نتایج جستجو برای: mesocellular silica foam mcf impregnation heterogeneous photocatalysis

تعداد نتایج: 195718  

Journal: :Rapid communications in mass spectrometry : RCM 2007
Young-Pil Kim Kun Cho Dohoon Lee Yunxian Piao Yeong Hee Ahn Jong Shin Yoo Taeghwan Hyun Hak-Sung Kim

We demonstrate that magnetic mesocellular carbon foams (Mag-MCF-C) can be effectively used for enrichment and desalting of protein digests or peptides in matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). The large mesocellular pores and surface area of Mag-MCF-C are likely to mainly contribute to high efficiency in enrichment and desalting of protein digests. The magneti...

Curcumin is the natural bio-active component of turmeric (Curcuma longa L.) with known therapeutic properties; nevertheless, its biological applications are limited due to its poor bioavailability. To overcome this limitation, curcumin was conjugated with silica nanoparticles. Curcumin was separated from turmeric by microwave-assisted extraction and silica nanoparticles were developed from rice...

2016
Oscar Verho Anuja Nagendiran Cheuk-Wai Tai Eric V. Johnston Jan-E. Bäckvall

Herein, we report on the use of nanopalladium on amino-functionalized siliceous mesocellular foam as an efficient heterogeneous catalyst for the transfer hydrogenation of nitroarenes to anilines. In all cases, the protocol proved to be highly selective favoring the formation of the desired aniline as the single product in high yields with short reaction times, when employing the naturally-occur...

2015
Oscar Verho Torbjörn Åkermark Eric V Johnston Karl P J Gustafson Cheuk-W Tai Henrik Svengren Markus D Kärkäs Jan-E Bäckvall Björn Åkermark

Herein, we describe the use of Pd nanoparticles immobilized on an amino-functionalized siliceous mesocellular foam for the catalytic oxidation of H2O. The Pd nanocatalyst proved to be capable of mediating the four-electron oxidation of H2O to O2, both chemically and photochemically. The Pd nanocatalyst is easy to prepare and shows high chemical stability, low leaching, and recyclability. Togeth...

Journal: :The journal of physical chemistry. B 2005
Yan Xi Corey Reed Yong-Kul Lee S Ted Oyama

Supported manganese oxide catalysts were prepared by the impregnation of alumina foam blocks washcoated with alumina and silica. The manganese content based on the weight of the washcoats was 10 wt % calculated as MnO2. Fourier transform profiles of the Mn K-edge EXAFS spectra for these samples gave three distinctive peaks at 0.15, 0.25, and 0.32 nm and were close to the profiles of Mn3O4 and b...

2017
Bunsho Ohtani

Although the history of photocatalysis research is not so long, many researchers have studied photocatalysis and a large number of papers on photocatalysis have been published. The objectives of this review paper are to revisit the fundamentals of photocatalysis, especially its thermodynamics and kinetics, which have not been reexamined in recent studies, to clarify the problems, if any, that p...

Journal: :ChemEngineering 2021

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