Novel Nanotrees of Crystalline Nickel formed via Electrolytic Approach

Abstract

Abstract:Tree-shaped nickel nanocrystals with long main trunk and highly ordered branches were prepared via electrolytic method in ethylene glycol solution. The morphology and structures of nanotrees of crystalline nickel can be controlled by the processing of the surfactant (PVP) and electrolytic voltage. Magnetic property measurements at room temperature indicated that the as-prepared nanotrees of crystalline nickel possess higher saturation magnetism (MS) and coercivity (HC) than those of corresponding bulk nickel materials.

Zinc-doped nickel oxide dendritic crystals with fast response and self-recovery for ammonia detection at room temperature

“…Meanwhile, Cl À ions were oxidized to chlorine atoms via losing electrons, and two chlorine atoms combined to a chlorine gas molecule and released from the anode. 32,33 The second step was the high temperature heat treatment of as-synthesized Ni (1Àx) Zn x dendritic crystals at 450 C for 8 h to obtain Ni (1Àx) Zn x O dendritic crystals in open air. The specific chemical reactions for the synthesis can be expressed as follows:…”

Solid–Solid Separation Approach for Preparation of Carbon-Supported Cobalt Carbide Nanoparticle Catalysts for Oxygen Reduction

“…Thereafter, a gradual increase in the weight of about 16.1% is observed at 500 °C and above. This is attributed to the direct oxidation of CoC x , which in turn adds weight to the sample. , In contrast, C@CoC x shows an apparent three-step weight change, wherein a sharp weight loss (36.2%) is observed at about 410 °C due to the removal of the surface moisture as well as a carbon nanotube in the form of CO 2 through the oxidation process. , Thereafter, a further change in the weight is observed at 500 °C. This can be attributed to the CoC x oxidation process, and the remaining weight is found to be 50% at 800 °C.…”

“…This is attributed to the direct oxidation of CoC x , which in turn adds weight to the sample. 24,25 In contrast, C@CoC x shows an apparent three-step weight change, wherein a sharp weight loss (36.2%) is observed at about 410 °C due to the removal of the surface moisture as well as a carbon nanotube in the form of CO 2 through the oxidation process. 24,26 Thereafter, a further change in the weight is observed at 500 °C.…”