Synthesis of ZnO/ZnFe2O4 nanocomposites in organic-free media and their photocatalytic activity under natural sunlight

  • Rahmayeni Rahmayeni Department of Chemistry, Faculty of Mathematic and Natural Sciences, Andalas University, 25163, Padang, Indonesia Phone:+6281363100506
  • Zulhadjri Zulhadjri Department of Chemistry, Faculty of Mathematic and Natural Sciences, Andalas University, 25163, Padang, Indonesia Phone:+6281363100506
  • Yeni Stiadi Department of Chemistry, Faculty of Mathematic and Natural Sciences, Andalas University, 25163, Padang, Indonesia Phone:+6281363100506
  • Agusnar Harry Department of Chemistry, Faculty of Mathematic and Natural Sciences, Universitas Sumatera Utara, 20155, Medan, Indonesia
  • Syukri Arief Department of Chemistry, Faculty of Mathematic and Natural Sciences, Andalas University, 25163, Padang, Indonesia Phone:+6281363100506
Keywords: ZnO/ZnFe2O4, photocatalyst, organic-free media, natural sunlight, paramagnetic

Abstract

Nanocomposite ZnO/ZnFe2O4 photocatalysts with different proportions of ZnFe2O4 were synthesized in organic-free media using metal nitric as precursors. The ZnO phase with hexagonal wurtzite structure and low crystallinity of ZnFe2O4 was confirmed using XRD (X-Ray diffraction). Different morphologies of the nanocomposites were obtained ranging from rice grain-like with a porous surface to homogeneous sphere-like nanoparticles as shown in Scanning Electron Microscopy (SEM) and TEM Transmission Electron Microscopy (TEM) studies. Magnetic properties measured by Visible Sampler Magnetometer (VSM) showed diamagnetic and paramagnetic behavior for the nanocomposites. Analysis with Diffuse Reflectance Spectrophotometer (DRS) UV-vis showed an increase the composition of ferrite in composites increasing its ability to absorb visible light. Photocatalytic activities of ZnO/ZnFe2O4 nanocomposites on the degradation of Rhodamine B dye reached 95.6% after 3 h under natural sunlight suggesting their suitability for sunlight driven photocatalytic applications. 

Published
2020-06-22
How to Cite
Rahmayeni, R., Zulhadjri, Z., Stiadi, Y., Harry, A., & Arief, S. (2020). Synthesis of ZnO/ZnFe2O4 nanocomposites in organic-free media and their photocatalytic activity under natural sunlight. Journal of Mechanical Engineering and Sciences, 14(2), 6801 - 6810. https://doi.org/10.15282/jmes.14.2.2020.20.0532
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Article