Fast fabrication of hollow silica spheres with thermally stable nanoporous shells

Cheng, Xin; Liu, Shiquan; Lu, Lingchao; Sui, Xueye; Meynen, Vera; Cool, Pegie; Vansant, Etienne F.; Jiang, Jianzhuang

doi:10.1016/j.micromeso.2006.08.014

Cited by 36 publications

(14 citation statements)

References 35 publications

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“…Oleic acid can form a stable O/W emulsion at appropriate concentrations (process a). 41 In the emulsion, the "Baeyer test for unsaturation" reaction quickly occurs between KMnO 4 and oleic acid at the O/W interface and produces K x MnO 2 nuclei there (process b). 42 At low KMnO 4 concentrations, small amounts of lamellar K x MnO 2 platelets are produced, and thus an unstable shell of loosely packed platelets is formed (process c).…”

Section: Crystalline Structures and Elemental Analysesmentioning

confidence: 99%

Self-Assembly of Novel Mesoporous Manganese Oxide Nanostructures and Their Application in Oxidative Decomposition of Formaldehyde

et al. 2007

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Monodisperse manganese oxide honeycomb and hollow nanospheres have been prepared facilely at room temperature by varying the molar ratio of KMnO 4 and oleic acid. These new nanomaterials were characterized by XRD, SEM, EDS, TEM, and BET measurements. They had robust nanostructures and were stable even after ultrasonic treatment (40 kHz, 120 W) for 30 min. A plausible mechanism of the formation of manganese oxide nanostructures was proposed. The manganese oxide nanomaterials showed high catalytic activities for oxidative decomposition of formaldehyde at low temperatures. Complete conversion of formaldehyde to CO 2 and H 2 O could be achieved, and harmful byproducts were not detected in effluent gases. The catalytic activity of manganese oxide hollow nanospheres was much higher than that of honeycomb nanospheres, although the surface area of the latter was nearly 2 times as high as that of the former. The mechanism of such morphologydependent catalytic activity was discussed in detail. The catalytic activities of the obtained manganese oxide nanospheres were also significantly higher than those of previously reported manganese oxide octahedral molecular sieve (OMS-2) nanorods, MnO x powders, and alumina-supported manganese-palladium oxide catalysts. Potential applications and future research efforts were proposed.

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Section: Crystalline Structures and Elemental Analysesmentioning

confidence: 99%

Self-Assembly of Novel Mesoporous Manganese Oxide Nanostructures and Their Application in Oxidative Decomposition of Formaldehyde

et al. 2007

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“…Microscopic analysis was carried out as described by Cheng et al (2007). Briefly, the samples were mounted on aluminum stubs and sputtered with a thin gold layer (model SCD005, BAL-TEC, Balzers, Liechtenstein).…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Use of Sugarcane Bagasse with Different Particle Sizes to Determine the Relationship between Physical Properties and Enzymatic Hydrolysis

Zhou

et al. 2016

BioResources

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The supramolecular structures of a substrate, such as crystallinity, specific surface area, average pore size, and cellulase adsorption capacity, etc., affect the enzymatic hydrolysis of a lignocellulosic biomass. It is unclear which of these factors is most important for efficient hydrolysis. To eliminate the influence of the hemicellulose content and the lignin, sugarcane bagasse samples with the same cellulose, hemicellulose, and lignin content but with different particle sizes were used as substrates to investigate the relationship between physical properties and enzymatic conversion efficiency. When the content of hemicellulose and lignin was not significantly different, the decrease in the crystallinity index (CrI) and the increase in the specific surface area (SSA), cellulase adsorption, average pore size, and the cellulase adsorption per SSA could give rise to higher enzymatic convertibility. The effects of the CrI and the average pore size were more pronounced than the effects of the SSA, the cellulase adsorption capacity, and the cellulase adsorption per SSA. According to the developed formula, the CrI was more influential than the average pore size under the specific conditions.

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“…Other methods have also presented critical strategies to get access to the hollow silica spheres, such as synthesis of submicrometer size mesoporous hollow SiO 2 powder by means of several compatible organic compound as templates [18], novel droplet-templated methods to prepare hollow silica with nanoporous shell [19], as well as other strategies based on vesicles, gels, gas bubbles and other organic or inorganic templates [20][21][22][23]. Among those described above, two of the most common methods can be concluded, that is the sol-gel method and the removable solid templates method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of stable hollow silica nanospheres

Tan

Park

2009

Journal of Industrial and Engineering Chemistry

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Fast fabrication of hollow silica spheres with thermally stable nanoporous shells

Cited by 36 publications

References 35 publications

Self-Assembly of Novel Mesoporous Manganese Oxide Nanostructures and Their Application in Oxidative Decomposition of Formaldehyde

Self-Assembly of Novel Mesoporous Manganese Oxide Nanostructures and Their Application in Oxidative Decomposition of Formaldehyde

Use of Sugarcane Bagasse with Different Particle Sizes to Determine the Relationship between Physical Properties and Enzymatic Hydrolysis

Synthesis of stable hollow silica nanospheres

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