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Title: Microstructures and photocatalytic properties of Ag{sup +} and La{sup 3+} surface codoped TiO{sub 2} films prepared by sol-gel method

Abstract

Ag{sup +} and La{sup 3+} surface codoped TiO{sub 2} films were successfully prepared by the improved sol-gel and doping processes. The as-prepared specimens were characterized using differential thermal analysis-thermogravimetry (DTA-TG), X-ray diffraction (XRD), high-resolution field emission scanning electron microscopy (FE-SEM), X-ray energy dispersive spectroscopy (EDS), Brunauer-Emmett-Teller (BET) surface area, Photoluminescence spectrum (PL) and UV-vis diffuse reflectance spectroscopy. The photocatalytic activities of the films were evaluated by degradation of an organic dye in aqueous solution. The results of XRD, FE-SEM and BET analyses indicated that the TiO{sub 2} films were composed of nano-particles or aggregates with a size of less than 10 nm. With the codoping of Ag{sup +} and La{sup 3+}, TiO{sub 2} films with high photocatalytic activity and clearly responsive to the visible light were obtained. The improvement mechanism by ions doping was also discussed. - Graphical Abstract: The PL intensity of Ag{sup +} and La{sup 3+} surface codoped TiO{sub 2} was the lowest among all samples, indicating the recombination of electron and hole was effectively prohibited compared with pure TiO{sub 2}, Ag{sup +} and La{sup 3+} bulk codoped TiO{sub 2}. Highlights: > Ag{sup +} and La{sup 3+} codoping can reduce the crystal size of TiO{sub 2}. > Ag{supmore » +} and La{sup 3+} surface codoped TiO{sub 2} films have an obvious optical response red-shift. > Ag{sup +} and La{sup 3+} surface codoped TiO{sub 2} films can exhibit excellent photocatalytic activity under both UV and visible light irradiations.« less

Authors:
 [1];  [1];  [2]
  1. Key Laboratory of Chemical Sensing and Analysis, Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022 (China)
  2. China Petroleum Engineering and Construction Corporation, Beijing 100120 (China)
Publication Date:
OSTI Identifier:
21580036
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 184; Journal Issue: 10; Other Information: DOI: 10.1016/j.jssc.2011.08.014; PII: S0022-4596(11)00454-3; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AQUEOUS SOLUTIONS; CRYSTALS; DIFFERENTIAL THERMAL ANALYSIS; FIELD EMISSION; FILMS; LANTHANUM IONS; MICROSTRUCTURE; PHOTOCATALYSIS; PHOTOLUMINESCENCE; SCANNING ELECTRON MICROSCOPY; SILVER IONS; SOL-GEL PROCESS; SPECTROSCOPY; SURFACE AREA; SURFACES; THERMAL GRAVIMETRIC ANALYSIS; TITANIUM OXIDES; VISIBLE RADIATION; X RADIATION; X-RAY DIFFRACTION; CATALYSIS; CHALCOGENIDES; CHARGED PARTICLES; CHEMICAL ANALYSIS; COHERENT SCATTERING; DIFFRACTION; DISPERSIONS; ELECTROMAGNETIC RADIATION; ELECTRON MICROSCOPY; EMISSION; GRAVIMETRIC ANALYSIS; HOMOGENEOUS MIXTURES; IONIZING RADIATIONS; IONS; LUMINESCENCE; MICROSCOPY; MIXTURES; OXIDES; OXYGEN COMPOUNDS; PHOTON EMISSION; QUANTITATIVE CHEMICAL ANALYSIS; RADIATIONS; SCATTERING; SOLUTIONS; SURFACE PROPERTIES; THERMAL ANALYSIS; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS

Citation Formats

Nan, Zhao, Yao Mingming, E-mail: yaomm4364@sina.com, Fang, Li, and Feipeng, Lou. Microstructures and photocatalytic properties of Ag{sup +} and La{sup 3+} surface codoped TiO{sub 2} films prepared by sol-gel method. United States: N. p., 2011. Web. doi:10.1016/j.jssc.2011.08.014.
Nan, Zhao, Yao Mingming, E-mail: yaomm4364@sina.com, Fang, Li, & Feipeng, Lou. Microstructures and photocatalytic properties of Ag{sup +} and La{sup 3+} surface codoped TiO{sub 2} films prepared by sol-gel method. United States. doi:10.1016/j.jssc.2011.08.014.
Nan, Zhao, Yao Mingming, E-mail: yaomm4364@sina.com, Fang, Li, and Feipeng, Lou. Sat . "Microstructures and photocatalytic properties of Ag{sup +} and La{sup 3+} surface codoped TiO{sub 2} films prepared by sol-gel method". United States. doi:10.1016/j.jssc.2011.08.014.
@article{osti_21580036,
title = {Microstructures and photocatalytic properties of Ag{sup +} and La{sup 3+} surface codoped TiO{sub 2} films prepared by sol-gel method},
author = {Nan, Zhao and Yao Mingming, E-mail: yaomm4364@sina.com and Fang, Li and Feipeng, Lou},
abstractNote = {Ag{sup +} and La{sup 3+} surface codoped TiO{sub 2} films were successfully prepared by the improved sol-gel and doping processes. The as-prepared specimens were characterized using differential thermal analysis-thermogravimetry (DTA-TG), X-ray diffraction (XRD), high-resolution field emission scanning electron microscopy (FE-SEM), X-ray energy dispersive spectroscopy (EDS), Brunauer-Emmett-Teller (BET) surface area, Photoluminescence spectrum (PL) and UV-vis diffuse reflectance spectroscopy. The photocatalytic activities of the films were evaluated by degradation of an organic dye in aqueous solution. The results of XRD, FE-SEM and BET analyses indicated that the TiO{sub 2} films were composed of nano-particles or aggregates with a size of less than 10 nm. With the codoping of Ag{sup +} and La{sup 3+}, TiO{sub 2} films with high photocatalytic activity and clearly responsive to the visible light were obtained. The improvement mechanism by ions doping was also discussed. - Graphical Abstract: The PL intensity of Ag{sup +} and La{sup 3+} surface codoped TiO{sub 2} was the lowest among all samples, indicating the recombination of electron and hole was effectively prohibited compared with pure TiO{sub 2}, Ag{sup +} and La{sup 3+} bulk codoped TiO{sub 2}. Highlights: > Ag{sup +} and La{sup 3+} codoping can reduce the crystal size of TiO{sub 2}. > Ag{sup +} and La{sup 3+} surface codoped TiO{sub 2} films have an obvious optical response red-shift. > Ag{sup +} and La{sup 3+} surface codoped TiO{sub 2} films can exhibit excellent photocatalytic activity under both UV and visible light irradiations.},
doi = {10.1016/j.jssc.2011.08.014},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 10,
volume = 184,
place = {United States},
year = {2011},
month = {10}
}