Chinese Journal of Applied Chemistry ›› 2023, Vol. 40 ›› Issue (5): 749-757.DOI: 10.19894/j.issn.1000-0518.220406

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Adsorption of Methylene Blue on Titanate Nanotubes Modified with Lipoic Acid

Chen-Li HAO1, Qing-Wei DING1, Shi-Chang JIA1, Yang-Bo MAO2, Song-Bai WANG3, Jun MA1()   

  1. 1.School of Environment and Resources,Taiyuan University of Science and Technology,Taiyuan 030024,China
    2.Engineering Research Center of Heavy Machinery of Ministry of Education,Taiyuan University of Science and Technology,Taiyuan 030024,China
    3.School of Chemistry and Chemical Engineering,Shanxi University,Taiyuan 030006,China
  • Received:2022-12-16 Accepted:2023-03-28 Published:2023-05-01 Online:2023-05-26
  • Contact: Jun MA
  • About author:junma0888@tyust.edu.cn
  • Supported by:
    Shanxi Scholarship Council of China(2021-011);the Natural Science Foundation of Shanxi Province(201901D111249);the Doctoral Starting up Foundation of Taiyuan University of Science and Technology(20192012);the College Student's Innovative Entrepreneurial Training Plan Program(202210109014)

Abstract:

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.

Key words: Titanate nanotubes, Lipoic acid, Methylene blue, Adsorption

CLC Number: