Publicaciones 2011-2020

@article{RN396,
title = {Solid State Tuning of Tio2 Morphology, Crystal Phase, and Size through Metal Macromolecular Complexes and Its Significance in the Photocatalytic Response},
author = { P. Allende-Gonz\'{a}lez and M.A. Laguna-Bercero and L. Barrientos-Poblete and M.L. Valenzuela and C. Diaz},
url = {/brokenurl#<Go to ISI>://WOS:000458706000021},
doi = {10.1021/acsaem.8b00374},
issn = {2574-0962},
year = {2018},
date = {2018-01-01},
journal = {Acs Applied Energy Materials},
volume = {1},
number = {7},
pages = {3159-3170},
abstract = {A solid-state phase control of TiO2 by the use of different macromolecular complex precursors is reported for the first time. During the formation of TiO2 nanoparticles, chitosan and poly(styrene-co-4-vinylpyridine) polymers can act as solid-state template producing areas after carbonization, where the TiO2 nucleates. It seems that the location of metal centers through the polymeric chain (i.e., the distance between the metal centers) strongly influences the morphology and particle size of the photocatalyst. To demonstrate the application value of our different TiO2 structures, the photocatalytic behavior was explored. The efficient photocatalytic decoloration of methylene blue on different polymorphic forms of nanostructured TiO2 is confirmed. The best photocatalyst achieved a 98% discoloration rate in only 25 min when the pH of the solution was 9.5, improving the efficiency of the standard photocatalyst Degussa P25 without the addition of other phases or dopants. The novelty of the present work is that, by means of an appropriate synthesis, the three main factors (morphology, size, and crystalline phase) that allow modulating the photocatalytic response of titania material can be tuned simultaneously. This control has allowed an advance in the properties of the material, managing to increase the photoresponse in a short time.},
keywords = {anatase, morphology, nanocrystalline nanoparticles, organic particle-size, phase, photocatalysis, pollutants, rutile size solid-state synthesis, tio2 tio2, titanium-oxides},
pubstate = {published},
tppubtype = {article}
}

@article{RN298,
title = {Synthesis and Photocatalytic Activity of Hybrid Layered Zno(Myristic Acid)/Ag Nanoparticles},
author = { L. Diaz and S. Devis and C. Sotomayor and G. Gonz\'{a}lez and E. Benavente},
url = {/brokenurl#<Go to ISI>://WOS:000381540100003},
doi = {10.1016/j.matlet.2016.05.126},
issn = {0167-577x},
year = {2016},
date = {2016-01-01},
journal = {Materials Letters},
volume = {181},
pages = {8-11},
publisher = {2016 Elsevier B.V.},
abstract = {A new hybrid hetero nanocomposite, consisting of ZnO(myristic acid)/Ag-NPs, has been synthesized. The nanocomposite, made up of single ZnO nanosheets sandwiched between myristic acid self-assembled monolayers was synthesized and decorated with metal nanoparticles by chemical solution and tested in the photodegradation of methylene blue under UV light irradiation. The product displayed significant photocatalytic activity for degradation of the dye, and the activity was improved by a factor of three compared to bulk ZnO under similar conditions. The observed photodegradation efficiency is discussed in terms of the confinement of the semiconductor in the two dimensional structure, the adsorption ability of the organic component and the plasmonic absorption of Ag nanoparticles, which makes them act as electron wells, thus promoting charge separation and a reduced recombination rate.},
keywords = {equilibration, fermi-level irradiation, nanocomposites, nanoflakes, nanorods, nanowires, performance, photocatalysis, semiconductors, size uv, visible-light, zno},
pubstate = {published},
tppubtype = {article}
}

@article{RN93,
title = {Photocatalytic Thin Films Containing Tio2:N Nanopowders Obtained by the Layer-by-Layer Self-Assembling Method},
author = { L. Rojas-Blanco and M. Urz\'{u}a and R. Ramirez-Bon and F.J.E. Beltran},
url = {/brokenurl#<Go to ISI>://WOS:000298670300042},
doi = {10.1016/j.apsusc.2011.03.150},
issn = {0169-4332},
year = {2012},
date = {2012-01-01},
journal = {Applied Surface Science},
volume = {258},
number = {6},
pages = {2103-2106},
publisher = {2011 Elsevier B. V.},
abstract = {In this work, TiO2-N powders were synthesized by high-energy ball milling, using commercial titanium dioxide (TiO2) in the anatase phase and urea to introduce nitrogen into TiO2 in order to enhance their photocatalytic properties in the visible spectral region. Several samples were prepared by milling a mixture of TiO2-urea during 2, 4, 8, 12 and 24 h and characterized by spectroscopic and analytical techniques. X-ray diffraction (XRD) results showed the coexistence of anatase and high-pressure srilankite TiO2 crystalline phases in the samples. Scanning electron microscopy (SEM) revealed that the grain size of the powder samples decreases to 200 nm at 24 h milling time. UV-Vis diffuse reflectance spectroscopic data showed a clear red-shift in the onset of light absorption from 387 to 469 nm as consequence of nitrogen doping in the samples. The photocatalytic activity of the TiO2-N samples was evaluated by methylene blue degradation under visible light irradiation. It was found that TiO2-N samples had higher photocatalytic activity than undoped TiO2 samples, which could be assigned to the effect of introducing N atoms and XPS results confirm it. Using polyethylenimine (PEI), transparent thin films of TiO2-N nanoparticles were prepared by layer-by-layer self assembly method. UV-visible spectrophotometry was employed in a quantitative manner to monitor the adsorbed mass of TiO2 and PEI after each dip cycle. The adsorption of both TiO2 and PEI showed a saturation dip time of 15 min.},
keywords = {by degradation, doping, layer layer, nitrogen nitrogen-doped oxide, photocatalysis, photoelectrochemical properties, srilankite, tio2, titanium urea},
pubstate = {published},
tppubtype = {article}
}