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Title: Surface and related bulk properties of titania nanoparticles recovered from aramid–titania hybrid films: A novel attempt

Abstract

Highlights: ► Aramid–titania hybrid films (5 and 10 wt%-TiO{sub 2}) were prepared via sol–gel processing. ► 450 °C calcination of the films yield anatase-TiO{sub 2} nanoparticles of rod-like morphology. ► The titania nanoparticle, crystal structure, high surface area are stable up to 800 °C. ► The novel approach has the advantage of nearly 100% recovery of titania. ► Increasing calcination temperature up to 1100 °C triggers anatase → rutile transition. -- Abstract: 5 and 10 wt%-TiO{sub 2}-containing aramid–titania hybrid films were prepared using sol–gel processing improved by the inclusion of 3-isocyanato-propyltriethoxysilane (ICTOS) to strengthen bonding of the titania species to the polymer backbone and, hence, lessen its agglomeration. The films were thermally degraded by heating at 450 °C in a dynamic atmosphere of air. The solid residues were found by thermogravimetry, X-ray diffractometry and electron microscopy to consist dominantly of uniformly agglomerated rod-like anatase-TiO{sub 2} nanoparticles, irrespective of the titania content of the film. The recovered titania particle morphology and surface microstructure were examined by field emission scanning and high-resolution transmission electron microscopy, respectively. Whereas, the particle surface chemistry and texture were assessed, respectively, by means of X-ray photoelectron spectroscopy and N{sub 2} sorptiometry. The recovered titanias were found, irrespectivemore » of the film content of titania, to enjoy not only a high temperature (up to 800 °C) stable nanoscopic anatase bulk structure, but also a high-temperature stable surface chemical composition (lattice Ti{sup 4+} and O{sup 2−}, and adsorbed OH/CH{sub x} species), (101)-faceted microstructure and highly accessible (145–112 m{sup 2}/g), uniform mesoporous texture with average pore diameter in the narrow range of 3.9–6.3 nm. Increasing the calcination temperature up to 1100 °C enhances an anatase → rutile transition, the extent of which is larger the higher the titania content of the film.« less

Authors:
;  [1];  [1];  [2]
  1. Chemistry Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, State of Kuwait (Kuwait)
  2. Chemistry Department, Faculty of Science, Minia University, El-Minia 61519 (Egypt)
Publication Date:
OSTI Identifier:
22215567
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 47; Journal Issue: 11; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; AGGLOMERATION; CRYSTAL STRUCTURE; FIELD EMISSION; FILMS; HYBRIDIZATION; MICROSTRUCTURE; NANOSTRUCTURES; RUTILE; SURFACE AREA; SURFACES; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Al-Omani, Sara J., Bumajdad, Ali, Al Sagheer, Fakhreia A., E-mail: f.alsagheer@ku.edu.kw, and Zaki, Mohamed I., E-mail: mizaki@link.net. Surface and related bulk properties of titania nanoparticles recovered from aramid–titania hybrid films: A novel attempt. United States: N. p., 2012. Web. doi:10.1016/J.MATERRESBULL.2012.07.033.
Al-Omani, Sara J., Bumajdad, Ali, Al Sagheer, Fakhreia A., E-mail: f.alsagheer@ku.edu.kw, & Zaki, Mohamed I., E-mail: mizaki@link.net. Surface and related bulk properties of titania nanoparticles recovered from aramid–titania hybrid films: A novel attempt. United States. doi:10.1016/J.MATERRESBULL.2012.07.033.
Al-Omani, Sara J., Bumajdad, Ali, Al Sagheer, Fakhreia A., E-mail: f.alsagheer@ku.edu.kw, and Zaki, Mohamed I., E-mail: mizaki@link.net. Thu . "Surface and related bulk properties of titania nanoparticles recovered from aramid–titania hybrid films: A novel attempt". United States. doi:10.1016/J.MATERRESBULL.2012.07.033.
@article{osti_22215567,
title = {Surface and related bulk properties of titania nanoparticles recovered from aramid–titania hybrid films: A novel attempt},
author = {Al-Omani, Sara J. and Bumajdad, Ali and Al Sagheer, Fakhreia A., E-mail: f.alsagheer@ku.edu.kw and Zaki, Mohamed I., E-mail: mizaki@link.net},
abstractNote = {Highlights: ► Aramid–titania hybrid films (5 and 10 wt%-TiO{sub 2}) were prepared via sol–gel processing. ► 450 °C calcination of the films yield anatase-TiO{sub 2} nanoparticles of rod-like morphology. ► The titania nanoparticle, crystal structure, high surface area are stable up to 800 °C. ► The novel approach has the advantage of nearly 100% recovery of titania. ► Increasing calcination temperature up to 1100 °C triggers anatase → rutile transition. -- Abstract: 5 and 10 wt%-TiO{sub 2}-containing aramid–titania hybrid films were prepared using sol–gel processing improved by the inclusion of 3-isocyanato-propyltriethoxysilane (ICTOS) to strengthen bonding of the titania species to the polymer backbone and, hence, lessen its agglomeration. The films were thermally degraded by heating at 450 °C in a dynamic atmosphere of air. The solid residues were found by thermogravimetry, X-ray diffractometry and electron microscopy to consist dominantly of uniformly agglomerated rod-like anatase-TiO{sub 2} nanoparticles, irrespective of the titania content of the film. The recovered titania particle morphology and surface microstructure were examined by field emission scanning and high-resolution transmission electron microscopy, respectively. Whereas, the particle surface chemistry and texture were assessed, respectively, by means of X-ray photoelectron spectroscopy and N{sub 2} sorptiometry. The recovered titanias were found, irrespective of the film content of titania, to enjoy not only a high temperature (up to 800 °C) stable nanoscopic anatase bulk structure, but also a high-temperature stable surface chemical composition (lattice Ti{sup 4+} and O{sup 2−}, and adsorbed OH/CH{sub x} species), (101)-faceted microstructure and highly accessible (145–112 m{sup 2}/g), uniform mesoporous texture with average pore diameter in the narrow range of 3.9–6.3 nm. Increasing the calcination temperature up to 1100 °C enhances an anatase → rutile transition, the extent of which is larger the higher the titania content of the film.},
doi = {10.1016/J.MATERRESBULL.2012.07.033},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 11,
volume = 47,
place = {United States},
year = {2012},
month = {11}
}