Issue 2, 2016

Chemiresistive gas sensor for the sensitive detection of nitrogen dioxide based on nitrogen doped graphene nanosheets

Abstract

In this paper, we report on the development of a chemiresistive sensor for the detection of nitrogen dioxide (NO2) gas at room temperature using nitrogen-doped graphene nanosheets (NGS). The substitution of the nitrogen atoms in the honey-comb structure of graphene enhances the adsorption sites for gas molecules and thereby the sensitivity of the detection of the adsorbed gas molecules increases. Graphene nanosheets (GS) and NGS were prepared by hydrothermal treatment of graphene oxide in the absence and presence of nitrogen precursor respectively. The sensing materials were characterized by FESEM, TEM, XRD, XPS and elemental analysis. The nitrogen content in as-prepared NGS is at around 10%. The thin films of GS and NGS on pre-patterned gold interdigitated electrodes (IDEs) were obtained by the drop-drying method. The NGS coated sensor showed good response for sensing NO2 in comparison to that of GS at room temperature. The recovery of the sensor was greatly accelerated by ultra-violet light illumination. The proposed sensor showed excellent characteristics such as a low detection limit of 120 ppb (at S/N = 3). The effect of humidity on sensor performance was also studied. The proposed sensor also showed excellent selectivity with respect to various common interfering gases.

Graphical abstract: Chemiresistive gas sensor for the sensitive detection of nitrogen dioxide based on nitrogen doped graphene nanosheets

Article information

Article type
Paper
Submitted
29 ذو الحجة 1436
Accepted
19 صفر 1437
First published
21 صفر 1437

RSC Adv., 2016,6, 1527-1534

Chemiresistive gas sensor for the sensitive detection of nitrogen dioxide based on nitrogen doped graphene nanosheets

M. Shaik, V. K. Rao, M. Gupta, K. S. R. C. Murthy and R. Jain, RSC Adv., 2016, 6, 1527 DOI: 10.1039/C5RA21184K

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