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Browsing by Author "Chang, Yu-Hsueh"

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    Synthesis of Cu2O nanoparticle films at room temperature for solar water splitting
    (2016-06-01)
    Lin, Yan-Gu
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    Hsu, Yu-Kuei
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    Lin, Yu -Chang
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    Chang, Yu-Hsueh
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    Chen, San -Yuan
    A Cu2O nanoparticle film using ZnO nanorods as a sacrificial scaffold was fabricated near 23 degrees C, for applications in photoelectrochemical (PEC) water splitting. Three chemical solutions were utilized to convert ZnO nanorods to a Cu2O nanoparticle film - solutions of CuCl2 and NaOH, NaBH4 and NaOH, respectively. The structural evolution from ZnO through Cu(OH)(2) and metallic Cu to Cu2O phase was analyzed at each stage with X-ray diffraction and X-ray absorption spectra. The energy bandgap was deduced from IPCE; the concentration of carriers and flat-band of a Cu2O nanoparticle film were obtained from a Mott-Schottky plot. Significantly, the Cu2O nanoparticle film exhibited a useful PEC response to water oxidation. This nanostructure synthesized with no energy requirement can not only illustrate a great prospect for solar generation of hydrogen but also offer a blueprint for the future design of photocatalysts. (C) 2016 Elsevier Inc. All rights reserved.