Electrospun Carbon Nanofiber Modified Electrodes for Stripping Voltammetry

Zhao, Dingtao; Wang, Tingting; Han, Daewoo; Rusinek, Cory A.; Steckl, A. J.; Heineman, William R.

doi:10.1021/acs.analchem.5b02017

Cited by 73 publications

(39 citation statements)

References 43 publications

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“…The background current is larger for the SSEBS-ITO electrode due to the increase in capacitance that is usually associated with coating electrodes with charged films. 40 …”

Section: Resultsmentioning

confidence: 99%

Bare and Polymer-Coated Indium Tin Oxide as Working Electrodes for Manganese Cathodic Stripping Voltammetry

et al. 2016

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Though an essential metal in the body, manganese (Mn) has a number of health implications when found in excess that are magnified by chronic exposure. These health complications include neurotoxicity, memory loss, infertility in males, and development of a neurologic psychiatric disorder- manganism. Thus, trace detection in environmental samples is increasingly important. Few electrode materials are able to reach the negative reductive potential of Mn required for anodic stripping voltammetry (ASV), so cathodic stripping voltammetry (CSV) has been shown to be a viable alternative. We demonstrate Mn CSV using an indium tin oxide (ITO) working electrode both bare and coated with a sulfonated charge selective polymer film, polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene-sulfonate (SSEBS). ITO itself proved to be an excellent electrode material for Mn CSV, achieving a calculated detection limit of 5 nM (0.3 ppb) with a deposition time of 3 min. Coating the ITO with the SSEBS polymer was found to increase the sensitivity and lower the detection limit to 1 nM (0.06 ppb). This polymer modified electrode offers excellent selectivity for Mn as no interferences were observed from other metal ions tested (Zn2+, Cd2+, Pb2+, In3+, Sb3+, Al3+, Ba2+, Co2+, Cu2+, Ni3+, Bi3+, and Sn2+) except Fe2+, which was found to interfere with the analytical signal for Mn2+ at a ratio 20:1 (Fe2+:Mn2+). The applicability of this procedure to the analysis of tap, river, and pond water samples was demonstrated. This simple, sensitive analytical method using ITO and SSEBS-ITO could be applied to a number of electroactive transition metals detectable by CSV.

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“…The background current is larger for the SSEBS-ITO electrode due to the increase in capacitance that is usually associated with coating electrodes with charged films. 40 …”

Section: Resultsmentioning

confidence: 99%

Bare and Polymer-Coated Indium Tin Oxide as Working Electrodes for Manganese Cathodic Stripping Voltammetry

et al. 2016

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“…Thus, the detection of lead is important. Anodic stripping voltammetry (ASV) is a powerful electroanalytical technique for trace metal measurement . The analysis procedure involves a preconcentration step to accumulate metal on the electrode surface by reducing the metal ions to atoms, followed by a stripping step to reoxidize the metal to its ionic form.…”

Section: Figurementioning

confidence: 97%

“…Osteryoung square wave stripping voltammetry (OSWSV) was used for the stripping step due to its ability to achieve low limits of detection by minimizing interference from nonfaradaic current . A supporting electrolyte of 0.1 M acetate buffer pH 4.5 was chosen because it has been found to be a good medium for ASV of heavy metals detection .…”

Section: Figurementioning

confidence: 99%

Electrochemical Studies of Three Dimensional Graphene Foam as an Electrode Material

et al. 2017

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Graphene foam is one kind of network of three dimensional (3D) graphene, which inherits the properties of two dimensional graphene and overcomes the aggregation/stacking of graphene sheets. In this work, graphene foam has been characterized by scanning electron microscopy and Raman spectroscopy. A graphene foam electrode was evaluated as a new electrode material by cyclic voltammetry (CV) and used for the detection of trace level of Pb2+ by anodic stripping voltammetry (ASV). Under the optimized condition of deposition potential (‐1.2 V) and deposition time (2 min), the detection limit is estimated to be 40 nM for Pb2+ based on the 3σ method.

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“…Nanofiber‐based physical adsorption methods with heavy metal receptors have also been applied to fabricate ENM‐immobilized electro‐chemosensors (Figure D). Zhao et al fabricated carbon ENMs by an electrospinning technique. Then, Nifion was physically adsorbed onto the surface of carbon nanofibers ( Figure ).…”

Section: Application Of Enms In Electro‐chemosensors For Heavy Metal mentioning

confidence: 99%

Section: Application Of Enms In Electro‐chemosensors For Heavy Metal mentioning

confidence: 99%

Recent Advances of Electrospun Nanofibrous Membranes in the Development of Chemosensors for Heavy Metal Detection

Zhang

Qiao

et al. 2017

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It is critical to detect and analyze the heavy metal pollutions in environments and foods. Chemosensors have been widely investigated for fast detection of analytes such as heavy metals due to their unique advantages. In order to improve the detection sensitivity of chemosensors, recently electrospun nanofibrous membranes (ENMs) have been explored for the immobilization of chemosensors or receptors due to their high surface-to-volume ratio, high porosity, easiness of fabrication and functionalization, controllability of nanofiber properties, low cost, easy detection, no obvious pollution to the detection solution, and easy post-treatment after the detection process. The purpose of this review is to summarize and guide the development and application of ENMs in the field of chemosensors for the detection of analytes, especially heavy metals. First, heavy metals, chemosensors, and four types of preparation methods for ENM-immobilized chemosensors/receptors are briefly introduced. And then, ENM-immobilized chemosensors/receptors and their application progresses for optical, electro, and mass detections of heavy metals are reviewed according to the four types of preparation methods. Finally, the application of ENM-immobilized chemosensors/receptors is summarized and an outlook is provided. The review will provide an instruction to the research and development of ENM-immobilized chemosensors/receptors for the detection of analytes.

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Electrospun Carbon Nanofiber Modified Electrodes for Stripping Voltammetry

Cited by 73 publications

References 43 publications

Bare and Polymer-Coated Indium Tin Oxide as Working Electrodes for Manganese Cathodic Stripping Voltammetry

Bare and Polymer-Coated Indium Tin Oxide as Working Electrodes for Manganese Cathodic Stripping Voltammetry

Electrochemical Studies of Three Dimensional Graphene Foam as an Electrode Material

Recent Advances of Electrospun Nanofibrous Membranes in the Development of Chemosensors for Heavy Metal Detection

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