研究了对羟基苯甲酸存在下TiO2光催化还原Cr(Ⅵ)过程中不同对羟基苯甲酸浓度、 Cr(Ⅵ)初始浓度及溶液初始pH值对Cr(Ⅵ)光降解速率的影响, 认为TiO2悬浮体系能有效地光催化还原水溶液中的Cr(Ⅵ)离子, 并得出TiO2光催化还原Cr(Ⅵ)过程符合L-H动力学模型. 反应体系中的Cr(Ⅵ)初始浓度及初始pH值对TiO2光催化还原Cr(Ⅵ)过程的速率有较大的影响. 酸性条件有利于Cr(Ⅵ)的光催化还原. 对羟基苯甲酸具有芳香族化合物的特殊结构, 对TiO2光催化还原Cr(Ⅵ)过程有显著的促进作用.
参考文献
| [1] | COLON G;Hidalgo M C;Navio J A .Photocatalytic deactivation of commercial TiO2 samples during simultaneous photoreduction of Cr(Ⅵ) and photooxidation of salicylic acid[J].Journal of Photochemistry and Photobiology A:Chemistry,2001,138:79. |
| [2] | COLON G;Hidalgo M C .Photocatalytic deactivation of commercial TiO2 samples during simultaneous photoreduction of Cr(Ⅵ) and photooxidation of salicylic acid[J].Journal of Photochemistry and Photobiology A:Chemistry,2001,138:79. |
| [3] | 傅宏祥;吕功煊;李树本 .有机物存在下Cr6+离子的光催化还原[J].物理化学学报,1997,13(02):106. |
| [4] | Fu H X;Lu G X;Li S B .Adsorption and photoinduced reduction of Cr(Ⅵ)-4cp aqueous system in the presence of TiO2 as photocatalyst[J].Journal of Photochemistry and Photobiology A:Chemistry,1998,114:81. |
| [5] | OLLIS D F .Contaminant degradation in water, Heterogeneous photocatalysis degrades halogenated hydrocarbon contaminants[J].Environmental Science and Technology,1985,19:480. |
| [6] | San N;Halipoglu A;Kocturk G .Prediction of primary intermediates and the photodegradation kineties of 3-aminophenol in aqueous TiO2 suspensious[J].Journal of Photochemistry and Photobiology A:Chemistry,2000,124:80. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%