کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1626412 1516442 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The evolution of morphology and crystal form of titanate nanotubes under calcination and its mechanism
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
The evolution of morphology and crystal form of titanate nanotubes under calcination and its mechanism
چکیده انگلیسی

Titanate nanotubes with an outer diameter of ca. 9 nm were obtained with hydrothermal method followed by an ion exchange reaction. The as-prepared sample was composed of H2Ti2O4(OH)2, which was thermally unstable. The effect of calcination temperature on its morphology and crystal form was investigated. Based on the results, especially the appearance of lotus-root-like structures, the transformation mechanism was proposed, which involved the dehydrations of intralayered and interlayered OH groups. The decrease in the interlayer distance and the transformation from titanate to anatase were ascribed to the interlayered dehydration, while the destruction of nanotubes into particles was caused by the intralayered one.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 431, Issues 1–2, 4 April 2007, Pages 230–235
نویسندگان
, , , , ,