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Hybrid mesoporous silicas as platforms for the controlled synthesis of the metallic nanoparticle: relation between the nanostructuring and the catalytic activity

Grant number: 13/24400-8
Support type:Scholarships in Brazil - Master
Effective date (Start): March 01, 2014
Effective date (End): February 29, 2016
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal Investigator:Italo Odone Mazali
Grantee:João Paulo Vita Damasceno
Home Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:08/57867-8 - National Institute for Research, Development and Innovation in Functional Complex Materials, AP.TEM

Abstract

In processes that using heterogeneous catalysis stand out catalysts formed by metal nanoparticles because of their high surface area and catalytic activity, which are usually supported on a porous solid to provide stability and robustness. Many catalytic studies were and still are performed with systems based on metal nanoparticles supported, but there is not clear and comprehensive understanding of how nanostructuration affects the catalytic activity and how to control this activity from changes in the physicochemical properties of the catalysts. In order to contribute of some of these aspects will be synthesized some metals (Cu, Ni, Au, Pt e Pd) and their alloys nanoparticles in mesoporous silicas with ordered arrays of pores. The silicas SBA-15 and SBA-16 are synthesized and subsequently functionalized with an alkoxysilane ionic liquid derivative of the 1-methylimidazole. Then, we will explore the ability of ion exchange of the functionalized materials to promote interaction between the supports and the anionic metal complexes. Finally, the complexes will be reduced to obtain metallic or alloy nanoparticles inside the pores of silicas. The materials formed by nanoparticles supported will be tested for catalytic activity in order to evaluate the performance of each catalyst depending on the size, composition and morphology of the particles that compose it.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MARTINEZ, DIEGO S. T.; DAMASCENO, JOAO PAULO V.; FRANQUI, LIDIANE S.; BETTINI, JEFFERSON; MAZALI, ITALO O.; STRAUSS, MATHIAS. Structural aspects of graphitic carbon modified SBA-15 mesoporous silica and biological interactions with red blood cells and plasma proteins. Materials Science & Engineering C-Materials for Biological Applications, v. 78, p. 141-150, SEP 1 2017. Web of Science Citations: 2.
STRAUSS, MATHIAS; VITA DAMASCENO, JOAO PAULO; SIGOLI, FERNANDO APARECIDO; MAZALI, ITALO ODONE. Functionalization of Mesoporous Silicas as Strategy for Obtaining Nanocomposites with Controlled Graphitic Domains Quantity and Carbon Content. Journal of Nanoscience and Nanotechnology, v. 17, n. 4, p. 2804-2810, APR 2017. Web of Science Citations: 1.
VITA DAMASCENO, JOAO PAULO; MARONEZE, CAMILA MARCHETTI; STRAUSS, MATHIAS; SIGOLI, FERNANDO APARECIDO; MAZALI, ITALO ODONE. Preparation of supported AuPd nanoalloys mediated by ionic liquid-like functionalized SBA-15: structural correlations concerning its catalytic activity. NEW JOURNAL OF CHEMISTRY, v. 40, n. 8, p. 6636-6642, AUG 2016. Web of Science Citations: 13.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)

Please report errors in scientific publications list by writing to: cdi@fapesp.br.