Fabrication of ZnO nanoparticles based sensitive methanol sensor and efficient photocatalyst

被引：121

作者：

Faisal, M. ^{[1
,2
]}

Khan, Sher Bahadar ^{[3
,4
]}

Rahman, Mohammed M. ^{[3
,4
]}

Jamal, Aslam ^{[1
,2
]}

Abdullah, M. M. ^{[1
,2
]}

机构：

[1] Najran Univ, Fac Sci & Arts, CAMNE, Najran 11001, Saudi Arabia

[2] Najran Univ, Fac Sci & Arts, Dept Chem, Najran 11001, Saudi Arabia

[3] King Abdulaziz Univ, CEAMR, Jeddah 21589, Saudi Arabia

[4] King Abdulaziz Univ, Fac Sci, Dept Chem, Jeddah 21589, Saudi Arabia

来源：

APPLIED SURFACE SCIENCE | 2012年 / 258卷 / 19期

关键词：

ZnO nanoparticles; Hydrothermal synthesis; Methanol chemical sensor; Photocatalyst; Methylene Blue; CHEMICAL SENSOR; THIN-FILM; GAS SENSOR; OPTICAL-PROPERTIES; PHOTO-CATALYST; DEGRADATION; MECHANISM; OXIDATION; PHOTODEGRADATION; GROWTH;

D O I：

10.1016/j.apsusc.2012.04.075

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：

ZnO nanoparticles (NPs) were prepared by hydrothermal treatment with starting materials (zinc chloride and urea) in the presence of ammonium hydroxide and characterized by powder X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and UV-vis spectroscopy. The synthesized nanoparticles are crystalline with wurtzite hexagonal phase having average particle size in the range of 80-130 nm. Photocatalytic activity of the prepared ZnO NPs was evaluated by the degradation of methylene blue and almost complete degradation (91.0%) takes place within 85 min of irradiation time. Prepared ZnO nanostructures possessed high photocatalytic activity when compared with TiO2-UV100. Additionally, the sensing properties of the ZnO films were investigated for various concentrations of methanol in liquid phase by simple I-V technique at room conditions. It was observed that ZnO thin film exhibits good sensitivity (0.9554 mu Acm(-2)mM(-1)) towards detection of methanol at room conditions. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：7515 / 7522

页数：8

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