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| 论文编号: |
O120090053 |
| 第一作者所在部门: |
610组 |
| 中文论文题目: |
Isocyanate-modified TiO2 visible-light-activated photocatalyst
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| 英文论文题目: |
Isocyanate-modified TiO2 visible-light-activated photocatalyst
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| 论文题目英文: |
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| 作者: |
姜 东 徐 耀 吴 东孙予罕
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| 论文出处: |
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| 刊物名称: |
Applied Catalysis B: Environmental
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| 年: |
2009
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| 卷: |
88 |
| 期: |
1-2 |
| 页: |
165-172 |
| 联系作者: |
徐 耀 孙予罕 |
| 收录类别: |
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| 影响因子: |
4.853
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| 摘要: |
Visible-activated TiO2 photocatalysts were prepared by surface modification to TiO2 with different
isocyanates, including conjugated structured Tolylene-2,4-diisocyanate (TDI) and unconjugated
structured m-Xylylene diisocyanate (m-XDI). These two isocyanates could be anchored on the TiO2
surface via p-conjugated chemical bonds of –NHCOOTi, which were formed through the reaction
between –NCO groups of isocyanates and the hydroxyl groups of TiO2, and confirmed by FT-IR, XPS and
UV–Vis spectra. As a result, donor–acceptor type p-conjugated systems came into being between
isocyanate and TiO2. Because the TDI molecules were conjugated themselves, perfect p-conjugated
systems were produced in TDI-modified TiO2 samples. Nevertheless, m-XDI-modified TiO2 samples
showed poor p-conjugation due to the lack of conjugation of m-XDI. Therefore, TDI-modified TiO2
materials exhibited stronger visible absorption than m-XDI-modified TiO2 in the range from 400 to
600 nm. Methylene blue, as a photodegradation target, was used to evaluate the photocatalytic
performance, TDI-modified TiO2 materials exhibited higher photocatalytic activity than m-XDImodified
TiO2 and unmodified TiO2.Moreover, the higher dosage of isocyanatewould lead to the better
photocatalytic activity. |
| 英文摘要: |
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