TY - JOUR
T1 - Synthesis and characterization of polypyrrole decorated graphene/β-cyclodextrin composite for low level electrochemical detection of mercury (II) in water
AU - Palanisamy, Selvakumar
AU - Thangavelu, Kokulnathan
AU - Chen, Shen Ming
AU - Velusamy, Vijayalakshmi
AU - Chang, Min Hui
AU - Chen, Tse Wei
AU - Al-Hemaid, Fahad M.A.
AU - Ali, M. Ajmal
AU - Ramaraj, Sayee Kannan
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2017
Y1 - 2017
N2 - 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−1with the limit of detection (LOD) of 0.47 nM L−1. The obtained LOD 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.
AB - 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−1with the limit of detection (LOD) of 0.47 nM L−1. The obtained LOD 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.
KW - Graphene
KW - Health and environment
KW - Mercury (II)
KW - Polypyrrole
KW - Screen printed carbon electrode
KW - β-cyclodextrin
UR - http://www.scopus.com/inward/record.url?scp=85007268659&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2016.12.068
DO - 10.1016/j.snb.2016.12.068
M3 - Article
AN - SCOPUS:85007268659
SN - 0925-4005
VL - 243
SP - 888
EP - 894
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
ER -
