Sol-Gel Synthesis of Supported Metals

Heinrichs, Benoı̂t; Lambert, Stéphanie; Job, Nathalie; Pirard, Jean-Paul

doi:10.1201/9781420006506.ch8

Cited by 8 publications

(22 citation statements)

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“…[195] This is similar to the preparation of supported metal catalysts using conventional solvents instead of ionic liquids. [192,196,197] For instance, Pd colloids were formed by mixing Pd(OAc) 2 4 (where Et ¼ ethyl) and formic acid. [198] In another work, Ru nanoparticles in [BMim] [BF 4 ] were added to a solution containing tetraethoxy orthosilicate (TEOS), and SiO 2 support was formed by a sol-gel process.…”

Section: Preparation Of Supported Catalystsmentioning

confidence: 99%

Preparation of Inorganic Materials Using Ionic Liquids

2009

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Conventional synthesis of inorganic materials relies heavily on water and organic solvents. Alternatively, the synthesis of inorganic materials using, or in the presence of, ionic liquids represents a burgeoning direction in materials chemistry. Use of ionic liquids in solvent extraction and organic catalysis has been extensively studied, but their use in inorganic synthesis has just begun. Ionic liquids are a family of non-conventional molten salts that can act as templates and precursors to inorganic materials, as well as solvents. They offer many advantages, such as negligible vapor pressures, wide liquidus ranges, good thermal stability, tunable solubility for both organic and inorganic molecules, and much synthetic flexibility. In this Review, the use of ionic liquids in the preparation of several categories of inorganic and hybrid materials (i.e., metal structures, non-metal elements, silicas, organosilicas, metal oxides, metal chalcogenides, metal salts, open-framework structures, ionic liquid-functionalized materials, and supported ionic liquids) is summarized. The status quo of the research field is assessed, and some future perspectives are furnished.

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Section: Preparation Of Supported Catalystsmentioning

confidence: 99%

Preparation of Inorganic Materials Using Ionic Liquids

2009

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“…De esta manera, el catalizador ideal para un proceso específico debería cumplir todo en un mismo material; además, hay que evitar crear una estructura que sea sólo una curiosidad de laboratorio y que por razones técnicas o económicas no puede ser fabricada a escala industrial [17].…”

Section: Métodos De Preparación De Catalizadoresunclassified

“…En primera medida, un sol es una suspensión coloidal de partículas sólidas en un líquido; por otra parte, un coloide es una suspensión en la cual la fase dispersada es tan pequeña (≈1 nm -1 μm) que las fuerzas gravitacionales son insignificantes y las interacciones son dominadas por efectos de corto alcance, como atracciones de Van Der Waals y fuerzas electrostáticas resultado de cargas superficiales [17]. Finalmente, un gel puede interpretarse como fases sólidas y líquidas continuas de dimensiones coloidales.…”

Section: Síntesis Sol-gelunclassified

“…Dado que ambas fases son de dimensión coloidal, un segmento de línea que se origina en un poro y que corre perpendicularmente a la superficie sólida más próxima, debe resurgir en otro poro a menos de 1 μm de distancia. De forma similar, un segmento que se origina dentro de la fase sólida y que pasa perpendicularmente a través de la pared de poro debe volver a entrar en la fase sólida a una distancia de 1 μm [17].…”

Section: Síntesis Sol-gelunclassified

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Preguntas orientadoras para la síntesis de catalizadores y su uso en reacciones de oxidación catalítica selectiva

Cortés-Ortiz¹,

Guerrero-Fajardo²

2020

Rev. UIS ing.

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En el presente documento se presenta una breve historia de la catálisis, así como de los procesos de oxidación selectiva de hidrocarburos. Por otra parte, se mencionan los conceptos básicos involucrados en la catálisis heterogénea haciendo énfasis en el papel de los materiales catalíticos en procesos químicos de oxidación y planteando una serie de preguntas orientadoras que se deben seguir al momento de abordar un proceso catalizado por materiales sólidos. De la misma manera, se muestra los métodos de síntesis de catalizadores denominados en la literatura como sol-gel e impregnación, identificando la influencia de cada etapa de preparación con las propiedades físicas y químicas de los materiales. Finalmente, se presenta un caso de estudio aplicado a la oxidación catalítica selectiva de metano y metanol empleando materiales catalíticos de hierro, molibdeno y vanadio sintetizados por el método sol-gel.

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“…108, 109 The surface sol-gel or chemical grafting method (Section 4.1) was initially used to modify flat surfaces and powders for other applications. 63 The solvated metal atom impregnation method (Section 7) was initially used by inorganic chemists, 110 although they did not report gold catalysis at that time.…”

Section: 107mentioning

confidence: 99%

Gold Nanoparticles as Chemical Catalysts

Overbury

Dai

2005

Encyclopedia of Inorganic Chemistry

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Gold, often known as being chemically inert , has rich inorganic and organic chemistry. In particular, gold nanoparticles, either protected by organic ligands or supported on solid surfaces, have attracted wide attention for their applications in catalysis, electronics, nonlinear optics, and biology. In this article, we summarize some recent advances in the synthesis of supported gold catalysts from the perspective of inorganic materials chemistry. These advances include new methods used to load gold, to prepare functionalized supports, and to postdecorate supported gold catalysts. More recent advances in the use of nanoparticle supports and other ordered nanostructures in making supported gold catalysts are also highlighted, and a critical analysis of the status of the field is presented. From this review, it is hoped that the reader will get an impression that inorganic materials chemistry can contribute to the synthesis of novel gold catalysts with good catalytic performance.

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Sol-Gel Synthesis of Supported Metals

Cited by 8 publications

References 0 publications

Preparation of Inorganic Materials Using Ionic Liquids

Preparation of Inorganic Materials Using Ionic Liquids

Preguntas orientadoras para la síntesis de catalizadores y su uso en reacciones de oxidación catalítica selectiva

Gold Nanoparticles as Chemical Catalysts

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