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Dispersion and Stabilization of Photocatalytic TiO2 Nanoparticles in Aqueous Suspension for Coatings Applications
Joint Authors
Abdul Rashid, Suraya
Othman, Siti Hajar
Abdullah, Norhafizah
Mohd Ghazi, Tinia Idaty
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-05-15
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
To produce titanium dioxide (TiO2) nanoparticle coatings, it is desirable that the nanoparticles are dispersed into a liquid solution and remain stable for a certain period of time.
Controlling the dispersion and aggregation of the nanoparticles is crucial to exploit the advantages of the nanometer-sized TiO2 particles.
In this work, TiO2 nanoparticles were dispersed and stabilized in aqueous suspensions using two common dispersants which were polyacrylic acid (PAA) and ammonium polymethacrylate (Darvan C).
The effect of parameters such as ultrasonication amplitude and type and amount of dispersants on the dispersibility and stability of the TiO2 aqueous suspensions were examined.
Rupture followed by erosion was determined to be the main break up mechanisms when ultrasonication was employed.
The addition of dispersant was found to produce more dispersed and more stabilized aqueous suspension.
3 wt.% of PAA with average molecular weight (Mw) of 2000 g/mol (PAA 2000) was determined to produce the best and most stable dispersion.
The suspensions were then coated on quartz glass, whereby the photocatalytic activity of the coatings was studied via the degradation of formaldehyde gas under UV light.
The coatings were demonstrated to be photocatalytically active.
American Psychological Association (APA)
Othman, Siti Hajar& Abdul Rashid, Suraya& Mohd Ghazi, Tinia Idaty& Abdullah, Norhafizah. 2012. Dispersion and Stabilization of Photocatalytic TiO2 Nanoparticles in Aqueous Suspension for Coatings Applications. Journal of Nanomaterials،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-1029262
Modern Language Association (MLA)
Othman, Siti Hajar…[et al.]. Dispersion and Stabilization of Photocatalytic TiO2 Nanoparticles in Aqueous Suspension for Coatings Applications. Journal of Nanomaterials No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-1029262
American Medical Association (AMA)
Othman, Siti Hajar& Abdul Rashid, Suraya& Mohd Ghazi, Tinia Idaty& Abdullah, Norhafizah. Dispersion and Stabilization of Photocatalytic TiO2 Nanoparticles in Aqueous Suspension for Coatings Applications. Journal of Nanomaterials. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-1029262
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1029262