Copper NPs decorated titania: A novel synthesis by high energy US with a study of the photocatalytic activity under visible light |
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| Institution: | 1. University of Milan, Via Golgi 19, 20133 Milan, Italy;2. Consorzio INSTM, Firenze, Italy;3. University of Turin & NIS Inter-departmental Centre, Turin, Italy;4. National Technical University of Athens, School of Chemical Engineering, 15780 Athens, Greece;5. Clausthaler Zentrum für Materialtechnik, Agricola Str. 2, 38678 Clausthal-Zelelrfeld, Germany;6. CNR − Istituto di Scienze e Tecnologie Molecolari, Via C. Golgi 19, Milano 20133, Italy;7. GranitiFiandre SpA, Castellarano (MO), Italy;1. Institute of Physics, University of Belgrade, Belgrade, Serbia;2. Jožef Stefan Institute, Ljubljana, Slovenia;3. Institute of Nuclear Sciences “Vinča”, University of Belgrade, Belgrade, Serbia;1. Department of Energy, Environment and Indoor Climate, Danish Building Research Institute, Aalborg University, A.C. Meyers Vaenge 15, DK-2450 Copenhagen SV, Denmark;2. Danish Environmental Analysis (Dansk MiljøAnalyse), Skelstedet 5, DK- 2950 Vedbaek, Denmark;3. National Research Centre for the Working Environment, Lersø Parkalle 105, DK-2100 Copenhagen Ø, Denmark;1. Lund University, Department of Building and Environmental Technology, Division of Building Physics, Lund 221 00, Sweden;2. Lund University, Department of Building and Environmental Technology, Division of Building Services, Lund 221 00, Sweden;1. International Solar Energy Research Center (ISC), Rudolf-Diesel-Str. 15, 78467 Konstanz, Germany;2. Photovoltaik Institut Berlin AG, Wrangelstr. 100, 10977 Berlin, Germany;1. PV Technology Laboratory, FOSS Research Centre for Sustainable Energy, Department of Electrical and Computer Engineering, University of Cyprus, Nicosia 1678, Cyprus;2. Centre for Advanced Studies in Energy and Environment (CEAEMA), IDEA Solar Energy Research Group, Electronics and Automation Engineering Department, University of Jaén, Las Lagunillas Campus, Jaén 23071, Spain;3. Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh EH14 4AS, UK |
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| Abstract: | The most important drawback of the use of TiO2 as photocatalyst is its lack of activity under visible light. To overcome this problem, the surface modification of commercial micro-sized TiO2 by means of high-energy ultrasound (US), employing CuCl2 as precursor molecule to obtain both metallic copper as well as copper oxides species at the TiO2 surface, is here. We have prepared samples with different copper content, in order to evaluate its impact on the photocatalytic performances of the semiconductor, and studied in particular the photodegradation in the gas phase of some volatile organic molecules (VOCs), namely acetone and acetaldehyde. We used a LED lamp in order to have only the contribution of the visible wavelengths to the TiO2 activation (typical LED lights have no emission in the UV region). We employed several techniques (i.e., HR-TEM, XRD, FT-IR and UV–Vis) in order to characterize the prepared samples, thus evidencing different sample morphologies as a function of the various copper content, with a coherent correlation between them and the photocatalytic results. Firstly, we demonstrated the possibility to use US to modify the TiO2, even when it is commercial and micro-sized as well; secondly, by avoiding completely the UV irradiation, we confirmed that pure TiO2 is not activated by visible light. On the other hand, we showed that copper metal and metal oxides nanoparticles strongly and positively affect its photocatalytic activity. |
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| Keywords: | Ultrasound Copper NPs Visible light Photocatalysis VOC LED |
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