A colorimetric probe for the detection of Ni2+ in water based on Ag-Cu alloy nanoparticles hosted in electrospun nanofibres | Zendy

DA Ondigo | Zendy; Boitumelo Mudabuka | Zendy; BO Pule | Zendy; Zenixole R. Tshentu | Zendy; Nelson Torto | Zendy

Open Access

A colorimetric probe for the detection of Ni2+ in water based on Ag-Cu alloy nanoparticles hosted in electrospun nanofibres

Author(s) -

DA Ondigo,

Boitumelo Mudabuka,

BO Pule,

Zenixole R. Tshentu,

Nelson Torto

Publication year - 2016

Publication title -

water sa

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.389

H-Index - 59

eISSN - 1816-7950

pISSN - 0378-4738

DOI - 10.4314/wsa.v42i3.05

Subject(s) - alloy , materials science , nanocomposite , nanoparticle , transmission electron microscopy , chemical engineering , detection limit , copper , scanning electron microscope , silver nanoparticle , nuclear chemistry , analytical chemistry (journal) , nanotechnology , chemistry , composite material , metallurgy , chromatography , engineering

A Ni 2+ based colorimetric probe based on glutathione-stabilized silver/copper nanoparticles (GSH-Ag-Cu alloy NPs) in an electrospun polymer matrix is reported. Glutathione-Ag-Cu alloy NPs were characterized by ultraviolet-visible spectroscopy (UV-vis), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The freshly synthesized GSH-Ag-Cu alloy NPs in a polymer matrix were black in colour due to an intense surface plasmon absorption band at 424 nm. However the electrospun nanocomposite fibres were green in colour and in the presence of Ni 2+ the green GSH-Ag-Cu alloy NP fibres were discoloured. The sensitivity of the GSH-Ag-Cu alloy NPs towards other representative transition, alkali and alkali earth metal ions was negligible. The effect of the concentration of Ni 2+ on the nanocomposite fibres was evaluated and the ‘eye-ball’ limit of detection was found to be 5.8 μg/mL. Keywords : colorimetric probes, alloy nanoparticles, electrospun nanofibres, heavy metal determination

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