The sol—gel preparation of porous catalyst spheres

Grift, C.J.G. van der; Mulder, Anne-Claire; Geus, J.W.

doi:10.1016/0166-6622(91)80139-f

Cited by 12 publications

(4 citation statements)

References 2 publications

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“…The gelation of sols into spheres was subsequently extended to ceramics intended for nonnuclear uses. These ceramics include zirconia, titania, silica, and alumina [184][185][186][187][188][189][190][191][192].…”

Section: Spheresmentioning

confidence: 99%

“…18, 33, 45, 48, 50, 54--5, 57, 60, 183, 184, 189, 194, 195, 198, 199, 221 ,) 16, 18,22, 33, 34 ceramics 1,5,10,12,14,16,17,31,33, 38,43--4,48,49,50,52,54,55,56, 61, 181, 182, 183, 184, 189, 191, 194, 198, 199 1,5,6,10,12,14,16,17,18,28,38,43,44,50,52,55,56,181,182,183,186,189,194,195,197,198,199 190,191,193,194,198,199, 38,57,184,190,194,197,198,210 188,194,198,199 …”

Section: Appendix A: Entropy Of Porous Materialsmentioning

confidence: 99%

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Porous Materials

Ishizaki¹,

Komarneni²,

Nanko³

1998

Materials Technology Series

162

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Section: Spheresmentioning

confidence: 99%

Section: Appendix A: Entropy Of Porous Materialsmentioning

confidence: 99%

Porous Materials

Ishizaki¹,

Komarneni²,

Nanko³

1998

Materials Technology Series

162

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“…In addition, the oxides of copper ( i.e. , Cu 2 O and CuO), which normally form on the outer shell of Cu NPs, also have numerous useful properties for catalysis, , fuel cells, solar cells, gas sensing, − and selective biofiltering for neutralizing and deactivating viruses. , To synthesize Cu and/or Cu 2 O NPs with well-defined morphology and chemical composition, both physical methods (including chemical vapor deposition and laser ablation) , and chemical methods (including sol−gel, hydrothermal, and electrochemical deposition) − have been used. Of these, the solution-based route is quite attractive because it requires a lower synthesis temperature and has potential for large-scale production of NPs.…”

mentioning

confidence: 99%

Nanoscale Shape and Size Control of Cubic, Cuboctahedral, and Octahedral Cu−Cu₂O Core−Shell Nanoparticles on Si(100) by One-Step, Templateless, Capping-Agent-Free Electrodeposition

et al. 2010

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Cu-Cu2O core-shell nanoparticles (NPs) of different shapes over an extended nanosize regime of 5-400 nm have been deposited on a H-terminated Si(100) substrate by using a simple, one-step, templateless, and capping-agent-free electrochemical method. By precisely controlling the electrolyte concentration [CuSO4 x 5H2O] below their respective critical values, we can obtain cubic, cuboctahedral, and octahedral NPs of different average size and number density by varying the deposition time under a few seconds (<6 s). Combined glancing-incidence X-ray diffraction and depth-profiling X-ray photoelectron spectroscopy studies show that these NPs have a crystalline core-shell structure, with a face-centered cubic metallic Cu core and a simple cubic Cu2O shell with a CuO outerlayer. The shape control of Cu-Cu2O core-shell NPs can be understood in terms of a diffusion-limited progressive growth model under different kinetic conditions as dictated by different [CuSO4 x 5H2O] concentration regimes.

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“…A few studies were reported on the preparation of large spherical granules (typically in the range of 100 p m to 5 mm) by gelation of individual droplets generated from colloidal suspension by the so-called "oil-drop" method (Capes and Fouda, 1984;Lapes, 1986;Komarneni and Roy, 1985;Triidinger et al, 1990;Ramsay, 1994;Marella et al, 1995). This oil-drop method, as reported mainly in the patent literature, has been successfully used to synthesize spherical silica (SO,) or zeolite granules (Yakov et al, 1978;Spek and van Beem, 1982; Barten et al, 1987;van der Grift et al, 1991;Kiel et al, 1992). Preparation of granular alumina supports by the oil-drop method starting from a suspension made of alumina powders was also reported recently (Shepeleva et al, 1991;Svoboda et al, 1993;Duisterwinkel and Frens, 1995).…”

Section: Introductionmentioning

confidence: 96%