摘要
聚丙烯腈、N,N-二甲基甲酰胺和钛酸四丁脂水解溶胶的混合液通过静电纺丝、预氧化、炭化、活化制备TiO2/活性炭复合纳米纤维膜.基于静态吸附试验,考察了不同TiO2/活性炭复合纳米纤维膜投加量、亚甲基蓝初始质量浓度、温度、pH值条件下,TiO2/活性炭复合纳米纤维膜对亚甲基蓝的吸附性能,并用Langmuir等温吸附方程、Freundlich等温吸附方程、准一级动力学方程,准二级动力学方程、颗粒内扩散方程进行了拟合,结果表明,Freundlich经验公式、准二级动力学方程能较好地描述TiO2/活性炭复合纳米纤维膜对亚甲基蓝的吸附行为.研究表明,吸附量随温度升高而增加,吸附效率受颗粒内扩散影响.无论是紫外光还是太阳光照射,TiO2/活性炭复合纳米纤维膜都具有很好的光催化再生性能.
TiO2/activated carbon composite nano-fiber membrane was prepared via electrospinning of mixture of PAN （polyacrylonitrile）, DMF （N, N-Dimethyl formamide） and hydrolyzed Ti （ET）4, pre-oxidation, carbonization, and activation. The influence of initial adsorbent dose, concentration, temperature, and pH on the adsorption of methylene blue onto TiO2/activated carbon composite nano-fiber membrane was investigated. In addition, the kinetic data were fitted by Langmuir isotherm model, Freundlich isotherm model, pseudo-first- order equation, pseudo-second-order equation, and intra-particle diffusion model. The results showed that Freundlich isotherm model, and the pseudo-second-order equation could be applied to describe the adsorption behavior. It was found that the maximum adsorption capacity of methylene blue increased with the temperature and the intra-particle diffusion affected the adsorption rate. TiO2/activated carbon composite nano-fiber membrane could be regenerated using solar energy or UV light. It retained high photocatalytic regenerated activity even using solar or UV light.
出处
《东华大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第1期71-76,共6页
Journal of Donghua University(Natural Science)
基金
中央高校基本科研业务费专项资金资助项目(9D11301)
上海市重点学科建设基金资助项目(B604)
关键词
TIO2
活性炭
纳米纤维膜
吸附动力学
亚甲基蓝
TiO2
activated carbon
nano-fiber membrane
adsorption kinetics
methylene blue
