One-Dimensional Zinc Oxide Decorated Cobalt Oxide Nanospheres for Enhanced Gas-Sensing Properties
One-Dimensional Zinc Oxide Decorated Cobalt Oxide Nanospheres for Enhanced Gas-Sensing Properties
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DOI：
10.3389/fchem.2018.00628
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发表时间：
2018-12
影响因子：
5.5
通讯作者：
Hang Zhou;Keng Xu;Yong Yang;Ting Yu;C. Yuan;Wenyan Wei;Yue Sun;Wenhui Lu
中科院分区：
文献类型：
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作者：
Hang Zhou;Keng Xu;Yong Yang;Ting Yu;C. Yuan;Wenyan Wei;Yue Sun;Wenhui Lu
在这项研究中，一维（1D）氧化锌负载在表面的钴氧化物微球，这是组装的单晶多孔纳米片，通过一个简单的异质外延生长过程。这种精细的结构具有优异的换能器功能，从单晶的Co 3 O 4纳米片和受体功能的氧化锌纳米棒。通过扫描电子显微镜（SEM）、X射线衍射（XRD）和透射电子显微镜（TEM）对所制备的杂化物的结构进行了确认。气敏性能测试表明，所设计的杂化材料的气敏性能得到了很大的提高。对100 ppm乙醇的响应约为161（Ra/Rg），这分别是Co_3O_4（Rg/Ra = 1.47）和ZnO（Ra/Rg = 15）的110和10倍。所设计的ZnO/Co 3 O 4杂化材料对乙醇也表现出很高的选择性。这种上级气敏性能主要归因于所设计的纳米结构具有超传感器功能和超受体功能。本工作中的气敏材料的设计策略为高性能气体传感器的探索提供了新的思路。
In this study, one-dimensional (1D) zinc oxide was loaded on the surface of cobalt oxide microspheres, which were assembled by single-crystalline porous nanosheets, via a simple heteroepitaxial growth process. This elaborate structure possessed an excellent transducer function from the single-crystalline feature of Co3O4 nanosheets and the receptor function from the zinc oxide nanorods. The structure of the as-prepared hybrid was confirmed via a Scanning Electron Microscope (SEM), X-ray diffraction (XRD), and a Transmission Electron Microscope (TEM). Gas-sensing tests showed that the gas-sensing properties of the as-designed hybrid were largely improved. The response was about 161 (Ra/Rg) to 100 ppm ethanol, which is 110 and 10 times higher than that of Co3O4 (Rg/Ra = 1.47) and ZnO (Ra/Rg = 15), respectively. And the as-designed ZnO/Co3O4 hybrid also showed a high selectivity to ethanol. The superior gas-sensing properties were mainly attributed to the as-designed nanostructures that contained a super transducer function and a super receptor function. The design strategy for gas-sensing materials in this work shed a new light on the exploration of high-performance gas sensors.