Issue 35, 2013
From the journal:

Journal of Materials Chemistry A

Synthesis of anatase TiO2nanocrystals with {101}, {001} or {010} single facets of 90% level exposure and liquid-phase photocatalytic reduction and oxidation activity orders†

Liqun Ye,ab   Jin Mao,a   Jinyan Liu,a   Zhuo Jiang,a   Tianyou Peng*a  and  Ling Zan*a  

* Corresponding authors

a College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072, China
E-mail: irlab@whu.edu.cn, typeng@whu.edu.cn
Fax: +86 27 8737 8727
Tel: +86 27 6875 2919

b College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, People's Republic of China

Abstract

Anatase TiO2 nanocrystals with {101}, {001} or {010} single facets of 90% level exposure were controllably synthesized from potassium titanate (PT) without fluorine and organic capping surfactants, and characterized by X-ray diffraction patterns (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and fast Fourier transformation (FFT). The liquid-phase photocatalytic reduction (O2˙− generation) and oxidation (˙OH generation) activity orders of anatase TiO2 facets are {001} > {101} > {010} upon removing facet synergetic effect and surface fluorine effect. UV-vis diffuse reflectance spectra (DRS) and photoluminescence (PL) spectra showed that absorbance edge order, and separation efficiency order of photoexcited holes and electrons are {001} > {101} > {010}, which explains the photocatalytic activity order well together with the atomic arrangement of different facets.

Graphical abstract: Synthesis of anatase TiO2 nanocrystals with {101}, {001} or {010} single facets of 90% level exposure and liquid-phase photocatalytic reduction and oxidation activity orders

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Article information

DOI
https://doi.org/10.1039/C3TA11791J
Article type
Paper
Submitted
07 May 2013
Accepted
29 Jun 2013
First published
01 Jul 2013

J. Mater. Chem. A, 2013,1, 10532-10537

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Synthesis of anatase TiO2 nanocrystals with {101}, {001} or {010} single facets of 90% level exposure and liquid-phase photocatalytic reduction and oxidation activity orders

L. Ye, J. Mao, J. Liu, Z. Jiang, T. Peng and L. Zan, J. Mater. Chem. A, 2013, 1, 10532 DOI: 10.1039/C3TA11791J

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