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- Title
Enhanced room temperature gas sensing performance of iron-doped titanium dioxide nanocomposite.
- Authors
Jayasaranya, N.; Pavai, R. Ezhil; Sagadevan, Suresh; Balu, L.; Manoharan, C.
- Abstract
In this study, TiO2 nanoparticles and iron-doped (1%, 3%, and 5%) TiO2 nanocomposites were synthesized using the hydrothermal technique. XRD pattern confirmed that the pure TiO2 has an anatase phase with a tetragonal structure. The average crystallite sizes of the Fe-doped (1%, 3%, and 5%) TiO2 nanocomposites (FT1, FT3, and FT5) were calculated from 9 nm to 13 nm. The metal oxides corresponding to TiO2 were identified using Fourier-transform infrared spectroscopy. The emission peak observed at 647 nm (red emission) in the photoluminescence spectrum was due to oxygen vacancies. The band gap value of pure and iron-doped (optimized) TiO2 was found to be 3.46 and 3.57 eV using the Kubelka Munk method. FE-SEM and HRTEM images revealed agglomerated particles with cubic shapes. The magnetic properties of the samples were soft and ferromagnetic. The N2 adsorption-desorption isotherms revealed that a remarkably high specific surface area of the FT3 sample was 550.56 m2 g− 1 with a pore size of 3 nm. Fe-doped TiO2 nanocomposites possess high gas-sensing activity towards acetone with low response and recovery times, and good sensitivity.
- Subjects
GAS detectors; BAND gaps; DOPING agents (Chemistry); METALLIC oxides; INFRARED spectroscopy
- Publication
Applied Physics A: Materials Science & Processing, 2024, Vol 130, Issue 8, p1
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-024-07688-0