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Title: Enhancement of photocatalytic performance of TiO{sub 2} produced by an alcohothermal approach through inclusion of water

Graphical abstract: - Highlights: • High crystallinity of TiO{sub 2} with exposed (0 0 1) facets was prepared by an alcohothermal approach through inclusion of water. • Water played an important role in conducting the size, shape, crystallinity, microstructure and photocatalytic activity of TiO{sub 2}. • High crystallinity of TiO{sub 2} could retard the recombination and promote the separation of electron–hole pairs. - Abstract: High crystallinity of TiO{sub 2} nanoparticles (NPs) with exposed (0 0 1) facets was prepared by an alcohothermal method without the addition of any specific organic reagents, in which titanium isopropoxide was used as the titania precursor, water and ethanol (0.6/90–5/90, v/v) as the reaction medium. The X-ray powder diffraction (XRD) and transmission electron microscope (TEM) measurements showed that water played an important role in conducting the size, shape, crystallinity and microstructure of TiO{sub 2} NPs. The photoluminescence spectroscopy and photocurrent measurements indicated that enhanced crystallinity could hinder effectively the recombination and promote significantly the separation of electron–hole pairs in TiO{sub 2} NPs. These will contribute to the enhancement of photocatalytic performance. Methyl orange photodegradation under UV light confirmed that high crystallinity of TiO{sub 2} NPs did exhibit a high photocatalytic activity due to the effectivemore » separation of photoinduced charges and exposure of highly reactive (0 0 1) facets.« less
Authors:
 [1] ;  [2] ;  [1] ;  [2] ;  [1] ;  [2] ;  [3] ; ; ; ;  [1] ;  [2]
  1. Jiangxi Key Laboratory of Surface Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013 (China)
  2. (China)
  3. Department of Chemistry, Nanchang University, Nanchang 330013 (China)
Publication Date:
OSTI Identifier:
22348630
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 53; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ETHANOL; INCLUSIONS; METHYL ORANGE; MICROSTRUCTURE; NANOPARTICLES; PHOTOCATALYSIS; PHOTOLUMINESCENCE; SPECTROSCOPY; TITANIUM; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY; WATER; X-RAY DIFFRACTION