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{RN144,
title = {Solution and Surfactant-Free Growth of Supported High Index Facet Sers Active Nanoparticles of Rhenium by Phase Demixing},
author = { C. Diaz and M.L. Valenzuela and S. Caceres and C. O'dwyer},
url = {/brokenurl#<Go to ISI>://WOS:000314640100008},
doi = {10.1039/c2ta00262k},
issn = {2050-7488},
year = {2013},
date = {2013-01-01},
journal = {Journal of Materials Chemistry A},
volume = {1},
number = {5},
pages = {1566-1572},
abstract = {Stable, high-index facet Re nanoparticles have been grown by a solid state synthetic method, negating the need for solutions or surfactants to control seeding, supracrystallization and NP shape. By using mixtures of K[ReO4] and the cyclic triphosphazene [NP(O2C12H8)](3), high-index facet nanoparticles and nanocrystals similar to 3 nm in size can be seeded and grown from drop-cast films and powders due to phase demixing of the metallopolymer. NP dispersions are formed directly within a carbon support that liquefies, allowing NP coarsening and ripening, and the eventual formation of a solidified graphitic support filled with crystals. Successful growth of mesoscale supracrystals of Re also occurs from ripening of nucleated NP seeds, incubated within a solidified and partially dewetted solid support that patterns the surface. The supported Re NP dispersions also exhibit surface enhanced Raman scattering within a graphitic matrix.},
keywords = {excitation gold graphene, morphology, nanocatalysts, nanocrystals, nanoparticles, precursors},
pubstate = {published},
tppubtype = {article}
}

@article{RN32i,
title = {Nanostructured Vox/Vo(Po4)(N) Using Solid-State Vanadium Containing Phosphazene Precursors: A Useful Potential Bi-Catalyst System},
author = { C. Diaz and M.L. Valenzuela and N. Yutronic and V. Villalobos and G. Barrera},
url = {/brokenurl#<Go to ISI>://WOS:000297250000012},
doi = {10.1007/s10876-011-0415-1},
issn = {1040-7278},
year = {2011},
date = {2011-01-01},
journal = {Journal of Cluster Science},
volume = {22},
number = {4},
pages = {693-704},
abstract = {Pyrolysis of molecular precursors containing vanadium organometallic and cyclic phosphazene affords mixtures of nanostructured vanadium oxides and pyrophosphates. The products from the molecular precursor [N3P3(OC6H5)(5)OC5H4N center dot Cp2VCl][PF6], and of the mixtures Cp2VCl2/N3P3(OC6H4CHO)(6) and Cp2VCl2/[NP(O2C12H8)](3) in several relationships 1:1, 1:3, 1:5 and 1:10, pyrolyzed under air and at 400 A degrees C and 600 A degrees C, give mixtures mainly V2O5 and VO(PO3)(2). Varied morphologies depending on the molecular or mixture precursors and of the temperature used were observed. Nanowires with diameters of approximate 40 nm were observed for the 1:5 Cp2VCl2/[NP(O2C12H8)](3) mixture pyrolyzed at 400 A degrees C, while the same mixture pyrolyzed at 600 A degrees C, affords xerogels of V2O5. The products were characterized by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), infra-red (IR) spectroscopy and X-ray diffraction (XRD). The preparation method constitutes a novel one-pot solid-state way to nanostructured materials with potential applications both in oxidative dehydrogenation of light hydrocarbons with V2O5, as well as alkenes oxidations with VO(PO3)(2).},
keywords = {autogenic cyclophosphazenes, derivatives, electrochemical elevated-temperature, gold, morphology, nanofibres nanoparticles, organometallic polyphosphazenes, pressure, properties, pyrolysis, template, vanadium},
pubstate = {published},
tppubtype = {article}
}