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White-light emission from solid carbon in aqueous solution during hydrogen generation induced by nanosecond laser pulse irradiation

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Abstract

We previously discovered a novel method of hydrogen generation from high-grade charcoal in an aqueous solution using nanosecond laser pulse irradiation. In this paper, white-light emission during this reaction is reported: A broad spectrum over the visible range is observed above a threshold excitation energy density. The white-light emission is a simultaneous product of the hydrogen generation reaction and is attributed to blackbody radiation in accordance with Planck’s Law at a temperature above 3800 K. Consequently, we propose that hydrogen generation induced by laser irradiation proceeds similarly to classical coal gasification, which features reactions at high pressure and high temperature.

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Authors and Affiliations

  1. Department of Material Science and Chemistry, Wakayama University, Sakaedani 930, Wakayama, 640-8510, Japan

    Ikuko Akimoto, Shota Yamamoto & Kosuke Maeda

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  1. Ikuko Akimoto
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  2. Shota Yamamoto
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  3. Kosuke Maeda
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Correspondence to Ikuko Akimoto.

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Akimoto, I., Yamamoto, S. & Maeda, K. White-light emission from solid carbon in aqueous solution during hydrogen generation induced by nanosecond laser pulse irradiation. Appl. Phys. A 122, 675 (2016). https://doi.org/10.1007/s00339-016-0174-9

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  • DOI: https://doi.org/10.1007/s00339-016-0174-9

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