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
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.
基于石墨烯量子点/卟啉的超分子体系电化学测定重金属
这项工作报告了一种基于石墨烯量子点/卟啉(GQDs@TPPS)超分子体系的重金属测定电化学传感器的开发。首先制备了不同GQDs:TPPS比(1:3-1:9 w/w)的GQDs@TPPS,并通过UV-Vis和荧光发射滴定等一系列技术对其进行了表征。这些体系被用作电极改性剂,用于开发用于测定重金属离子的改性丝网印刷碳电极(SPCE)。GQDs@TPPS/SPCE修饰电极更适合Cd和Cu离子的电分析测定。优化GQDs:TPPS比,与裸/SPCE相比,对这两种金属离子的灵敏度、低检出限(LOD)和选择性都有所提高。还演示了使用开发的GQDs@TPPS/SPCE传感器监测海水中的Cd和Cu离子。
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来源期刊
Synthetic Metals
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.
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