Ammonia sensing properties of V-doped ZnO:Ca nanopowders prepared by sol-gel synthesis

被引：22

作者：

Fazio, E. ^{[1
]}

Hjiri, M. ^{[2
,3
]}

Dhahri, R. ^{[2
,3
]}

El Mir, L. ^{[2
,4
]}

Sabatino, G. ^{[1
]}

Barreca, F. ^{[1
]}

Neri, F. ^{[1
]}

Leonardi, S. G. ^{[3
]}

Pistone, A. ^{[3
]}

Neri, G. ^{[3
]}

机构：

[1] Univ Messina, Dipartimento Fis & Sci Terra, I-98166 Messina, Italy

[2] Fac Sci Gabes, Lab Phys Mat & Nanomat Appl Environm, Gabes 6072, Tunisia

[3] Univ Messina, Dipartimento Ingn Elettron Chim & Ingn Ind, I-98166 Messina, Italy

[4] Al Imam Mohammad Ibn Saud Islamic Univ IMSIU, Coll Sci, Dept Phys, Riyadh 11623, Saudi Arabia

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2015年 / 226卷

关键词：

Sol-gel; V-doped ZnO:Ca; NH3; sensor; RAY PHOTOELECTRON-SPECTROSCOPY; THIN-FILM; OPTICAL-PROPERTIES; LASER-ABLATION; OXIDE; SENSORS; RAMAN; AL; CO; MECHANISM;

D O I：

10.1016/j.jssc.2015.02.021

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

V-doped ZnO:Ca nanopowders with different V loading were prepared by sol-gel synthesis and successive drying in ethanol under supercritical conditions. Characterization data of nanopowders annealed at 700 degrees C in air, revealed that they have the wurtzite structure. Raman features of V-doped ZnO:Ca samples were found to be substantially modified with respect to pure ZnO or binary ZnO:Ca samples, which indicate the substitution of vanadium ions in the ZnO lattice. The ammonia sensing properties of V-doped ZnO:Ca thick films were also investigated. The results obtained demonstrate the possibility of a fine tuning of the sensing characteristics of ZnO-based sensors by Ca and V doping. In particular, their combined effect has brought to an enhanced response towards NH3 compared to bare ZnO and binary V-ZnO and Ca-ZnO samples. Raman investigation suggested that the presence of Ca play a key role in enhancing the sensor response in these ternary composite nanomaterials. (C) 2015 Elsevier Inc. All rights reserved.

引用

页码：192 / 200

页数：9

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