Synthesis of Ag/NiO composite nanosheets and empty microspheres and their highly effective electrocatalytic properties

Abstract

Ag/NiO composite nanosheets and empty microspheres were fabricated by calcining the precursors synthesized via hydrothermal and solvothermal procedures involved four methods. The as-prepared samples were characterized by thermogravimetric and differential thermal analysis, X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy and field emission scanning electron microscopy, respectively. The electrocatalytic properties of Ag/NiO composites modified on a glassy carbon electrode for p-nitrophenol reduction were investigated. The results showed that Ag/NiO composites exhibited highly enhanced electrocatalytic activity than a bare glassy carbon electrode, for not only the peak current increased clearly but also the corresponding peak potential decreased markedly. As a comparison, two NiO samples were used and the results showed that the peak current has an increase but the peak potentials have a slight decrease by comparing to a bare glassy carbon electrode. The Ag/NiO composites have the potential application in the electrocatalysis for the reduction of nitrophenol materials.

Production of NiO, NiO/Ag, NiO/Au, and NiO/Pt hollow spheres by using block copolymer stabilized microspheres as a template

“…In recent years, a lot of research has been done on the use of NiO in more areas and doping with metals to increase its performance further. New types of materials with very good chemical and physical properties can be synthesized by doping NiO with metal oxides 2 or other metals 41–52 . Studies are also carried out to use metal‐added materials as catalysts, due to the synergistic effect created by the use of metals such as Ag, Au, and Pt together.…”

“…Studies are also carried out to use metal‐added materials as catalysts, due to the synergistic effect created by the use of metals such as Ag, Au, and Pt together. Many studies have been conducted in the literature with different sizes of NiO, 42–46 NiO/Ag, 43,47,48 NiO/Pt, 41,49,50 and NiO/Au 49,51,52 and these materials have been used in a variety of applications as electrocatalyst, 43,47,49–51 photocatalysts, 48,53,54 supercapacitors, 44,46 batteries, 45,55 adsorption, 29,51 and sensor 56–58 . When the catalytic activities of the materials are examined, it is seen that it depends on the morphology, size and composition of the structure.…”

Electrochemical Sensor for Detection of p‐Nitrophenol Based on Nickel Oxide Nanoparticles/α‐Cyclodextrin Functionalized Reduced Graphene Oxide

“…It is also reported that nickel oxide nanoparticles modified electrodes exhibited high electrocatalytic activity towards different organic and bio-molecules [43]. In recent years, a great deal of progress has been made in NiO based materials for instance, NiO/CuO nanocomposites [44], Ni 0 /NiO core-shell nanostructure [45],Ag/NiO nanocomposite [46], NiOÀ CeO 2 nanocomposite [47],NiOÀ NPs-ionic liquid [48] for electrochemical sensing of pÀ NP.…”