摘要
研究了γ-Al2O3在不同室温离子液体中的溶解性能,发现甘油的加入可以大幅提高γ-Al2O3在[bmim]BF4和[emim]BF4离子液体中的溶解度,这为在室温离子液体中电沉积铝提供了可能。通过实验考察了甘油的加入量和温度对γ-Al2O3在[emim]BF4中溶解度的影响。结果表明,在100℃下加入等体积的甘油,γ-Al2O3在[emim]BF4离子液体中的溶解度为0.058 g mL 1。随着温度的升高,γ-Al2O3的溶解度增大:160℃时γ-Al2O3的溶解度达到了0.097 g mL 1。根据实验结果对甘油促进γ-Al2O3在[emim]BF4中溶解的原因进行了探讨,认为[emim]BF4能催化甘油脱水生成丙酮醇,[emim]BF4水解产生的HF促进了γ-Al2O3的溶解。
The solubility of γ-Al2O3 in different room-temperature ionic liquids was tested and the results show that the solubility of γ-Al2O3 in [emim]BF4 and [emim]BF4 increases significantly with the addition of glycerol,which offers a possibility for the electrodeposition of aluminum in ionic liquids.The influence of glycerol addition and temperature on the solubility of γ-Al2O3 were experimentally studied.In the BF4-glycerol mixture with volumetric ratio of 1：1,the solubility of γ-Al2O3 is 0.058 g.mL.1 at 100℃.Additionally,the solubility of γ-Al2O3 increases with increasing temperature and reaches 0.097 g.mL.1 at 160℃.According to the experimental results,the reason for the promotion of glycerol on the dissolution of γ-Al2O3 in [emim]BF4 was elucidated as follows： [emim]BF4 could catalyze the dehydration of glycerol to acetol,and the resultant HF formed from the hydrolysis of [emim]BF4 promotes the dissolution of γ-Al2O3.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2013年第1期7-10,共4页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金资助项目(21076059)
