Abstract
Hybridization between graphene nanoplatelets oxide-cobalt oxides (GO-Co3O4) has led to the formation of porous fireworks-like nanorods structures, that might hold the key to reducing the operating temperature of pristine Co3O4. This is essential for low-concentration gas sensing purposes. This study will be comparing different ratios of GO and Co3O4 used during the synthesis of GO-Co3O4 and comparisons of each different will be further discussed based on its gas sensing performance. Here, the 0.2 GO- Co3O4 sensor has shown the best response with a value of 9.26 upon injection of 20 ppm of acetone gas at 225 °C. The response exhibited is significantly higher compared to the response exhibited by pristine Co3O4 gas sensor (0.04). With a response and recovery period of 38 s and 99 s respectively, the fabricated 0.2 GO- Co3O4 sensor has the potential for highly responsive, low-detection acetone gas sensing materials along with its unique and distinguishable nanostructure.
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