New Functional Materials Based on Nano- and Micro-Objects with Developed Surface

Abstract

The paper describes the materials with a developed surface fabricated on the basis of electrodeposited copper icosahedral small particles and coatings made of such particles. Increasing the specic surface area of the electrolytic metal is achieved by special heat and/or chemical treatments. Changes in the structure and morphology of icosahedral small particles are analyzed with scanning electron microscopy and X-ray diraction. The specic surface area of the material is determined with low-temperature gas adsorption technique. Annealing of icosahedral small particles and coatings leads to the formation of the porous structure and a forest of whiskers on their surface.Chemical etching of icosahedral small particles corrodes the inside material and provides the formation of hollow particles. Possible applications for obtained materials with a developed surface are oered.

CuO Nanowhiskers-Based Photocatalysts for Wastewater Treatment

“…But at temperature above 600 °C the amount of whiskers were reduced. The optimum temperature for maximum concentration and length of whisker structures is close to 400 °C [14,15]. Nanowhiskers diameter in this case is below 100 nm and the length ranged from 5 to 15 µm.…”

CuO nanowhiskers: Preparation, structure features, properties, and applications

“…Data on the optimal growth temperatures of NWs in a number of works differ significantly. For example, according to [6] whiskers of CuO grow only at temperatures between 400 and 700°C, in [23] the temperature range is determined between 250 and 450°C, and in this work in the 250 and 600°C range. Probably this is a consequence of the fact that the initial state of copper (residual or internal stresses, structural defects) influences decisively the formation and growth of whiskers.…”

“…Recently, considerable attention has been paid to synthesis, growth mechanism, structure, properties, and applications of nanowhiskers (NWs) of copper oxide (CuO) [1][2][3][4][5][6]. Bulk CuO has a monoclinic crystal structure; it belongs to the few metal-oxide semiconductors that possess intrinsic p-type conductivity with a narrow band gap of 1.2 eV [7].…”

Spectroscopic Studies of CuO-incorporated PEO Nanocomposite Films for Flexible Optoelectronic Devices

“…Its applications extend to fields such as materials science, agriculture, and animal feed. Copper oxide continues to be an area of active research, with ongoing efforts to explore new applications and improve its properties for various industrial and scientific purposes [9]. PEO-CuO nanocomposites, which are composed of polyethylene oxide (PEO) and copper oxide (CuO) nanoparticles, have gained important attention due to their unique properties and potential applications in various fields.…”