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Using the interfacial barrier effects of p–n junction on electrochemistry for detection of phosphate

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Abstract

A novel type of electrochemical sensor for detection of phosphate in water environment was developed by combining the interfacial barrier of p–n junction with the adsorption of phosphate. The electrochemical response was produced by the induced change of the barrier height, which was only caused by the specific adsorption of phosphate. Two linear concentration ranges (0–0.045 mg L−1 and 0.045–0.090 mg L−1) with two sensitivities (4.98 μA (μg L−1)−1 and 1.28 μA (μg L−1)−1) were found. The good performance made the sensor meet the requirements of the World Health Organization for drinking water (1 mg L−1 of phosphate). It is an approach to develop electrochemical sensors by employing the interfacial barrier effects on electrochemistry.

Graphical abstract: Using the interfacial barrier effects of p–n junction on electrochemistry for detection of phosphate

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Article information


Submitted
20 Dec 2019
Accepted
16 Mar 2020
First published
16 Mar 2020

Analyst, 2020, Advance Article
Article type
Communication

Using the interfacial barrier effects of p–n junction on electrochemistry for detection of phosphate

Y. Ding, M. Zhao, J. Yu, X. Zhang, Z. Li and H. Li, Analyst, 2020, Advance Article , DOI: 10.1039/C9AN02579K

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