钛系锂离子筛的制备研究

Study on Preparation of Ti-based Iithium-ion Sieve

文章以二氧化钛(TiO_(2))和碳酸锂(Li_(2)CO_(3))作为钛源和锂源,通过高温固相法制备钛系锂离子筛前驱体Li_(2)TiO_(3)(LTO),用稀HCl对前驱体LTO进行酸洗,经Li^(+)与H^(+)交换后得到钛系锂离子筛H_(2)TiO_(3)(HTO)。通过XRD、SEM等手段对钛系锂离子筛结构、形貌进行表征。考察了煅烧温度、酸洗浓度、酸洗温度、酸洗时间等因素对钛系锂离子筛吸附性能的影响。实验结果表明:在850℃条件下煅烧10h,制备得到LTO。进一步将LTO在80℃的条件下用0.20mol/LHCl溶液酸洗6h,可制得HTO吸附剂。HTO吸附剂对溶液中锂离子的吸附容量(Q_e)最高达到28.83mg/g。

In this paper,titanium dioxide(TiO_(2))and lithium carbonate(Li_(2)CO_(3))were used as titanium sources and lithium sources,and the titanium lithium ion screen precursor Li_(2)TiO_(3)(LTO)was prepared by high temperature solid phase method.The precursor LTO was acid-washed with HCl,and the titanium lithium ion screen H_(2)TiO_(3)(HTO)was obtained after exchange between Li+and H+.The structure and morphology of titanium lithium ion screen were characterized by XRD and SEM.The effects of calcination temperature,pickling concentration,pickling temperature and pickling time on the adsorption properties of titanium lithium ion screen were investigated.The experimental results showed that LTO was prepared by calcination at 850℃for 10 h.The HTO adsorbent can be prepared by pickling LTO at 80℃with 0.20 mol/L HCl solution for 6 h.The adsorption capacity(Qe)of HTO adsorbent for lithium ions in solution was up to 28.83 mg/g.