CdO-Ag-ZnO nanocomposites with hierarchically porous structure for effective VOCs gas-sensing properties
CdO-Ag-ZnO nanocomposites with hierarchically porous structure for effective VOCs gas-sensing properties
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具有分级多孔结构的 CdO-Ag-ZnO 纳米复合材料可实现有效的 VOC 气敏性能
DOI：
10.1016/j.ceramint.2018.11.107
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发表时间：
2019-03
影响因子：
5.2
通讯作者：
王毓德
中科院分区：
文献类型：
--
作者：
邢欣欣;杨悦;闫志勇;胡颖;邹桐;王紫东;王毓德
本文采用溶液燃烧合成法制备了具有多级孔结构和大比表面积的CdO-Ag-ZnO纳米复合材料。采用XRD、SEM、TEM、XPS和BET等技术对催化剂的晶体结构、形貌、表面化学状态和比表面积进行了表征。采用间接加热法制备了CdO-Ag-ZnO纳米复合材料传感器，对不同浓度的挥发性有机物（VOCs）进行了检测，显示出良好的上级传感性能。与单一ZnO相比，CdO和Ag的加入有效地降低了最佳工作温度，提高了气敏响应值，缩短了响应和恢复时间。此外，本研究还探讨了其气敏特性，包括重复性、灵敏度和长期稳定性。其中，基于10 mol% CdO-Ag-ZnO的气敏元件在200 °C的工作温度下对VOCs表现出较好的气敏性能，对100 ppm甲醛、乙醇、丙酮、甲醇和异丙醇的响应值分别为198.63、156.07、53.04、64.23、183.65，是一种很有前景的VOCs检测材料。其上级传感性能主要归因于大的比表面积、特殊的多孔表面形貌、独特的纳米复合材料组合以及金属银良好的催化能力。
In this work, CdO-Ag-ZnO nanocomposites with hierarchically porous structure and large surface area were successfully fabricated by solution combustion synthesis (SCS) method. Crystalline structure, morphology, surface chemical states and specific surface area were investigated by XRD, SEM, TEM, XPS and BET techniques, respectively. Sensors fabricated from CdO-Ag-ZnO nanocomposites were made based on indirect heating method, which showed superior sensing properties in detecting different concentration of volatile organic compounds (VOCs). In contrast with singular ZnO, gas-sensing experiment results reveal that the addition of CdO and Ag effectively decreases optimum working temperature, increases gas response value and shortens response and recovery time. What’s more, other gas-sensing properties including repeatability, sensitivity and long-term stability are also discussed in this research. Particularly, gas sensor based on 10 mol% CdO-Ag-ZnO shows modest gas-sensing performance to VOCs at the operating temperature of 200 °C, and its gas response values are 198.63, 156.07, 53.04, 64.23, 183.65 towards 100 ppm formaldehyde, ethanol, acetone, methanol and isopropanol, respectively, indicating it a promising candidate in detecting VOCs. Superior sensing property is mainly ascribed to large specific surface area, special porous surface morphology, unique combination of nanocomposites and good catalytic ability of metallic Ag.
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影响因子：
3
作者：
R. Deng;Y. Zou;Zhengwang Chen;G. Jiang;Honggao Tang
通讯作者：
R. Deng;Y. Zou;Zhengwang Chen;G. Jiang;Honggao Tang
用于 VOC 气体传感器的介孔和大孔珊瑚状 Co3O4
影响因子：
5.2
作者：
Deng, Shaojuan;Chen, Nan;Wang, Yude
通讯作者：
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DOI：
10.1016/j.snb.2013.09.079
发表时间：
2014-02
期刊：
Sensors and Actuators B: Chemical
影响因子：
--
作者：
Jiang, Yadong;Xie, Guangzhong;Du, Xiaosong;Tai, Huiling
通讯作者：
Tai, Huiling
影响因子：
6.1
作者：
P. Veselý;Lance T. Lusk;G. Basařová;J. Seabrooks;D. Ryder
通讯作者：
P. Veselý;Lance T. Lusk;G. Basařová;J. Seabrooks;D. Ryder
影响因子：
6.4
作者：
Lin Xu;Ruiqing Xing;Jian Song;Wen Xu;Hongwei Song
通讯作者：
Lin Xu;Ruiqing Xing;Jian Song;Wen Xu;Hongwei Song