Abstract

MARTINEZ-PACHECO, Claudio; ANGEL-MERAZ, Ebelia Del  and  DIAZ-FLORES, Laura Lorena. The ZnO nanostructures and their applications as a H₂S gas sensor. CienciaUAT [online]. 2023, vol.17, n.2, pp.24-36.  Epub June 26, 2023. ISSN 2007-7858.  https://doi.org/10.29059/cienciauat.v17i2.1632.

There is a global interest in the detection of toxic gases for the protection of the environment and human beings, using low-cost and easy-to-use sensors. Multiple studies have focused on the use of gas detectors based on metal oxides, such as zinc oxide (ZnO), which has specific electronic properties as a gas detector because it is an n-type semiconductor and it has a low production cost. The objective of this work was to analyze the use of ZnO nanostructures for the manufacturing of hydrogen sulfide (H2S) gas sensors, as well as the most common techniques for obtaining these structures. The characteristics of zinc oxide nanostructures (NE´s-ZnO) vary due to the effect of the obtaining method, generating different morphologies and sizes, which impacts gas detection performance (0.5 ppm up to 600 ppm) and in the temperature range that is required. Advances in the design of various NE’s-ZnO will have the possibility of generating sensors that can be used in portable detectors and operate at room temperature, which is a current challenge.

Keywords : portable detectors; sensor; toxic gases; nanoparticles.

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