复合法制备LiMn_2O_4及最优条件的确定  

Preparation of LiMn_2O_4 by composite method and determination of optimum conditions

作　　者：吴如云 殷晓伟 居沈贵 WU Ru-yun;YIN Xiao-wei;JU Shen-gui(College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;Jiangsu Fangyuan Pharmaceutical Co. , Changzhou 213000, China)

机构地区：[1]南京工业大学化工学院,江苏南京210009 [2]江苏方圆制药有限公司,江苏常州213000

出　　处：《应用化工》2018年第4期675-678,683,共5页Applied Chemical Industry

基　　金：国家自然科学基金(U1407122);江苏省创新项目(KYLX15_0796)

摘　　要：以Mn(NO_3)_2为锰源,LiOH为锂源,H_2O_2为氧化剂,采用复合法制备Li Mn_2O_4,对共沉淀、水热和煅烧三个过程进行考察。结果表明,制备LiMn_2O_4的优化条件为:H_2O_2用量1.5 m L,摩尔比n(Li/Mn)=3,水热温度为170℃,反应时间为10 h,在700℃煅烧10 h,获得的LiMn_2O_4前驱体具有最稳定结构,颗粒粒径在50 nm左右,经酸洗后得到离子筛,其吸附容量达32.4 mg/g。LiMn2O4 was successfully prepared by using Mn（NO3）2 as Mn source,Li OH as lithium source and H2O2 as oxidant. The three processes of co-precipitation,hydrothermal and calcination were investigated. The optimized experiment was carried out to prepare the ion sieve： the amount of H2O2 was 1. 5 m L,n（ Li/Mn） = 3,the hydrothermal temperature was 170 ℃,the reaction time was 10 h,and the synthetic sample was calcined at 700 ℃ for 10 h. The LiMn2O4 precursor obtained after the calcination has the most stable structure,the size of which was 50 nm and the adsorption capacity reached 32. 4 mg/g after acid leaching.

关 键 词：LIMN2O4 复合法 离子筛 吸附性能 

分 类 号：TQ131.1[化学工程—无机化工]