title: Nickel oxide thin film from electrodeposited nickel sulfide thin film: peroxide sensing and photo-decomposition of phenol.
abstract: A novel non-enzymatic peroxide sensor has been constructed by using nickel oxide (NiO) thin films as sensing material, which were prepared by a two-step process: (i) electrodeposition of nickel sulfide (NiS) and (ii) thermal air oxidation of as-deposited NiS to NiO. The resultant material is highly porous and comprises interconnected nanofibers. UV-Vis spectroscopy, FTIR spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and field-emission scanning electron microscopy (FESEM) were used for a complete characterization of nanostructured NiO thin films. Cyclic voltammetry study shows that NiO/ITO electrode facilitates the oxidation of hydrogen peroxide and exhibits excellent catalytic activity towards its sensing. The amperometric study of NiO/ITO was carried out to determine the sensitivity, linear range, detection limit of the proposed sensor. The sensor exhibits prominent electrocatalytic activity toward the oxidation of H2O2 with a wide linear range and a low detection limit. The possible use of the synthesized NiO thin films as an effective photocatalyst for the decomposition of phenol is also discussed.
authors.affiliation: Department of Chemistry, Indian Institute of Engineering Science and Technology, Botanic Garden, Howrah 711103, WB, India. anupmondal2000@yahoo.co.in sumantajana85@gmail.com.
authors.forename: Sumanta
authors.initials: S
authors.lastname: Jana
authors.forename: Subhasis
authors.initials: S
authors.lastname: Samai
authors.forename: Bibhas C
authors.initials: BC
authors.lastname: Mitra
authors.forename: Pulakesh
authors.initials: P
authors.lastname: Bera
authors.forename: Anup
authors.initials: A
authors.lastname: Mondal