Porous organic–inorganic hybrid aerogels based on bridging acetylacetonate

Yang, Qiuli; Tan, Xin; Wang, Sujuan; Zhang, Jianyong; Chen, Liuping; Zhang, Wei‐Xiong; Su, Cheng‐Yong

doi:10.1016/j.micromeso.2013.12.025

Cited by 21 publications

(15 citation statements)

References 52 publications

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“…S2), indicating the restriction of carbon for the forming of the fiber. It is reported that the morphology of the supramolecular is easily affected by the environment, such as solution 28 , ion 29 and preparation method 30 . During the pyrolysis of supramolecular gel, 1 1 1…”

Section: Resultsmentioning

confidence: 99%

Supramolecular gel-assisted synthesis of double shelled Co@CoO@N–C/C nanoparticles with synergistic electrocatalytic activity for the oxygen reduction reaction

Wang

Han

et al. 2016

Nanoscale

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Investigating active, stable, and low-cost materials for the oxygen reduction reaction is one of the key challenges in fuel-cell research. In this work, we describe the formation of N-doped carbon shell coated Co@CoO nanoparticles supported on Vulcan XC-72 carbon materials (Co@CoO@N-C/C) based on a simple supramolecular gel-assisted method. The double-shelled Co@CoO@N-C/C core-shell nanoparticles exhibit superior electrocatalytic activities for the oxygen reduction reaction compared to N-doped carbon and cobalt oxides, demonstrating the synergistic effect of the hybrid nanomaterials. Notably, the Co@CoO@N-C/C nanoparticles give rise to a comparable four-electron selectivity, long-term stability, and high methanol tolerance; all show a multi-fold improvement over the commercial Pt/C catalyst. The progress is of great importance in exploring advanced non-precious metal-based electrocatalysts for fuel cell applications.

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Section: Resultsmentioning

confidence: 99%

Supramolecular gel-assisted synthesis of double shelled Co@CoO@N–C/C nanoparticles with synergistic electrocatalytic activity for the oxygen reduction reaction

Wang

Han

et al. 2016

Nanoscale

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“…Hybrid aerogels are synthesized by incorporation of organic polymers such as polyacrylate, polyimide, or polyurea within an inorganic aerogel matrix such as silica aerogel. Hybrid aerogels may display enhanced mechanical properties as compared with either pure organic aerogels or pure inorganic aerogels while maintaining high porosity and high surface area [ 34 , 47 , 48 , 49 , 50 , 51 ].…”

Section: Aerogelsmentioning

confidence: 99%

Aerogels for Optofluidic Waveguides

et al. 2017

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Aerogels—solid materials keeping their internal structure of interconnected submicron-sized pores intact upon exchanging the pore liquid with a gas—were first synthesized in 1932 by Samuel Kistler. Overall, an aerogel is a special form of a highly porous material with a very low solid density and it is composed of individual nano-sized particles or fibers that are connected to form a three-dimensional network. The unique properties of these materials, such as open pores and high surface areas, are attributed to their high porosity and irregular solid structure, which can be tuned through proper selection of the preparation conditions. Moreover, their low refractive index makes them a remarkable solid-cladding material for developing liquid-core optofluidic waveguides based on total internal reflection of light. This paper is a comprehensive review of the literature on the use of aerogels for optofluidic waveguide applications. First, an overview of different types of aerogels and their physicochemical properties is presented. Subsequently, possible techniques to fabricate channels in aerogel monoliths are discussed and methods to make the channel surfaces hydrophobic are described in detail. Studies in the literature on the characterization of light propagation in liquid-filled channels within aerogel monoliths as well as their light-guiding characteristics are discussed. Finally, possible applications of aerogel-based optofluidic waveguides are described.

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“…[9,10] Compared with MOFs, the metal-organic gels possess poor crystallinities and unclear structures, however, they still have the following advantages: (1) The reaction can proceed at a low temperature, some materials can be obtained at room temperature; (2) the reaction time is shorter and solvent quantity is less; (3) reaction solvent is cheap and with low toxicity, the reaction can proceed in ethanol, water, N,N'-dimethylformamide (DMF), or the mixture of them; (4) the easily obtained desired shapes of the gels by utilizing various shapes of reaction containers make them more suitable for industrialized and commercial applications. Due to above points, metal-organic gels have amounts of potential applications in catalysis, [11] sensing, [12] anion recognition, [13] photophysics, [14,15] vapor adsorption, [16] separation technologies, electrochemical detection, [17] etc. Conformationally flexible ligands with amide groups [18][19][20] have been often employed to design metal-organic gels because the formed networks are able to trap solvent molecules in their crystal lattices.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Highly Stable Porous Metal‐Iminodiacetic Acid Gels from A Novel IDA Compound

et al. 2016

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In this work, a novel and simple flexible aromatic multi-carboxylate compound N,N'-(4,4'-biphenylyl) iminodiacetic acid (BP-IDA) was synthesized, with which two new stable metal-IDA gels (denoted as MIG1 and MIG2) with three-dimensional network structures have been prepared successfully by employing Cr 3＋ and Al 3＋ as the metal ions, respectively. The rheological performance was investigated by means of dynamic rheology measurement. The morphology and microstructure were characterized by scanning electron microscopy, transmission electron microscopy, and X-ray diffraction technique. Nitrogen sorption isotherm measurement suggests that the MIG1 aerogel has considerable porosity with the Brunauer-Emmett-Teller specific surface area up to 760 m 2 •g 1 . Owingto easy preparation, good stability, and three-dimensional network structure, the as-prepared metal-organic gels will possess potential applications in separation, catalysis, and drug delivery.

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Porous organic–inorganic hybrid aerogels based on bridging acetylacetonate

Cited by 21 publications

References 52 publications

Supramolecular gel-assisted synthesis of double shelled Co@CoO@N–C/C nanoparticles with synergistic electrocatalytic activity for the oxygen reduction reaction

Supramolecular gel-assisted synthesis of double shelled Co@CoO@N–C/C nanoparticles with synergistic electrocatalytic activity for the oxygen reduction reaction

Aerogels for Optofluidic Waveguides

Synthesis of Highly Stable Porous Metal‐Iminodiacetic Acid Gels from A Novel IDA Compound

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