Preparation of Nano-Particles of Metal Oxides via a Novel Solid-Liquid Mechanochemical Reaction Technology

2007 ◽  
pp. 671-674
Author(s):  
Ding Chen ◽  
Song Ni ◽  
Geng Li Chen ◽  
Zhen Hua Chen
Keyword(s):  
Metal Oxides ◽  
Nano Particles ◽  
Mechanochemical Reaction ◽  
Solid Liquid

Preparation of Nano-Particles of Metal Oxides via a Novel Solid-Liquid Mechanochemical Reaction Technology

2007 ◽  
Vol 26-28 ◽  
pp. 671-674 ◽  
Author(s):  
Ding Chen ◽  
Song Ni ◽  
Geng Li Chen ◽  
Zhen Hua Chen
Keyword(s):  
Metal Oxides ◽  
Ball Mill ◽  
Reaction Rate ◽  
Ph Value ◽  
Nano Particles ◽  
Metal Particles ◽  
Mechanochemical Reaction ◽  
Metal Powders ◽  
The Mean ◽  
Solid Liquid

Nano-particles of metal oxides Mn3O4, Cu2O, Fe3O4, the mixture of Zn(OH)2 and ZnO have been successfully prepared via a novel solid-liquid mechanochemical reaction technology. The metal powders are ground in water solutions using planetary ball mill. The solid-liquid reactions can occur on the surface of the powders and the reacted layer can be continuously peeled off during milling. The mean sizes of the as-prepared particles are approximately 20~100nm.The formation of nano-particles is attributed to the reactions between particles and solution as well as the repeated and quick peeling of the formed oxides on the surface of metal particles. Furthermore, the reaction rate and phase types of the products can be controlled by adjusting the pH value of the solution.

Various Applications of Silver Nano-Particles by Ultrasonic Eco-Fabrication

2005 ◽  
Vol 486-487 ◽  
pp. 530-533 ◽  
Author(s):  
Yamato Hayashi ◽  
Hirotsugu Takizawa ◽  
Yoshitaka Saijo ◽  
Tohru Sekino ◽  
Katsuaki Suganuma ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Noble Metal ◽  
Room Temperature ◽  
Silver Oxide ◽  
Nano Particles ◽  
Metal Particles ◽  
Noble Metal Oxides ◽  
Alcohol System ◽  
Silver Metal ◽  
Suitable Process

Applications of silver nano-sized metal particles were investigated for a new, ecologically friendly and economical liquid-solid (silver oxide-alcohol) system. Silver metal oxides as starting materials have merits in metal particles fabrication because these materials are decomposed only by heating in air. That is, noble metal oxide does not use thestrong reduction atmosphere. This reduction is ecologically clean because many noble metal oxides are not toxic, and because O2 is evolved during decomposition. We reduced silver metal oxides by ultrasound and fabricated silver nano metal nanoparticles at room temperature, and various applications were investigated. By choosing a suitable process and conditions, it is reasonable to expect that ultrasonic eco-fabrications can be extended to obtain various silver nano-particles containing materials.

scholarly journals Applications of Metal Oxides as Nano Particles

2018 ◽  
Vol 6 (1) ◽  
Author(s):  
Ramesh Kumar Prajapati ◽  
Mohd. Ayub Ansari
Keyword(s):  
Metal Oxides ◽  
Vital Role ◽  
Nano Particles

Presently Nanotechnology is known to be a special branch of chemical, physical and metallurgical sciences and playing a vital role. This paper describes the usage of metal oxides in the form of Nanoparticles because of its commercial and research developments

Cryomilling and Characterization of Metal/Ceramic Powders

2012 ◽  
Vol 512-515 ◽  
pp. 127-131 ◽  
Author(s):  
Qing Hou ◽  
Zhi Cheng Shi ◽  
Run Hua Fan ◽  
Li Cheng Ju
Keyword(s):  
Liquid Nitrogen Temperature ◽  
Mechanochemical Reaction ◽  
Solid Reaction ◽  
Scanning Calorimetry ◽  
Model Free ◽  
Particle Size Analyzer ◽  
Long Time ◽  
Solid Liquid ◽  
Kinetics Of

Al/Fe2O3 thermite powders were prepared by cryomilling at liquid nitrogen temperature. The cryogenic temperature will restrain the mechanochemical reaction between alumina and iron oxide, leading to high reactivitive nanoscale powders. The size distribution of the powders was analyzed using laser particle size analyzer, and cryomilling was proved to be an effective method to prepare ultrafine powders. The differential scanning calorimetry (DSC) analysis indicated that the cryomilled powders get more fully-reacted, a larger proportion of solid-solid reaction and more heat release in the solid-liquid reaction, comparing with the powders milled at room temperaure. Furthermore, the reaction kinetics of Al-Fe2O3 system is analyzed by a model-free Starink method. The activation energy for solid-solid reaction of 2Al-Fe2O3 thermite mixture cryomilled for 40 min is determined as 250 kJ/mol. The alternating gradient magnetometer (AGM) analysis shows that long time milling evoked the thermit reaction between Al and Fe2O3, leading to the increase in saturation magnetization (Ms) and remanent magnetization (Mr).

Growth of Zinc Oxide Nanoparticles by the Reaction of Zinc with Ethanol

2009 ◽  
Vol 67 ◽  
pp. 215-219 ◽  
Author(s):  
M. Ashraf Shah
Keyword(s):  
Zinc Oxide ◽  
Metal Oxides ◽  
Metal Surface ◽  
Zinc Oxide Nanoparticles ◽  
Nano Particles ◽  
Oxide Nanoparticles ◽  
Simple Reaction ◽  
Zinc Metal ◽  
Novel Approach ◽  
Plausible Mechanism

A novel approach has been described for the synthesis of zinc oxide nanoparticles by a very simple reaction of zinc metal with ethanol at 100oC. The diameters of the nano-particles range from 50–100nm. The reaction involves the cleavage of C-O bond of the alcohol, which occurs readily on zinc metal surface. Addition of ethylenediamine to the reaction yields nanorods, thus acting as a shape directing agent. A plausible mechanism is proposed for the formation of these nanostructures and is expected that this synthetic technique can be extended to obtain other metal oxides.

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