CobaltMaghrebV1, PascalFrancis, Corpus, bibRecord, 000018

Heat treatment effect on the physical properties of cobalt doped TiO2 sol-gel materials

Identifieur interne : 000018 ( PascalFrancis/Corpus ); précédent : 000017; suivant : 000019

Heat treatment effect on the physical properties of cobalt doped TiO2 sol-gel materials

Auteurs : L. Samet ; J. Ben Nasseur ; R. Chtourou ; K. March ; O. Stephan

Source :

Materials characterization [ 1044-5803 ] ; 2013.

RBID : Pascal:14-0022698

Descripteurs français

Pascal (Inist)
- Traitement thermique, Propriété physique, Dopage, Oxyde de titane, Procédé sol gel.

English descriptors

KwdEn :
- Doping, Heat treatments, Physical properties, Sol-gel process, Titanium oxide.

Abstract

Cobalt doped and undoped TiO₂ powders have been prepared by sol-gel technique and annealed at temperatures ranging from 400 °C to 1000 °C. The effects of annealing temperature on the structural, morphological and optical properties have been characterized by X-ray diffraction, transmission electron microscopy, electron energy-loss spectroscopy and diffuse reflectance spectroscopy. For all doped samples there is a general reduction of the band gap energy, in comparison with undoped samples prepared in the same conditions. More specifically, experimental results indicate that cobalt doping, occurring as Co²⁺ ion insertion into the TiO₂ (Ti⁴⁺) host lattice, inhibits the growth of the crystallites and delays the phase transformation from anatase to rutile. Moreover, at high temperature, a secondary phase (CoTiO₃) is found to coexist with highly crystalline rutile. These structural characteristics are discussed in relation with the observed general trends for the optical properties.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

A01	`01`	`1`		`@0 1044-5803`
A03		`1`		`@0 Mater. charact.`
A05				`@2 85`
A08	`01`	`1`	`ENG`	`@1 Heat treatment effect on the physical properties of cobalt doped TiO₂sol-gel materials`
A11	`01`	`1`		`@1 SAMET (L.)`
A11	`02`	`1`		`@1 BEN NASSEUR (J.)`
A11	`03`	`1`		`@1 CHTOUROU (R.)`
A11	`04`	`1`		`@1 MARCH (K.)`
A11	`05`	`1`		`@1 STEPHAN (O.)`
A14	`01`			`@1 Institut Préparatoires aux Etudes d'Ingénieurs d'El-Manar, Université Tunis El Manar, Campus Universitaire @2 2092 El Manar @3 TUN @Z 1 aut.`
A14	`02`			`@1 Laboratoire de Photovoltaique de Semi-conducteur et de Nanostructure, Centre de Recherches et des Technologies de l'Energie, Technopole borj cedria, Bp 95, hammamm lif 2050 @3 TUN @Z 1 aut. @Z 2 aut. @Z 3 aut.`
A14	`03`			`@1 Laboratoire de Physique des Solides, UMR 8502 CNRS - Université Paris-Sud, Bât 510 @2 91405 Orsay @3 FRA @Z 4 aut. @Z 5 aut.`
A20				`@1 1-12`
A21				`@1 2013`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 14386 @5 354000501083080010`
A44				`@0 0000 @1 © 2014 INIST-CNRS. All rights reserved.`
A45				`@0 42 ref.`
A47	`01`	`1`		`@0 14-0022698`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 Materials characterization`
A66	`01`			`@0 USA`
C01	`01`		`ENG`	@0 Cobalt doped and undoped TiO₂ powders have been prepared by sol-gel technique and annealed at temperatures ranging from 400 °C to 1000 °C. The effects of annealing temperature on the structural, morphological and optical properties have been characterized by X-ray diffraction, transmission electron microscopy, electron energy-loss spectroscopy and diffuse reflectance spectroscopy. For all doped samples there is a general reduction of the band gap energy, in comparison with undoped samples prepared in the same conditions. More specifically, experimental results indicate that cobalt doping, occurring as Co²⁺ ion insertion into the TiO₂ (Ti⁴⁺) host lattice, inhibits the growth of the crystallites and delays the phase transformation from anatase to rutile. Moreover, at high temperature, a secondary phase (CoTiO₃) is found to coexist with highly crystalline rutile. These structural characteristics are discussed in relation with the observed general trends for the optical properties.
C02	`01`	`3`		`@0 001B80A30F`
C02	`02`	`X`		`@0 001D11C06`
C02	`03`	`X`		`@0 240`
C03	`01`	`3`	`FRE`	`@0 Traitement thermique @5 55`
C03	`01`	`3`	`ENG`	`@0 Heat treatments @5 55`
C03	`02`	`3`	`FRE`	`@0 Propriété physique @5 56`
C03	`02`	`3`	`ENG`	`@0 Physical properties @5 56`
C03	`03`	`X`	`FRE`	`@0 Dopage @5 57`
C03	`03`	`X`	`ENG`	`@0 Doping @5 57`
C03	`03`	`X`	`GER`	`@0 Dopen @5 57`
C03	`03`	`X`	`SPA`	`@0 Doping @5 57`
C03	`04`	`X`	`FRE`	`@0 Oxyde de titane @5 58`
C03	`04`	`X`	`ENG`	`@0 Titanium oxide @5 58`
C03	`04`	`X`	`GER`	`@0 Titanoxid @5 58`
C03	`04`	`X`	`SPA`	`@0 Titanio óxido @5 58`
C03	`05`	`3`	`FRE`	`@0 Procédé sol gel @5 59`
C03	`05`	`3`	`ENG`	`@0 Sol-gel process @5 59`
N21				`@1 020`
N44	`01`			`@1 OTO`
N82				`@1 OTO`

Format Inist (serveur)

NO :	PASCAL 14-0022698 INIST
ET :	Heat treatment effect on the physical properties of cobalt doped TiO₂sol-gel materials
AU :	SAMET (L.); BEN NASSEUR (J.); CHTOUROU (R.); MARCH (K.); STEPHAN (O.)
AF :	Institut Préparatoires aux Etudes d'Ingénieurs d'El-Manar, Université Tunis El Manar, Campus Universitaire/2092 El Manar/Tunisie (1 aut.); Laboratoire de Photovoltaique de Semi-conducteur et de Nanostructure, Centre de Recherches et des Technologies de l'Energie, Technopole borj cedria, Bp 95, hammamm lif 2050/Tunisie (1 aut., 2 aut., 3 aut.); Laboratoire de Physique des Solides, UMR 8502 CNRS - Université Paris-Sud, Bât 510/91405 Orsay/France (4 aut., 5 aut.)
DT :	Publication en série; Niveau analytique
SO :	Materials characterization; ISSN 1044-5803; Etats-Unis; Da. 2013; Vol. 85; Pp. 1-12; Bibl. 42 ref.
LA :	Anglais
EA :	Cobalt doped and undoped TiO₂ powders have been prepared by sol-gel technique and annealed at temperatures ranging from 400 °C to 1000 °C. The effects of annealing temperature on the structural, morphological and optical properties have been characterized by X-ray diffraction, transmission electron microscopy, electron energy-loss spectroscopy and diffuse reflectance spectroscopy. For all doped samples there is a general reduction of the band gap energy, in comparison with undoped samples prepared in the same conditions. More specifically, experimental results indicate that cobalt doping, occurring as Co²⁺ ion insertion into the TiO₂ (Ti⁴⁺) host lattice, inhibits the growth of the crystallites and delays the phase transformation from anatase to rutile. Moreover, at high temperature, a secondary phase (CoTiO₃) is found to coexist with highly crystalline rutile. These structural characteristics are discussed in relation with the observed general trends for the optical properties.
CC :	001B80A30F; 001D11C06; 240
FD :	Traitement thermique; Propriété physique; Dopage; Oxyde de titane; Procédé sol gel
ED :	Heat treatments; Physical properties; Doping; Titanium oxide; Sol-gel process
GD :	Dopen; Titanoxid
SD :	Doping; Titanio óxido
LO :	INIST-14386.354000501083080010
ID :	14-0022698

Links to Exploration step

Pascal:14-0022698

Le document en format XML

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<front><div type="abstract" xml:lang="en">Cobalt doped and undoped TiO<sub>2</sub>
 powders have been prepared by sol-gel technique and annealed at temperatures ranging from 400 °C to 1000 °C. The effects of annealing temperature on the structural, morphological and optical properties have been characterized by X-ray diffraction, transmission electron microscopy, electron energy-loss spectroscopy and diffuse reflectance spectroscopy. For all doped samples there is a general reduction of the band gap energy, in comparison with undoped samples prepared in the same conditions. More specifically, experimental results indicate that cobalt doping, occurring as Co<sup>2+</sup>
 ion insertion into the TiO<sub>2</sub>
 (Ti<sup>4+</sup>
) host lattice, inhibits the growth of the crystallites and delays the phase transformation from anatase to rutile. Moreover, at high temperature, a secondary phase (CoTiO<sub>3</sub>
) is found to coexist with highly crystalline rutile. These structural characteristics are discussed in relation with the observed general trends for the optical properties.</div>
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 ion insertion into the TiO<sub>2</sub>
 (Ti<sup>4+</sup>
) host lattice, inhibits the growth of the crystallites and delays the phase transformation from anatase to rutile. Moreover, at high temperature, a secondary phase (CoTiO<sub>3</sub>
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<server><NO>PASCAL 14-0022698 INIST</NO>
<ET>Heat treatment effect on the physical properties of cobalt doped TiO<sub>2 </sub>
sol-gel materials</ET>
<AU>SAMET (L.); BEN NASSEUR (J.); CHTOUROU (R.); MARCH (K.); STEPHAN (O.)</AU>
<AF>Institut Préparatoires aux Etudes d'Ingénieurs d'El-Manar, Université Tunis El Manar, Campus Universitaire/2092 El Manar/Tunisie (1 aut.); Laboratoire de Photovoltaique de Semi-conducteur et de Nanostructure, Centre de Recherches et des Technologies de l'Energie, Technopole borj cedria, Bp 95, hammamm lif 2050/Tunisie (1 aut., 2 aut., 3 aut.); Laboratoire de Physique des Solides, UMR 8502 CNRS - Université Paris-Sud, Bât 510/91405 Orsay/France (4 aut., 5 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Materials characterization; ISSN 1044-5803; Etats-Unis; Da. 2013; Vol. 85; Pp. 1-12; Bibl. 42 ref.</SO>
<LA>Anglais</LA>
<EA>Cobalt doped and undoped TiO<sub>2</sub>
 powders have been prepared by sol-gel technique and annealed at temperatures ranging from 400 °C to 1000 °C. The effects of annealing temperature on the structural, morphological and optical properties have been characterized by X-ray diffraction, transmission electron microscopy, electron energy-loss spectroscopy and diffuse reflectance spectroscopy. For all doped samples there is a general reduction of the band gap energy, in comparison with undoped samples prepared in the same conditions. More specifically, experimental results indicate that cobalt doping, occurring as Co<sup>2+</sup>
 ion insertion into the TiO<sub>2</sub>
 (Ti<sup>4+</sup>
) host lattice, inhibits the growth of the crystallites and delays the phase transformation from anatase to rutile. Moreover, at high temperature, a secondary phase (CoTiO<sub>3</sub>
) is found to coexist with highly crystalline rutile. These structural characteristics are discussed in relation with the observed general trends for the optical properties.</EA>
<CC>001B80A30F; 001D11C06; 240</CC>
<FD>Traitement thermique; Propriété physique; Dopage; Oxyde de titane; Procédé sol gel</FD>
<ED>Heat treatments; Physical properties; Doping; Titanium oxide; Sol-gel process</ED>
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	Serveur d'exploration sur le cobalt au Maghreb
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Serveur d'exploration sur le cobalt au Maghreb

Heat treatment effect on the physical properties of cobalt doped TiO2 sol-gel materials

Heat treatment effect on the physical properties of cobalt doped TiO2 sol-gel materials

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