Funct. Mater. 2023; 30 (2): 282-289.
Growth of Fe-BTC particles beneath stearic acid Langmuir monolayers and research on its adsorption of methyl orange
School of Chemistry and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, 132022 Jilin, P.R.China
Langmuir monolayers of stearic acid (SA) were used as a template to induce the nucleation and growth of Fe-BTC microparticles. X-ray diffraction (XRD) patterns, Fourier transform infrared spectroscopy (FTIR), BET and microscopy techniques were employed to investigate the particles. In the absence of the template, the Fe-BTC particles show a bulky morphology, while round-shaped Fe-BTC is nucleated beneath a Langmuir monolayer. The Fe-BTC material has been found to have excellent adsorption properties for the organic dye methyl orange in aqueous solutions, exhibiting both high adsorption capacity and rate. Adsorption capacity of Fe-BTC for Methyl Orange(MO) was retained high and stable in a wide range of pH values from 2 to 9. The adsorption capacity of Fe-BTC for MO is described by a pseudo-second-order model, implying that chemisorption is responsible for the process. The adsorption data were analyzed and found to be in line with the Langmuir isotherm model, indicating the monolayer adsorption.
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