Iron-Doped Titanium Dioxide Nanoparticles As Potential Scaffold for Hydrazine Chemical Sensor Applications

Abstract

Herein, we report the fabrication of a modified glassy carbon electrode (GCE) with high-performance hydrazine sensor based on Fe-doped TiO 2 nanoparticles prepared via a facile and low-cost hydrothermal method. The structural morphology, crystalline, crystallite size, vibrational and scattering properties were examined through different characterization techniques, including FESEM, XRD, FTIR, UV-Vis, Raman and photoluminescence spectroscopy. FESEM analysis revealed the high-density synthesis of Fe-doped TiO 2 nanoparticles with the average diameter of 25 ± 5 nm. The average crystallite size of the synthesized nanoparticles was found to be around 14 nm. As-fabricated hydrazine chemical sensors exhibited 1.44 µA µM −1 cm −2 and 0.236 µM sensitivity and limit of detection (LOD), respectively. Linear dynamic ranged from 0.2 to 30 µM concentrations. Furthermore, the Fe-doped TiO 2 modified GCE showed a negligible inference behavior towards ascorbic acid, uric acid, glucose, SO 4 2− , NO 3 − , Pb 2+ and Ca 2+ ions on the hydrazine sensing performance. Thus, Fe-doped TiO 2 modified GCE can be efficiently used as an economical, easy to fabricate and selective sensing of hydrazine and its derivatives.

Synthesis, Characterization and Photoelectric Properties of Fe2O3 Incorporated TiO2 Photocatalyst Nanocomposites

“…In Raman spectra, four main peaks were observed at 145 cm −1 , 396 cm −1 , 514 cm −1 , and 637 cm −1, which belong to Eg, B1g, A1g + B1g, Eg mode, respectively. The main peaks observed in Raman spectra were well correlated to earlier reports confirms the phase of the prepared samples [20,33]. The position of the main peak at 145 cm −1 is slightly shifted towards a higher wavenumber when Fe was doped in TiO 2 .…”

“…Rodriguez and co-workers [19] used the sol-gel technique for the synthesis of Fe-incorporated TiO 2 and observed a decrease in the optical bandgap from 3.3 eV to 2.9 eV with enhanced absorption in the visible region as the incorporating concentration of Fe increases. Fe-doped TiO 2 NPs prepared by the hydrothermal method were applied as an efficient electron mediator for the fabrication of hydrazine chemical sensor using glassy carbon electrode [20] which proves to be a sensitive sensor. The sol-gel routed spin coating technique was employed to synthesize Fe-doped TiO 2 NPs and observed that the optical transmittance is was decreased with increasing Fe dopant concentrations [21].…”

Structural, Optical, and Antibacterial Efficacy of Pure and Zinc-Doped Copper Oxide Against Pathogenic Bacteria

“…According to “Inorganic crystal structure database (ICSD) reference No. 01-080-1268”, the peaks found at 29.42°, 32.53°, 35.5°, 38.7°, 48.6°, 53.51°, 58.29°, 61.51°, 66.17°, and 68.07° corresponded to (210), (110), (002), (111), (−202), (020), (202), (−113), (−311), and (220) planes in the monoclinic structure of CuO [ 38 , 39 , 40 ]. The sharpness of the peaks indicated that pure CuO was highly crystalline.…”

Mesoporous Metal Oxide Films

“…The adsorption of CHCl 3 on the oxygenated ZnO reduces its bandgap, and the deposition of O on a ZnO nanocluster increases its sensitivity to CHCl 3 and may facilitate CHCl 3 removal or detection. Another facile, low-cost hydrothermal method was used by Umar et al [14] for the synthesis of Fe-doped TiO 2 nanoparticles. These nanoparticles were used to prepare modified glassy carbon electrodes (GCE) for the development of a hydrazine sensor.…”