دراسة أثر المعالجة الحرارية على الألياف النانوية من أكسيد النحاس (CuO) المحضرة بطريقة الغزل الكهربائي

Abstract

In this research, we prepared copper oxide (CuO) nanofibers with a very high surface area-to-volume ratio using electrospinning. This technique is used to prepare organic and inorganic nanofibers with long lengths and uniform diameters. The spinning solution was prepared by mixing copper nitrate (NO3Cu) with water and PVA (polyvinyl alcohol) polymer. The nanofibers were produced by subjecting the spinning solution to static electricity using varying voltages up to 23 kV. These fibers were then assembled onto aluminum foil and glass slides. The nanofibers were then subjected to heat treatment by placing them in an oven at room temperature (35 °C), then at 200 °C to remove the polymer, and finally at 500 °C to remove all impurities and other materials. During the implementation of the experiment, the solution parameters, operation, and surrounding environment were taken into consideration. It was found that the prepared fibers have an energy gap of (e.v Eg= 3.2) at (35 °C) and the energy gap decreases to (e.v Eg= 1.8) with the heat treatment process at (500 °C). We also note the disappearance of the fluorescence peaks with the heat treatment process. Likewise, the structure of the wires was more consistent with the heat treatment process at (500 °C).