期刊
DESALINATION AND WATER TREATMENT
卷 86, 期 -, 页码 165-173出版社
DESALINATION PUBL
DOI: 10.5004/dwt.2017.20907
关键词
Adsorption; Bromophenol blue; Composite; ZIF-9; ZIF-9@SiO2; Zeolitic imidazolate framework
资金
- Research Council of Islamic Azad University of Yazd
The zeolitic imidazolate framework (ZIF-9) and ZIF-9@SiO2 composite were prepared and characterized by Fourier transform infrared (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). Results of FTIR and XRD confirmed the formation of ZIF-9 and ZIF-9@SiO2. The morphology of ZIF-9@SiO2 was examined by SEM. TEM results showed particle size of 20 nm for ZIF-9@SiO2. The adsorptive properties of bromophenol blue (BPB) based on ZIFs were studied. Adsorption of BPB onto ZIFs was fitted well by pseudo-second-order kinetic model. The adsorption process was followed by Langmuir isotherm model. The maximum adsorption capacity was found to be 122 mg g(-1) at contact time 30 min and pH 3. Adsorption thermodynamics of the BPB adsorption to ZIF-9@SiO2 was studied and the results showed that the process is spontaneous.
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