Browsing Archive: February, 2016
Posted by UPM Ashik on Saturday, February 6, 2016,
AbstractStructures of various conformers of G-quartets (G4) with different types of hydrogen bonding patterns have been investigated through various levels of Density Functional Theory (DFT). Their structure and stability has been compared with the diad (G2), triad (G3), pentad (G5) and hexad (G6) of guanine. The calculations show that G4 has the highest stabilization through hydrogen-bond interaction which explains the tendency of guanine rich strands in the telomeric region to favor the for...
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Posted by UPM Ashik on Saturday, February 6, 2016,
AbstractThermocatalytic decomposition of methane (TCD) is a fully green single step technology for producing hydrogen and nano-carbon. This review studying all development in laboratory-scale research on TCD, especially the recent advances like co-feeding effect and catalyst regeneration for augmenting the productivity of the whole process. Although a great success on the laboratory-scale has been fulfilled, TCD for greenhouse gas (GHG) free hydrogen production is still in its infancy. The ne...
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Posted by UPM Ashik on Saturday, February 6, 2016,
Abstract
Co-precipitation cum modified Stöber method is a continuous process avoiding application of higher temperature treatment before supporting nano-metal with SiO2, irrespective of pre-experimented methods. We have resumed co-precipitation process without undertaking calcination under air in order to avoid even a partial particle agglomeration and hence maintained average particle size ~30nm after enforcing with SiO2. It is a first report adopting such an unceasing preparation for prepar...
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Posted by UPM Ashik on Saturday, February 6, 2016,
Abstractn-Ni/SiO2, n-Fe/SiO2 and n-Co/SiO2 nano-catalysts were prepared by co-precipitation cum modified Stöber method and applied for thermocataltytic decomposition of methane in order to investigate their thermal stability and activity to produce greenhouse gas free hydrogen and nano-carbon. Mean particles sizes of produced nano-catalysts obtained from BET analysis are 32.19 nm, 30.26 nm and 49.92 nm, respectively. Temperature programmed methane decomposition were conducted as preliminary ...
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Posted by UPM Ashik on Saturday, February 6, 2016,
Abstract
Nanoparticle formation from their respective precursors through bottom-up method is a very fascinating practice in nanotechnology. This research contribution discusses two promising bottom-up methods: i) controlled precipitation of Ni, Fe, and Co nanoparticles and reinforcement with silicate through modified Stöber method and ii) chemical vapor deposition of nanocarbon from methane. Experimental results reveal that metal oxide particles were formed as single-crystal nanoparticles aft...
