Crystal facet growth behavior and thermal stability of {001} faceted anatase TiO2: mechanistic role of gaseous HF and visible-light photocatalytic activity

Wei Wang; Chunhua Lu; Yaru Ni; Zhongzi Xu

doi:10.1039/C2CE26702K

You do not have JavaScript enabled. Please enable JavaScript to access the full features of the site or access our non-JavaScript page.

Crystal facet growth behavior and thermal stability of {001} faceted anatase TiO₂: mechanistic role of gaseous HF and visible-light photocatalytic activity†

Wei Wang,^a Chunhua Lu,*^a Yaru Ni^a and Zhongzi Xu*^a

Author affiliations

* Corresponding authors

^a State Key Laboratory of Materials-Orient Chemical Engineering, College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, P. R. China
E-mail: lchnjut@163.com, xzznjut@163.com
Fax: +86-25-83587220
Tel: +86-25-83587252

Abstract

Thermal stability and crystal facet growth behavior of anatase TiO₂ nanosheets with exposed high-reactive {001} facets were systematically investigated by heating a mixture of TiO₂ and NH₄F. Results indicate that anatase TiO₂ nanosheets can grow into {001} facets dominated anatase TiO₂ microsheets through surface fusion along the [001] crystallographic direction by employing gaseous HF as the capping agent. By controlling the initial concentration of NH₄F, visible-light responsive TiO₂ sheets with different sizes, percentages of {001} facets, and inner structures were obtained, hence, the crystal facet growth mechanism and thermal stability of the {001} facets were proposed. Owing to the exposed high-reactive facets, incorporated N species, and little surface adsorbed F atoms, the as-prepared samples exhibited enhanced visible-light photocatalytic activity.

Download options Please wait...

Supplementary files

Supplementary information PDF (135K)

Article information

DOI: https://doi.org/10.1039/C2CE26702K
Article type: Paper
Submitted: 18 Oct 2012
Accepted: 13 Dec 2012
First published: 17 Dec 2012

Download Citation

CrystEngComm, 2013,15, 2537-2543

Permissions

Request permissions

Crystal facet growth behavior and thermal stability of {001} faceted anatase TiO₂: mechanistic role of gaseous HF and visible-light photocatalytic activity

W. Wang, C. Lu, Y. Ni and Z. Xu, CrystEngComm, 2013, 15, 2537 DOI: 10.1039/C2CE26702K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Social activity

Fetching data from CrossRef.
This may take some time to load.

CrystEngComm