Nanomaterials as Sensor for Hazardous Gas Detection
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Gases that are harmful to humans in definite concentrations are termed as hazardous gases. These gases have adverse effect on living organisms and on the environment. Sometimes the presence of hazardous gas leads to fire accident, causes health problem, and even causes death. Monitoring of these gases has become a key issue. Although the presence of some of the hazardous gases can be detected by their foul odor, the presence of these gases in a confined area in a scientific way by using electronic devices and technologies helps us in avoiding accident and saves life. A gas detector device identifies the presence of a particular gas and may sound an alarm so that the concerned persons can take step against the leakages and get opportunity to leave the place if required. In the industrial age, the first gas detector was invented by Sir Humphry Davy (Davy’s lamp) in order to detect methane gas in the coal mines. Later on several devices have been developed by different workers to detect the various harmful gases. The present chapter provides information on different nanomaterial-based sensors for the detection of hazardous gases.
KeywordsGas sensor Semiconducting materials Metal oxide CNTs
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