Issue 100, 2015

Highly stable low temperature alcohol sensor based on hydrothermally grown tetragonal titania nanorods

Abstract

Highly stable, low temperature (27–175 °C) alcohol (ethanol, methanol and 2-propanol) sensing performance of a hydrothermally grown tetragonal TiO2 nanorod array, targeting the detection level of 1–100 ppm, is reported in this paper. Synthesized titania nanorods were characterized by X-ray diffraction, energy dispersive spectroscopy (EDS) and field emission scanning electron microscopy (FESEM) to investigate the crystallinity, chemical compositions and surface morphology, respectively. Photoluminescence spectroscopy (PL spectra) was employed to find out the surface oxygen vacancies and band gap of the material. An alcohol sensing study, in resistive mode, was carried out and the optimum temperature for alcohol sensing was found to be 75 °C with the corresponding maximum response magnitude of ∼69%, ∼75% and ∼80% towards 100 ppm ethanol, methanol and 2-propanol, with corresponding response time/recovery time of ∼13 s/24 s, ∼11/21 s and ∼9/18 s, respectively. The sensor also offered efficient detection (response magnitude of 29%, 37% and 40%) of 1 ppm alcohol(s) with fast response time and recovery time of ∼12–14 s and ∼4–5 s, respectively. The minimal cross sensitivity, with other interfering species like acetone, benzene, xylene and 2-butanone, and appreciable long term stability showed the potential of the developed sensor for commercial applications.

Graphical abstract: Highly stable low temperature alcohol sensor based on hydrothermally grown tetragonal titania nanorods

Article information

Article type
Paper
Submitted
22 Jul 2015
Accepted
21 Sep 2015
First published
28 Sep 2015

RSC Adv., 2015,5, 82159-82168

Highly stable low temperature alcohol sensor based on hydrothermally grown tetragonal titania nanorods

B. Bhowmik and P. Bhattacharyya, RSC Adv., 2015, 5, 82159 DOI: 10.1039/C5RA14518J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements