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请各位高手帮忙翻译一句话，十分谢谢您。 当太阳光照射时，Sb2S3吸收太阳光中的可见光经激发产生电子-空穴对。位于价带的空穴具有很强的氧化能力，能将绝大部分的有机物迅速氧化分解为CO2，H2O等无毒物质；激发到样品导带中的电子，成为自由电子，被吸附在表面的氧分子俘获，最终生成具有高活性的超氧负离子(O2-)和羟基自由基 (•OH) ，它们也具有较强的氧化能力，能够有效地光催化降解亚甲基蓝。 |
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clearsky7228
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ygb7086(金币+10,VIP+0): 9-10 08:37
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| 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. |
2楼2009-09-09 11:22:47
jw227
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ygb7086(金币+13,VIP+0): 9-10 08:37
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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 ] |
3楼2009-09-09 11:25:47