Influence of aluminium concentration in Zn0:9V0:1O nanoparticles on structural and optical properties

• Autorzy: Sayari A. , El-Mir L. , Al-Heniti S. , Al-Harbi T. , Yaghmour S. J. , Al-Ghamdi A. A.

Identyfikatory

DOI

10.1515/msp-2015-0013

• Języki publikacji: EN

Abstrakty

EN

The (V,Al) co-doped ZnO nano-structured powders (Zn_0.9V_0.1Al_xO, where x = 0.02, 0.03 and 0.04) were synthesized via the sol-gel technique and their structural and optical properties were investigated. The effect of Al concentration on the structural and optical properties of the Zn_0.9-xV_0.1Al_xO nanopowders was studied using various techniques. The XRD patterns indicate that the samples have a polycrystalline wurtzite structure. The crystallite size increases with increasing the Al content and lies in the range of 23 to 30 nm. The lattice strain, estimated by the Stokes-Wilson equation, decreases when Al content increases. SEM and TEM micrographs show that Zn_0.9-xV_0.1Al_xO powders are the agglomeration of nanoparticles having spherical and hexagonal shapes with dimensions ranging from 20 to 30 nm. FT-IR spectra show a distinct absorption peak at about 500 cm^-1 for ZnO stretching modes and other peaks related to OH and H2O bands. Raman spectra confirm the wurtzite structure of the Zn_0.9-xV_0.1Al_xO nanoparticles. The direct band gaps of the synthesized Zn_0.9-xV_0.1Al_xO nanopowders, estimated from the Brus equation and the crystallite sizes deduced from XRD, are around 3.308 eV. The decomposition process of the dried gel system was investigated by thermal gravimetric analysis (TGA).

Słowa kluczowe

EN

ZnO; nanopowder; V and Al co-doping; XRD; TEM; Raman scattering

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2015
• Tom: Vol. 33, No. 1
• Strony: 198--204
• Opis fizyczny: Bibliogr. 30 poz., rys., tab.

Twórcy

autor

Sayari A.

• Department of Physics, Faculty of Science, King Abdulaziz University , North Jeddah Branch, P.O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia
• Equipe de Spectroscopie Raman, D´epartement de Physique, Facult´e des Sciences de Tunis, Campus Universitaire, El-Manar, 2092 Tunis, Tunisie

autor

El-Mir L.

• Al Imam Mohammad Ibn Saud Islamic University (IMSIU), College of Sciences, Department of Physics, Riyadh 11623, Saudi Arabia
• Laboratoire de Physique des Mat´eriaux et des Nanomat´eriaux appliqu´ee `a l’Environnement, Facult´e des Sciences de Gab`es, Cit´e Erriadh Manara Zrig, 6072 Gab`es, Tunisia

autor

Al-Heniti S.

• Department of Physics, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia

autor

Al-Harbi T.

• 5Department of Physics, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia

autor

Yaghmour S. J.

• Department of Physics, Faculty of Science, King Abdulaziz University , North Jeddah Branch, P.O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia

autor

Al-Ghamdi A. A.

• Department of Physics, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia

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