Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 27, Issue 4, Pages 3109-3144Publisher
SPRINGER
DOI: 10.1007/s10854-015-4200-z
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Funding
- Iran Nanotechnology Initiative Council
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Interest in detecting and determining concentrations of toxic and flammable gases has constantly been on the increase in recent years due to increase of modernization, industrialization and high standards of life. Detection of such gases is very important in many different fields such as industrial emission control, household and social security, vehicle emission control and environmental monitoring. Metal oxide gas sensors are among most important devices to detect a large variety of gases. alpha-Fe2O3, an environmental friendly semiconductor (E (g) = 2.1 eV), is the most stable iron oxide under ambient atmosphere and because of its low cost, high stability, high resistance to corrosion, and its environmentally friendly properties is one of the most important metal oxides for gas sensing applications. This is the first review about gas sensing properties of alpha-Fe2O3 nanostructures. In this paper gas sensing properties of alpha-Fe2O3 are extensively reviewed. After a brief explanation about metal oxide gas sensors and alpha-Fe2O3, sensors based on alpha-Fe2O3 nanomaterials have been reviewed. Gas sensing section is divided into five subsections: pure alpha-Fe2O3 gas sensors, metal/alpha-Fe2O3 gas sensors, metal oxide/alpha-Fe2O3 gas sensors, polymer/alpha-Fe2O3 gas sensors and graphene/alpha-Fe2O3 gas sensors.
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