Electrochemical and photocatalytic investigation of nickel oxide for energy storage and wastewater treatment

Duraisamy, Navaneethan; Kandiah, Kavitha; Rajendran, Ranjith; Prabhu, Shivananda; Ramesh, R.; Gopi, D.

doi:10.1007/s11164-018-3446-5

Cited by 27 publications

(5 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is an indication of a second optical bandgap at 3.50 eV for the Co20Ni80 cathode. NiO has a direct optical bandgap of about 3.8 eV[18][19][20][51][52][53]. A similar optical bandgap is observed for CoO[53].…”

supporting

confidence: 58%

See 1 more Smart Citation

Crystalline Structure and Optical Properties of Cobalt Nickel Oxide Thin Films Deposited with a Pulsed Hollow-Cathode Discharge in an Ar+O2 Gas Mixture

Kapran,

Hippler,

Wulff

et al. 2024

Coatings

View full text Add to dashboard Cite

Cobalt nickel oxide films are deposited on Si(111) or fluorine-doped tin-oxide-coated (FTO) glass substrates employing a pulsed hollow-cathode discharge. The hollow cathode is operated with argon gas flowing through the nozzle and with O2 gas admitted to the vacuum chamber. Three different cathode compositions (Co20Ni80, Co50Ni50, and Co80Ni20) are investigated. Deposited and annealed thin films are characterized by X-ray diffraction, infrared (Raman) spectroscopy, and ellipsometry. As-deposited films consist of a single mixed cobalt nickel oxide phase. Upon annealing at 600 °C, the mixed cobalt nickel oxide phase separates into two cystalline sub-phases which consist of cubic NiO and cubic Co3O4. Annealed films are investigated by spectroscopic ellipsometry and the optical bandgaps are determined.

show abstract

supporting

confidence: 58%

“…The optical bandgaps of cobalt oxide and nickel oxide are rather different. NiO has a direct optical bandgap of about 3.8-4.1 eV [17][18][19][20]. Smaller optical bandgaps of about 2 eV have been reported for cobalt oxide [21,22].…”

Section: Introductionmentioning

confidence: 97%

Crystalline Structure and Optical Properties of Cobalt Nickel Oxide Thin Films Deposited with a Pulsed Hollow-Cathode Discharge in an Ar+O2 Gas Mixture

Kapran,

Hippler,

Wulff

et al. 2024

Coatings

View full text Add to dashboard Cite

show abstract

“…Because the semiconductor-based materials have a suitable band structure with the illuminated appropriate light source, the electrons, and holes are generated which can potentially produce hydroxyl radicals ( • OH) and superoxide radicals ( −• O 2 ) through various light-driven chemical reactions. Thus the widely-studied semiconductor photocatalysts are CeO 2 , ZnO, TiO 2 , CdS, Ta 3 N 5 , PbWO 3 , NiO, and BiFeO 3 are proved to be an effective photocatalyst [1][2][3][4][5][6][7][8][9]. Among the several semiconducting photocatalysis, TiO 2 has been considered a promising product in the photocatalytic process due to its high photocatalytic activity, chemical stability, non-toxicity, relatively inexpensive, and showing substantial UV light absorption.…”

Section: Introductionmentioning

confidence: 99%

Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity

Kunnamareddy¹,

Rajendran

Megala

et al. 2021

J Inorg Organomet Polym

Self Cite

View full text Add to dashboard Cite

In this work, Nickel (Ni) and sulfur (S) codoped TiO2 nanoparticles were prepared by a sol-gel technique. The as-prepared catalyst was characterized using X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), FT-Raman spectroscopy, scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectra (DRS) for investigating crystal structure, crystal phase, particle size and bandgap energy of these samples. The photocatalytic performances of all the prepared catalysts have been investigated for the degradation of methylene blue (MB) under visible light irradiation. It was noticed that Ni-S codoped TiO2(Ni-S/TiO2) nanoparticles exhibited much higher photocatalytic activity compared with pure, Ni and S doped TiO2 due to higher visible light absorption and probable decrease in the recombination of photo-generated charges. It was decided that the great visible light absorption was created for codoped TiO2 by the formation of impurity energy states near both the edges of the collection, which works as trapping sites for both the photogenerated charges to decrease the recombination process.

show abstract

“…An adequate amount of slurry was used to deposit on Ni foam with coating area of 1× 1 cm 2 . Before this process, Ni foam was washed with acid, detergent, ethanol, and deionized water to remove all surface impurities [18] 3. DISCUSSIONS AND FINDINGS…”

Section: 5 Fabrication Of Electrode Materialsmentioning

confidence: 99%

NiO/MnO2 nanocomposite in addition of layered Reduced Graphene oxide (RGO) electrode for accountable supercapacitor application

Thangavel,

Balakrishnan,

Murugesan

2024

Zas Mat

View full text Add to dashboard Cite

Reduced Graphene oxide/Nickel oxide/Magnesium dioxide) RGO/NiO/MnO2 nanocomposite electrode was successfully prepared by simple co-precipitation method. The synthesised nanocomposite was characterised by XRD, FESEM, EDAX, FTIR, UV, CV, GCD, EIS. The RGO/NiO/MnO2 nanocomposite was pretreated by ultrasonication, followed by thermal annealing at 350 oC. The crystalline face and size of nanocomposite were analysed by X-Ray Diffraction (XRD). The sandwich-like structure of RGO/NiO/MnO2 was analysed by Scanning Electron Microscope (SEM). This structure promoted an efficient contact between electrolyte and active materials, and the distinct architecture could offer fast transfer channels of ion and electrons. The nanocomposite exhibited high conductivity owing to the presence of RGO. The electrochemical performance of prepared nanocomposite was done by Cyclic Voltammetry (CV), Galvanostatic charge discharge (GCD), Electrical Impedance Spectroscopy (EIS). The synthesised RGO/NiO/MnO2 nanocomposite acquired high specific capacitance of 1167F/g at current density of 1 A/g. The low cost, low temperature RGO/NiO/MnO2 nanocomposite electrode could be the promising electrode for Energy storage devices.

show abstract

Electrochemical and photocatalytic investigation of nickel oxide for energy storage and wastewater treatment

Cited by 27 publications

References 47 publications

Crystalline Structure and Optical Properties of Cobalt Nickel Oxide Thin Films Deposited with a Pulsed Hollow-Cathode Discharge in an Ar+O2 Gas Mixture

Crystalline Structure and Optical Properties of Cobalt Nickel Oxide Thin Films Deposited with a Pulsed Hollow-Cathode Discharge in an Ar+O2 Gas Mixture

Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity

NiO/MnO2 nanocomposite in addition of layered Reduced Graphene oxide (RGO) electrode for accountable supercapacitor application

Contact Info

Product

Resources

About