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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Formation of <TEX>$I_2$</TEX> by a Photocatalytic Reaction of Rose Bengal

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1996, v.9 no.1, pp.72-77
Yoon, Kil-Joong
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Abstract

In the process of solar energy conversion into electrical energy using the photoelectrochemical cell containing the sensitizer, rose bengal and supersensitizer. <TEX>$I^-$</TEX>, the photocurrent is stabilized and durable. But the long time span of irradiation causes the decrease of photocurrent monotonically. Spectroscopic and electrochemical analyses of rose bengal solution containing <TEX>$I^-$</TEX> revealed that the decrease of concentration of rose bengal was attributed to the reaction of rose bengal in the dark with <TEX>$I_2$</TEX> formed as a result of the possible photocatalytic reaction of rose bengal with <TEX>$I^-$</TEX>.

keywords
Rose bengal, Supersensitizer, Photoelectrochemical cell, Photocurrent


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