Electrochemical detection of mercury using biosynthesized hydroxyapatite nanoparticles modified glassy carbon electrodes without preconcentration

Kanchana, P.; Sudhan, Narayanan; Sundaramurthy, Anandhakumar; Mathiyarasu, J.; Manisankar, P.; Sekar, C.

doi:10.1039/c5ra11424a

Cited by 68 publications

(19 citation statements)

References 25 publications

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“…The accurate and reliable detection of heavy metal ions have received substantial interest owing to their serious effect in the environment and human health [1,2]. Besides, the most of the environmental pollution are caused by the heavy metal ions in industrial waste water [3].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of polypyrrole decorated graphene/β-cyclodextrin composite for low level electrochemical detection of mercury (II) in water

Palanisamy

Kokulnathan

Chen

et al. 2017

Sensors and Actuators B: Chemical

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Mercury (Hg(II)) is considered as one of the most toxic element that directly affects the human health and the environment. Therefore, in this study, we propose a sensitive and disposable electrochemical sensor for the detection of Hg(II) in various water samples using polypyrrole (PPy) decorated graphene/β-cyclodextrin (GR-CD) composite modified screen-printed carbon electrode (SPCE). The GR-CD/PPy composite was synthesized by chemical oxidation of PPy monomer in GR-CD solution using FeCl3. Differential pulse voltammetry (DPV) is used for the detection of Hg(II) and the DPV results reveal that GR-CD/PPy composite modified SPCE has high sensitivity towards Hg(II) than bare, GR, GR-CD and PPy modified SPCEs. The optimization studies such as effect of pH, accumulating time and effect of scanning potential towards the detection of Hg(II) were investigated. The GR-CD/PPy composite modified SPCE could detect the Hg(II) up to 51.56 µM L-1 with the limit of detection (LOD) of 0.47 nM L-1. The LOD obtained was well below the guideline level of Hg(II) set by the World's Health Organization (WHO) and U.S. Environmental Protection Agency (EPA). In addition, the fabricated GR-CD/PPy composite modified SPCE selectively detected the Hg(II) in the presence of potentially interfering metal cations.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of polypyrrole decorated graphene/β-cyclodextrin composite for low level electrochemical detection of mercury (II) in water

Palanisamy

Kokulnathan

Chen

et al. 2017

Sensors and Actuators B: Chemical

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“…Green synthesis of HA got extensive scope because of its eco-friendly. Reducing, capping and stabilizing properties of many plant extracts such as Moringa oleifera leaf, gum-arabic, grape seed, banana, tamarind extract, Coccinia grandis and Azadirachta indica, orange, and potato peel, papaya leaf and calendula flower [10][11][12][13][14][15][16]. When an aqueous plant extract is used a green reducing agent during the synthesis of metal or metal oxide nanoparticles, explaining the role of a particular phytochemical is not an easy one.…”

Section: Introductionmentioning

confidence: 99%

Experimental studies on caffeine mediated synthesis of hydroxyapatite nanorods and their characterization

Subramanian¹,

Murugan²,

Chinnadurai³

et al. 2020

Mater. Res. Express

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Hydroxyapatite nanorods (HA) were fabricated using caffeine as a modifier at room temperature. Various concentrations of caffeine were utilized to synthesize the HA nanoparticles to analyze its effect on size, shape and morphology. The formation of phosphate ion was confirmed by Fourier Transform spectrophotometer (FTIR). Crystalline structure and phase of the nanoparticles was confirmed by x-ray diffraction study (XRD). The formation of HA nanorods with diversified morphology was confirmed by Transmission Electron Microscope (TEM) images. The results acquired in this study reveals that the HA nanoparticles synthesized using caffeine are uniform and evenly scattered nanorods. The average size of the nanorods obtained from the XRD study was in the range of 20-30 nm. The TEM and SAED investigation revealed the shape, morphology and arrangement of HA nanorods with higher crystallinity. This investigation claims that caffeine is a natural modifier to produce HA nanorods.

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“…Furthermore, the modified electrode in this work was compared with other previous works . The proposed GCE/PPy/S‐IIPs electrode shows good analytical results as shown in Table .…”

Section: Resultsmentioning

confidence: 99%

Application of a Polypyrrole/Carboxy Methyl Cellulose Ion Imprinted Polymer in the Electrochemical Detection of Mercury in Water

et al. 2018

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Sulphur containing carboxy methyl ion imprinted polymers (S‐IIPs) were applied as an electrode modifier for the electrochemical detection of Hg(II). A bare glassy carbon electrode (GCE) was modified by electro‐polymerizing a layer of pyrrole and then drop coating with S‐IIPs. The bare GCE, GCE/polypyrrole (GCE/PPy), GCE/polyprrole/non‐ion imprinted polymers (GCE/PPy/NIPs) and the GCE/polypyrrole/sulphur ion imprinted polymers (GCE/PPy/S‐IIPs) electrodes were characterised with Fourier Transmission Infrared (FTIR) and electrochemical impendence spectroscopy (EIS). The square wave anodic stripping voltammetry (SWASV) optimised conditions for the GCE/PPy/S‐IIPs were: a pH of 3, deposition potential of −1.0 V, pre‐concentration time of 60 s and 0.1 M HCl supporting electrolyte. The developed ion imprinted polymer electrochemical sensor was applied in the detection of Hg(II) in water. A detection limit of 0.1 μg L−1 was calculated within a concentration range of 20–800 μg L−1. The sensor was selective in the presence of interfering ions and method was validated with inductively coupled plasma‐optical emission spectrometry (ICP‐OES) using real water and standard water samples.

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Electrochemical detection of mercury using biosynthesized hydroxyapatite nanoparticles modified glassy carbon electrodes without preconcentration

Cited by 68 publications

References 25 publications

Synthesis and characterization of polypyrrole decorated graphene/β-cyclodextrin composite for low level electrochemical detection of mercury (II) in water

Synthesis and characterization of polypyrrole decorated graphene/β-cyclodextrin composite for low level electrochemical detection of mercury (II) in water

Experimental studies on caffeine mediated synthesis of hydroxyapatite nanorods and their characterization

Application of a Polypyrrole/Carboxy Methyl Cellulose Ion Imprinted Polymer in the Electrochemical Detection of Mercury in Water

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