TNTs@CF吸附-紫外光催化降解亚甲基蓝

Study of Active Carbon Fibre/Titanate Nanotubes for Photocatalytic Degradation of Methylene Blue

针对印染废水处理过程中,吸附完成后吸附剂难以和污染物分离的问题,本研究采用水热法合成负载钛酸纳米管的碳纤维(TNTs@CF),研究亚甲基蓝(MB)在TNTs@CF上的吸附-紫外光催化性能。考察不同初始浓度、不同TNTs@CF用量、不同pH等对MB的吸附-紫外光催化性能的影响;探讨TNTs@CF的循环利用能力;结果表明,MB在TNTs@CF上的吸附动力学过程迅速,30 min即可达到吸附平衡,Langmuir等温模型拟合所得最大吸附量达395.26 mg.g-1;当MB初始浓度为20 mg/L,附着在TNTs@CF的MB在30 min内脱色率可达90%,紫外光照射后可继续部分降解。5次循环后材料对MB的吸附-紫外光降解性能良好。本研究制备一种具备染料吸附-紫外光催化降解性能的碳纤维,对于印染废水处理和纳米材料的环境污染治理应用具有一定的借鉴意义。

In this study, the problem of the separation of pollutants to the completed agent adsorption in the the printing and dyeing waste water treatment process was treated, carbon fiber supported titanate nanotubes（TNTs@CF） were synthesized by hydrothermal method, the research is about methylene blue（MB） adsorption and UV catalytic performance on TNTs@CF. The effect of different initial concentration, different dosage of TNTs@CF and different pH on the adsorption and UV catalytic performance of MB; the recycling capacity of TNTs@CF was discussed; the results show that the adsorption kinetics of TNTs@CF on the MB process was so fast and it could reach equilibrium in 30 minutes, the maximum adsorption capacity of the Langmuir isotherm model was 395.26 mg.g-1; when the initial concentration of MB is 20 mg/L, the decolorization rate of the MB attached to the TNTs@CF is up to 90%,30 min later the degradation of MB could increase under the UV irradiation. After five cycles, the adsorption and ultraviolet degradation of MB are good. In this study, a kind of carbon fiber with dye adsorption and ultraviolet photocatalytic degradation property was prepared. It has certain reference significance for the treatment of printing and dyeing waste water and the treatment of environmental pollution of nanomaterials.