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Sensors 2018, 18(3), 716; https://doi.org/10.3390/s18030716

Electrochemical Hydrogen Peroxide Sensor Based on Macroporous Silicon

1
School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Malaysia
2
School of Physics, Universiti Sains Malaysia (USM), Penang 11800, Malaysia
*
Authors to whom correspondence should be addressed.
Received: 10 December 2017 / Revised: 7 February 2018 / Accepted: 14 February 2018 / Published: 28 February 2018
(This article belongs to the Section Chemical Sensors)
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Abstract

Macroporous silicon was prepared through an anodization process; the prepared samples showed an average pore size ranging from 4 to 6 microns, and the depth of the pores in the silicon wafer was approximately 80 microns. The prepared samples were tested for hydrogen peroxide (H2O2) concentrations, which can be used for industrial and environmental sensing applications. The selected H2O2 concentration covered a wide range from 10 to 5000 μM. The tested samples showed a linear response through the tested H2O2 concentrations with a sensitivity of 0.55 μA μM–1∙cm–2 and lower detection limits of 4.35 μM at an operating voltage of 5 V. Furthermore, the electrode exhibited a rapid response with a response time of ca. two seconds. Furthermore, the prepared sensor showed a reasonable stability over a one-month time period. View Full-Text
Keywords: macroporous silicon; hydrogen peroxide; electrochemical sensors; amperometric sensors macroporous silicon; hydrogen peroxide; electrochemical sensors; amperometric sensors
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Al-Hardan, N.H.; Abdul Hamid, M.A.; Shamsudin, R.; AL-Khalqi, E.M.; Kar Keng, L.; Ahmed, N.M. Electrochemical Hydrogen Peroxide Sensor Based on Macroporous Silicon. Sensors 2018, 18, 716.

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