eprintid: 6380
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/63/80
datestamp: 2023-11-09 16:18:09
lastmod: 2023-11-09 16:18:09
status_changed: 2023-11-09 16:05:52
type: article
metadata_visibility: show
creators_name: Irfan Khan, M.
creators_name: Azizli, K.
creators_name: Sufian, S.
creators_name: Man, Z.
creators_name: Khan, A.S.
title: Simultaneous preparation of nano silica and iron oxide from palm oil fuel ash and thermokinetics of template removal
ispublished: pub
keywords: Activation energy; Chemical bonds; Drug delivery; Filtration; Iron; Leaching; Nanofluidics; Nanoparticles; Oil shale; Palm oil; Silica; Surface active agents, Chemical bondings; De agglomerations; Fourier transform infrared spectra; Model free kinetics; Polymeric surfactant; Silica composites; Silica nanoparticles; Thermodynamic studies, Iron oxides
note: cited By 29
abstract: Nanomaterials have potential applications in the fields of catalysis, drug delivery, nanocomposites, and nanofluids. This study suggests a method for simultaneous preparation of nano silica and iron oxide from palm oil fuel ash (POFA). First, POFA was leached out with H2SO4 followed by alkali (NaOH) leaching. Basification (pH = 14) of the filtrate of the first leaching process produced iron oxide, while acidification of the alkali leachate produced nano silica. Addition of polymeric surfactant polyethylene glycol (PEG MW 20 000) resulted in deagglomeration of the silica nanoparticles. Silica nanoparticles with sizes in the range of 20-80 nm, surface area of 326 m2 g-1, and pore diameter of 8.2 nm were obtained. Thermokinetic and thermodynamic studies of template (PEG) removal from the silica matrix were performed using the Kissinger and Ozawa methods based on model-free kinetics. The activation energy of PEG decreased from 330 kJ mol-1 to 140 kJ mol-1 when it was used as a template; this result demonstrates the lack of chemical bonding between the surfactant and silica. The findings are supported by the Fourier-transform infrared spectra of the PEG-silica composites. This journal is © The Royal Society of Chemistry 2015.
date: 2015
publisher: Royal Society of Chemistry
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923902316&doi=10.1039%2fc4ra15922e&partnerID=40&md5=62fbad8d67196de8a38824b90ff574a0
id_number: 10.1039/c4ra15922e
full_text_status: none
publication: RSC Advances
volume: 5
number: 27
pagerange: 20788-20799
refereed: TRUE
issn: 20462069
citation:   Irfan Khan, M. and Azizli, K. and Sufian, S. and Man, Z. and Khan, A.S.  (2015) Simultaneous preparation of nano silica and iron oxide from palm oil fuel ash and thermokinetics of template removal.  RSC Advances, 5 (27).  pp. 20788-20799.  ISSN 20462069