Fabrication and characterization of poly(ethylene oxide) templated nickel oxide nanofibers for dye degradation

Abstract

In the present study, one dimensional nickel oxide (NiO) nanofibers were successfully fabricated using an inexpensive and simplistic electrospinning technique to evaluate their efficient applicability as a photocatalyst in dye degradation processes. The synthesis part involves the calcination of electrospun poly(ethylene oxide)/ nickel acetate tetrahydrate nanofibers to obtain phase pure cubic NiO nanofibers, which were further characterized using various techniques to determine their physical and chemical properties. Furthermore, the photocatalytic activity of these NiO nanofibers along with their kinetics of degradation was studied with the photodegradation of model dye Congo red (CR) under visible light irradiation. Interestingly, the photocatalytic properties of the NiO nanofibers were found to be better than those of the nanoparticles when compared, and were found to be dependent on the concentrations of the loaded photocatalyst.Besides this, the stability of the nanofibers in aqueous solution was examined along with their reusability.

Facile Synthesis of Electrospun Nickel (II) Oxide Nanofibers and Its Application for Hydrogen Peroxide Sensing

“…The metal‐oxygen frequencies observed in this study are well matched with reported results . The mode present at 1135 cm −1 corresponding to the C−N stretching and remaining two modes 1615, 2348 cm −1 are assigned to the vibrations of water molecules …”

“…[30] The mode present at 1135 cm À 1 corresponding to the CÀ N stretching and remaining two modes 1615, 2348 cm À 1 are assigned to the vibrations of water molecules. [31] It is well known that band gap is a vital parameter in determining the characteristics of semiconductor materials which is recorded by UV absorption spectrum. Figure 2(b) shows the optical absorption spectrum of the NiO nanofibers at the room temperature.…”

Silver nanoparticle embedded copper oxide as an efficient core–shell for the catalytic reduction of 4-nitrophenol and antibacterial activity improvement

“…The fact that CuO@Ag 0 displays negative Zeta potential in the entire pH range indicates a higher and more stable dispersion as compared to CuO. Even though this is a special feature of improved repulsion between similarly charged particles of metal loaded oxide [20,21], this must be mainly due to the disappearance of H-bridges between the particles as a result of the involvement of terminal OH groups of CuO in Ag:OH-interaction, as previously stated.…”

Morphology enhancement of TiO2/PVP composite nanofibers based on solution viscosity and processing parameters of electrospinning method

“…The role of carrier polymer is to adjust the viscosity of the solution used for fabrication of the electrospun nanofibers . Some of the commonly used polymers as carrier medium are poly(vinyl pyrrolidone) (PVP), poly(vinyl acetate), poly(ethylene oxide), polyacrylonitrile, and poly(vinyl alcohol) …”