Enhancement of absorbing frequency and photo-catalytic performance by temperature treatment of composites Fe3O4-AC nanoparticle

摘要

Structural and bonding characteristics of multifunction nanocomposite Fe3O4-activated carbon (Fe3O4-AC) for various annealing temperatures; 500 degrees C, 700 degrees C, and 900 degrees C have been studied by using X-ray diffraction (XRD) and Fourier transforms infrared spectroscopy (FTIR), respectively. Crystallite size and OAH bonds were decreases with increasing the annealing temperature. For electromagnetic (EM) properties from the Vector Network Analyzer (VNA) shows working frequency increases from 6 GHz to 6.8 GHz and the bandwidth widening increase up to 3.3 GHz with increasing the annealing temperature, and the reflection loss (RL) values for all composites in this study shows less than -10 dB indicated suitability for EM absorber. The photocatalytic ability was determined by using ultra violet visible (Uv-Vis) spectroscopy and methylene blue (MB) solution as a liquid waste test model. The stable annealing temperatures for absorber EM is 900 degrees C and for the photo-catalytic application is 500 degrees C. In this study shows temperature play an important role in stabilizing the performance of multifunction composite of Fe3O4-AC nanoparticle for EM absorber and for liquid waste purifying catalyst. (C) 2019 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.