摘要
以表面孔径为0.1μm的α-Al2O3陶瓷管为支撑载体,以硝酸锰和硝酸锂为主要原料,先采用水热法进行预成膜,再采用溶胶-凝胶法复合制备膜状含锂锰氧化物,利用XRD和SEM对合成产物进行表征,并进行单一气体渗透性能测试。结果表明,合成产物为膜状的锂离子筛前驱体LiMn2O4;膜的表面连续致密,没有明显的晶间孔和裂缺,膜厚度约为1μm;室温下膜对H2的渗透率为1.09×10-6 mol·s-1·m-2·Pa-1,H2/N2的理想分离因数达3.63,具有较好的选择分离性。研究结果为基于锂离子筛膜的连续化海水提锂技术开发提供了材料支撑。
Using a-A12O3 ceramics tube which had 0. 1μm aperture as the carrier, Mn（NO3 ）2 and LiNO3 as main raw materials, Li-Mn Oxides thin film was prepared by hydrothermal and sol-gel methods in turn. The obtained films were characterized by XRD, SEM and permeability test for H2 and N2. The results showed that the films consist of well-crystal lized LiMn2 04 ;the lithium ion-sieve membranes were continuous and good densification, and thickness of the film was ap- proximately lμm; the permeability for H2 was 1.09x 10^-6 mol· s^-1·m^-2· Pa^-1 and the ideal separation for H2/N2 was a- bout 3.63 at room temperature. The film had a certain selectivity and separation properties and is helpful for continuous lithium extraction from seawater.
出处
《化工新型材料》
CAS
CSCD
北大核心
2012年第12期56-57,72,共3页
New Chemical Materials
基金
国家自然科学基金(20806019)
长江学者和创新团队发展计划(IRT1059)
天津市应用基础及前沿技术研究计划(12JCQNJC03300)
河北省科学技术研究与发展计划(12276713D)
河北省自然科学基金(B2009000024
B2010000021)
关键词
水热合成
溶胶-凝胶
锂离子筛膜
选择分离
hydrothermal synthesis, sol-gel, lithium ionic sieve membrane, preferential segregation
