Abstract
Nickel-vanadium oxide nanocomposite was prepared using the hydrothermal method under different pH values (2, 4, and 6), and its gas sensing response and photocatalytic performance were evaluated. The prepared nanocomposite exhibits an anorthic crystalline structure of NiV2O6. Morphology, size, and optical properties depend on the pH value maintained during the synthesis. The NiV2O6 nanocomposite synthesized under a pH value of 2 has a nanorod structure. The gas sensing response of the NiV2O6 nanocomposite was investigated by measuring the resistance change of the samples in the presence of ammonia and ethanol gases, each with different ppm levels. Photocatalytic degradation efficiency was examined by degrading methylene blue dye under the illumination of halogen light. Scavenger studies were also carried out to identify the radical that plays an important role in the dye degradation process. A maximum degradation of 90 % was found for NiV2O6 nanorods prepared under a pH value of 2.
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