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ygb7086

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clearsky7228

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ygb7086(½ð±Ò+10,VIP+0): 9-10 08:37
ygb7086(½ð±Ò+2,VIP+0): 9-10 08:37
Sb2S3 can absorb the electron - hole pairs which  generates by the excited of the visible light in sunlight when it is irradiated  by the sunlight . The hole in the valence band has a strong oxidation ability, and  most of the organic matter can be rapidly decomposed into CO2, H2O and other nontoxic substances; The electrons excited to conduction band in the sample, becoming free electrons, are trapped by the oxygen molecules  which adsorbed on the surface ,and eventually generate superoxide anion (O2-) and hydroxyl radical (• OH)with high activity, which  have strong oxidation ability, and can achieve effectively photocatalytic degradation of methylene blue.
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jw227

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ygb7086(½ð±Ò+13,VIP+0): 9-10 08:37
On the  irradiation of the sunlight, electron - hole pairs were generated when Sb2S3 absorbing  the visible light of sunlight and excited . The hole in the valence band has a strong oxidation ability. This can the rapidly oxidate and decompose most of organic compounds into CO2, H2O and other toxic substances. Electrons excited  in the conduction band of the sample became free electrons and  was  trapped by the oxygen molecules, which adsorbed on the surface. They  eventually generate high activity of superoxide anion (O2-) and hydroxyl radical (• OH), which also have strong oxidation ability and can effectively photocatalytic degradation to methylene blue.

[ Last edited by jw227 on 2009-9-9 at 11:27 ]
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