosphate: Preparation and Crystallization Kinetics

1.
College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China

Corresponding author: 阳卫军 wjyang@hnu.edu.cn

Received Date: 12 October 2014
Fund Project:
中央高校基本科研业务费专项基金(No.11070210)资助项目。

Abstract: Large particle ammonium molybdophosphate (AMP) was prepared by slowly dropping a nitric acid solution of potassium pyrophosphate into an ammonium molybdate solution. The nucleation rate (G) and crystal growth rate for AMP were studied. Compared with crystal growth, the nucleation has a higher reaction order. Initially, large particle AMP crystallizes in the kinetic region controlled by phase transfer reaction when the growing speed of supersaturation is higher than the removing speed. The crystal linear growth rate (L) and supersaturation degree (ΔC) of the solution increases first and decreases thereafter. In the medium dropping stage, the increase in removing speed of supersaturation is the same as the growing speed. During the late dropping stage, the nucleation rate rises rapidly when the crystal linear growth rate decreases and the nucleation rate is the only control step for the removing speed of supersaturation. Therefore, the nucleation of AMP almost completes in local solution as soon as meeting the nitric acid solution.

Key words:

crystal growth;ammonium molybdophosphate;X-ray diffraction;nucleation rate;kinetics;crystal linear growth rate

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

大颗粒磷钼酸铵:制备与结晶动力学

通讯作者: 阳卫军 wjyang@hnu.edu.cn

English

Large Particle Ammonium Molybdophosphate: Preparation and Crystallization Kinetics

Corresponding author: 阳卫军 wjyang@hnu.edu.cn

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

大颗粒磷钼酸铵:制备与结晶动力学

通讯作者: 阳卫军 wjyang@hnu.edu.cn

English

Large Particle Ammonium Molybdophosphate: Preparation and Crystallization Kinetics

Corresponding author: 阳卫军 wjyang@hnu.edu.cn

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

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CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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