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Equilibrium and kinetic study of novel methyltrimethoxysilane magnetic titanium dioxide nanocomposite for methylene blue adsorption from aqueous media
Author(s) -
Alizadeh Eslami Parvin,
Kamboh Mohammad Afzal,
Rashidi Nodeh Hamid,
Wan Ibrahim Wan Aini
Publication year - 2018
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4331
Subject(s) - chemistry , adsorption , thermogravimetric analysis , nanocomposite , titanium dioxide , aqueous solution , fourier transform infrared spectroscopy , langmuir adsorption model , methylene blue , methyltrimethoxysilane , nuclear chemistry , scanning electron microscope , photocatalysis , chemical engineering , materials science , organic chemistry , catalysis , coating , composite material , engineering
Novel magnetic titanium dioxide nanoparticles decorated with methyltrimethoxysilane (Fe 3 O 4 @TiO 2 ‐MTMOS) were successfully fabricated via a sol–gel method at room temperature. The synthesized material was characterized using Fourier transform infrared spectroscopy, X‐ray diffraction, scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, thermogravimetric analysis and vibrating sample magnetometry. The removal efficiency of the adsorbent was evaluated through the adsorption of methylene blue (MB) dye from water samples. The adsorption isotherm and kinetics were evaluated using various models. The Langmuir model indicated a high adsorption capacity (11.5 mg g −1 ) of Fe 3 O 4 @TiO 2 ‐MTMOS. The nanocomposite exhibited high removal efficiency (96%) and good regeneration (10 times) compared to Fe 3 O 4 and Fe 3 O 4 @TiO 2 at pH = 9.0. Based on the adsorption mechanism, electrostatic interaction plays a main role in adsorption since MB dye is cationic in nature at pH = 9, whereas the adsorbent acquired an anionic nature. The newly synthesized Fe 3 O 4 @TiO 2 ‐MTMOS can be used as a promising material for efficient removal of MB dye from aqueous media.