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You are here: Home / Publications / Sol–gel synthesis of Pd doped ZnO nanorods for room temperature hydrogen sensing applications

Sol–gel synthesis of Pd doped ZnO nanorods for room temperature hydrogen sensing applications

December 23, 2014 By Editor

Abstract – A sol-gel spin coating technique was described for the synthesis of Pd doped ZnO nanorods for hydrogen sensing applications. The nanorods were hexagonal in shape, 50–100 nm in diameter and uniform in distribution. They exhibited homogeneous surface morphology, c-axis orientation and excellent crystalline properties. The synthesized nanorods were used to sense and detect hydrogen in a homemade gas chamber. The fabricated sensor successfully detected as low as 40 ppm hydrogen at room temperature with a very low level of power supply (16.16 mA) under a mixed background. Dynamic and repeated responses were observed with a wide range of hydrogen concentrations (40–360 ppm) at 200 C. The developed sensor was at least 25 fold more sensitive over the literature documented Pd doped ZnO nanorods in detecting hydrogen at ambient temperature. The simplicity, low-cost, high sensitivity and high stability of the sensor materials suggested that the synthesized Pd doped ZnO nanorods could be used in hydrogen and chemical sensing devices where Pd-mediated catalysis is involved.

Keywords – Pd doped ZnO nanorods, Hydrogen sensors, Sol–gel, Spin coating

Corresponding Author: Uda Hashim
Corresponding Author’s Email: uda@unimap.edu.my

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Filed Under: Publications Tagged With: Hydrogen sensors, Pd doped ZnO nanorods, Sol–gel, Spin coating

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