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Investigation on particle properties and extent of functionalization of silica nanoparticles
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- Idris, Alamin (author)
- Universiti Teknologi PETRONAS, MYS
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- Man, Zakaria (author)
- Universiti Teknologi PETRONAS, MYS
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- Maulud, Abdulhalim S. (author)
- Universiti Teknologi PETRONAS, MYS
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- (creator_code:org_t)
- Elsevier, 2020
- 2020
- English.
- In: Applied Surface Science. - : Elsevier. - 0169-4332 .- 1873-5584. ; 506
- Journal article (peer-reviewed)
Abstract
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- Quantification of the extent of functionalization on silica nanoparticle surface is crucial in a variety of applications. This work aims to evaluate particle properties and extent of functionalization on silica nanoparticles synthesized under acidic and basic conditions via co-condensation of tetraethyl orthosilicate with 3-aminopropyltrimethoxysilane in the sol-gel process. The silica nanoparticles properties were analyzed via field emission scanning electron microscope, transmission electron microscopy, dynamic light scattering, and Brunauer-Emmett-Teller methods; whereas, the extent of functionalization was evaluated using Fourier transform infrared spectroscopy, X-ray photoelectron spectrometer, and thermogravimetric analyzer. Results showed that the functionalized silica nanoparticles have a lower tendency to agglomerate and highly monodispersed as compared to unfunctionalized. The surface areas of acid and base-catalyzed nanoparticles were obtained as 618.8 and 514.7â¯m2/g, respectively. FTIR spectra, XPS scans, and TGA curves confirmed the presence of alkyl and amine functional groups on the functionalized surfaces. The extent of functionalization (N/Si) was obtained as 0.296 and 0.196, and the percentages of functional groups attached on the surface were found to be 6.80 and 5.92% for acid and base-catalyzed nanoparticles, respectively. The overall results suggest that acidic catalysis is a better approach for the synthesis of surface-modified or organofunctionalized silica nanoparticles.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
Keyword
- 3-aminopropyltrimethoxysilane
- Co-condensation
- Extent of functionalization
- Particle properties
- Silica nanoparticles
- Sol-gel process
- Chemical Engineering
- Kemiteknik
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- ref (subject category)
- art (subject category)
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