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Lee, Jae Sung
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CdS-AgGaS2 photocatalytic diodes for hydrogen production from aqueous Na2S/Na2SO3 electrolyte solution under visible light (lambda >= 420 nm)

Alternative Title
CdS-AgGaS2 photocatalytic diodes for hydrogen production from aqueous Na2S/Na2SO3 electrolyte solution under visible light (lambda >= 420 nm)
Author(s)
Jang, Jum SukHwang, Dong WonLee, Jae Sung
Issued Date
2007-02
DOI
10.1016/j.cattod.2006.07.052
URI
https://scholarworks.unist.ac.kr/handle/201301/12911
Fulltext
http://www.sciencedirect.com/science/article/pii/S0920586106004792
Citation
CATALYSIS TODAY, v.120, no.2, pp.174 - 181
Abstract
A p-type semiconductor, bulky AgGaS2, was prepared by the conventional solid state reaction and heat-treated at various temperatures under He and H2S gas flow to eliminate vacancies or interstitial defects and to improve the crystallinity. A p-n diode, n-CdS/P-AgGaS2 was fabricated by decorating AgGaS2 surface with nanoparticles of n-type US by the hydrothermal treatment. The configuration was confirmed by XRD, UV-vis spectroscopy and TEM. The composite photocatalyst of this new configuration exhibited a high rate of hydrogen production under visible light irradiation (lambda >= 420 nm) from water containing sulfide and sulfite as hole scavengers. The photocatalytic diode system formed with n- and p-type semiconductors results in efficient charge separation, caused by the rectification of photo-electrons and holes generated upon photo-absorption. (c) 2006 Elsevier B.V. All rights reserved
Publisher
ELSEVIER SCIENCE BV
ISSN
0920-5861
Keyword (Author)
AgGaS2CdSphotocatalytic diodehydrogen productionphotocatalysts
Keyword
CDS-CUGAS2 HETERODIODESCADMIUM-SULFIDEEMISSIONCRYSTALSAGGAS2CELLS

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