64413 20190709135703.0 doi 10.1021/acsami.7b11482 sideral 103547 ART-2017-103547 eng Miguel-Sancho, N. Pumping Metallic Nanoparticles with Spatial Precision within Magnetic Mesoporous Platforms: 3D Characterization and Catalytic Application 2017 Access copy available to the general public Unrestricted The present work shows an efficient strategy to assemble two types of functional nanoparticles onto mesoporous MCM-41 silica nanospheres with a high degree of spatial precision. In a first stage, magnetite nanoparticles are synthesized with a size larger than the support pores and grafted covalently through a peptide-like bonding onto their external surface. This endowed the silica nanoparticles with a strong superparamagnetic response, while preserving the highly ordered interior space for the encapsulation of other functional guest species. Second, we report the finely controlled pumping of preformed Pt nanoparticles (1.5 nm) within the channels of the magnetic MCM-41 nanospheres to confer an additional catalytic functionality to the multiassembled nanoplatform. The penetration depth of the metallic nanoparticles can be explained as a result of the interplay between the particle-wall electrostatic attraction and the repulsive forces between neighboring Pt nanoparticles. A detailed transmission electron microscopy and a 3D high-resolution high-angle annular dark-field detector electron tomography study were carried out to characterize the material and to explain the assembly mechanism. Finally, the performance of these multifunctional nanohybrids as magnetically recoverable catalysts has been evaluated in the selective hydrogenation of p-nitrophenol, a well-known pollutant and intermediate in multiple industrial processes. info:eu-repo/grantAgreement/ES/MINECO/MAT2016-79776-P info:eu-repo/grantAgreement/EC/FP7/321642/EU/Development of a microfluidic platform to produce nanomaterials and assessment on new nanotechnology applications/PLATFORM2NANO info:eu-repo/grantAgreement/EC/FP7/294094/EU/Synthesis and characterization of NANOstructured materials with LumInescent properties for diaGnostic and tHerapeuTic applications/NANOLIGHT info:eu-repo/grantAgreement/ES/DGA/E26 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 8.097 2017 NANOSCIENCE & NANOTECHNOLOGY 15 / 92 = 0.163 2017 Q1 T1 MATERIALS SCIENCE, MULTIDISCIPLINARY 26 / 285 = 0.091 2017 Q1 T1 2.784 2017 Materials Science (miscellaneous) 2017 Q1 Nanoscience and Nanotechnology 2017 Q1 Medicine (miscellaneous) 2017 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion (orcid)0000-0001-7872-6301 Martinez, G. Universidad de Zaragoza Sebastian, V. Malumbres, A. Florea, I. (orcid)0000-0002-2071-9093 Arenal, R. Universidad de Zaragoza (orcid)0000-0001-5835-1223 Ortega-Liebana, M.C. Universidad de Zaragoza (orcid)0000-0002-4546-4111 Hueso, J.L. (orcid)0000-0002-8701-9745 Santamaria, J. Universidad de Zaragoza 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 9, 47 (2017), 41529-41536 ACS appl. mater. interfaces ACS Applied Materials & Interfaces 1944-8244 1050751 http://zaguan.unizar.es/record/64413/files/texto_completo.pdf Postprint 43864 http://zaguan.unizar.es/record/64413/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:64413 articulos driver 2019-07-09-12:50:50 ARTICLE