Metal–Organic Framework-Assisted Construction of TiO2/Co3O4 Highly Ordered Necklace-like Heterostructures for Enhanced Ethanol Vapor Sensing Performance

• DOI: 10.1021/acs.langmuir.8b02620
• Publication Date: 2018-11-13T23:24:30Z
• Authors: Tian Zhang; Xing Tang; Jian Zhang; Tingting Zhou; Hao Wang; Congyi Wu; Xianping Xia; Changsheng Xie; Dawen Zeng
• Keywords: Necklace

In this work, we report a metal–organic framework (MOF)-assisted strategy to synthesize necklace-like TiO2/Co3O4 nanofibers with highly ordered heterostructures via facile approach including electrospinning and subsequent calcination. Polycrystalline TiO2 Co3O4 nanocages are consummately interconnected form heterogeneous nanostructure, which can be of benefit for precisely accommodating the interface resistance p–n heterojunctions future realization improved material performance. The ethanol-gas-sensing investigation showed that nanofiber sensors exhibited strong ethanol response (Rair/Rgas −1 = 16.7 @ 150 ppm) low operating temperature °C. sensing enhancement mechanism is related formation at interfaces high catalytic activity MOF-derived Co3O4. Furthermore, versatile method promising constructing extending MOF-based materials toward wide applications.