title: Synthesis of mesoporous silica with embedded nickel nanoparticles for catalyst applications.
abstract: Here we describe a new route for the synthesis of nanometric Ni particles embedded in a mesoporous silica material with excellent potential for catalytic applications. Mesoporous silica with a surface area in the range of 202-280 m2/g, with narrow pore size distribution and Ni nanoparticles (particles in the range of 3-41 nm) were obtained in a direct process. A different approach was adopted to process such a nanocomposite. This new approach is based on the formation of a polymer with the silicon oxianion and nickel cation chelated to the macromolecule structure and on the control of the pyrolysis step. The CO/CO2 atmosphere resulting from the pyrolysis of the organic material promotes the reduction of the Ni citrate.
authors.affiliation: CMDMC-LIEC, Department of Chemistry, UFSCar, Via Washington Luiz, Km 235, C.P. 676-CEP 13565-905, São Carlos, SP.
authors.forename: E R
authors.initials: ER
authors.lastname: Leite
authors.forename: N L
authors.initials: NL
authors.lastname: Carreño
authors.forename: E
authors.initials: E
authors.lastname: Longo
authors.forename: A
authors.initials: A
authors.lastname: Valentini
authors.forename: L F
authors.initials: LF
authors.lastname: Probst
mesh_terms: D000081008:Bicyclic Monoterpenes; D002384:Catalysis; D003460:Crystallization / Q000379:methods*; D005782:Gels / Q000737:chemistry; D006358:Hot Temperature; D046911:Macromolecular Substances; D008422:Materials Testing; D000432:Methanol / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D009532:Nickel / Q000737:chemistry*; D010316:Particle Size; D016062:Porosity; D012822:Silicon Dioxide / Q000138:chemical synthesis / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature; D013729:Terpenes / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D000081008:Bicyclic Monoterpenes; D005782:Gels; D046911:Macromolecular Substances; D013729:Terpenes; C030216:pinane; D012822:Silicon Dioxide; D009532:Nickel; D000432:Methanol