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   <ow:Publication rdf:about="oai:digibug.ugr.es:10481/88217">
      <dc:title>Graphene oxide based ultrafiltration membranes for photocatalytic degradation of organic pollutants in salty water</dc:title>
      <dc:creator>Pastrana Martínez, Luisa María</dc:creator>
      <dc:creator>Morales Torres, Sergio</dc:creator>
      <dc:creator>Figueiredo, José L.</dc:creator>
      <dc:creator>Faria, Joaquim L.</dc:creator>
      <dc:creator>Silva, Adrián M.T.</dc:creator>
      <dc:description>Flat sheet ultrafiltration (UF) membranes with photocatalytic properties were prepared with lab-made TiO2 and graphene oxide-TiO2 (GOT), and also with a reference TiO2 photocatalyst from Evonik (P25). These membranes were tested in continuous operation mode for the degradation and mineralization of a pharmaceutical compound, diphenhydramine (DP), and an organic dye, methyl orange (MO), under both near-UV/Vis and visible light irradiation. The effect of NaCl was investigated considering simulated brackish water (NaCl 0.5 g L−1) and simulated seawater (NaCl 35 g L−1). The results indicated that the membranes prepared with the GOT composite (M-GOT) exhibited the highest photocatalytic activity, outperforming those prepared with bare TiO2 (M−TiO2) and P25 (M-P25), both inactive under visible light illumination. The best performance of M-GOT may be due to the lower band-gap energy (2.9 eV) of GOT. In general, the permeate flux was also higher for M-GOT probably due to a combined effect of its highest photocatalytic activity, highest hydrophilicity (contact angles of 11°, 17° and 18° for M-GOT, M−TiO2 and M-P25, respectively) and higher porosity (71%). The presence of NaCl had a detrimental effect on the efficiency of the membranes, since chloride anions can act as hole and hydroxyl radical scavengers, but it did not affect the catalytic stability of these membranes. A hierarchically ordered membrane was also prepared by intercalating a freestanding GO membrane in the structure of the M-GOT membrane (M-GO/GOT). The results showed considerably higher pollutant removal in darkness and good photocatalytic activity under near-UV/Vis and visible light irradiation in continuous mode experiments.</dc:description>
      <dc:date>2024-02-05T08:38:36Z</dc:date>
      <dc:date>2024-02-05T08:38:36Z</dc:date>
      <dc:date>2015-06</dc:date>
      <dc:type>journal article</dc:type>
      <dc:identifier>Published version: Water Research Volume 77, 15 2015, Pages 179-190. https://doi.org/10.1016/j.watres.2015.03.014</dc:identifier>
      <dc:identifier>https://hdl.handle.net/10481/88217</dc:identifier>
      <dc:identifier>10.1016/j.watres.2015.03.014</dc:identifier>
      <dc:language>eng</dc:language>
      <dc:rights>http://creativecommons.org/licenses/by-nc-nd/4.0/</dc:rights>
      <dc:rights>open access</dc:rights>
      <dc:rights>Attribution-NonCommercial-NoDerivatives 4.0 Internacional</dc:rights>
      <dc:publisher>Elsevier</dc:publisher>
   </ow:Publication>
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