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Ansari, Mohd Bismillah,Min, Byung-Hoon,Mo, Yong-Hwan,Park, Sang-Eon Royal Society of Chemistry 2011 GREEN CHEMISTRY Vol.13 No.6
<P>Mesoporous carbon nitrides (MCN) were prepared by a nano-casting method using mesoporous silica as a template with different carbon and nitrogen sources like melamine only (MS-MCN), urea-formaldehyde (UF-MCN) and melamine-glyoxal (MG-MCN). These mesoporous carbon nitride materials possess nitrogen moieties which behave like a CO<SUB>2</SUB>-philic surface facilitating oxidation of cyclic olefins by molecular oxygen in the co-presence of CO<SUB>2</SUB> below supercritical conditions. The co-presence of CO<SUB>2</SUB> augmented the conversions of cyclic olefins at low pressures of CO<SUB>2</SUB>, depicting a promotional effect. Approaches towards quantification of promotional effects and insights into the promotional aspects have been studied.</P> <P>Graphic Abstract</P><P>Promotional effects in the oxidation of cyclic olefins in the presence of carbon dioxide over mesoporous carbon nitrides were observed. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0gc00951b'> </P>
Carbon dioxide utilization as a soft oxidant and promoter in catalysis
Ansari, Mohd Bismillah,Park, Sang-Eon The Royal Society of Chemistry 2012 ENERGY AND ENVIRONMENTAL SCIENCE Vol.5 No.11
<P>The utilization of CO<SUB>2</SUB> as a soft oxidant and promoter is a promising concept for industrial applications that could not only contribute to the mitigation of CO<SUB>2</SUB> levels, but also the development of economical and energy efficient syntheses of various chemicals. The abundant availability, non-toxic, economic and mild oxidizing properties of CO<SUB>2</SUB> has resulted in immense interest in its use as an oxidant in several reactions, such as the oxidative coupling of CH<SUB>4</SUB> and the oxidative dehydrogenation of alkanes and alkyl aromatics. At present, only a few processes based on CO<SUB>2</SUB> as a soft oxidant have been realised on a technical scale in spite of dedicated research. This review is intended to trace the emergence, application and understanding of such systems and shed light on the further development that may lead to industrial scale operations in the near future.</P> <P>Graphic Abstract</P><P>The utilization of CO<SUB>2</SUB> as a soft oxidant and promoter is a promising concept for industrial applications that could not only contribute to the mitigation of CO<SUB>2</SUB> levels, but also the development of economical and energy efficient syntheses of various chemicals. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2ee22409g'> </P>
Jin, Hailian,Bismillah Ansari, Mohd,Park, Sang-Eon Royal Society of Chemistry 2011 Chemical communications Vol.47 No.26
<P>Mesoporous MFI zeolites (ZSM-5, TS-1, S-1) having intracrystalline mesoporosity within zeolite crystals were synthesized by microwave induced assembly through the ionic interaction between the sulfonic acid functionalized MFI zeolite nanoparticles and alkyltrimethylammonium cationic surfactants.</P> <P>Graphic Abstract</P><P>Mesoporous MFI zeolites having intracrystalline mesoporosity within zeolite crystals were synthesized by microwave induced assembly through the ionic interaction between the sulfonic acid functionalized MFI zeolite nanoparticles and alkyltrimethylammonium cationic surfactants. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1cc12259b'> </P>