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

被引：55
作者：
Zhang, Tian [1 ,2 ]
Tang, Xing [1 ]
Zhang, Jian [1 ,3 ]
Zhou, Tingting [1 ]
Wang, Hao [1 ]
Wu, Congyi [1 ]
Xia, Xianping [1 ]
Xie, Changsheng [1 ]
Zeng, Dawen [1 ,2 ]
机构：
[1] HUST, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China
[2] Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Wuhan 430062, Hubei, Peoples R China
[3] Australian Natl Univ, Coll Engn & Comp Sci, Res Sch Engn, Canberra, ACT 2601, Australia
来源：
LANGMUIR | 2018年 / 34卷 / 48期
关键词：
GAS SENSOR; HYDROTHERMAL SYNTHESIS; SNO2; NANOTUBES; TIO2; SENSITIZATION; TEMPERATURE; CATALYSTS; HETEROJUNCTIONS; NANOCOMPOSITES; TRANSITION;
D O I：
10.1021/acs.langmuir.8b02620
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this work, we report a metal-organic framework (MOF)-assisted strategy to synthesize necklace-like TiO2/Co3O4 nanofibers with highly ordered heterostructures via a facile approach including electro-spinning and subsequent calcination. Polycrystalline TiO2 nanofibers and Co3O4 nanocages are consummately interconnected to form a highly ordered heterogeneous nanostructure, which can be of benefit for precisely accommodating the interface resistance of the p-n heterojunctions and the future realization of improved material performance. The ethanol-gas-sensing investigation showed that TiO2/Co3O4 nanofiber sensors exhibited a strong ethanol response (Rair/Rgas -1 = 16.7 @ 150 ppm) and a low operating temperature of 150 degrees C. The sensing enhancement mechanism of the TiO2/Co3O4 nanofibers is related to the formation of heterojunctions at interfaces and the high catalytic activity of MOF-derived Co3O4. Furthermore, this versatile method is a promising approach to constructing ordered heterostructures and extending the MOF-based heterogeneous materials toward wide applications.
引用
收藏
页码：14577 / 14585
页数：9
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