材料科学

Vol.2 No.2 (April 2012)

Ti-DBS-LDHs光催化除去印染污水中的孔雀石绿
Ti-DBS-LDHs as a Photocatalyst under Simulated Solar Radiation for Removal of Malachite Green

 

作者:

陈春霞 , 乔淇 , 郭涛 , 吕占傲 , 李斌

 

关键词:

LDHs微波晶化DBS孔雀石绿光催化Layered Double Hydroxides (LDHs) Dodecyl Benzene Sulfonate (DBS) Malachite Green (MG) Microwave Irradiation Photocatalyst

 

摘要:

本文采用低饱和态共沉淀法,辅助微波手段,快速制备了具有膜片结构的十二烷基苯磺酸钠(DBS)改性的含钛层状双氢氧化物(Ti-DBS-LDHs),并将其用于孔雀石绿(MG)的废水处理中,光催化条件下,考察了MG的初始浓度、Ti-DBS-LDHs催化剂投加量、催化剂重复利用等一系列影响因素,探索了最佳工艺。在MG的浓度50 mg•L–1、催化剂的用量是200 mg•L–1、150 W的灯照射1个小时的条件下,MG可达到完全脱色。并且Ti-DBS-LDHs可重复利用,重复使用3次,其平均脱色率为89.37%。

Ti-DBS-LDHs were fleetly prepared by the technology of the microwave-crystallization and low saturated state of coprecipitation. The purposed samples were characterized by XRD and SEM. The results show that the synthesized Ti-DBS-LDHs with the slice layer have the structure of LDHs, indicating their preparations are successful under microwave irradiation. Ti-DBS-LDHs was then applied to the decolorization of malachite green (MG). The effects of Ti/Mg molar ratio, MG concentration, catalyst dosage, dye type and circle life on the decolorization were investigated. It is shown the percentage of decolorization can reach 100% under the optimum conditions. In addition, Ti-DBS-LDHs was reusable, the average decolorization percentage of 89.37% could be obtained, the decolorization performance was stable after 3 times usage without significant loss of its decolorization activity. Therefore, Ti-DBS-LDHs is a novel and efficient photocatalyst for the decolorization of MG.

文章引用:

陈春霞 , 乔淇 , 郭涛 , 吕占傲 , 李斌 (2012) Ti-DBS-LDHs光催化除去印染污水中的孔雀石绿。 材料科学, 2, 63-67. doi: 10.12677/ms.2012.22011

 

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