Preparation of Cu2O nanowires by thermal oxidation-plasma reduction method

Abstract

Facial synthesis of cuprous oxide (Cu 2 O) nanowires by directly heating copper substrates is difficult; however, in this study, it was successfully done by thermal oxidation followed by a plasma reduction process. The preparation of CuO nanowires with an average diameter of 76.2 nm supported on the surface of copper substrate was conducted first in air at 500°C for 3 hrs, and then the CuO nanowires were reduced into Cu 2 O in 15 min using either radio frequency (RF) N 2 plasma or microwave (MW) N 2 plasma. The characteristics of CuO and Cu 2 O nanowires were analyzed using XRD, FE-SEM, and TEM. The results showed that Cu 2 O nanowires can be successfully reduced from CuO nanowires by a simple, promising, and fast nitrogen plasma process. Moreover, in RF plasma, narrower and longer Cu 2 O nanowires can be produced as compared to MW plasma, because energetic N-containing species can reduce the nanowires at a relatively lower temperature.

Structural, electrical and H2 sensing properties of copper oxide nanowires on glass substrate by anodization

“…Various synthesis methods have been studied on copper oxide nanostructures such as thermal oxidation, hydrothermal [10,11], electrodeposition [12], template assisted [13], RF magnetron sputtering, plasma reduction [14]. Among these synthesis methods, the electrochemical method had a special significance for scientists because direct synthesis of Cu2O nanostructures has been complicated and needed some extra processes.…”

Effect of the solid precursors on the formation of nanosized TiBx powders in RF thermal plasma

“…Thermal plasmas have been mainly utilized in such processes, where the extremely high temperature that can reach several thousand degrees provides advantage to establish a more economical processing route [17][18][19][20][21][22]. In addition, it makes possible a continuous process and the ease of scaling up [23,24]. The main question is whether or not the residence times of solid precursors in the plasma enough for an in-flight reaction.…”

Synthesis and characterization of spherical amorphous alumo-silicate nanoparticles using RF thermal plasma method

“…It makes high-quality and highperformance materials and material processing techniques possible [1,2]. Moreover, the recent publications clearly showed that this synthesis method could be easily scaled up [3][4][5]. Plasma, considered the fourth state of matter, consists of a mixture of electrons, ions and neutral species, but is electrically neutral.…”