小型光催化滤池降解SDBS的实验研究
Experimental Study on the Degradation of SDBS Using a Small Photocatalytic Filter

作者: 郝希龙 , 王明花 , 张宏忠 * , 康雪晶 , 赵继红 :郑州轻工业学院材料与化学工程学院,郑州,中国,450000;

关键词: 光催化滤池SDBS降解吸附光电化学测试Photocatalytic Filter SDBS Degradation Adsorption Photoelectrochemistry Test

摘要:
利用小型光催化滤池对十二烷基苯磺酸钠(SDBS)进行了光催化氧化降解实验。结果表明,在中性及酸性条件下,SDBS降解率保持在70%左右;当pH > 9.0时,SDBS降解率随pH的升高而下降;当水体温度为50℃时,SDBS的降解效率最高。光电催化测试结果表明,预吸附时间为700 s时,水和SDBS分子在TiO2膜表面的吸附达到饱和,此时的积分电量分别为235 μC和91 μC;SDBS吸附较快,为多分子层吸附。从微观角度探讨了光催化膜表面吸附降解SDBS的过程和机理。

Abstract:
The degradation experiments of sodium dodecyl benzene sulfonate (SDBS) were performed in this work by catalytic oxidation using a small photocatalytic filter. The results show that the degradation rate of SDBS keeps the value of about 70% when pH ≤ 9.0 while the value can decrease with the increase of pH once pH > 9.0, and the efficient degradation of SDBS can be received at 50℃. The test results of photoelectrochemistry also indicate that the adsorption of both water and SDBS molecules on the surface of nano TiO2 film would be saturated when the pre-adsorption time is 700 s with the integral electricity quantity of 235 μC and 91 μC, respectively. It is proved that the adsorption of SDBS molecules is a fast process with multiple layers on the surface of film. Furthermore, we discussed the adsorption process and mechanism of photocatalytic degradation about SDBS molecules in microcosmic level.

文章引用: 郝希龙 , 王明花 , 张宏忠 , 康雪晶 , 赵继红 (2013) 小型光催化滤池降解SDBS的实验研究。 环境保护前沿, 3, 36-39. doi: 10.12677/AEP.2013.31B009

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