Sol-Gel Thin Films Immobilized with Bromocresol Purple pH-Sensitive Indicator in Presence of Surfactants
Joint Authors
Taya, Sufyan A.
El-Ashgar, Nizam M.
El-Basioni, Ahmed I.
El-Agez, Taher M.
Zourob, Shehata M.
El-Nahhal, Issa M.
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-03-08
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Preparation of transparent sol-gel thin film immobilized with bromocresol purple (BCP) pH-sensitive indicator was made via the acid catalyzed sol-gel reaction of tetraethylorthosilicate and the bromocresol purple indicator (BCP).
Different surfactants include cationic cetyl trimethyl ammonium bromide (CTAB), anionic sodium dodecyl sulfate (SDS), and nonionic Triton X-100 (TX-100) were used to improve the mesostructure of the host material and to increase its porosity.
The color change behavior of the immobilized bromocresol purple indicator affected significantly in presence of SDS comparing with its free counterpart in aqueous solution.
In presence of CTAB and Triton-X 100, the immobilized bromocresol purple indicator shows similar behavior as its free counterpart in aqueous solution.
The BCP retains its structure during the sol-gel reactions in terms of response to pH.
Different parameters including concentration of indicator and surfactant, temperature, number of layers, response time, life time, and the number of measurements were investigated.
The pKa values of the different prepared BCP immobilized thin films were determined.
The BCP thin film sensor showed stability, repeatability, reproducibility, fast response, and long life time behavior.
The polarized light microscopy indicated that the bromocresol purple indicator molecules are distributed uniformly within the host silica network.
American Psychological Association (APA)
El-Ashgar, Nizam M.& El-Basioni, Ahmed I.& El-Nahhal, Issa M.& Zourob, Shehata M.& El-Agez, Taher M.& Taya, Sufyan A.. 2012. Sol-Gel Thin Films Immobilized with Bromocresol Purple pH-Sensitive Indicator in Presence of Surfactants. ISRN Analytical Chemistry،Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-484391
Modern Language Association (MLA)
El-Ashgar, Nizam M.…[et al.]. Sol-Gel Thin Films Immobilized with Bromocresol Purple pH-Sensitive Indicator in Presence of Surfactants. ISRN Analytical Chemistry No. 2012 (2012), pp.1-11.
https://search.emarefa.net/detail/BIM-484391
American Medical Association (AMA)
El-Ashgar, Nizam M.& El-Basioni, Ahmed I.& El-Nahhal, Issa M.& Zourob, Shehata M.& El-Agez, Taher M.& Taya, Sufyan A.. Sol-Gel Thin Films Immobilized with Bromocresol Purple pH-Sensitive Indicator in Presence of Surfactants. ISRN Analytical Chemistry. 2012. Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-484391
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-484391