Nickel ferrite nanoenabled graphene oxide (NiFe 2 O 4 @GO) as photoactive nanocomposites for water treatment
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RESEARCH ARTICLE
Nickel ferrite nanoenabled graphene oxide (NiFe2O4@GO) as photoactive nanocomposites for water treatment Allen Rhay B. Bayantong 1 & Yu-Jen Shih 2 & Cheng-Di Dong 3 & Sergi Garcia-Segura 4 & Mark Daniel G. de Luna 1,5 Received: 5 February 2020 / Accepted: 16 August 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Nanocomposite materials can enhance the capabilities of water treatment processes such as photocatalysis. In this work, novel light-driven nanocatalysts were synthesized by using nickel ferrite (NiFe2O4) to nanoenable graphene oxide (GO) substrates. GO is an emerging 2D nanomaterial with high conductivity and adsorption properties. Moreover, the electric properties of GO improve photocatalytic performance by promoting charge carrier separation. Results of the characterization of the nickel ferrite nanoenabled graphene oxide (NiFe2O4@GO) nanocomposites demonstrate that homogeneous and stable photocatalysts were produced. The as-synthesized nanocatalysts enabled complete decolorization of the colored water matrix in short irradiation times of 150 min using minimal catalyst loading at 0.5 g L−1. The selective hook and destroy mechanism reduced the competitive effect of co-existing ions in solution. Furthermore, the use of specific scavengers helped to elucidate the degradation mechanisms of organic dye methylene blue by NiFe2O4@GO nanocomposites. Keywords Advanced oxidation process . Graphene nanocomposite . Photocatalysis . UV irradiation . Wastewater treatment
Introduction Textile manufacturing is a water-intensive process that consumes over 200 kg of water per kg of fabric produced. In particular, the dying process for fabrics requires large volumes of water which result in the release of colored effluents
(Brillas and Martínez-Huitle 2015). Green manufacturing processes should consider approaches that reduce the production of wastewater effluents while enabling water reuse strategies (Mansour et al. 2018). Idiosyncrasies of manufacturing countries must be considered when evaluating water reuse technologies to be adopted. Mid-sized textile industries in developing
Highlights • Nickel ferrite nanoenabled graphene oxide catalysts were synthesized. • The hook and destroy approach improved degradation performance. • Photogenerated holes and hydroxyl radicals were identified as main oxidants. Responsible editor: Sami Rtimi * Cheng-Di Dong [email protected] * Mark Daniel G. de Luna [email protected] 1
Environmental Engineering Program, National Graduate School of Engineering, University of the Philippines Diliman, 1101 Quezon City, Philippines
2
Institute of Environmental Engineering, National Sun Yat-sen University, Kaohsiung City 81157, Taiwan
3
Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan
4
Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe,
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