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Gas sensors based on pure ZnO hollow spheres (ZHSs) and MWCNTs/ZHSs hybrid materials were fabricated. Prepared sensors were examined to detect 320 ppm of target volatile organic compounds including ethanol, methanol, acetone and ether at temperatures ranging from 120 to 380 °C, using direct injection in a closed chamber. Results showed that the addition of CNTs to the ZHSs matrix increased significantly...
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