摘要
在水热法制备钛酸纳米管(Titanate nanotubes,TNTs)的基础上,再通过浸渍法将硫辛酸(Lipoic acid,LA)修饰到钛酸纳米管上,得到硫辛酸修饰的钛酸纳米管(TNTs-LA)。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、X光电子能谱仪(XPS)和傅里叶变换红外光谱(FT-IR)等仪器对材料进行表征,并以亚甲基蓝(MB)的吸附实验评价其吸附性能。结果表明,TNTs-LA对MB的吸附主要集中于前30 min,60 min可达吸附平衡。MB的去除与溶液p H值有关,且符合二级反应动力学方程,吸附过程是一个多种机制共同作用的结果。Langmuir等温模型拟合得出TNTs-LA对MB的最大吸附量为216.98 mg/g,有较高的吸附能力。
In this paper,titanate nanotubes(TNTs)are prepared by hydrothermal method,and then the titanate nanotubes(TNTs-LA)are modified with lipoic acid by impregnation method.The structure of TNTs-LA is characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS)and infrared spectroscopy(FT-IR),and the adsorption performance of methylene blue(MB)is evaluated.The results show that the adsorption performance of titanate nanotubes modified with lipoic acid is obviously enhanced.The removal of MB is also related to the pH of solution.The kinetic study shows that the adsorption kinetics of MB by titanate nanotubes accords with the second-order kinetic equation.The maximum adsorption capacity of MB on TNTs-LA is 216.98 mg/g by Langmuir adsorption isotherm model.
作者
郝晨丽
丁庆伟
贾世昌
毛泱博
王松柏
马骏
HAO Chen-Li;DING Qing-Wei;JIA Shi-Chang;MAO Yang-Bo;WANG Song-Bai;MA Jun(School of Environment and Resources,Taiyuan University of Science and Technology,Taiyuan 030024,China;Engineering Research Center of Heavy Machinery of Ministry of Education,Taiyuan University of Science and Technology,Taiyuan 030024,China;School of Chemistry and Chemical Engineering,Shanxi University,Taiyuan 030006,China)
出处
《应用化学》
CAS
CSCD
北大核心
2023年第5期749-757,共9页
Chinese Journal of Applied Chemistry
基金
山西省回国留学人员科研项目(Nos.2021-011,HGKY2019082)
山西省自然科学基金(No.201901D111249)
太原科技大学博士科研启动基金(No.20192012)
国家级山西省大学生创新创业训练计划项目资助(No.202210109014)资助。
关键词
钛酸纳米管
硫辛酸
亚甲基蓝
吸附
Titanate nanotubes
Lipoic acid
Methylene blue
Adsorption
