A novel methane sensor based on porous SnO₂nanorods: room temperature to high temperature detection

Abstract

We report for the first time a novel room temperature methane (CH(4)) sensor fabricated using porous tin oxide (SnO(2)) nanorods as the sensing material. The porous SnO(2) nanorods were synthesized by using multiwall carbon nanotubes (MWCNTs) as templates. Current versus time curves were obtained demonstrating the room temperature sensing capabilities of the sensor system when exposed to 0.25% CH(4) in air. The sensor also exhibited a wide temperature range for different concentrations of CH(4) (25-500 °C), making it useful in harsh environments as well.

Influence of in-plane and bridging oxygen vacancies of SnO2 nanostructures on CH4 sensing at low operating temperatures

“…Recently, porous SnO 2 nanostructures responded even at room temperature (RT) against 1000 ppm CH 4 gas. 7 However, the mechanism of detection is not well understood.…”

Hydrothermal synthesis of K2W4O13 nanowire with high H2S gas sensitivity

“…However, the need for highly selective, low-concentration detection has driven the research for high-performance materials. During the past decade, nanostructured materials of various morphologies such as nanowire, nanorod, nanobelt, nanoflower and hollow sphere have been investigated for gas-sensing performance [2][3][4][5][6]. The studies revealed that gas-sensing performance can be enhanced when the sensing material is in the form of nanostructure.…”

Assessing a low-cost methane sensor quantification system for use in complex rural and urban environments

“…While many projects utilize sensors capable of detecting criteria pollutants, advances in the development of metal-oxide semiconductor (MOx) sensors have led to sensors capable of detecting methane in settings closer to ambient environmental conditions (Quaranta et al, 1999;Biaggi-Labiosa, 2012). Eugster and Kling (2012) demonstrated the ability of the Figaro 30 TGS 2600 sensor to resolve diurnal methane fluctuations in a remote area of Alaska.…”