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Sensors 2010, 10(11), 10226-10239; doi:10.3390/s10111022

Fabrication and Performance of All-Solid-State Chloride Sensors in Synthetic Concrete Pore Solutions

School of Civil Engineering, Harbin Institute of Technology, Harbin 150006, China
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Received: 13 October 2010 / Revised: 4 November 2010 / Accepted: 8 November 2010 / Published: 16 November 2010
(This article belongs to the Section Chemical Sensors)
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Abstract

One type of all-solid-state chloride sensor was fabricated using a MnO2 electrode and a Ag/AgCl electrode. The potentiometric response of the sensor to chloride in synthetic concrete pore solutions was systematically studied, and the polarization performance was also evaluated. The results show a good linear relationship between the potential reading of the sensor and the logarithm of chloride activity (concentration ranges from 0.05 to 5.0 M), and the potential value remains stable with increasing immersion time. The existence of K+, Ca2+, Na+ and SO42− ions have little influence on the potentiometric response of the sensor to chloride, but the pH has a significant influence on the potential value of the sensor at low chloride concentration. The potential reading of the sensor increases linearly with the solution temperature over the range from 5 to 45 °C. Meanwhile, an excellent polarization behavior is proven by galvanostatic and potentiodynamic tests. All of the results reveal that the developed sensor has a great potential for monitoring chloride ions in concrete environments. View Full-Text
Keywords: chloride sensor; all-solid-state; fabrication; potentiometric response; synthetic concrete pore solutions chloride sensor; all-solid-state; fabrication; potentiometric response; synthetic concrete pore solutions
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Gao, X.; Zhang, J.; Yang, Y.; Deng, H. Fabrication and Performance of All-Solid-State Chloride Sensors in Synthetic Concrete Pore Solutions. Sensors 2010, 10, 10226-10239.

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