Electrochemical determination of heavy metals by a graphene quantum dots/porphyrin-based supramolecular system

IF 4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Synthetic Metals Pub Date : 2024-12-30 DOI:10.1016/j.synthmet.2024.117824

Mariachiara Sarà , Khouloud Abid , Pietro Giuseppe Gucciardi , Luigi Monsù Scolaro , Giovanni Neri

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引用次数: 0

Abstract

This work reports the development of an electrochemical sensor for heavy metals determination based on a graphene quantum dots/porphyrin (GQDs@TPPS) supramolecular system. GQDs@TPPS with different GQDs:TPPS ratios (ranging from 1:3–1:9 w/w) were first prepared and characterized by a series of techniques, including UV-Vis and fluorescence emission titration. These systems were used as electrode modifiers for developing modified screen-printed carbon electrode (SPCE) for the determination of heavy metal ions. The GQDs@TPPS/SPCE modified electrodes were found to be more suitable for the electro-analytical determination of Cd and Cu ions. Optimizing the GQDs:TPPS ratio, an improvement in the sensitivity, low limit of detection (LOD), and selectivity towards these two metal ions were obtained in comparison to bare/SPCE. The use of the developed GQDs@TPPS/SPCE sensors for the monitoring of Cd and Cu ions in seawater has been also demonstrated.

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来源期刊

Synthetic Metals 工程技术-材料科学：综合

CiteScore

8.30

自引率

4.50%

发文量

189

审稿时长

33 days

期刊介绍： This journal is an international medium for the rapid publication of original research papers, short communications and subject reviews dealing with research on and applications of electronic polymers and electronic molecular materials including novel carbon architectures. These functional materials have the properties of metals, semiconductors or magnets and are distinguishable from elemental and alloy/binary metals, semiconductors and magnets.