Meso- and macroporous coral-like Co3O4 for VOCs gas sensor
Meso- and macroporous coral-like Co3O4 for VOCs gas sensor
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用于 VOC 气体传感器的介孔和大孔珊瑚状 Co3O4
DOI：
10.1016/j.ceramint.2015.05.045
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发表时间：
2015-11-01
影响因子：
5.2
通讯作者：
Wang, Yude
中科院分区：
文献类型：
--
作者：
Deng, Shaojuan;Chen, Nan;Wang, Yude
利用金属盐与有机物的配合物（金属-有机配合物），通过简单的自维持分解反应合成了介孔和大孔珊瑚状Co 3 O 4。采用X射线粉末衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、拉曼光谱（Raman）和X射线光电子能谱（XPS）对多孔Co 3 O 4材料的形貌和微观结构进行了表征，分析了多孔Co 3 O 4材料的形成原因。Co 3 O 4具有介孔和大孔结构，由纳米颗粒组成，具有数十微米大小的珊瑚状形状，并表现出分级多孔形态，其中大孔的壁包含较小的介孔。研究了多孔Co 3 O 4对挥发性有机物（VOCs）的气敏特性。在120摄氏度的操作温度下，对1000 ppm正丁醇的气体响应达到最大值27.7，并且Co 3 O 4颗粒约为十分之五。多孔Co 3 O 4也表现出一定的选择性和响应/恢复时间。(C)2015 Elsevier Ltd和Techna Group S.r.l. All rights reserved.
Meso- and macroporous coral-like Co3O4 was synthesized via a facile self-sustained decomposition using the complexes of metallic salts and organics (metal-organic complexes). Porous Co3O4 material was characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, and X-ray photoelectron spectrum (XPS) to examine the morphology and microstructure to find out the cause. Co3O4 with the meso- and macroporous structure consisting of nanoparticles has a coral-like shape with a size of tens of micrometers and exhibits the hierarchically porous morphology, in which the walls of the macropores contain smaller mesopores. The gas-sensing characteristics of the porous Co3O4 for volatile organic compounds (VOCs) were investigated. The gas response to 1000 ppm n-butanol reaches a maximum of 27.7 at an operating temperature of 120 degrees C, and about five tithes of the Co3O4 particles. The porous Co3O4 also exhibits certain selectivity and response/recovery time. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.