NDLI: Preparation of glycine–modified silica nanoparticles for the adsorption of malachite green dye

Content Provider	Springer Nature Link
Author	Mansa, Rachel F. Sipaut, Coswald S. Rahman, Ismail A. Yusof, Nur Sabrina M. Jafarzadeh, Mohammad
Copyright Year	2015
Abstract	Organo-functionalized silica nanoparticles were prepared using an in situ modified sol–gel process (hydrolysis–esterification–condensation). This was accomplished under basic conditions by the addition of glycine as a modifier. Evidence of glycine presence was supported by Fourier Transform Infrared (FT-IR) spectroscopy and thermogravimetric analysis (TGA). The addition of 10 wt% glycine into the silica precursor (tetraethoxysilane), in ethanol or methanol media, resulted in a small particle size with a narrow particle size distribution and a high surface area. This is known as a mesoporous structure with a high adsorption volume. Adsorption behavior of the glycine-modified silica nanoparticles was then investigated using a malachite green (MG) dye. Adsorption capacity was raised by increasing the amount of glycine modified silica, MG concentration, and contact time. The Langmuir adsorption isotherm gave the best fit to the experimental data, suggesting monolayer adsorption on a homogenous surface. Adsorption kinetics were predicted by the pseudo-first order kinetic model rather than the pseudo-second order kinetic model, in which the values of adsorption capacity between the theoretical and experimental were more consistent.
Starting Page	35
Ending Page	46
Page Count	12
File Format	PDF
ISSN	13802224
Journal	Journal of Porous Materials
Volume Number	23
Issue Number	1
e-ISSN	15734854
Language	English
Publisher	Springer US
Publisher Date	2015-08-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Modified silica Glycine Modified sol–gel Malachite green Adsorption Catalysis Characterization and Evaluation of Materials Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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