Influence of Al doping on the structural, morphological, optical, and gas sensing properties of ZnO nanorods

被引：185

作者：

Ganesh, R. Sankar ^{[1
,2
]}

Navaneethan, M. ^{[3
]}

Mani, Ganesh Kumar ^{[4
]}

Ponnusamy, S. ^{[2
]}

Tsuchiya, K. ^{[4
]}

Muthamizhchelvan, C. ^{[2
]}

Kawasaki, S. ^{[5
]}

Hayakawa, Y. ^{[1
,3
]}

机构：

[1] Shizuoka Univ, Grad Sch Sci & Technol, Naka Ku, 3-5-1 Johoku, Hamamatsu, Shizuoka 4328011, Japan

[2] SRM Univ, Dept Phys & Nanotechnol, Kancheepuram 603203, Tamil Nadu, India

[3] Shizuoka Univ, Elect Res Inst, Naka Ku, 3-5-1 Johoku, Hamamatsu, Shizuoka 4328011, Japan

[4] Tokai Univ, Micro Nano Technol Ctr, Dept Precis Engn, Shonan Campus Hiratsuka, Hiratsuka, Kanagawa 2591292, Japan

[5] Nagoya Inst Technol, Dept Mat Sci & Engn, Showa Ku, Gokiso Ku, Nagoya, Aichi 4668555, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 698卷

关键词：

Ammonia; ZnO; Al doping; Gas sensor; Nanostructured materials; DOPED ZNO; THIN-FILMS; ROOM-TEMPERATURE; SPRAY-PYROLYSIS; AMMONIA SENSOR; NANOSTRUCTURES; NANOPARTICLES; SENSITIVITY; CO;

D O I：

10.1016/j.jallcom.2016.12.187

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ammonia is one of the most hazardous substance and highly toxic to human health when inhaled above the moderate level. Sensing ammonia is one most challenging task at low temperature level and room temperature. ZnO and Al-doped ZnO nanostructures were successfully synthesized by solegel method, and their structural, optical, morphological, and gas sensing properties were investigated. Field-emission scanning electron microscopy revealed that the ZnO nanorods transformed into particles upon incorporation of Al. Transmission electron microscopy and high-resolution transmission electron microscopy confirmed that both the ZnO nanorods and Al-doped ZnO nanoparticles were crystalline. Fourier transform infrared spectroscopy analysis indicated the presence of Zn-O and Al-O in the nanostructures. Energy-dispersive X-ray spectroscopy revealed the presence of Al in the Al-doped ZnO materials. The ammonia gas sensing analysis revealed that the Al-doped ZnO nanoparticles displayed a higher response than the ZnO nanorods. Moreover, among the doped samples, that containing 6 wt% Al dopant exhibited the highest response of 350 when exposed to 100 ppm ammonia gas. The higher sensing efficiency of the Al-doped ZnO nanostructures was attributed to changes in structural defects in Al-doped ZnO, as confirmed by X-ray photoelectron spectroscopy analysis. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：555 / 564

页数：10

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