Recent advances in silver nanoparticle-based electrochemical sensors for determining organic pollutants in water: a review
Water pollutants have attracted great attention because of their negative effect on human health. Accordingly, various analytical techniques have been investigated to detect water pollutants as a preliminary step for their control. This review highlights silver nanoparticles (AgNPs) as promising ele...
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| Published in: | Materials advances Vol. 2; no. 22; pp. 735 - 7365 |
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| Main Authors: | , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
15-11-2021
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| Online Access: | Get full text |
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| Summary: | Water pollutants have attracted great attention because of their negative effect on human health. Accordingly, various analytical techniques have been investigated to detect water pollutants as a preliminary step for their control. This review highlights silver nanoparticles (AgNPs) as promising electrochemical probes studied for detecting organic pollutants. Electrochemical sensors can be fabricated by modifying electrode surfaces using AgNPs
via
different techniques, such as electrochemical deposition, drop casting, spin coating, sticking, and transfer sticking, as well as carbon paste-based modification. AgNPs at electrode surfaces can be identified by their stripping to form Ag
+
with a particular oxidation peak. Additionally, they can be detected indirectly by catalyzing electrochemical reactions. AgNP-modified electrodes are known for their increased surface area and superior conductivity compared with unmodified electrodes. They can detect various inorganic and organic analytes on the basis of the electrochemical responses of the AgNPs or the analyte. The mechanisms of AgNP-modifier-based electrochemical sensors (including AgNPs aggregation, displacement, inhibition, and amplification) and analyte-based electrochemical sensors (including oxidation and reduction) have been highlighted as efficient tools for detecting organic pollutants. Overall, AgNP-based electrochemical sensors are considered a promising tool for determining various organic pollutants in water.
Silver nanoparticles as promising electrochemical probes have been studied for detecting pesticides, drugs, organic dyes, mycotoxins, and explosives in water based on the electrochemical responses of the silver nanoparticles and the pollutant. |
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| Bibliography: | Magdi Abdel Azzem received his BSc (1976) and MSc (1980) degrees from Cairo University and his PhD (1984) degree in chemistry from Cairo University and Joseph Fourier University, Grenoble, France (through the scientific channel system). Since 1995, he has been a professor of electrochemistry in the chemistry department, faculty of science, Menoufia University, Egypt. He was the Chairman of the Chemistry Department (2006-2009) and the Vice Dean for Community and Environmental Development (1998-2001). He was awarded the Prize of the State for the Encouragement (1996) and the Excellence award from Menoufia University (2016). His main fields of research interest are modified electrodes, sensors, and fuel cells. Magdy Abdel Hamid Zahran received his BSc (1974) and MSc (1980) degrees from Ain Shams University and his PhD (1986) degree in chemistry from the Mathematics-Natural Scientific Faculty of Rhenish-Friedrich-Wilhelm University, Bonn, West Germany. Since 1999, he has been a professor of organic chemistry in the chemistry department, Faculty of Science, Menoufia University, Egypt. He held several postdoctoral research fellowships at Odense University, Denmark and Bonn University, West Germany. His main field of research interest is the development of cancer drugs. Moreover, he is a consultant for many industrial factories in the industrial cities in Egypt. Moustafa Zahran earned his Bachelor's degree in chemistry (2012) and his Master's degree in organic chemistry (2016) from El-Menoufia University, Shebin El-Kom, Egypt. He is a laboratory manager of a surface water treatment plant, Menoufia Company for water and wastewater (MCWW), Holding Company for Water and Wastewater (HCWW), Egypt. His research focuses on the green synthesis of metallic nanoparticles. Currently, he is working on the construction of electrochemical sensors based on metallic nanoparticles to detect organic pollutants, especially pesticides and dyes in surface water. Ziad Khalifa is currently an Assistant Professor of Physical Chemistry at the British University in Egypt. He has been working for UNEP and EU on many development projects for the assessment and control of pollution in the Mediterranean region and West Asia. His main research interests are in the preparation of novel modified electrodes with applications in bio-chemical sensors and batteries. His current research activities are in the fields of green chemistry and control of pollution, as well as in the development of new eco-friendly routes for recycling of E-wastes. |
| ISSN: | 2633-5409 2633-5409 |
| DOI: | 10.1039/d1ma00769f |