Sunlight-Catalyzed Conversion of Cyclic Organics with Novel Mesoporous Organosilicas

Sunlight-Catalyzed Conversion of Cyclic Organics with Novel Mesoporous Organosilicas

Porphyrin-embedded periodic mesoporous organosilica (PMO) materials were developed for sunlight-stimulated degradation of cyclic organics. The binding affinity and selectivity of the PMOs act to bring porphyrin and target into close proximity, provide extensive surface area, and a stable substrate f...

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Bibliographische Detailangaben
Hauptverfasser: Johnson-White, Brandy, Zeinali, Mazyar, Malanoski, Anthony P, Dinderman, Michael A
Format: Report
Sprache:eng
Schlagworte:
ADSORPTION
CATALYSTS
CYCLES
ILLUMINATION
MESOPOROUS ORGANOSILICA
Organic Chemistry
ORGANIC MATERIALS
PHOTOCATALYSIS
PORPHYRINS
REPRINTS
RESTRAINT
SAMPLING
STABILITY
SUBSTRATES
SUNLIGHT
SURFACES
TNT
WATER
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Beschreibung
Zusammenfassung:Porphyrin-embedded periodic mesoporous organosilica (PMO) materials were developed for sunlight-stimulated degradation of cyclic organics. The binding affinity and selectivity of the PMOs act to bring porphyrin and target into close proximity, provide extensive surface area, and a stable substrate for porphyrin immobilization. Aqueous samples incubated with these PMO materials showed a decrease in analyte concentration greater than that expected based on adsorption and uncatalyzed photoconversion during 5 h of sunlight illumination. Both materials show selective binding of TNT over structurally similar compounds such as p-nitrophenol. Template directed molecular imprinting was used in an attempt to increase the selectivity of the catalyst. Published in Catalysis Communications, v8 p1052-1056, 2007.