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Listar por palabra clave "Photocatalysis"

Mostrando ítems 1-20 de 99

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2D/2D Cu-tetrahydroxyquinone MOF/N-doped graphene heterojunction as photocatalyst for overall water splitting

Szalad, Horatiu; Uscategui-Linares, Andrés Felipe; Albero-Sancho, Josep; García Gómez, Hermenegildo (Elsevier, 2023-03)

[EN] A novel 2D/2D heterojunction (CuTHQ/NG) has been prepared by in situ growth of the 2D CuTHQ MOF on defective N-doped graphene (NG), and its photocatalytic activity for overall water splitting studied in detail. CuTHQ/NG ...
3D Structured Graphenes as (Photo)Catalysts

García Mulero, Ana (Universitat Politècnica de València, 2023-03-20)

[ES] En la actualidad, el elevado consume energético y el aumento de la concentración de CO2 en la atmósfera han hecho necesaria la búsqueda de nuevas opciones para los procesos actuales. Una respuesta ha sido el aprovechamiento ...
A comparative photocatalytic study of TiO2 loaded on three natural clays with different morphologies

Wu, Aichun; Wang, Duoxiao; Wei, Chao; Zhang, Xudong; Liu, Zhangsheng; Feng, Peizhong; Ou, Xuemei; Qiang, Yinghuai; García Gómez, Hermenegildo; Niu, Jinan (Elsevier, 2019-12-15)

[EN] In this work, a sol-gel method was used to load TiO2 nanoparticles on three clays (kaolinite, halloysite and palygorskite) with different morphologies (plates, tubes, and rods with micro tunnels), and then the ...
A Heterogeneous Carbon Nitride Nickel Photocatalyst for Efficient Low-Temperature CO2 Methanation

Barrio, Jesus; Mateo-Mateo, Diego; Albero-Sancho, Josep; García Gómez, Hermenegildo; Shalom, Menny (John Wiley & Sons, 2019-11-27)

[EN] The Sabatier reaction, i.e., the hydrogenation of CO2 to methane (CH4) using hydrogen (H-2), constitutes a potentially scalable method to store energy in a product with a high energy density. However, up to today, ...
A photophysical approach to investigate the photooxidation mechanism of pesticides: Hydroxyl radical versus electron transfer

Marín García, Mª Luisa; Lhiaubet, Virginie Lyria; Santos-Juanes Jordá, Lucas; Soler Escoda, Juan Miguel; Gomis Vicens, Juan; Arques Sanz, Antonio; Amat Payá, Ana María; Miranda Alonso, Miguel Ángel (Elsevier, 2011-03-14)

[EN] The role of hydroxyl radical in different solar photocatalytic processes, namely photo-Fenton, titanium dioxide-based oxidation and organic photocatalysis (triphenylpyrylium) has been investigated. Using a methodology ...
A simple method to fabricate high-performance nanostructured WO3 photocatalysts with adjusted morphology in the presence of complexing agents

Fernández Domene, Ramón Manuel; Sánchez Tovar, Rita; Lucas-Granados, Bianca; Roselló-Márquez, Gemma; Garcia-Anton, Jose (Elsevier, 2017)

[EN] The rich and complex chemistry of tungsten was employed to synthesize innovative WO3 nanoplatelets/nanosheets by simple anodization in acidic electrolytes containing different concentrations of complexing agents or ...
Alginate as template in the preparation of active titania photocatalysts

Buaki-Sogo, Mireia; Serra, Marco; Primo Arnau, Ana María; Alvaro Rodríguez, Maria Mercedes; García Gómez, Hermenegildo (WILEY-VCH Verlag GmbH & Co. KGaA,, 2012)

[EN] A simple and reliable procedure to prepare TiO2 and Au/TiO2 samples with high photocatalytic activity for hydrogen generation from water/methanol mixtures is reported, which uses natural alginate as the templating ...
Band Engineering of Semiconducting Microporous Graphitic Carbons by Phosphorous Doping: Enhancing of Photocatalytic Overall Water Splitting

Garcia-Mulero, Ana; Rendón-Patiño, Alejandra; Asiri, Abdullah M.; Primo Arnau, Ana Maria; García Gómez, Hermenegildo (American Chemical Society, 2021-10-20)

[EN] Carbon-based solar photocatalysts for overall water splitting could provide H2 as an energy vector in a clean and sustainable way. Band engineering to align energy levels can be achieved, among other ways, by doping. ...
Catalysis at the Heart of Success!

Bornscheuer, Uwe T.; Hashmi, A. Stephen K.; García Gómez, Hermenegildo; Rowan, Michael A. (John Wiley & Sons, 2017)
Comparison of different TiO2 samples as photocatalyst for the degradation of a mixture of four commercial pesticides

Vicente Candela, Rafael; Soler Escoda, Juan Miguel; Arques Sanz, Antonio; Amat Payá, Ana María; Frontistis, Z.; Xekoukoulotakis, Nikolaos; Mantzavinos, Dionissios (Wiley, 2014-08)

BACKGROUND: The presence of pesticides in surface and ground waters can trigger serious environmental problems, particularly in those areas where agriculture is the major economic activity. In this respect, photochemical ...
Constrasting photocatalytic activity of commercial TiO2 samples for hydrogen generation

Montes Navajas, Pedro Manuel; Serra, Marco; Corma Canós, Avelino; García Gómez, Hermenegildo (Elsevier, 2014-04-15)

series of 20 commercial titanium dioxide samples, including Evonik P-25, Millenium, Huntsman,Crenox, Kronnos or Hombikat, have been tested as photocatalysts for hydrogen generation from wateror water/methanol mixtures under ...
Copper-doped titania photocatalysts for simultaneous reduction of CO2 and production of H-2 from aqueous sulfide

Gonell-Gómez, Francisco; Puga Vaca, Alberto; Julián López, Beatriz; García Gómez, Hermenegildo; Corma Canós, Avelino (Elsevier, 2016-01)

Copper-doped titanium dioxide materials with anatase phase (Cu-TiO2, atomic Cu contents ranging from 0 to 3% relative to the sum of Cu and Ti), and particle sizes of 12-15 nm, were synthesised by a solvo-thermal method ...
Core-shell Bi-containing spheres and TiO2 nanoparticles co-loaded on kaolinite as an efficient photocatalyst for methyl orange degradation

Li, Chen; Sun, Li; Niu, Jinan; Reka, Arianit A.; Feng, Peizhong; García Gómez, Hermenegildo (Elsevier, 2023-02)

[EN] Improving the efficiency/cost ratio is the key to the practical application of photocatalysts. Using cheap minerals as carriers is an effective means to improve the efficiency/cost ratio of photocatalysts. Here, ...
Deep UV photocatlytic activation of ethane on silica surfaces

Sastre Calabuig, Francesc; Corma Canós, Avelino; García Gómez, Hermenegildo (Elsevier, 2012-11-30)

Deep UV photolysis (165 or 185 nm) of surface silanol groups leads to the homolytic Osingle bondH bond breaking, generating silyloxyl radicals and hydrogen atoms. Silyloxyl radicals are able to activate ethane through ...
Depuración de aguas contaminadas con plaguicidas empleados en cultivos de caña de azúcar en Colombia

García Ortiz, Jorge (Universitat Politècnica de València, 2014-02-17)

[ES] Este proyecto tiene como objetivo general el estudio de la mejora en la calidad del agua en zonas agrícolas de Colombia, especialmente en zonas donde se cultiva la caña de azúcar como principal fuente de riqueza de ...
Desarrollo y estudio de diferentes tipos de tejidos autolimpiantes mediante la aplicación de TiO2 por impregnación y nanoburbujas

Herrero Monzón, Ana (Universitat Politècnica de València, 2019-10-24)

[ES] Desarrollo y estudio del efecto autolimpiante en manchas a diferente pH sobre diferentes tejidos 100% de algodón autolimpiantes elaborados mediante la aplicación de dióxido de titanio (TiO2) en forma de acabado. Los ...
Detoxificación por fotocatálisis solar de efl uentes cianurados provenientes de una industria metalúrgica

Silvestre Mira, María; Vercher Pérez, Rosa Francisca; Palacios Guillem, Santiago; Arques Sanz, Antonio; Amat Payá, Ana María; Añó Montalvá, Enrique José (Federación de Asociaciones de Ingenieros Industriales de España (FAIIE), 2012)

[En] Wastewaters from metal fi nishing industry contain, among other pollutants, high amounts of cyanide and heavy metals, which results in a high toxicity of the effl uent. Therefore, it is necessary to detoxify the ...
Diseño y síntesis de nuevos fotocatalizadores para el tratamiento de aguas residuales

Cabezuelo Gandía, Oscar (Universitat Politècnica de València, 2024-09-02)

[ES] Las tecnologías convencionales para el tratamiento de aguas contaminadas no logran abordar la eliminación de contaminantes de preocupación emergente (CECs), lo que subraya la necesidad de implementar nuevas estrategias ...
Dyes decolorization using silver nanoparticles supported on nanometric diamond as highly efficient photocatalyst under natural Sunlight irradiation

Manickam-Periyaraman, Premkumar; Espinosa, Sergio Manuel; Espinosa-López, Juan Carlos; Navalón Oltra, Sergio; Subramanian, Sivanesan; Alvaro Rodríguez, Maria Mercedes; García Gómez, Hermenegildo (Elsevier, 2016)

[EN] Herein we report that silver nanoparticles supported on commercial diamond nanoparticles functionalized with hydroxyl groups (D3) is a cost-effective heterogeneous catalyst for the decolorization of different synthetic ...
El cobre como fotocatalizador en procesos de catálisis homogénea en aguas altamente salinas

Orts Beneito, Xavier (Universitat Politècnica de València, 2022-09-13)

[ES] La escasez de agua y la contaminación de grandes cuerpos hídricos por sustancias emergentes justifican la necesidad de desarrollar nuevos métodos de tratamiento de aguas. En los últimos años, procesos de oxidación ...