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Phenol Abatement by Titanium Dioxide Photocatalysts: Effect of The Graphene Oxide Loading

1
Department of Chemistry and Bioscience, Aalborg University, 9220 Aalborg, Denmark
2
Dipartimento di Chimica, Universitá di Torino, 10125 Torino, Italy
3
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
4
Department of Physics and Nanotechnology, Aalborg University, 9220 Aalborg, Denmark
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(7), 947; https://doi.org/10.3390/nano9070947
Received: 29 April 2019 / Revised: 22 June 2019 / Accepted: 24 June 2019 / Published: 29 June 2019
(This article belongs to the Special Issue Sustainable and Safe Nano-Enabled Water Treatment Applications)
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Abstract

Hetero-photocatalytic graphene-TiO2 materials have, in the literature, been found to possess better photocatalytic activity for environmental applications compared to pure TiO2. These types of materials can be prepared in different ways; however, their photocatalytic performance and quality are not easily controlled and reproduced. Therefore, we synthetized graphene oxide-TiO2 nanoparticles by sol-gel reaction from TiCl4, as precursor, with two different methods of synthesis and with a graphene oxide (GO) loading ranging from 0 to 1.0. This approach led to a good adhesion of GO to TiO2 through the Ti-O-C bonding, which could enhance the photocatalytic performances of the materials. Overall, 0.05 wt % GO loading gave the highest rate in the photodegradation of phenol under visible light, while higher GO loadings had a negative impact on the photocatalytic performances of the composites. The 0.05 wt % GO-TiO2 composite material was confirmed to be a promising photocatalyst for water pollutant abatement. The designed synthetic approach could easily be implemented in large-scale production of the GO-TiO2 coupling materials. View Full-Text
Keywords: photocatalytic activity; water purification; TiO2; Graphene; reproducibility photocatalytic activity; water purification; TiO2; Graphene; reproducibility
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Naknikham, U.; Magnacca, G.; Qiao, A.; Kristensen, P.K.; Boffa, V.; Yue, Y. Phenol Abatement by Titanium Dioxide Photocatalysts: Effect of The Graphene Oxide Loading. Nanomaterials 2019, 9, 947.

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