Partial alkali-metal ion extraction from K0.8(Li0.27Ti1.73)O4 using PTFE as an extraction reagent†
Partial alkali-metal ion extraction from K0.8(Li0.27Ti1.73)O4 using PTFE as an extraction reagent†
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使用 PTFE 作为萃取剂从 K0.8(Li0.27Ti1.73)O4 中萃取部分碱金属离子†
DOI：
10.1039/c4dt01869a
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发表时间：
2014
影响因子：
4
通讯作者：
Takayoshi Sasaki
中科院分区：
文献类型：
--
作者：
Tadashi C. Ozawa;Takayoshi Sasaki
通过表征部分碱金属离子提取的层状化合物K0.8（Li0.27Ti1.73）O 4，澄清了惰性材料聚四氟乙烯（PTFE;经验式CF2）的碱金属离子提取能力。在水中洗涤K0.8（Li0.27Ti1.73）O 4仅提取了44%的层间K+，而没有层内Li+;另一方面，通过在350 °C下在流动Ar下与PTFE反应，从K0.8（Li0.27Ti1.73）O 4提取了53%的层间K+和约10%的层内Li+离子。观察到晶格参数a和c沿着层内方向的系统性降低和B沿着层间方向的增加，与作为反应温度和反应的PTFE量的函数的碱金属离子脱嵌量一致。在与K0.8（Li0.27Ti1.73）O 4：CF 2 = 1：0.6（摩尔比）反应后，晶格参数B从原始K0.8（Li0.27Ti1.73）O 4的1.5522（2）增加到1.5607（3）nm，并且晶格参数的这种变化比a和c中的晶格参数的变化大大约一个数量级。
The alkali-metal ion extraction ability of an inert material, polytetrafluoroethylene (PTFE; empirical formula CF2), was clarified by characterizing a partially alkali-metal ion-extracted layered compound, K0.8(Li0.27Ti1.73)O4. Washing K0.8(Li0.27Ti1.73)O4 in water extracts only 44% of the interlayer K+ and no intralayer Li+; on the other hand, 53% of the interlayer K+ and approximately 10% of the intralayer Li+ ions were extracted from K0.8(Li0.27Ti1.73)O4 by the reaction with PTFE at 350 °C under flowing Ar. A systematic decrease in the lattice parameters a and c along the intralayer directions and an increase in b along the interlayer direction were observed, consistent with the alkali-metal ion deintercalation amount as a function of the reaction temperatures and the reacted PTFE amounts. After the reaction with K0.8(Li0.27Ti1.73)O4 : CF2 = 1 : 0.6 in mol, the lattice parameter b increased to 1.5607(3) nm from 1.5522(2) of the pristine K0.8(Li0.27Ti1.73)O4, and this change in the lattice parameter was approximately one order of magnitude larger than those in a and c.