کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1618076 1005699 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Lead titanate nanotubes synthesized via ion-exchange method: Characteristics and formation mechanism
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Lead titanate nanotubes synthesized via ion-exchange method: Characteristics and formation mechanism
چکیده انگلیسی

A two-step method is presented for the synthesis of one dimensional lead titanate (PbTi3O7) nanotubes. Firstly, titanate nanotubes were prepared by an alkaline hydrothermal process with TiO2 nanopowder as precursor, and then lead titanate nanotubes were formed through an ion-exchange reaction. We found that sodium titanate nanotubes have ion exchangeability with lead ions, while protonated titanate nanotubes have not. For the first time, we distinguished the difference between sodium titanate nanotubes and protonated titanate nanotubes in the ion-exchange process, which reveals a layer space effect of nanotubes in the ion-exchange reaction. In comparison with sodium titanate, the synthesized lead titanate nanotubes show a narrowed bandgap.


► Lead titanate nanotubes PbTi3O7 were firstly synthesized by ion-exchange method.
► Sodium titanate nanotubes have ion exchangeability.
► Lead titanate nanotubes show a distinct red shift on absorption edge.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 509, Issue 20, 19 May 2011, Pages 6061–6066
نویسندگان
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