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以氢氧化锂和乙酸锰为主要原料,采用溶胶-凝胶法合成了尖晶石型LiMn2O4前驱体,经酸浸脱锂后得到对Li+具有特殊选择性吸附的离子筛,采用XRD、SEM、吸附动力学等手段对前驱体及相应离子筛的晶相结构及吸附性能进行了研究。结果表明,由550℃煅烧10h制备出的前驱体LiMn2O4中表现出最好的结构稳定性,酸浸转型之后锂离子筛能够保持尖晶石锂锰氧化物的结构,离子筛的最大吸附容量达到32mg/g。
Lithium hydroxide and manganese acetate were used as raw materials to synthesize spinel LiMn2O4 precursor by sol-gel method. The ion sieves with special selective adsorption to Li + were obtained by acid leaching and desorption. The XRD, SEM, Adsorption kinetics and other means of precursor and the corresponding ion sieve crystal phase structure and adsorption properties were studied. The results show that LiMn2O4 prepared by calcination at 550 ℃ for 10h shows the best structural stability. After the acid leaching, the lithium ion sieve can maintain the structure of spinel lithium manganese oxide and the maximum adsorption capacity of the ion sieve reaches 32 mg / g.