定量空气中三元FeCl_3-NiCl_2-石墨层间化合物的制备

PREPARATION OF TERNARY FeCl_3-NiCl_2-GRAPHITE INTERCALATION COMPOUNDS IN PRESENCE OF TRACE AMOUNT OF AIR

采用熔盐法,以天然鳞片石墨为宿主,NiCl2与FeCl3的混合物为插层剂制备三元FeCl3-NiCl2-GIC。改真空下熔封玻璃管为在空气中直接熔封玻璃管,在反应体系中存在少量空气的条件下,考察了石墨与氯化物的摩尔比、NiCl2与FeCl3的摩尔比、反应温度和反应时间等工艺因素对产物阶结构的影响。结果表明,改变反应体系中石墨与氯化物的摩尔比、FeCl3与NiCl2的摩尔比、反应温度和保温时间,在反应初期存在一定量空气的条件下也可以得到阶结构不同的FeCl3-NiCl2-GIC。当石墨与氯化物的摩尔比为3/1,FeCl3与NiCl2的摩尔比为7/3,反应温度为400℃,反应时间为24h时,所得产物为二阶FeCl3-NiCl2-GIC。

Ternary FeCh - NiCh - GICs were synthesized using molten salts method, with natural graphite flake as host and the mixed NiCh and FeCh as guest. The glass tube was sealed by fusing in air and there were small quantity air in the reaction system. The effects of the mole ratio of carbon to metal chlorides, mole ratio of NiCh to FeCh, reaction temperature and reaction time on the stage structure of the final products were studied. The results show that ternary FeCh - NiCh - GICs with different stage structure could be obtained by changing mole ratio of carbon to metal chlorides, mole ratio of NiCh to FeCh, reaction temperature and reaction time. When the mole ratio of carbon to metal chlorides is 3：1 and mole ratio of FeCh to NiCl2 is 7： 3, FeCh - NiCh - GICs with second - stage structure can be obtained at 400 ℃ in 24 hours.