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
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Revised: 22 June 2019
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Accepted: 24 June 2019
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Published: 29 June 2019
(This article belongs to the Special Issue Sustainable and Safe Nano-Enabled Water Treatment Applications)
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.
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Keywords:
photocatalytic activity; water purification; TiO2; Graphene; reproducibility
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MDPI and ACS Style
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. https://doi.org/10.3390/nano9070947
AMA Style
Naknikham U, Magnacca G, Qiao A, Kristensen PK, Boffa V, Yue Y. Phenol Abatement by Titanium Dioxide Photocatalysts: Effect of The Graphene Oxide Loading. Nanomaterials. 2019; 9(7):947. https://doi.org/10.3390/nano9070947
Chicago/Turabian StyleNaknikham, Usuma, Giuliana Magnacca, Ang Qiao, Peter K. Kristensen, Vittorio Boffa, and Yuanzheng Yue. 2019. "Phenol Abatement by Titanium Dioxide Photocatalysts: Effect of The Graphene Oxide Loading" Nanomaterials 9, no. 7: 947. https://doi.org/10.3390/nano9070947
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