Methane Gas Sensors Based on Nano Structure Materials

Dr Mohammad Hossein Sheikhi
Department of Electrical Engineering
Shiraz  University
Shiraz, Iran

Methane is a colorless and odorless gas, whose detection importance originates from different reasons, from air pollution control to medical diagnostic tests. Personnel safety in some working environments is the most important application of methane detection in many industries as methane can cause suffocation and explosion. Investigating methods to improve sensing properties of methane sensors to fabricate more sensitive, faster and more stable sensors which can operate at lower temperatures is of great interest and importance nowadays.

Three of recent researches on novel methods of fabricating high performance solid-state methane gas sensors held on at our research group will be presented. One of them investigates the effect of SWCNT addition to SnO2 as the semiconducting sensing material. Another one introduces a chemical method to fabricate a low power, highly sensitive methane sensor based on reduced Graphene Oxide (rGO) nanocomposites which is known to cost lower than physical methods. And the last one is about the introduction of a thin film room temperature methane gas sensor based on lead sulfide CQDs for the first time.