Pumping Metallic Nanoparticles with Spatial Precision within Magnetic Mesoporous Platforms: 3D Characterization and Catalytic Application

Miguel-Sancho, N. ; Martinez, G. (Universidad de Zaragoza) ; Sebastian, V. ; Malumbres, A. ; Florea, I. ; Arenal, R. (Universidad de Zaragoza) ; Ortega-Liebana, M.C. (Universidad de Zaragoza) ; Hueso, J.L. ; Santamaria, J. (Universidad de Zaragoza)

Resumen: 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.

Idioma: Inglés

DOI: 10.1021/acsami.7b11482

Año: 2017

Publicado en: ACS Applied Materials & Interfaces 9, 47 (2017), 41529-41536
ISSN: 1944-8244

Factor impacto JCR: 8.097 (2017)

Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 15 / 92 = 0.163 (2017) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 26 / 285 = 0.091 (2017) - Q1 - T1

Factor impacto SCIMAGO: 2.784 - Materials Science (miscellaneous) (Q1) - Nanoscience and Nanotechnology (Q1) - Medicine (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E26
Financiación: info:eu-repo/grantAgreement/EC/FP7/294094/EU/Synthesis and characterization of NANOstructured materials with LumInescent properties for diaGnostic and tHerapeuTic applications/NANOLIGHT
Financiación: info:eu-repo/grantAgreement/EC/FP7/321642/EU/Development of a microfluidic platform to produce nanomaterials and assessment on new nanotechnology applications/PLATFORM2NANO
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2016-79776-P

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)