Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 703, Issue -, Pages 96-102Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.01.197
Keywords
TiO2 nanocrystals; Ultrasonic irradiation; Disorder modification; Hydroxyls injection; Photocatalytic activity
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Funding
- National Natural Science Foundation of China [51229201, 51272231]
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Disorder modification of TiO2 nanocrystals (NCs) has been proved to enhance the photocatalytic activity through surface defects and band-gap narrowing. In this contribution, we used a facile way of ultrasonic irradiation to induce the hydroxyls injection into TiO2 (P25) crystal lattice, which obtained disordered TiO2 NCs. In order to improve the degree of ultrasonic-induced disorder, extension of ultrasonic time or increasing alkalinity was necessary, which continuously regulated the energy band structure of TiO2 and could at most improve the solar-driven photocatalytic activity for 2.33 times than original P25 NCs. (C) 2017 Elsevier B. V. All rights reserved.
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