Functionalized silver nanoparticle-decorated paper sensor for rapid colorimetric detection of copper ions in water
- 1 September 2021
- journal article
- research article
- Published by IOP Publishing in Functional Composites and Structures
- Vol. 3 (3), 035007
- https://doi.org/10.1088/2631-6331/ac25e9
Abstract
Copper contamination to water bodies is an environmental concern of significant risk due to its harmful effect on aquatic life forms and human beings. Herein, a paper-based colorimetric sensor was fabricated by immobilizing polyethyleneimine-capped silver nanoparticles (PEI-AgNPs) on commercial filter paper. The sensitivity and selectivity of the paper-based sensor's colorimetric response to copper ions in water were investigated. PEI-AgNPs with an average diameter of 12.66 ± 4.07 nm were successfully immobilized on the filter paper by the simple dipping technique, as evidenced by the SEM-EDX result. A color change from pale yellow to dark yellow green was noted after exposing the paper sensor in a water sample with copper ions. This colorimetric response was exclusively observed for copper ions only, suggesting the selectivity of the paper sensor towards copper ions. Moreover, UV-Vis spectroscopy results revealed that the detection limit of the paper sensor was observed to about 1.0 ppm. Meanwhile, color analysis on the sensor's digital images revealed the linear response of the sensor with decreasing copper ion concentration down to 1.0 ppm. The selectivity of the sensor was also observed by the color intensity profile of the sensor. This work presents promising results that can be utilized as a reference for developing affordable, fast, portable, and reliable sensing devices for on-site water quality monitoring and other applications.Keywords
Funding Information
- Commission on Higher Education
This publication has 25 references indexed in Scilit:
- Tyrosine capped silver nanoparticles: A new fluorescent sensor for the quantitative determination of copper(II) and cobalt(II) ionsJournal of Colloid and Interface Science, 2016
- Cellulose‐Derived Supercapacitors from the Carbonisation of Filter PaperChemistryOpen, 2015
- Localized Surface Plasmon Resonance Biosensing: Current Challenges and ApproachesSensors, 2015
- Polyethyleneimine for copper absorption II: kinetics, selectivity and efficiency from seawaterRSC Advances, 2015
- Visual colorimetric sensing of copper ions based on reproducible gelatin functionalized silver nanoparticles and gelatin hydrogelsColloids and Surfaces A: Physicochemical and Engineering Aspects, 2014
- Sensitive and Selective Detection of Copper Ions with Highly Stable Polyethyleneimine-Protected Silver NanoclustersAnalytical Chemistry, 2013
- Colorimetric detection of Cu2+ using 4-mercaptobenzoic acid modified silver nanoparticlesColloids and Surfaces A: Physicochemical and Engineering Aspects, 2011
- Colorimetric detection of copper ions in tap water during the synthesis of silver/dopamine nanoparticlesChemical Communications, 2011
- Digital Image Analysis to Standardize a Photometric Method in Colorimetric QuantificationInstrumentation Science & Technology, 2007
- Particulate matter characterization at a coastal site in south-eastern ItalyJournal of Environmental Monitoring, 2005