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Kosobutskii, V. S.; Vrublevskii, A. I.

doi:10.1023/a:1016526518030

Cited by 5 publications

(1 citation statement)

References 2 publications

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“…Initial product yields have been reported in the radiation induced decomposition of chloromethanes in both aerated and deaerated conditions, at various pH, and in the presence of radical scavengers like formate or t-butanol [4][5][6][7][8][9][10][11][12][13][14][15][16]. Because of their high electron affinity, the primary step in the reduction of chloromethanes is reaction with the hydrated electron by a dissociative electron capture mechanism to release the chloride anion, Cl À .…”

Section: Introductionmentioning

confidence: 99%

High dose radiolysis of aqueous solutions of chloromethanes: Importance in the storage of radioactive organic wastes

Rajesh

LaVerne

Pimblott

2007

Journal of Nuclear Materials

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Section: Introductionmentioning

confidence: 99%

High dose radiolysis of aqueous solutions of chloromethanes: Importance in the storage of radioactive organic wastes

Rajesh

LaVerne

Pimblott

2007

Journal of Nuclear Materials

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Graphitization of Chlorohydrocarbons in Laser‐Induced Plasma Filaments

Miyasaka

Hamaguchi

Yatsuhashi

2016

Elect Comm in Japan

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SUMMARY The decomposition of aqueous chlorohydrocarbons regarded as environmental pollutants has been widely studied. However, it is usually difficult to separate liquid and/or volatile products originated from chlorohydrocarbons from reactant solution. We succeeded to precipitate hydrophobic carbon nanoparticles and their agglomerates from aqueous dichloromethane by femtosecond laser (0.8 μm, 40 fs) irradiation. In the case of water/dichloromethane bilayer solution, the precipitates were produced in abundance when the water layer was exposed to femtosecond laser pulses. The time evolution of pH and transmittance revealed that the precipitation of carbon particles was preceded by dechlorination. Focusing intense femtosecond laser pulses onto water creates a high density of reactive species in a well‐confined volume; that is, plasma filament. The graphitization hence solidification by using laser pulses could be a useful way to remove chlorinated compounds from their aqueous solution.

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Precipitation of dichloromethane as low-chlorine carbon nanoparticles from water by femtosecond laser pulses

Okamoto

Miyasaka

Mitamura

et al. 2017

Journal of Photochemistry and Photobiology A: Chemistry

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We report on the transformation of dichloromethane to low-chlorine carbon nanoparticles by the exposure of aqueous dichloromethane solution and/or dichloromethane/water biphasic solution to femtosecond laser pulses. The pH of either solution immediately decreased due to the reduction of dichloromethane by hydrated electrons. The time evolution of transmittance revealed that particle formation was suppressed when the initial pH was low because protons scavenge hydrated electrons. The size and morphology of nanoparticles was independent of the initial pH and the reaction solution used. The analysis of the elemental composition of carbon particles showed that the Cl/C atomic ratio was, independent on the initial pH values, greatly reduced to 0.06. We propose that the violent destruction of dichloromethane and elimination of chlorine atoms not only as Cl − but also Cl2 excludes chlorine atoms from the carbon network construction processes toward the formation of carbon nanoparticles.

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Untitled

Cited by 5 publications

References 2 publications

High dose radiolysis of aqueous solutions of chloromethanes: Importance in the storage of radioactive organic wastes

High dose radiolysis of aqueous solutions of chloromethanes: Importance in the storage of radioactive organic wastes

Graphitization of Chlorohydrocarbons in Laser‐Induced Plasma Filaments

Precipitation of dichloromethane as low-chlorine carbon nanoparticles from water by femtosecond laser pulses

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