Mesoporous ZnO@Co3O4 Nanosphere for Sensitive Detection of 3-Hydroxy-2-Butanone

The mixed semiconductor metal oxides as the gas sensor can enhance the sensitivity compared with the metal oxide respectively. In this study, the mesoporous ZnO@Co 3 O 4 nanosphere was prepared through the simple hydrothermal synthesis method of ZIF-L-Zn@Co, the cage construction of mesoporous ZnO@Co 3 O 4 nanosphere was remained unchanged after the calcination of the ZIF-L-Zn@Co at 600℃ for 2 h in the air. The mesoporous ZnO@Co 3 O 4 nanosphere was selected as the gas sensor for the detection of 3-Hydroxy-2-Butanone. Compared with the ZnO and Co 3 O 4 respectively, the mesoporous ZnO@Co 3 O 4 nanosphere as the gas sensor shows the high sensitivity, selectivity and stability.