Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 365, Issue -, Pages 597-605Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2018.11.049
Keywords
Toluene vapor; Adsorption; CTAB; Defective UiO-66; Kinetic studies
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Funding
- National Natural Science Foundation of China [21507086, 51508327, 21507109, 21806107, 41673093]
- Shanghai Sailing Program [16YF1408100]
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In this study, defective UiO-66 materials modified with Cetyltrimethylammonium bromide (CTAB) surfactant were successfully synthesized by a simple approach. Adsorption and desorption performance as well as the corresponding kinetics of toluene vapor for UiO-66 and the modified materials were intensively studied. The physical and chemical properties of the sample were obtained by a series of characterization techniques. As indicated by the experiments, the number of missing-linker defect sites in UiO-66 were influenced by the CTAB concentration. The presence of the defect sites was served as the main active adsorption sites for efficient toluene vapor adsorption. In result, adsorptive capacity of toluene over CTAB-U-0.5 was improved to 275 mg g(-1), which was much higher than that of UiO-66 (151 mg g(-5)). The effects of adsorption temperature, initial toluene concentration and relative humidity on the adsorption capacity of 1000 ppm toluene on UiO-66 were further explored. Furthermore, as-prepared CTAB-modified UiO-66 materials were used for reprocessing cycles, which showed excellent regeneration performance.
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