Abstract
A concise solution approach is designed to prepare the unique exposed {100} planes of the MWCNTs-Co3O4 heterojunction structure. The MWCNTs-Co3O4 sensor displays excellent gas sensitivity, which is higher around 3.5 times than that of pristine Co3O4-based sensor exposed to 100 ppm of acetone at 180 °C. Moreover, the sensor based on MWCNTs-Co3O4 reveals high selectivity, good long-term stability and anti-humidity. The possible mechanism of the boosted gas sensing performance can be ascribed to the exposed {100} planes and promising heterojunction.
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