Formation of Copper oxide II in polymer solution-blow-spun fibers and the successful non-woven ceramic production

TL;DR

This study demonstrates a simple, low-cost method to produce copper oxide II nanofibers using solution blow spinning and calcination, resulting in non-woven ceramic fabrics with potential semiconductor applications.

Contribution

It introduces a novel one-pot acetate route combined with solution blow spinning to synthesize CuO nanofibers efficiently and cost-effectively.

Findings

Successful fabrication of sub-300 nm CuO nanofibers

SEM shows smooth, granular fiber morphology

XRD confirms CuO formation before calcination

Abstract

Copper oxide II is a p-type semiconductor that can be used in several applications. Focusing on producing such material using an easy and low-cost technique, we followed an acetate one-pot-like route for producing a polymer precursor solution with different acetates:PVP (polyvinylpyrrolidone) weight ratios. Then, composite nanofibers were produced using the solution blow spinning (SBS) technique. The ceramic CuO samples were obtained after a calcination process at 600 oC for two hours, applying a heating rate of 0.5 oC/min. Non-woven fabric-like ceramic samples with average diameters lower than 300 nm were successfully obtained. SEM images show relatively smooth fibers with a granular morphology. XRD shows the formation of randomly oriented grains of CuO. In addition, FTIR and XRD analyses show the CuO formation before the heat treatment. Thus, a chemical reaction sequence was proposed to explain the results.