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Browsing by Author "Primo Arnau, Ana María"

Now showing items 1-20 of 70

111 oriented gold nanoplatelets on multilayer graphene as visible light photocatalyst for overall water splitting

Mateo Mateo, Diego; Esteve Adell, Iván; Albero Sancho, Josep; Sánchez Royo, Juan Francisco; Primo Arnau, Ana María; García Gómez, Hermenegildo (Nature Publishing Group, 2016-06-06)

[EN] Development of renewable fuels from solar light appears as one of the main current challenges in energy science. A plethora of photocatalysts have been investigated to obtain hydrogen and oxygen from water and solar ...
3D defective graphenes with subnanometric porosity obtained by soft-templating following zeolite procedures

Peng, Lu; Doménech-Carbó, Antonio; Primo Arnau, Ana Maria; García Gómez, Hermenegildo (The Royal Society of Chemistry, 2019-12-01)

[EN] By applying the well-known templating mechanism employed for the synthesis of mesoporous silicas to the structuration of sodium alginate, a novel defective 3D tubular graphene material (graphenolite) with hierarchical ...
3D defective graphenes with subnanometric porosity obtained by soft-templating following zeolite procedures

Peng, Lu; Domenech-Carbo, Antonio; Primo Arnau, Ana Maria; García Gómez, Hermenegildo (Royal Society of Chemistry, 2019-12-01)

[EN] By applying the well-known templating mechanism employed for the synthesis of mesoporous silicas to the structuration of sodium alginate, a novel defective 3D tubular graphene material (graphenolite) with hierarchical ...
A reliable procedure for the preparation of graphene-boron nitride superlattices as large area (cm x cm) films on arbitrary substrates or powders (gram scale) and unexpected electrocatalytic properties

Rendon-Patiño, Alejandra; Doménech, Antonio; García Gómez, Hermenegildo; Primo Arnau, Ana Maria (The Royal Society of Chemistry, 2019-02-14)

[EN] Herein, a reliable procedure for the preparation of graphene-boron nitride superlattices, either as films or powders, consisting of the pyrolysis at 900 degrees C of polystyrene embedded pre-formed boron nitride single ...
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 ...
Aqueous phase reforming of glycerol using doped graphenes as metal-free catalysts

Esteve-Adell, Iván; Crapart, Bertrand; Primo Arnau, Ana María; Serp, Philippe; García Gómez, Hermenegildo (The Royal Society of Chemistry, 2017)

[EN] Boron-doped graphene obtained by pyrolysis at 900 degrees C of the boric acid ester of alginate was found to be the most active graphene among a series of doped and co-doped graphenes to promote the aqueous phase ...
Basic zeolites containing palladium as bifunctional heterogeneous catalysts for the Heck reaction

Corma Canós, Avelino; García Gómez, Hermenegildo; Leyva Perez, Antonio; Primo Arnau, Ana Maria (Elsevier, 2003)

[EN] K+ and Cs+ exchanged X zeolite containing PdCl2 catalyzes the Heck reaction of PhI or PhBr with styrene in toluene or polymethylbenzenes without the need of extrinsic base. The reaction is truly heterogeneous and no ...
Bimetallic Oriented (Au/Cu2O) vs. Monometallic 1.1.1 Au (0) or 2.0.0 Cu2O Graphene-Supported Nanoplatelets as Very Efficient Catalysts for Michael and Henry Additions

Simion, Andrada; Candu, Natalia; Coman, Simona M.; Primo Arnau, Ana Maria; Esteve-Adell, Iván; Michelet, Veronique; Parvulescu, Vasile I.; García Gómez, Hermenegildo (John Wiley & Sons, 2018-12-02)

[EN] Michael and Henry addition reactions have been investigated using mono (Au and Cu2O) and bimetallic nanoplatelets (Au/Cu2O) grafted onto few-layers graphene (fl-G) films as heterogeneous catalysts by comparison with ...
Catalyst-free one step synthesis of large area vertically stacked N-doped graphene-boron nitride heterostructures from biomass source

Esteve-Adell, Iván; He, Jinbao; Ramiro Manzano, Fernando; Atienzar Corvillo, Pedro Enrique; Primo Arnau, Ana Maria; García Gómez, Hermenegildo (The Royal Society of Chemistry, 2018)

[EN] A procedure for the one-step preparation of films of few-layer N-doped graphene on top of nanometric hexagonal boron nitride sheets ((N)graphene/h-BN) based on the pyrolysis at 900 degrees C under an inert atmosphere ...
Chitosan-Templated Synthesis of Few-Layers Boron Nitride and its Unforeseen Activity as a Fenton Catalyst

Primo Arnau, Ana María; Navalón Oltra, Sergio; Asiri, Abdullah M; García Gómez, Hermenegildo (Wiley, 2015-01-02)

A novel procedure for the preparation of fewlayers boron nitride (BN), either as films or as suspended BN platelets, is presented, based on the pyrolysis of chitosan, which serves both as a matrix to embed ammonium borate ...
CO2 methanation catalyzed by oriented MoS2 nanoplatelets supported on few layers graphene

Primo Arnau, Ana Maria; He, Jinbao; Jurca, Bogdan; Cojocaru, Bogdan; Bucur, Cristina; Parvulescu, Vasile I.; García Gómez, Hermenegildo (Elsevier, 2019-05-15)

[EN] Powders of molybdenum disulfide platelets strongly grafted on graphene have been prepared by pyrolysis of ammonium alginate containing adsorbed various proportions of (NH4)(2)MoS4. After pyrolysis, formation of MoS2 ...
CO2-Fixation on Aliphatic alpha ,omega-Diamines to Form Cyclic Ureas, Catalyzed by Ceria Nanoparticles that were Obtained by Templating with Alginate

Primo Arnau, Ana María; Aguado, Eric; García Gómez, Hermenegildo (Wiley-VCH Verlag, 2013-04)

Ceria nanoparticles (average particle size: 8nm) have been obtained by the calcination of alginate aerogel beads that were precipitated from aqueous solutions of (NH4)2Ce(NO3)6. These nanoparticles were considerably more ...
Copper Nanoparticles Supported on Doped Graphenes as Catalyst for the Dehydrogenative Coupling of Silanes and Alcohols

Blandez Barradas, Juan Francisco; Primo Arnau, Ana María; Asiri, Abdullah; Alvaro Rodríguez, Maria Mercedes; García Gómez, Hermenegildo (Wiley-VCH Verlag, 2014-11-10)

[EN] Copper nanoparticles (NPs) supported on a series of undoped and doped graphene materials (Gs) have been obtained by pyrolysis of alginate or chitosan biopolymers, modified or not with boric acid, containing Cu2+ ...
Covalent functionalization of N-doped graphene by N-alkylation

Barrejon, M.; Primo Arnau, Ana Maria; Gomez-Escalonilla, M.J.; Fierro, Jose Luis G.; García Gómez, Hermenegildo; Langa, F. (The Royal Society of Chemistry, 2015)

[EN] Nitrogen doped graphene was modified by N-alkylation using a combination of phase transfer catalysis and microwave irradiation. The resulting derivatives of N-doped graphene were analysed showing that the bandgap of ...
Defective graphene as a metal-free catalyst for chemoselective olefin hydrogenation by hydrazine

Dhakshinamoorthy, Amarajothi; He, Jinbao; Franconetti, Antonio; Asiri, Abdullah M.; Primo Arnau, Ana Maria; García Gómez, Hermenegildo (The Royal Society of Chemistry, 2018-03-21)

[EN] A series of defective graphenes containing or not containing N, B, S and other heteroatoms exhibited general activity as metal-free catalysts for the hydrogenation of C=C double bonds by hydrazine in the presence of ...
Développement de nouveaux catalyseurs hétérogènes par modification de polymères issus de la biomasse

Frindy, Sana (Universitat Politècnica de València, 2018-02-27)

La siguiente tesis gira en torno al uso de biopolímeros renovables, ilustrado por la valorización de los residuos de cáscara de cáscara en el campo de la ciencia de los materiales y la catálisis y su tema se ocupa ...
Doped graphene as a metal-free carbocatalyst for the selective aerobic oxidation of benzylic hydrocarbons, cyclooctane and styrene

DHAKSHINAMOORTHY, AMARAJOTHI; Primo Arnau, Ana María; Concepción Heydorn, Patricia; Alvaro Rodríguez, Maria Mercedes; García Gómez, Hermenegildo (Wiley, 2013-06)

[EN] Nitrogen (N)-, boron (B)-, and boron,nitrogen (B,N)-doped graphene (G) act as carbocatalysts, promoting the aerobic oxidation of the benzylic positions of aromatic hydrocarbons and cyclooctane to the corresponding ...
Efficient and Highly Selective Aqueous oxidation of sulfides to sulfoxides at room temperature catalysed by supported iron oxide nanoparticles on SBA-15

Rajabi, Fatemeh; Naserian, Sareh; Primo Arnau, Ana María; Luque, Rafael (Wiley-VCH Verlag, 2011-07-22)

The present manuscript describes a simple, efficient and environmentally friendly room temperature aqueous catalytic approach to the selective preparation of sulfoxides from sulfides utilising lowloaded supported iron ...
Efficient visible-light photocatalytic water spilitting by minute amounts of golds supported on nanoparticulate CeO2 obtaines by a biopolymer templating method

Primo Arnau, Ana María; Marino, Tiziana; Corma Canós, Avelino; Molinari, Raffaele; García Gómez, Hermenegildo (American Chemical Society, 2011)

When irradiated with visible light (¿ > 400 nm) 1wt%gold-supported ceria nanoparticles generate oxygen from water (10.5 ¿mol 3 h 1)moreefficiently than the standardWO3 (1.7 ¿mol 3 h 1) even under UV irradiation (9.5 ¿mol ...
Engineering active sites on reduced graphene oxide by hydrogen plasma irradiation: mimicking bifunctional metal/supported catalysts in hydrogenation reactions

Primo Arnau, Ana Maria; Franconetti, Antonio; Magureanu, Monica; Mandache, Nicolae Bogdan; Bucur, Cristina; Rizescu, Cristina; Cojocaru, Bogdan; Parvulescu, Vasile I.; García Gómez, Hermenegildo (The Royal Society of Chemistry, 2018-06-07)

[EN] H2 plasma has been used to generate carbon vacancies on reduced graphene oxide to increase its catalytic activity as a hydrogenation catalyst. A relationship between the power of the plasma treatment and the exposure ...