Islam, Shumaila and Aziz, Muhammad Safwan and Bakhtiar, Hazri and Alshoaibi, Adil and Harun, Sulaiman Wadi and Riaz, Saira and Naseem, Shahzad (2021) Optically functionalized hierarchical hematite assembled silica-titania nanocomposites for hydrocarbon detection: Fiber optic chemical sensor. Microporous and Mesoporous Materials, 326. ISSN 1387-1811, DOI https://doi.org/10.1016/j.micromeso.2021.111398.
Full text not available from this repository.Abstract
Mesoporous hematite nanoparticles (HNPs) encapsulated SiO2 -TiO2 nanocomposites (STNC) are synthesized and heat-treated at low-temperature 50 degrees C for 1 h (STNC/1h) and 2h (STNC/2h) by sol-gel process for hydrocarbons chemical sensing. Microscopic analysis revealed the thermally stable hierarchical structure of HNPs, which changed into aggregated porous spherical morphology after encapsulation in STNC and heat treatment. The low surface area of HNPs similar to 55 m(2) /g which is increased up to 289 m(2)/g for H-STNC/2h, is advantageous to enhance sensing device activity. Magnetic properties exhibited the superparamagnetic behavior of H-STNC/2h. The H-STNC/2h coated fiber optic chemical sensor revealed a linear response towards the higher carbon chains, sensitivity is calculated as 5.3 counts per unit variations in the carbon chain at 515 nm with R-2 similar to 0.98. The proposed magnetic sensing device has good reversibility, stability, and validity without any leaching traces.
| Item Type: | Article |
|---|---|
| Funders: | Fundamental Research Grant Scheme by the Malaysia Ministry of Higher Education[FRGS/1/2019/STG02/UTM/02/7], Fundamental Research Grant Scheme by the Malaysia Ministry of Higher Education[R. J130000.7854.5F191], Government of Malaysia, Universiti Teknologi Malaysia[Q. J13000.2509.21H11] |
| Uncontrolled Keywords: | Hematite nanoparticles;Opto-chemical sensor;Sol-gel;Silica-titania nanocomposite;Hydrocarbons |
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > TP Chemical technology |
| Divisions: | Faculty of Engineering |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 19 Aug 2022 08:09 |
| Last Modified: | 19 Aug 2022 08:09 |
| URI: | http://eprints.um.edu.my/id/eprint/28784 |
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