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Paper-based sensor for water-soluble gases detection

In this work, an inexpensive and environmentally friendly colorimetric paperbased sensor for rapid detection of water-soluble gases is fabricated. The detection principle is based on colour change upon exposure to water-soluble gases to anthocyanin-containing filter paper, which can be observed by t...

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Main Author: Chong, Esther Yee Xin
Format: Final Year Project / Dissertation / Thesis
Published: 2023
Subjects:
QC Physics
Online Access:http://eprints.utar.edu.my/5722/1/PH_1901960_FYP_Report_%2D_CHONG_YEE_XIN_ESTHER.pdf
http://eprints.utar.edu.my/5722/
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spelling my-utar-eprints.57222023-07-07T14:47:08Z Paper-based sensor for water-soluble gases detection Chong, Esther Yee Xin QC Physics In this work, an inexpensive and environmentally friendly colorimetric paperbased sensor for rapid detection of water-soluble gases is fabricated. The detection principle is based on colour change upon exposure to water-soluble gases to anthocyanin-containing filter paper, which can be observed by the naked eye. The paper-based sensor is fabricated from red cabbage powder, ethanol, deionized water, filter paper, and different concentrations of polyvinyl alcohol (PVA). The colour change of the sensor is characterised by a UVVisible Spectrophotometer (UV-Vis), a colorimeter, and an optical microchip sensor (SparkFun MAX30105). The paper-based sensor shows colour changes from reddish-purple to pink upon exposure to acidic gas (pH 0-1) and reddishpurple to green upon exposure to acidic gas (pH 11–13). The highest total colour change ΔE, peak shift, and recovery time are 65.8872, 55 nm, and 4.11 minutes, respectively, exhibited by a paper-based sensor with 20 mg/ml PVA when exposed to 15 ppm alkaline gas. The paper-based sensor also recovered its colour as it is exposed to ambient air. These results indicate that a paper-based sensor that contains 20 mg/ml PVA is a good indicator for water-soluble gases, and it is reusable. 2023 Final Year Project / Dissertation / Thesis NonPeerReviewed application/pdf http://eprints.utar.edu.my/5722/1/PH_1901960_FYP_Report_%2D_CHONG_YEE_XIN_ESTHER.pdf Chong, Esther Yee Xin (2023) Paper-based sensor for water-soluble gases detection. Final Year Project, UTAR. http://eprints.utar.edu.my/5722/
institution Universiti Tunku Abdul Rahman
building UTAR Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tunku Abdul Rahman
content_source UTAR Institutional Repository
url_provider http://eprints.utar.edu.my
topic QC Physics
spellingShingle QC Physics
Chong, Esther Yee Xin
Paper-based sensor for water-soluble gases detection
description In this work, an inexpensive and environmentally friendly colorimetric paperbased sensor for rapid detection of water-soluble gases is fabricated. The detection principle is based on colour change upon exposure to water-soluble gases to anthocyanin-containing filter paper, which can be observed by the naked eye. The paper-based sensor is fabricated from red cabbage powder, ethanol, deionized water, filter paper, and different concentrations of polyvinyl alcohol (PVA). The colour change of the sensor is characterised by a UVVisible Spectrophotometer (UV-Vis), a colorimeter, and an optical microchip sensor (SparkFun MAX30105). The paper-based sensor shows colour changes from reddish-purple to pink upon exposure to acidic gas (pH 0-1) and reddishpurple to green upon exposure to acidic gas (pH 11–13). The highest total colour change ΔE, peak shift, and recovery time are 65.8872, 55 nm, and 4.11 minutes, respectively, exhibited by a paper-based sensor with 20 mg/ml PVA when exposed to 15 ppm alkaline gas. The paper-based sensor also recovered its colour as it is exposed to ambient air. These results indicate that a paper-based sensor that contains 20 mg/ml PVA is a good indicator for water-soluble gases, and it is reusable.
format Final Year Project / Dissertation / Thesis
author Chong, Esther Yee Xin
author_facet Chong, Esther Yee Xin
author_sort Chong, Esther Yee Xin
title Paper-based sensor for water-soluble gases detection
title_short Paper-based sensor for water-soluble gases detection
title_full Paper-based sensor for water-soluble gases detection
title_fullStr Paper-based sensor for water-soluble gases detection
title_full_unstemmed Paper-based sensor for water-soluble gases detection
title_sort paper-based sensor for water-soluble gases detection
publishDate 2023
url http://eprints.utar.edu.my/5722/1/PH_1901960_FYP_Report_%2D_CHONG_YEE_XIN_ESTHER.pdf
http://eprints.utar.edu.my/5722/
_version_ 1772816676808556544
score 13.244413

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