Islam, Shumaila and Aziz, Muhammad Safwan and Bakhtiar, Hazri and Harun, Sulaiman Wadi and Riaz, Saira and Naseem, Shahzad (2021) Thermally stable and fast responsive mesoporous cresol red functionalized silica and titania nanomatrices: Fiber optic pH sensors. Journal of Sol-Gel Science and Technology, 99 (3). pp. 497-511. ISSN 0928-0707, DOI https://doi.org/10.1007/s10971-021-05604-z.
Full text not available from this repository.Abstract
Owing to the fast responsive fiber optic pH sensing, silica nanomatrix (SNM) and titania nanomatrix (TNM) are synthesized by the sol-gel method at low temperatures. Cresol red (CR) is immobilized within SNM and TNM for sensing evaluation. Crack-free, crystallinity and porous surfaces with an average particle size of CR-SNM similar to 45 +/- 0.4 nm and CR-TNM similar to 24 +/- 0.4 nm are observed through microscopic analysis. The is observed in CR immobilized matrices. The CR-SNM shows lower roughness similar to 7 nm, a large surface area similar to 380 m(2)/g, thermal stability at <= 400 degrees C, and a refractive index 1.47. Whereas, CR-TNM revealed high roughness 48 nm, surface area 211 m(2)/g, and refractive index 1.76. The sensitivity of the CR-SNM coated fiber is estimated at around 52.8 counts/pH which is greater than CR-TNM coated fiber sensitivity 14.53 counts/pH. Moreover, CR-SNM shows response time 0.17 s at pH 12 which is faster than CR-TNM time response 0.48 s. GRAPHICS] .
| Item Type: | Article |
|---|---|
| Funders: | Fundamental Research Grant Scheme by Malaysia Ministry of Higher Education (R.J130000.7854.5F191), Fundamental Research Grant Scheme by Malaysia Ministry of Higher Education (FRGS/1/2019/STG02/UTM/02/7) |
| Uncontrolled Keywords: | Cresol-red; Silica nanomatrix; Titania nanoparticles; Sol-gel; Fiber optic pH sensing |
| Subjects: | Q Science > Q Science (General) T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Engineering > Department of Electrical Engineering |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 12 Aug 2022 07:18 |
| Last Modified: | 12 Aug 2022 07:18 |
| URI: | http://eprints.um.edu.my/id/eprint/28485 |
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