Issue 4, 2012

Enhanced ethanol sensing properties of NiO-doped SnO2 polyhedra

Abstract

A novel sensing material of NiO-doped SnO2 polyhedra was prepared and characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray (EDX) spectroscopy and transmission electron microscopy (TEM). Gas sensing properties of the sensor fabricated from the as-prepared NiO-doped SnO2 were systematically investigated and compared with those of pure SnO2. The NiO-doped SnO2 sensor exhibits a response of 6.7 to 30 ppm ethanol at 280 °C with the response and recovery times shorter than 0.6 and 10 s, respectively, which are much better than pure SnO2. The enhanced sensing performances to ethanol are mainly attributed to the formation of p–n heterojunctions between p-type NiO and n-type SnO2 and the increased alkalinity of SnO2 by NiO doping.

Graphical abstract: Enhanced ethanol sensing properties of NiO-doped SnO2 polyhedra

Article information

Article type
Paper
Submitted
12 Dec 2011
Accepted
11 Jan 2012
First published
08 Feb 2012

New J. Chem., 2012,36, 1003-1007

Enhanced ethanol sensing properties of NiO-doped SnO2 polyhedra

Z. Lou, L. Wang, T. Fei and T. Zhang, New J. Chem., 2012, 36, 1003 DOI: 10.1039/C2NJ21030D

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