Hybrid Co3O4/SnO2 Core–Shell Nanospheres as Real-Time Rapid-Response Sensors for Ammonia Gas
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- 作者：Lili Wang ; Zheng Lou ; Rui Zhang ; Tingting Zhou ; Jianan Deng ; Tong Zhang
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2016
- 出版时间：March 16, 2016
- 年：2016
- 卷：8
- 期：10
- 页码：6539-6545
- 全文大小：536K
- ISSN：1944-8252
文摘
Novel hybrid Co3O4/SnO2 core–shell nanospheres have been effectively realized by a one-step hydrothermal, template-free preparation method. Our strategy involves a simple fabrication scheme that entails the coating of natural cross-link agents followed by electrostatic interaction between the positive charges of Sn and Co ions and the negative charge of glutamic acid. The core–shell architecture enables novel flexibility of gas sensor surfaces compared to commonly used bulk materials. The highly efficient charge transfer and unique structure are key to ensuring the availability of high response and rapid-response speed. It demonstrates how hybrid core–shell nanospheres can be used as an advance function material to fabricate electrical sensing devices that may be useful as gas sensors.