Abstract
Acetone is a well-known volatile organic compound that is widely used in different industrial and domestic areas. However, it can have dangerous effects on human life and health. Thus, the realization of sensitive and selective sensors for recognition of acetone is highly important. Among different gas sensors, resistive gas sensors based on nanostructured metal oxide with high surface area, have been widely reported for successful detection of acetone gas, owing to their high sensitivity, fast dynamics, high stability, and low price. Herein, we discuss different aspects of metal oxide-based acetone gas sensors in pristine, composite, doped, and noble metal functionalized forms. Gas sensing mechanisms are also discussed. This review is an informative document for those who are working in the field of gas sensors.
Highlights
As a general rule, chemical compounds containing at least one carbon (C) and one hydrogen (H)atoms in their molecular structure are called organic compounds [1]
Chemical compounds containing at least one carbon (C) and one hydrogen (H). Atoms in their molecular structure are called organic compounds [1]. They are referred as volatile organic compounds (VOCs) when they turn volatile at ambient temperature [2]
The results demonstrate the potential application of PPy-WO3 hybrid sensor for noninvasive detection of acetone in breath [141]
Summary
Chemical compounds containing at least one carbon (C) and one hydrogen (H). Atoms in their molecular structure are called organic compounds [1]. Acetone (see the molecular structure in Figure 1) has a molecular weight of 58.08 g/mole, density of 0.79 g/cm at 20 ◦ C, and an intense odor, and it is an extensively used solvent in industry and is found in many common domestic commodities. It can be inhaled, resulting in serious effects on human health [4]. Acetone concentrations higher than 173 ppm can severely affect the central nervous system and damage important organs of the body [5].
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