The solubility of NiO(cr) was measured using flow techniques and a potentiometric method from ca. 0 to 350°C in aqueous solutions as a function of pH. A more limited study of the solubility of -Ni(OH)2(cr) was conducted by both techniques to 200°C. These results indicate that the transition temperature at which nickel hydroxide dehydrates to form the oxide is ca. 75°C, much lower than previousl...

The nanosized effects of short-range multimagnon excitation behavior and short-circuit diffusion in NiO nanowalls synthesized using the Ni grid thermal treatment method were observed. The energy dispersive spectroscopy mapping technique was used to characterize the growth mechanism, and confocal Raman scattering was used to probe the antiferromagnetic exchange energy J2 between next-nearest-nei...

The study compares the photocatalytic behavior of TiO2, NiO-TiO2, and Ni-NiO-TiO2 photocatalysts in hydrogen production from methanol–water solution. TiO2 NiO-TiO2 with theoretical NiO loading 0.5, 1.0, 3.0 wt. % were prepared by sol–gel method. partial reduction at 450 °C. showed significantly higher than photocatalysts. structural, textural, redox, optical properties all studied using XRD, SE...

In the title compound, [Ni(N(3))(2)(C(10)H(14)N(3)O(2)S)(2)], the Ni(II) atom lies on an inversion center and adopts a distorted trans-NiO(2)N(4) octa-hedral geometry, coordinated by two N,O-bidentate 4,4,5,5-tetra-methyl-2-(5-methyl-imidazol-4-yl)-2-imidazoline-1-oxyl 3-oxide nitronyl nitroxide radical ligands and two monodentate azide anions.

We investigate the magnetic coupling at the Co/NiO interface using soft x-ray magnetic linear dichroism (XMLD) and circular dichroism taking explicitly into account the recently observed angular dependence of the XMLD with respect to the crystallographic axes. We find that the Co moments are aligned perpendicular to the NiO moments. We discuss the impact of the anisotropic XMLD on the intensity...

The structure evolution behaviors of NiAu nanospindles in oxidizing/vacuum conditions were studied by in situ scanning transmission electron microscopy. The spindle structure transforms into Ni@Au@NiO multi-shell structure in the oxidizing atmosphere following an oxidation-driving multilayer reconstruction mechanism. In the vacuum condition, the NiAu nanospindles evolve along four distinct stag...

We have reexamined the valence-band (VB) and core-level electronic structure of NiO by means of hard and soft x-ray photoemission spectroscopies. The spectral weight of the lowest energy state was found to be enhanced in the bulk sensitive Ni 2p core-level spectrum. A configuration-interaction model including a bound state screening has shown agreement with the core-level spectrum and off- and ...

Nickel oxide (NiO) nanotubes have been produced for the first time via a template processing method. The synthesis involved a two step chemical eaction in which nickel hydroxide (Ni(OH)2) nanotubes were firstly formed within the walls of an anodic aluminium oxide (AAO) template. The ◦ emplate was then dissolved away using concentrated NaOH, and the freed nanotubes were converted to NiO by heat ...