Exploració per autor "Alvarez, Mayra G"

Ara es mostren els items 1-7 de 7

    • Direct growth of hydrotalcite nanolayers on carbon fibers by electrospinning 

      Modesto Lopez, Luis B; Chimentao, Ricardo J; Alvarez, Mayra G; Rosell Llompart, Joan; Medina Cabello, Francisco; Llorca Piqué, Jordi (2014-11-01)
      Article
      Accés restringit per política de l'editorial
      Hydrotalcite (HT) nanolayers have been grown directly on carbon fibers by carbonization and subsequent hydration of electrospun PVA/PEO/MgAl-nitrate fibers. The growth of the layered material was ascertained by X-ray ...

    • Enhanced photocatalytic degradation of methylene blue: Preparation of TiO2/reduced graphene oxide nanocomposites by direct sol-gel and hydrothermal methods 

      Atout, H.; Alvarez, Mayra G; Chebli, D.; Bouguettoucha, A.; Tichit, Didier; Llorca Piqué, Jordi; Medina Cabello, Francisco (2017-11)
      Article
      Accés obert
      In this study, two different preparation methods of titanium dioxide nanoparticles/reduced graphene oxide nanocomposites were investigated using direct sol-gel method followed by hydrothermal treatment or simple hydrothermal ...

    • Heterogeneous Fenton-like oxidation of p-hydroxybenzoic acid using Fe/CeO2-TiO2 catalyst 

      Hammedi, Tijani; Triki, Mohamed; Alvarez, Mayra G; Llorca Piqué, Jordi; Ghorbel, Abdelhamid; Ksibi, Zouhaier; Medina Mena, Francisco (2019-04-01)
      Article
      Accés obert
      This paper is built on the Fenton-like oxidation of p-hydroxybenzoic acid (p–HBZ) in the presence of H2O2 and 3%Fe supported on CeO2-TiO2 aerogels under mild conditions. These catalysts were deeply characterized by X-ray ...

    • Insights into palladium deactivation during advanced oxidation processes 

      Pinos Vélez, Verónica; Osegueda, O.; Crivoi, Dana-Georgiana; Llorca Piqué, Jordi; García García, Francisco Javier; Alvarez, Mayra G; Medina Cabello, Francisco; Dafinov, Antonio (American Chemical Society, 2022-09-28)
      Article
      Accés obert
      A key step in creating efficient and long-lasting catalysts is understanding their deactivation mechanism(s). On this basis, the behavior of a series of Pd/corundum materials during several hydrogen adsorption/desorption ...

    • Role of the synthesis route on the properties of hybrid LDH-graphene as basic catalysts 

      Alvarez, Mayra G; Tichit, Didier; Medina Cabello, Francesc; Llorca Piqué, Jordi (2017-02-28)
      Article
      Accés obert
      Layered double hydroxides (LDH or HT) or their derived mixed oxides present marked acid-base properties useful in catalysis, but they lead to agglomerate inducing a weak accessibility to the active sites. In this study we ...

    • Synthesis of tungsten carbide on Al-SBA-15 mesoporous materials by carburization 

      Alvarez, Mayra G; Chimentao, Ricardo J; Tichit, D.; Santos, Jeannette B O; Dafinov, Antonio; Modesto Lopez, Luis B; Rosell Llompart, Joan; Gueell, E. J.; Gispert Guirado, Francesc; Llorca Piqué, Jordi; Medina Mena, Francisco (2016-01-01)
      Article
      Accés obert
      Aluminum was incorporated into SBA-15 supports at molar ratios Si/Al = 10 and 2 by the pH-adjusting method. The calcined mesoporous Al-SBA-15 supports, as well as the Al-free SBA-15 support, were impregnated with ammonium ...

    • Total degradation of p-hydroxybenzoic acid by Ru-catalysed wet air oxidation: a model for wastewater treatment 

      Hammedi, Tijani; Triki, Mohamed; Alvarez, Mayra G; Chimentao, Ricardo J; Ksibi, Zouhaier; Ghorbel, Abdelhamid; Llorca Piqué, Jordi; Medina Mena, Francisco (2015-12-01)
      Article
      Accés obert
      Catalytic wet air oxidation using heterogeneous catalysts is a promising technology for treatment of wastewaters. Wastewaters from olive oil mills are difficult to clean because effluents contain high levels of phenolic ...