Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7144502 | Sensors and Actuators B: Chemical | 2016 | 37 Pages |
Abstract
This work presents highly sensitive TiO2 nanorods modified with palladium to investigate the sensing properties of H2 and volatile organic compound (VOC) gases. TiO2 nanorods were synthesized in a mixed solution containing 1 ml of titanium n-butoxide (TnBT) by the hydrothermal method. Pd on the surface of the TiO2 nanorods was decorated by heat treatment. The samples were characterized by the X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) techniques. The electrical properties of the TiO2 and Pd loaded TiO2 nanorods were investigated under a dry air flow at a temperature range from 30 °C to 200 °C. The H2 sensing properties of the TiO2 nanorods decorated with Pd were investigated in the concentration range of 500-2000 ppm at 200 °C. Moreover, the effect of Pd on the VOC gas sensing properties of the TiO2 nanorods was examined at 200 °C. The results revealed that the nanorods modified with palladium exhibited excellent sensing performance to H2 at 30 °C, and also had the appropriate sensor behavior at 200 °C with clear response-recovery, good stability, and reproducibility. The maximum VOC response was obtained for ethanol.
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Authors
Erdem Åennik, Onur Alev, Zafer Ziya Ãztürk,