SO2-4对电沉积法制备氢氧化镁的影响

doi:10.12068/j.issn.1005-3026.2020.10.008

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (10): 1415-1420.DOI: 10.12068/j.issn.1005-3026.2020.10.008

SO^2-₄对电沉积法制备氢氧化镁的影响

狄跃忠，马广超，沈自强，崔智春

(东北大学冶金学院，辽宁沈阳110819)

收稿日期:2020-04-01 修回日期:2020-04-01 出版日期:2020-10-15 发布日期:2020-10-20
通讯作者: 狄跃忠
作者简介:狄跃忠(1983-)，男，山西大同人，东北大学副教授.
基金资助:
国家自然科学基金资助项目(21878045).

Effect of SO^2-₄ on Preparation of Magnesium Hydroxide by Electrode Position

DI Yue-zhong， MA Guang-chao， SHEN Zi-qiang， CUI Zhi-chun

School of Metallurgy， Northeastern University， Shenyang 110819， China.

Received:2020-04-01 Revised:2020-04-01 Online:2020-10-15 Published:2020-10-20
Contact: MA Guang-chao
About author:-
Supported by:
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摘要/Abstract

摘要： 以海绵钛副产品氯化镁为原料，采用水溶液电沉积法制备氢氧化镁时，氢氧化镁团聚严重，且在极板上脱落困难.通过向电解液中加入适量SO^2-₄来优化氢氧化镁分散性，可有效解决氢氧化镁团聚严重的问题.探究了SO^2-₄对氢氧化镁脱落性能、产物形貌及生长方式的影响.结果表明:SO^2-₄的质量浓度对氢氧化镁初始脱落时间影响较大，SO^2-₄的质量浓度为0.45g/L时，氢氧化镁性能最佳，初始脱落时间最短约 10min；氢氧化镁在极板上结晶长大时，生长方式为层岛复合生长模式，同时发现添加SO^2-₄后，能够诱导氢氧化镁以阶梯状的方式生长.

关键词: 硫酸根, 电沉积, 氢氧化镁, 团聚, 生长方式

Abstract: Using the by-product of magnesium chloride from titanium sponge as a raw material， the magnesium hydroxide ［Mg(OH)₂］ prepared by the aqueous solution electrode position method was agglomerated dramatically and it was difficult to fall from the electrode plate. By adding a certain amount of SO^2-₄ into the electrolyte to improve the dispersion of Mg(OH)₂， the serious agglomeration can be avoided effectively. The effect of SO^2-₄ on the shedding performance， product morphology and growth mode of Mg(OH)₂ was studied. The results show that the SO^2-₄ concentration has a great influence on the initial shedding time of Mg(OH)₂. When the SO^2-₄ concentration is 0.45g/L， the performance of Mg(OH)₂ is the best， associated with the initial shedding time about 10min. When the Mg(OH)₂ crystals grow on the electrode plate， the growth mode is the layered-island composite growth. Meanwhile， it is also found that the addition of SO^2-₄ can induce the Mg(OH)₂ to grow in a stepped manner.

Key words: SO^2-₄, electrode position, magnesium hydroxide, agglomeration, growth mode

中图分类号:

TF111.52+1

狄跃忠，马广超，沈自强，崔智春. SO^2-₄对电沉积法制备氢氧化镁的影响[J]. 东北大学学报:自然科学版, 2020, 41(10): 1415-1420.

DI Yue-zhong， MA Guang-chao， SHEN Zi-qiang， CUI Zhi-chun. Effect of SO^2-₄ on Preparation of Magnesium Hydroxide by Electrode Position[J]. Journal of Northeastern University Natural Science, 2020, 41(10): 1415-1420.

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SO^2-₄对电沉积法制备氢氧化镁的影响

Effect of SO^2-₄ on Preparation of Magnesium Hydroxide by Electrode Position

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