Now showing items 1-13 of 13

    • Adsorption of antipyrine by activated carbons from FeCl3-activation of Tara gum 

      Bedia, Jorge; Belver-Coldeira, Carolina; Ponce-Álvarez, Silvia; Rodríguez, Juan-Martín; Rodríguez, J. J. (Elsevier BVPaíses Bajos, 2018)
      Acceso restringido
      Activated carbons were synthesized by FeCl3-activation of Tara gum at different temperatures (400–1000 °C). The activating agent and the precursor were physically mixed at different ratios (r= FeCl3:precursor, 0.5–3.0 ...
    • Cellulose Microfibres Obtained from Agro-Industrial Tara Waste for Dye Adsorption in Water 

      Ponce-Álvarez, Silvia; Chavarría, María; Norabuena, Fiama; Chumpitaz, Dalton; Gutarra-Espinoza, Abel (SpringerCH, 2020)
      Acceso restringido
      Microfibres of cellulose were extracted from tara residues (TR), obtained after the production process, and used to remove dyes in aqueous solution. Caesalpinia spinosa (Molina) Kuntze or Tara spinosa, commonly known as ...
    • Effect of y-irradiation on the growth of ZnO nanorod films for photocatalytic disinfection of contaminated water 

      Alarcón, Julio; Ponce-Álvarez, Silvia; Paraguay-Delgado, Francisco; Rodríguez-Rodríguez, Juan (Academic PressEstados Unidos, 2011)
      Acceso restringido
      The growth of ZnO nanorods on a flat substrate containing c-irradiated seeds and their ability to photocatalytically eliminate bacteria in water were studied. The seed layer was obtained, by the spray pyrolysis technique, ...
    • Elimination of Escherichia coli in Water Using Cobalt Ferrite Nanoparticles: Laboratory and Pilot Plant Experiments 

      Gastelo, Elmer; Montes-de-Oca, Juan; Carpio-Deza, Edward; Espinoza, Juan; García, Pilar; Ponce-Álvarez, Silvia; Rodriguez, Juan-Martín (Multidisciplinary Digital Publishing InstituteSuiza, 2019)
      Acceso abierto
      This paper focuses on the synthesis of cobalt ferrite nanoparticles by the sol–gel method and their photocatalytic activity to eliminate bacteria in aqueous media at two di erent scales: in a laboratory reactor and a ...
    • Influence of Pyrolytic Seeds on ZnO Nanorod Growth Onto Rigid Substrates for Photocatalytic Abatement of Escherichia coli in water 

      Sánchez, Luis; Guz, Lucas; García, Pilar; Ponce-Álvarez, Silvia; Goyanes, Silvia; Marchi, María-Claudia; Candal, Roberto; Estrada, Walter; Rodríguez-Rodríguez, Juan (IWA PublishingReino Unido, 2014)
      Acceso restringido
      ZnO nanorods (ZnO NRs) were grown on ZnO seeded fluorine doped tin oxide (FTO) substrates at low temperatures (90 °C) from Zn2+ precursors in alkaline aqueous solution. The ZnO seeds were deposited on the FTO substrate ...
    • Study of the mechanical and energetic properties of pellets produce from agricultural biomass of quinoa, beans, oat, cattail and wheat 

      Alarcón, M.; Santos, C.; Cevallos, M.; Eyzaguirre-Pérez, Raúl; Ponce-Álvarez, Silvia (SpringerPaíses Bajos, 2017)
      Acceso restringido
      The lack of conventional fuels in rural areas in Peru drives people to burn agricultural wastes that are used as fuel. Burning these wastes produce a large amount of gaseous pollutants that harm the health of ...
    • Synthesis and Characterization of ZnO Nanorod Films on PET for Photocatalytic Disinfection of Water 

      Sánchez, Luis; Guz, Lucas; García, Pilar; Ponce-Álvarez, Silvia; Goyanes, Silvia; Marchi, María-Claudia; Candal, Roberto; Rodríguez-Rodríguez, Juan (Science & Technology Network, Inc.Canadá, 2015)
      Acceso abierto
      ZnO nanorods (ZnO NRs) were grown on ZnO seeded polyethylene tert-phtalate (PET) substrates obtained from recycled soda bottles at low temperatures (90 °C) from Zn2+ precursors in alkaline aqueous solution. The ZnO seeds ...
    • The role of seeding in the morphology and wettability of ZnO nanorods films on different substrates 

      Rodríguez-Rodríguez, Juan; Onna, Diego; Sánchez, Luis; Marchi, María-Claudia; Candal, Roberto; Ponce-Álvarez, Silvia; Bilmes, Sara A. (Elsevier BVPaíses Bajos, 2013)
      Acceso restringido
      Spray pyrolysis (SP) and spray-gel (SG) techniques were used to deposit ZnO seeds on Fluor doped tin oxide glasses (FTO), heated at 350 ¿C or 130 ¿C, and PET heated at 90 ¿C. The effect of seeding on the morphology and ...
    • TiO2 films on CoFe2O4 nanoparticles for the photocatalytic oxidation of rhodamine B: Influence of the alcoholic solutions 

      Gastello, Elmer; Estrada, David; Estrada, Walter; Luyo, Clemente; Espinoza, Juan; Ponce-Álvarez, Silvia; Montes-de-Oca, Juan; Acosta, Dwight-Roberto; Rodríguez, Juan-M. (SPIEEstados Unidos, 2019)
      Acceso restringido
      In the present work, photocatalytic oxidation of Rhodamine B solutions were performed using a composite material prepared by titanium dioxide films deposited onto cobalt ferrite nanoparticles. Cobalt ferrite nanoparticles ...
    • TiO2:Cex onto Al Clays for Photocatalytic Solar Water Disinfection 

      Belver, Carolina; Ponce-Álvarez, Silvia; Carpio, Edward A.; Salazar, G.; García, Pilar A.; Bedia, Jorge; Alvarez-Montero, M. A.; Rodriguez Jimenez, Juan J.; Rodríguez, Juan M. (HindawiGB, 2020)
      Acceso abierto
      A novel methodology was employed to prepare new nanocomposites with photocatalytic properties based on Ce-doped TiO2 nanoparticles arranged over a layered silicate. The catalysts were porous materials formed by exfoliated ...
    • Treatment of irrigation water infested with nematodes using a solar photoreactor 

      Inga López, Jesarella; Meza Contreras, Víctor; Rodríguez-Delfín, Alfredo; Ponce-Álvarez, Silvia; Paredes-Larroca, Fabricio-Humberto; Quino-Favero, Javier; Eyzaguirre-Pérez, Raúl; Saettone-Olschewski, Erich-Arturo (Desalination PublicationsEstados Unidos, 2020)
      Acceso restringido
      The objective of this study was to assess the efficacy of the disinfection of irrigation water loaded with the plant-parasitic nematode Meloidogyne incognita using a solar photoreactor. The photoreactor was comprised of a ...
    • Ultraviolet concentration factor of a truncated compound parabolic concentrator under different weather conditions 

      Saettone-Olschewski, Erich-Arturo; Paredes-Larroca, Fabricio-Humberto; Quino-Favero, Javier; Ponce-Álvarez, Silvia; Eyzaguirre-Pérez, Raúl (Pleiades PublishingRusia, 2020)
      Acceso restringido
      This study presents the results of ultraviolet radiation measurement in a truncated compound parabolic concentrator. The measurements were performed by using of a portable ultraviolet sensor both inside and outside the ...
    • ZnO (Ag-N) Nanorods Films Optimized for Photocatalytic Water Purification 

      Sanchez, Luis; Castillo, Carlos; Cruz, Willy; Yauri, Bryan; Sosa, Miguel; Luyo, Clemente; Candal, Roberto-Jorge; Ponce-Álvarez, Silvia; Rodríguez, Juan-M. (Multidisciplinary Digital Publishing InstituteSuiza, 2019)
      Acceso abierto
      ZnO nanorods (NRs) films, nitrogen-doped (ZnO:N), and ZnO doped with nitrogen and decorated with silver nanostructures (ZnO:N-Ag) NRs films were vertically supported on undoped and N doped ZnO seed layers by a wet chemical ...