| TiO2光催化染料4BS脱色动力学研究 |
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| 引用本文： | 唐玉朝,黄显怀,黄雪锋. TiO2光催化染料4BS脱色动力学研究[J]. 化学反应工程与工艺, 2006, 22(2): 189-192 |
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| 作者姓名： | 唐玉朝 黄显怀 黄雪锋 |
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| 作者单位： | 安徽建筑工业学院环境工程系,安徽,合肥,230022;中国科学技术大学化学与材料科学学院,安徽,合肥,230026;安徽建筑工业学院环境工程系,安徽,合肥,230022 |
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| 基金项目： | 国家自然科学基金(50478065)，建设部科技开发项目(05-k2-25)，安徽省优秀青年科技基金(04044077)，安徽省科技厅重点科研项目(05022126) |
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| 摘 要： | 以直接耐酸大红4BS为模型化合物,研究了不同紫外光强度下Ti O2催化脱色反应的动力学。实验结果表明,该反应呈现0级动力学特征,与光强、4BS浓度无关。当光强度低于2.08 mW/cm2时,化学试剂Ti O2脱色反应速率与光强度的2/3次方成正比例;而对N掺杂Ti O2,当光强度低于3.48 mW/cm2时,反应速率与光强度的1次方成正比例。在较高的光强下,两种催化剂脱色反应速率都逐渐趋于稳定值,达到光饱和,继续增加光强度,反应速率增加不明显。
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| 关 键 词： | 光催化 二氧化钛 脱色 直接耐酸大红4BS 动力学 |
| 文章编号： | 1001-7631(2006)02-0189-04 |
| 收稿时间： | 2005-08-09 |
| 修稿时间： | 2005-11-15 |
Kinetic Study on Photocatalytic Decoloration of Dye 4BS Red over Titanium Oxide |
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| Tang Yuchao,Huang Xianhuai,Huang Xuefeng. Kinetic Study on Photocatalytic Decoloration of Dye 4BS Red over Titanium Oxide[J]. Chemical Reaction Engineering and Technology, 2006, 22(2): 189-192 |
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| Authors: | Tang Yuchao Huang Xianhuai Huang Xuefeng |
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| Affiliation: | 1. Department of Environmental Engineering, Anhui Institute of Architecture and Industry, Hefei 230022, China; 2. School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, Chins |
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| Abstract: | Photocatalytic decoloration kinetics of dye 4BSred over titaniumoxide were studied underdifferent UVirradiationintensities.The experi mental results showed that dye 4BS red photocatalyticdegradation was zero-order for different reaction conditions.Reaction rates are linearly direct propor-tional tothe 2/3 exponential of thelight intensities for chemical titaniumoxide as catalyst whileirradi-ationintensity was lower than 2.08 mW/cm2.Reaction rates are linearly direct proportional to thelight intensities for nitrogen dopedtitaniumoxide as catalyst whileirradiationintensity waslower than3.48 mW/cm2.Reaction rates no longer increased as the irradiation intensities further increasing forboth titaniumoxide samples. |
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| Keywords: | photocatalysis titaniumoxide decoloration dye 4BS red kinetics |
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