Event Title

Deposition of Carbon Particulates on Natural Porous Particles by Electron-Beam Evaporation by Graphite

Mentor 1

Marcia Silva

Location

Union Wisconsin Room

Start Date

28-4-2017 1:30 PM

End Date

28-4-2017 4:00 PM

Description

In this work we present the adsorption of amorphous carbon particulates on the surface of natural porous particles through electron beam evaporation by graphite. Recent studies indicate that the modification of the surface topography of these porous particles can significantly enhance their adsorption capabilities thereby increasing their effectiveness in removing harmful materials from the environment. Our experiment shows what inherent characteristics of the parent particles can be modified by depositing carbon onto their surface. The evaporation rate and final thickness as a function of the beam power during the procedure is measured. The dependence that the evaporation rate has on the beam power has a threshold character. The lowest power for evaporation is390 Win our experiments with a maximum power of 740 W. The evaporation rate was 0.10-1.0 ú/s throughout the process and 1ú/s on the final soaking power output. An analysis of the deposited carbon particulates was done by Fourier Transform Infrared (FTIR) spectroscopy and Raman spectroscopy. FTIR and Raman spectroscopic analysis determined that a conversion from sp2 to sp3 bonding indicates a ring to chain carbon formation seen in amorphous carbon particulates. Surface area and pore volume/size analysis of the porous particles were determined. Analyses of the porous particles indicated that the adsorption properties of this material are significantly enhanced after deposition thus permitting their application in multiple fields such as environmental and medical.

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Apr 28th, 1:30 PM Apr 28th, 4:00 PM

Deposition of Carbon Particulates on Natural Porous Particles by Electron-Beam Evaporation by Graphite

Union Wisconsin Room

In this work we present the adsorption of amorphous carbon particulates on the surface of natural porous particles through electron beam evaporation by graphite. Recent studies indicate that the modification of the surface topography of these porous particles can significantly enhance their adsorption capabilities thereby increasing their effectiveness in removing harmful materials from the environment. Our experiment shows what inherent characteristics of the parent particles can be modified by depositing carbon onto their surface. The evaporation rate and final thickness as a function of the beam power during the procedure is measured. The dependence that the evaporation rate has on the beam power has a threshold character. The lowest power for evaporation is390 Win our experiments with a maximum power of 740 W. The evaporation rate was 0.10-1.0 ú/s throughout the process and 1ú/s on the final soaking power output. An analysis of the deposited carbon particulates was done by Fourier Transform Infrared (FTIR) spectroscopy and Raman spectroscopy. FTIR and Raman spectroscopic analysis determined that a conversion from sp2 to sp3 bonding indicates a ring to chain carbon formation seen in amorphous carbon particulates. Surface area and pore volume/size analysis of the porous particles were determined. Analyses of the porous particles indicated that the adsorption properties of this material are significantly enhanced after deposition thus permitting their application in multiple fields such as environmental and medical.