| 二氧化钛光催化还原Cr(Ⅵ)的研究 |
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| 引用本文： | 鲁秀国,翟永青,丁士文,赵文革.二氧化钛光催化还原Cr(Ⅵ)的研究[J].河北大学学报(自然科学版),2000,20(1):33-37. |
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| 作者姓名： | 鲁秀国 翟永青 丁士文 赵文革 |
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| 作者单位： | 河北大学,化学系,河北,保定,071002 |
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| 基金项目： | 河北省教委博士基金，， |
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| 摘 要： | 用自制二氧化钛粉末光催化剂成功地处理了含Cr(Ⅵ)废水。提出了Cr(Ⅵ)光致还原的最佳条件,确立了当溶液酸度为0.5mol/LH2SO4,Cr(Ⅵ)质量浓度为80mg/L的50mL废水,催化剂用量为0.3g,光照时间4.0h时,Cr(Ⅵ)的光致还原率达95.0 %以上。同时对光催化转化Cr(Ⅵ)的机理进行了初步探讨,证明Cr(Ⅵ)的TiO2 光致还原遵循一级反应速率公式:lnC= -0.88t +4.38。
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| 关 键 词： | 二氧化钛(TiO_2) 光催化 光致还原 Cr(Ⅵ) |
| 文章编号： | 1000-1565(2000)01-0033-05 |
| 修稿时间： | 1999-05-20 |
Study on TiO 2 Photocatalysis Reduction of Cr(Ⅵ) |
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| LU Xiu-guo,ZHAI Yong-qing,DING Shi-wen,ZHAO Wen-ge.Study on TiO 2 Photocatalysis Reduction of Cr(Ⅵ)[J].Journal of Hebei University (Natural Science Edition),2000,20(1):33-37. |
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| Authors: | LU Xiu-guo ZHAI Yong-qing DING Shi-wen ZHAO Wen-ge |
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| Institution: | LU Xiu-guo
,ZHAI Yong-qing
,DING Shi-wen
,ZHAO Wen-ge
(Department of Chemistry,Hebei University,Baoding 071002,China) |
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| Abstract: | The waste water including Cr(Ⅵ) has been handled by photocatalyst-the powder of TiO2. The optimum photo reduction conditions are as follows: the acidity of the aqueous solution is 0.5 mol/L H2SO4, the mass concentration of Cr(Ⅵ) is 80 mg/L and its volume is 50 mL, the quantity of catalyst is 0.3 g, the time of photo radiation is 4.0 h, the photo reduction ratio of Cr(Ⅵ) is over 95.0%. At the same time, the mechanism of photocatalytic conversion of Cr(Ⅵ) has been preliminarily probed, and it is proved that TiO2 photo reduction of Cr(Ⅵ) follows the formula of one-order reaction rate:lnC=-0.88t+4.38. |
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| Keywords: | titanium dioxide(TiO2) photocatalysis photoreduction chromium(Ⅵ) |
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