relation: https://khub.utp.edu.my/scholars/13340/
title: Investigation on particle properties and extent of functionalization of silica nanoparticles
creator: Idris, A.
creator: Man, Z.
creator: Maulud, A.S.
creator: Bustam, M.A.
creator: Mannan, H.A.
creator: Ahmed, I.
description: 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 514.7 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. © 2019 Elsevier B.V.
publisher: Elsevier B.V.
date: 2020
type: Article
type: PeerReviewed
identifier:   Idris, A. and Man, Z. and Maulud, A.S. and Bustam, M.A. and Mannan, H.A. and Ahmed, I.  (2020) Investigation on particle properties and extent of functionalization of silica nanoparticles.  Applied Surface Science, 506.   ISSN 01694332     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85076474092&doi=10.1016%2fj.apsusc.2019.144978&partnerID=40&md5=a60051413d9839b0fcdae20b6465f7f2
relation: 10.1016/j.apsusc.2019.144978
identifier: 10.1016/j.apsusc.2019.144978