Turbidimetric method for evaluation of photocatalytic activities of suspended fine particles

Hideki Aoyagi1, Katsumi Yabusaki21Life Science and Bioengineering, Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan; 2Electronics and Optics Research Laboratory, Kowa Ltd, Chofugaoka, Chofu City, Tokyo, JapanAbstract: A spectrophotometer with special...

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Autores principales:	Hideki Aoyagi, Katsumi Yabusaki
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2010
Materias:	Medical technology R855-855.5 Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/f7530971007d443db27680741e26ab80
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spelling	oai:doaj.org-article:f7530971007d443db27680741e26ab802021-12-02T01:57:57ZTurbidimetric method for evaluation of photocatalytic activities of suspended fine particles1177-8903https://doaj.org/article/f7530971007d443db27680741e26ab802010-10-01T00:00:00Zhttp://www.dovepress.com/turbidimetric-method-for-evaluation-of-photocatalytic-activities-of-su-a5428https://doaj.org/toc/1177-8903Hideki Aoyagi1, Katsumi Yabusaki21Life Science and Bioengineering, Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan; 2Electronics and Optics Research Laboratory, Kowa Ltd, Chofugaoka, Chofu City, Tokyo, JapanAbstract: A spectrophotometer with special cuvette was developed for evaluating the photocatalytic activities of suspended fine particles. The spectrophotometer can continuously irradiate UV light using LED to the sample solution, and changes in the absorbance at 664 nm during photocatalytic degradation of methylene blue (MB) were monitored continuously. From the onset of MB degradation, the absorbance decreased and reached a steady value at the end of the reaction. This process was expressed by first order kinetics and the photocatalytic activities of various fine particles could be evaluated quantitatively based on the reaction rate constant (k). The effect of photocatalysis using various TiO2 fine particles on the physiological activities of Euglena gracilis was related with k value.Keywords: photocatalyst, fine nano sized particles, specialized spectrophotometer, Euglena gracilis, rate constant Hideki AoyagiKatsumi YabusakiDove Medical PressarticleMedical technologyR855-855.5Chemical technologyTP1-1185ENNanotechnology, Science and Applications, Vol 2010, Iss default, Pp 85-90 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medical technology R855-855.5 Chemical technology TP1-1185
spellingShingle	Medical technology R855-855.5 Chemical technology TP1-1185 Hideki Aoyagi Katsumi Yabusaki Turbidimetric method for evaluation of photocatalytic activities of suspended fine particles
description	Hideki Aoyagi1, Katsumi Yabusaki21Life Science and Bioengineering, Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan; 2Electronics and Optics Research Laboratory, Kowa Ltd, Chofugaoka, Chofu City, Tokyo, JapanAbstract: A spectrophotometer with special cuvette was developed for evaluating the photocatalytic activities of suspended fine particles. The spectrophotometer can continuously irradiate UV light using LED to the sample solution, and changes in the absorbance at 664 nm during photocatalytic degradation of methylene blue (MB) were monitored continuously. From the onset of MB degradation, the absorbance decreased and reached a steady value at the end of the reaction. This process was expressed by first order kinetics and the photocatalytic activities of various fine particles could be evaluated quantitatively based on the reaction rate constant (k). The effect of photocatalysis using various TiO2 fine particles on the physiological activities of Euglena gracilis was related with k value.Keywords: photocatalyst, fine nano sized particles, specialized spectrophotometer, Euglena gracilis, rate constant
format	article
author	Hideki Aoyagi Katsumi Yabusaki
author_facet	Hideki Aoyagi Katsumi Yabusaki
author_sort	Hideki Aoyagi
title	Turbidimetric method for evaluation of photocatalytic activities of suspended fine particles
title_short	Turbidimetric method for evaluation of photocatalytic activities of suspended fine particles
title_full	Turbidimetric method for evaluation of photocatalytic activities of suspended fine particles
title_fullStr	Turbidimetric method for evaluation of photocatalytic activities of suspended fine particles
title_full_unstemmed	Turbidimetric method for evaluation of photocatalytic activities of suspended fine particles
title_sort	turbidimetric method for evaluation of photocatalytic activities of suspended fine particles
publisher	Dove Medical Press
publishDate	2010
url	https://doaj.org/article/f7530971007d443db27680741e26ab80
work_keys_str_mv	AT hidekiaoyagi turbidimetricmethodforevaluationofphotocatalyticactivitiesofsuspendedfineparticles AT katsumiyabusaki turbidimetricmethodforevaluationofphotocatalyticactivitiesofsuspendedfineparticles
_version_	1718402811278917632

Turbidimetric method for evaluation of photocatalytic activities of suspended fine particles

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