Structural effect on photocatalytic degradation of metallised azo dyes in aqueous TiO2 suspension |
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| Authors: | Haoqiang Zhan He Tian Kongchang Chen Weihong Zhu |
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| Institution: | 1. Institute of Fine Chemicals , East China University of Science &2. Technology , Shanghai, 200237, People's Republic of China;3. Technology , Shanghai, 200237, People's Republic of China E-mail: hetian@ecust.edu.cn. |
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| Abstract: | Three metallised azo dyes were investigated under TiO2‐photocatalytic and photosensitised conditions in aqueous buffering solutions. The degradation follows apparent first‐order kinetics. The size and strength of intramolecular conjugation determine the light‐fastness of the investigated dyes. Compared with 1O2 produced in photosensitised process, the more powerful *OH radicals in TiCO2 photocatalytic process are highly reactive towards the investigated azo dyes. And as a result, the TiO2‐photocatalysis makes little less distinction in the degradation kinetic data of the azo dyes compared with the photosensitised degradation of them. |
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| Keywords: | Metallised azo dyes photocatalytic degradation nanoparticles of titanium dioxide structural effect |
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