水热法酸处理制备 TiO2 衍生钛酸盐纳米管及其微观结构评价。

TiO2-derived titanate nanotubes by hydrothermal process with acid treatments and their microstructural evaluation.

机构信息

Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuencho, Naka-ku, Sakai, Osaka 599-8531, Japan.

出版信息

ACS Appl Mater Interfaces. 2010 Sep;2(9):2611-6. doi: 10.1021/am1004442.

DOI:10.1021/am1004442

PMID:20718481

Abstract

In this study, the effect of post acid treatments with HCl aqueous solutions after the hydrothermal process on the microstructure of TiO2-derived titanate nanotube was investigated. Especially, the relationship between local structural changes with the HCl treatment and their thermal stability were investigated by X-ray absorption fine structure (XAFS). Consequently, it revealed that the replacement of Na+ with H+ (proton exchange) in TiO2-derived titanate nanotubes was caused by the acid treatment with HCl aqueous solutions and the excess acid treatment led to the disordering. Moreover, it was confirmed that the minor change of TiOx polyhedra in TiO2-derived titanate nanotubes was also related with this disordering.

摘要

在这项研究中，研究了水热后用盐酸水溶液进行后酸处理对 TiO2 衍生的钛酸盐纳米管微观结构的影响。特别是，通过 X 射线吸收精细结构 (XAFS) 研究了局部结构变化与 HCl 处理之间的关系及其热稳定性。结果表明，HCl 水溶液的酸处理导致 TiO2 衍生的钛酸盐纳米管中 Na+被 H+（质子交换）取代，过量的酸处理导致结构无序。此外，还证实 TiO2 衍生的钛酸盐纳米管中 TiOx 多面体的微小变化也与这种无序有关。