NDLI: Development of a low cost Hemin based dissolved oxygen sensor with anti-biofouling coating for water monitoring

Content Provider	IEEE Xplore Digital Library
Author	Hsu, L.H.-H. Selvaganapathy, P.R.
Copyright Year	2013
Description	Author affiliation: Dept. of Mech. Eng., McMaster Univ., Hamilton, ON, Canada (Selvaganapathy, P.R.) \|\| Sch. of Biomed. Eng., McMaster Univ., Hamilton, ON, Canada (Hsu, L.H.-H.)
Abstract	Conventional electrochemical dissolved oxygen (DO) sensors are expensive as they use Platinum in their construction. In addition, these sensors bio-foul when used in natural or wastewater, which leads to reduced sensitivity and variable performance. Here, we address these problems by i) replacing Platinum with Hemin as a low cost alternative for electrocatalysing the oxygen reduction reaction and ii) using silicone rubber (PDMS) functionalized with polyethyleneglycol (PEG) as the anti biofouling gas permeable membrane to provide selectivity with an increased lifetime. Our DO sensor has a sensitivity of 20.7 $(μA/cm^{2})/(mg/L)$ over a DO concentration range of 7-2 mg/L. Also, the common interferences such as phosphate and nitrate show minor influence in DO detection. Furthermore, the PEG grafting PDMS membranes protects the sensor from biofouling for 20 days in accelerated bio-fouling condition, while the unfunctionalized sensor loses its sensitivity in less than one day.
Starting Page	1
Ending Page	4
File Size	817465
Page Count	4
File Format	PDF
ISBN	9781467346429
ISSN	19300395
DOI	10.1109/ICSENS.2013.6688588
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-11-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Sensors Sensitivity Biomembranes Surface treatment Silver Electric potential
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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