Study on transformation mechanism of lithium titanate modified with hydrochloric acid

被引：28

作者：

Zhang, Liyuan ^{[1
,2
]}

He, Gang ^{[2
]}

Zhou, Dali ^{[2
]}

Zhou, Jiabei ^{[2
]}

Yao, Qianqian ^{[2
]}

机构：

[1] Neijiang Normal Univ, Coll Chem & Chem Engn, Neijiang 641000, Peoples R China

[2] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610065, Peoples R China

来源：

IONICS | 2016年 / 22卷 / 11期

关键词：

Lithium titanate; Adsorption; Dissolution-recrystallization; Rearrangement; IN-SITU HYDROLYSIS; H2TIO3-LITHIUM ADSORBENT; PHASE-TRANSFORMATION; LI2TIO3; PEBBLES; ANATASE; NANOPARTICLES; FABRICATION; LI4TI5O12; RECOVERY; POWDERS;

D O I：

10.1007/s11581-016-1742-x

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of the concentration of hydrochloric acid and treatment time on the transformation of Li2TiO3 were studied in detail. The results demonstrate that lithium ions are easily removed from the (-133) and (-206) planes. In contrast, Li+ extraction requires a longer time for the (002) and (-131) planes. A mixture of the anatase and rutile phases, pure rutile, and pure anatase can be generated by treating Li2TiO3 with a suitable concentration of hydrochloric acid for an appropriate amount of time. The phase(s) that are present significantly affect the cyclic adsorption performance of a titanium lithium ion sieve and the dissolution of Ti. The transformation from H2TiO3 particles to TiO2 primarily occurs via the dissolution-recrystallization process. The electrophilic H+ and highly electronegative Cl- affect the Ti-O bond, resulting in the destruction of the Ti-O bond in TiO6 octahedrons, promoting the structural rearrangement of anatase to rutile TiO2.

引用

页码：2007 / 2014

页数：8

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