School of Physical Electronics, University of Electronic Science and Technology of China , Chengdu 610054, People's Republic of China.
Department of Nuclear Engineering and Radiological Sciences, University of Michigan , Ann Arbor, Michigan 48109-2104, United States.
ACS Appl Mater Interfaces. 2016 Aug 17;8(32):20962-8. doi: 10.1021/acsami.6b02893. Epub 2016 Aug 2.
Porous CuO nanosheets were prepared on alumina tubes using a facile hydrothermal method, and their morphology, microstructure, and gas-sensing properties were investigated. The monoclinic CuO nanosheets had an average thickness of 62.5 nm and were embedded with numerous holes with diameters ranging from 5 to 17 nm. The porous CuO nanosheets were used to fabricate gas sensors to detect hydrogen sulfide (H2S) operating at room temperature. The sensor showed a good response sensitivity of 1.25 with respond/recovery times of 234 and 76 s, respectively, when tested with the H2S concentrations as low as 10 ppb. It also showed a remarkably high selectivity to the H2S, but only minor responses to other gases such as SO2, NO, NO2, H2, CO, and C2H5OH. The working principle of the porous CuO nanosheet based sensor to detect the H2S was identified to be the phase transition from semiconducting CuO to a metallic conducting CuS.
多孔氧化铜纳米片通过简便的水热法在氧化铝管上制备，研究了其形态、微观结构和气体传感性能。单斜晶系的氧化铜纳米片平均厚度为 62.5nm，嵌入有许多直径在 5 到 17nm 之间的孔。多孔氧化铜纳米片被用于制造气体传感器，以在室温下检测硫化氢（H2S）。当用低至 10ppb 的 H2S 浓度进行测试时，传感器的响应灵敏度为 1.25，响应/恢复时间分别为 234 和 76s。它对 H2S 表现出极高的选择性，但对其他气体如 SO2、NO、NO2、H2、CO 和 C2H5OH 的响应则较小。基于多孔氧化铜纳米片的传感器检测 H2S 的工作原理被确定为从半导体 CuO 到金属导电 CuS 的相变。
