Portable gas detector. Credit: Shutterstock
A Russian-Belarusian research team has developed a new tungsten oxide-based gas detection material that shows high sensitivity to carbon monoxide, nitrogen dioxide and acetone. The gas detection response of the new material was nine times higher than that of the existing sensors. The study was published in Nano-structures and nano-objects.
Indoor air quality control and the detection of toxic gases and volatile organic compounds are important for improving living and working conditions, and are needed in a variety of industrial, agricultural, and environmental applications. This requires the development of special gas detection materials with a high detection response to a variety of gases of different chemical natures.
Scientists from NUST MISIS, the State University of Belarus and the AV Luikov Institute for Heat and Mass Transfer of the National Academy of Sciences of Belarus have synthesized a new nanocomposite material that shows a high sensitivity to different types of toxic gases in a wide variety of concentrations. It was obtained from graphene-modified tungsten oxide nanopoles and a copper nanocomposite.
Tungsten oxide was obtained by a sol-gel method also known as chemical solution deposition. Graphene and copper nanopoles, obtained by the combustion method of the solution, were then added to the precursor gel to achieve a tightly interconnected structure.
“The gas detection properties of the material were then studied with carbon monoxide, nitrogen dioxide and acetone used as test gases. Tests have shown that the introduction of 1% by weight of modifier leads to an increase of nine times the sensitivity of the material to carbon dioxide and a six-fold increase in its sensitivity to acetone The highest detection response to acetone was obtained for the 2% by weight samples “Dmitry Moskovskih, head of the NUST MISIS Research Center for the Engineering of Ceramic Nanomaterials,” said Dmitry Moskovskih.
The researchers believe that the nanocomposites obtained have a great potential for practical application in commercial sensors of highly sensitive gases due to the simplicity of the proposed synthesis approach.
Scientists are synthesizing new, ultra-hard material. More information: Yulyan Haiduk et al, WO3 – graphene – Cu nanocomposites for CO, NO2 and acetone gas sensors, Nano-structures and nano-objects (2021). DOI: 10.1016 / j.nanoso.2021.100824 Provided by the National University of Science and Technology MISIS
Citation: Scientists make toxic gas detection nine times more effective (2022, May 27) recovered on May 27, 2022
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