| 在CdS水悬浮液中O2光吸收的pH效应 |
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| 引用本文： | 席婵娟,李庆霖,金振声. 在CdS水悬浮液中O2光吸收的pH效应[J]. 影像科学与光化学, 1994, 12(2): 177-181. DOI: 10.7517/j.issn.1674-0475.1994.02.177 |
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| 作者姓名： | 席婵娟 李庆霖 金振声 |
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| 作者单位： | 中国科学院兰州化学物理研究所 兰州 730000 |
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| 摘 要： | 为了深入了解间接光腐蚀过程, Grätzel等人曾考察过O2在CdS和Rh203/CdS悬浮液(pH=9)中光吸收行为, 发现光照生成的SO42-的µmol数值基本上为加入O2的µmol数值的一半, 且反应后悬浮液的pH降低[3]。
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| 关 键 词： | 光吸收 光腐蚀 硫化镉 |
| 收稿时间： | 1993-03-29 |
pH EFFECT OF 02 PHOTOUPTAKE IN AQUEOUS SUSPENSION OF CdS |
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| Abstract: | The pH effect of photouptake of O2 on CdS and Pt/CdS was investigated. The resultindicates that there are two types of mechanism for O2 photouptake aqueous dispersions of CdS and Pt/CdS. In acidic condition,O2 photouptake proceeds continuously and canbe described with 1st order rate equation. In basic condition,O2 photouptake ceaises afterhalf an hour irradiation,which is illustrated by following equations: CdS+2O22-+2h+→Cd2++SO42- Cd2++2OH-→Cd(OH)2 Then,the surface of CdS is covered by Cd(OH)2 and the O2 uptake is hindered. |
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| Keywords: | photouptake photocorrosion cadmium sulfide |
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