Room-temperature hydrogen gas sensing properties of the networked Cr2O3-functionalized Nb2O5 nanostructured sensor
Room-temperature hydrogen gas sensing properties of the networked Cr2O3-functionalized Nb2O5 nanostructured sensor
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DOI：
10.1007/s12540-016-6028-3
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发表时间：
2016-07-01
影响因子：
3.5
通讯作者：
Lee, Chongmu
中科院分区：
文献类型：
--
作者：
Park, Sunghoon;Kheel, Hyejoon;Lee, Chongmu
采用水热法合成了cr2o3功能化的Nb2O5纳米颗粒。与原始Nb2O5纳米结构相比，多网络cr2o3功能化Nb2O5纳米结构传感器具有更高的H-2气敏性能。在室温下，cr2o3功能化Nb2O5纳米结构传感器的响应为5.24 ~ 2 ppm H-2，而原始Nb2O5纳米颗粒传感器的响应为2.29。前者对H-2也表现出更快的反应。与其他基于纳米材料的肖特基二极管型传感器和基于Nb2O5的肖特基二极管型传感器相比，多网络原始传感器和cr2o3功能化的Nb2O5纳米结构传感器分别更强、更短。详细讨论了cr2o3功能化Nb2O5纳米结构传感器对H-2气体传感性能增强的潜在机制。特别强调了Cr2O3-Nb2O5 p-n结在cr2o3功能化Nb2O5纳米结构传感器中的作用。
Cr2O3-functionalized Nb2O5 nanoparticles were synthesized via a facile hydrothermal route. The multiple-networked Cr2O3-functionalized Nb2O5 nanostructured sensor showed enhanced H-2 gas sensing performance compared to its pristine Nb2O5 nanostructure counterpart. The Cr2O3-functionalized Nb2O5 nanostructure sensor showed responses of 5.24 to 2 ppm of H-2 at room temperature, whereas the pristine Nb2O5 nanoparticle sensors showed responses of 2.29. The former also exhibited a faster response to H-2. The multiple-networked pristine and Cr2O3-functionalized Nb2O5 nanostructured sensors were stronger and much shorter, respectively, than other nanomaterial-based Schottky diode-type sensors and Nb2O5-based Schottky diode-type sensors. The underlying mechanism for the enhanced sensing performance of the Cr2O3-functionalized Nb2O5 nanostructured sensor towards H-2 gas is discussed in detail. Particular emphasis is placed on the role of the Cr2O3-Nb2O5 p-n junction in the Cr2O3-functionalized Nb2O5 nanostructure sensor.