Effect of varying ethanol and water compositions on the acetone sensing properties of WO3 for application in diabetes mellitus monitoring
Tungsten oxide based gas sensors have attracted a lot of attention in breath acetone analysis due to their potential in clinical diagnosis of diabetes. The major problem with this material in sensor application has been remarkable response to all gases but low selectivity to specific gases. Herein,...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ab7d58 |
| _version_ | 1827868829671227392 |
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| author | Valentine Saasa Yolandy Lemmer Thomas Malwela Amos Akande Mervyn Beukes Bonex Mwakikunga |
| author_facet | Valentine Saasa Yolandy Lemmer Thomas Malwela Amos Akande Mervyn Beukes Bonex Mwakikunga |
| author_sort | Valentine Saasa |
| collection | DOAJ |
| description | Tungsten oxide based gas sensors have attracted a lot of attention in breath acetone analysis due to their potential in clinical diagnosis of diabetes. The major problem with this material in sensor application has been remarkable response to all gases but low selectivity to specific gases. Herein, we report the gas sensing performance of WO _3 materials which were synthesized by varying water and ethanol ratios using a facile solvothermal method for acetone detection. The gas sensing properties of as-prepared WO _3 were tested on acetone C _7 H _8 , NO _2 , NH _3 , H _2 S and CH _4 under relative humidity. X-ray diffraction patterns show that as-prepared WO _3 samples are mainly composed of monoclinic WO _3 , a phase having relatively high selectivity to acetone. The as-prepared WO _3 sensors produced using 51:49 ratio of water: ethanol show an increase in acetone response as the acetone concentration increases and a decrease in acetone response as the relative humidity increases. The sensor responded to a very low acetone concentration ranging from 0.5 to 4.5 ppm which is normally found in human breath. Furthermore, the sensor exhibited high sensitivity and selectivity to low ppm of acetone at 100 °C. On contrary, the sensor showed significantly lower response to other gases tested. |
| first_indexed | 2024-03-12T15:36:58Z |
| format | Article |
| id | doaj.art-0fe485bacf004c759b5ef3d74d873f12 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:36:58Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-0fe485bacf004c759b5ef3d74d873f122023-08-09T16:08:49ZengIOP PublishingMaterials Research Express2053-15912020-01-017303590510.1088/2053-1591/ab7d58Effect of varying ethanol and water compositions on the acetone sensing properties of WO3 for application in diabetes mellitus monitoringValentine Saasa0https://orcid.org/0000-0001-7807-3435Yolandy Lemmer1Thomas Malwela2Amos Akande3https://orcid.org/0000-0002-3691-9233Mervyn Beukes4Bonex Mwakikunga5https://orcid.org/0000-0003-1307-5338DSI/CSIR-Centre for Nanostructures and Advanced Materials, PO Box 3951, South Africa; Department of Biochemistry, Genetics and Microbiology, University of Pretoria , Pretoria 0001, South AfricaCSIR-Next Generation Health, Pretoria, 0001, South AfricaDSI/CSIR-Centre for Nanostructures and Advanced Materials, PO Box 3951, South AfricaUniversity of Limpopo , Department of Physics, P/Bag X1106, Sovenga, 0727, South Africa; CSIR NextGen Enterprises and Institutions, Advanced Internet of Things, P O Box 395, Pretoria, 0001, South AfricaDepartment of Biochemistry, Stellenbosch University , Western Cape, South AfricaDSI/CSIR-Centre for Nanostructures and Advanced Materials, PO Box 3951, South Africa; Department of Physics, Tshwane University of Technology , PO Box 680, Pretoria 0001, South AfricaTungsten oxide based gas sensors have attracted a lot of attention in breath acetone analysis due to their potential in clinical diagnosis of diabetes. The major problem with this material in sensor application has been remarkable response to all gases but low selectivity to specific gases. Herein, we report the gas sensing performance of WO _3 materials which were synthesized by varying water and ethanol ratios using a facile solvothermal method for acetone detection. The gas sensing properties of as-prepared WO _3 were tested on acetone C _7 H _8 , NO _2 , NH _3 , H _2 S and CH _4 under relative humidity. X-ray diffraction patterns show that as-prepared WO _3 samples are mainly composed of monoclinic WO _3 , a phase having relatively high selectivity to acetone. The as-prepared WO _3 sensors produced using 51:49 ratio of water: ethanol show an increase in acetone response as the acetone concentration increases and a decrease in acetone response as the relative humidity increases. The sensor responded to a very low acetone concentration ranging from 0.5 to 4.5 ppm which is normally found in human breath. Furthermore, the sensor exhibited high sensitivity and selectivity to low ppm of acetone at 100 °C. On contrary, the sensor showed significantly lower response to other gases tested.https://doi.org/10.1088/2053-1591/ab7d58acetonegas sensortungsten trioxideselectivitysensitivity |
| spellingShingle | Valentine Saasa Yolandy Lemmer Thomas Malwela Amos Akande Mervyn Beukes Bonex Mwakikunga Effect of varying ethanol and water compositions on the acetone sensing properties of WO3 for application in diabetes mellitus monitoring Materials Research Express acetone gas sensor tungsten trioxide selectivity sensitivity |
| title | Effect of varying ethanol and water compositions on the acetone sensing properties of WO3 for application in diabetes mellitus monitoring |
| title_full | Effect of varying ethanol and water compositions on the acetone sensing properties of WO3 for application in diabetes mellitus monitoring |
| title_fullStr | Effect of varying ethanol and water compositions on the acetone sensing properties of WO3 for application in diabetes mellitus monitoring |
| title_full_unstemmed | Effect of varying ethanol and water compositions on the acetone sensing properties of WO3 for application in diabetes mellitus monitoring |
| title_short | Effect of varying ethanol and water compositions on the acetone sensing properties of WO3 for application in diabetes mellitus monitoring |
| title_sort | effect of varying ethanol and water compositions on the acetone sensing properties of wo3 for application in diabetes mellitus monitoring |
| topic | acetone gas sensor tungsten trioxide selectivity sensitivity |
| url | https://doi.org/10.1088/2053-1591/ab7d58 |
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