Now showing items 21-40 of 47

    • Hydrogen photochemical production in a microreactor with Au/TiO2 nanoparticles 

      Chausse Calbet, Victor (Universitat Politècnica de Catalunya, 2015-06-30)
      Bachelor thesis
      Open Access
      The major aim of this bachelor’s thesis is the production of hydrogen (H2) from mixtures containing water (H2O) & ethanol (EtOH) by means of a photocatalytic process using Au/TiO2 nanoparticles. The reaction was carried ...
    • Hydrogen photogeneration using ternary CuGaS2-TiO2-Pt nanocomposites 

      Caudillo Flores, Uriel; Kubacka, Anna; Berestok, Taisiia; Zhang, Ting; Llorca Piqué, Jordi; Arbiol, Jordi; Cabot, Andreu; Fernández García, Marcos (2020-01-13)
      Article
      Open Access
      In this contribution we synthesized ternary CuGaS2-TiO2-Pt materials. The semiconductor components were surface functionalized with mercapto-alifatic acids to drive their linking and were platinized prior to or after contact ...
    • Hydrogen photoproduction from ethanol-water mixtures over Au-Cu alloy nanoparticles supported on TiO2 

      Bonmatí i Lladó, Eduard; Casanovas Grau, Albert; Angurell Purroy, Inmaculada; Llorca Piqué, Jordi (2015-03-01)
      Article
      Open Access
      Au/TiO2, Au0.75Cu0.25/TiO2, Au0.5Cu0.5/TiO2 and Au0.25Cu0.75/TiO2 photocatalysts prepared from pre-formed Au and Au-Cu alloy nanoparticles of controlled composition and size were loaded over ceramic honeycombs (2 mg cm(-2)) ...
    • Hydrogen production with photocatalysts prepared by mechanochemical methods 

      Anadón Martínez, Verónica (Universitat Politècnica de Catalunya, 2020-07-09)
      Master thesis
      Open Access
      The objective of this thesis is to study the hydrogen production according to the preparation of photocatalysts with mechanochemical methods from semiconductors such as titanium dioxide. The preparation of the photocatalysts ...
    • In situ decolorization monitoring of textile dyes for an optimized UV-LED/TiO2 reactor 

      Tapia Tlatelpa, Tecilli; Trull Silvestre, José Francisco; Romeral Martínez, José Luis (2019-08-01)
      Article
      Open Access
      Heterogeneous photocatalysis, using photocatalysts in suspension to eliminate diverse contaminants, including textile wastewater, has several advantages. Nevertheless, current absorbance and decolorization measurements ...
    • Influence of Pt particle size and reaction phase on the photocatalytic performances of ultradispersed Pt/TiO2 catalysts for hydrogen evolution 

      Dessal, Caroline; Martínez, Lester; Maheu, Clément; Len, Thomas; Morfin, Franck; Rousset, Jean Luc; Puzenat, Eric; Afanasiev, Pavel; Aouine, Mimoun; Soler Turu, Lluís; Llorca Piqué, Jordi; Piccolo, Laurent (2019-07-01)
      Article
      Restricted access - publisher's policy
      Pt/TiO2 photocatalysts were prepared by incipient wetness impregnation followed by oxidative and/or reductive thermal treatments. By varying the TiO2 form (commercial P25 and P90, and homemade shape-controlled), the Pt ...
    • Macroporous silicon coated with M/TiO2 (M=Au,Pt) as a highly efficient photoreactor for hydrogen production 

      Serafin, Jaroslaw; Soler Turu, Lluís; Vega Bru, Didac; Rodríguez Martínez, Ángel; Llorca Piqué, Jordi (2020-03-07)
      Article
      Restricted access - publisher's policy
      Macroporous silicon disks containing ordered channels of 2 µm side and 0.2 mm length (9 × 106 channels cm-2) have been functionalized with a thin layer of Au/TiO2 and Pt/TiO2 photocatalysts and tested in the photoproduction ...
    • Methodology for lighting optimization applied to photocatalytic reactors 

      Tapia Tlatelpa, Tecilli; Trull Silvestre, José Francisco; Sala Caselles, Vicenç; Romeral Martínez, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Open Access
      Replacement of conventional UV-lamps used in photocatalytic reactors by UV-LED sources with lower energy consumption and larger versatility has been proposed recently; However, the implementation of these types of sources ...
    • Modelling and simulation of the photo-fenton process 

      De Haro Plana, Abel (Universitat Politècnica de Catalunya, 2018-10-30)
      Bachelor thesis
      Restricted access - author's decision
      El procés foto-fenton és un procés d'oxidació avançada que funciona bé per eliminar contaminants nocius presents a l'aigua. Intervenen forces reaccions i això fa que no sigui senzill de modelar, simular i optimitzar. En ...
    • Obtenció d'hidrogen a partir d'aigua i etanol amb fotocatalitza dors Au-M/TiO2 

      Bonmatí Roca, Eduard (Universitat Politècnica de Catalunya, 2014-10-15)
      Master thesis
      Open Access
    • Operando X-ray absorption spectroscopy investigation of photocatalytic hydrogen evolution over ultradispersed Pt/TiO2 catalysts 

      Piccolo, Laurent; Afanasiev, Pavel; Morfin, Franck; Len, Thomas; Dessal, Caroline; Rousset, Jean Luc; Aouine, Mimoun; Bourgain, Frédéric; Aguilar Tapia, Antonio; Proux, Olivier; Chen, Yufen; Soler Turu, Lluís; Llorca Piqué, Jordi (2020-11-06)
      Article
      Restricted access - publisher's policy
      Photocatalytic hydrogen generation from water or oxygenates is foreseen as a sustainable energy production route. In spite of recent performance achievements through Pt particle downsizing, knowledge of the prototypical ...
    • Pd/TiO2-WO3 photocatalysts for hydrogen generation from water-methanol mixtures 

      Toledo Camacho, Sandra Yurani; Rey Barroso, Ana; Hernández Alonso, María Dolores; Llorca Piqué, Jordi; Medina Mena, Francisco; Contreras Iglesias, Sandra (2018-10-15)
      Article
      Open Access
      Solar light is inexhaustible, and therefore to take advantage of this energy it is necessary to develop materials capable of absorbing energy in the widest range of the solar spectra. Although TiO2 is one of the most studied ...
    • Performance comparison of Ni/TiO2 and Au/TiO2 photocatalysts for H2 production in different alcohol-water mixtures 

      Chen, Wan-Ting; Chan, Andrew; Sun-Waterhouse, Dongxiao; Llorca Piqué, Jordi; Idriss, Hicham; Waterhouse, Geoffrey I.N. (2018-11-01)
      Article
      Restricted access - publisher's policy
      This study systematically compares the performance of 0.5¿wt% Ni/P25 TiO2 and 2¿wt% Au/P25 TiO2 photocatalysts for H2 production in alcohol-water mixtures under UV excitation. HRTEM, XANES and EXAFS confirmed the presence ...
    • Photocatalytic reduction of CO2 

      Torres Hurtado, Cristina (Universitat Politècnica de Catalunya / Slovenská Technická Univerzita V Bratislave, 2014)
      Bachelor thesis
      Open Access
      The concentration of CO2 in the atmosphere is nowadays a worldwide problem, because is one of the gases contributing to global warming. It is a fact that CO2 is increasing every time more and more in the atmosphere due to ...
    • Photocatalytic water splitting over Au/TiO2 nanoclusters 

      Miró Español, Maria (Universitat Politècnica de Catalunya, 2018-02-07)
      Bachelor thesis
      Open Access
      Developing a source of energy which is storable, clean, continuous and renewable is required to meet global energy demand and avoid the possible consequences of the climate change which may be irreversible. Hydrogen is an ...
    • Photocatalyzed hydrogen evolution from water by a composite catalyst of NH2-MIL-125(Ti) and surface nickel(II) species 

      Meyer, Kim; Bashir, Shahid; Llorca Piqué, Jordi; Idriss, Hicham; Ranocchiari, Marco; van Bokhoven, Jeroen A. (2016-09-01)
      Article
      Open Access
      A composite of the metal–organic framework (MOF) NH2-MIL-125(Ti) and molecular and ionic nickel(II) species, catalyzed hydrogen evolution from water under UV light. In 95 v/v¿% aqueous conditions the composite produced ...
    • Photoproduction of hydrogen in microreactors: catalytic coating or slurry configuration? 

      Chausse Calbet, Victor; Llorca Piqué, Jordi (2020-01-01)
      Article
      Restricted access - publisher's policy
      A quartz microreactor containing 28 microchannels of 500 µm width and 105 mm length has been used to photoproduce hydrogen from liquid water-ethanol using an Au/TiO2 photocatalyst and UV light. The photomicroreactor has ...
    • Porous NiTiO3/TiO2 nanostructures for photocatatalytic hydrogen evolution 

      Xing, Congcong; Liu, Yongpeng; Zhang, Yu; Liu, Junfeng; Zhang, Ting; Soler Turu, Lluís; Llorca Piqué, Jordi (Royal Society of Chemistry (RSC), 2019-01-01)
      Article
      Open Access
      We present a strategy to produce porous NiTiO3/TiO2 nanostructures with excellent photocatalytic activity toward hydrogen generation. In a first step, nickel-doped TiO2 needle bundles were synthesized by a hydrothermal ...
    • Preparation and photocatalytic activity of Au/TiO2 lyogels for hydrogen production 

      Martínez, Lester; Benito Vélez, Mónica; Mata, Ignasi; Soler Turu, Lluís; Molins, Elies; Llorca Piqué, Jordi (2018-01-01)
      Article
      Restricted access - publisher's policy
    • Reusable photocatalytic optical fibers for underground, deep-sea, and turbid water remediation 

      Teixeira, Sara; Magalhaes, Bruno; Martins, Pedro; Kühn, Klaus; Soler Turu, Lluís; Lanceros Méndez, Senentxu; Cuniberti, Gianaurelio (2018-02-21)
      Article
      Open Access
      An approach for underground, deep, and turbid water remediation is presented based on optical fibers with a photocatalytic coating. Thus, photocatalytic TiO2 P25 nanoparticles immobilized in a poly(vinylidene difluoride) ...