Highly Responsive Room-Temperature Hydrogen Sensing of alpha-MoO3 Nanoribbon Membranes
Highly Responsive Room-Temperature Hydrogen Sensing of alpha-MoO3 Nanoribbon Membranes
复制标题
α-MoO3 纳米带膜的高响应室温氢传感
DOI：
10.1021/acsami.5b01858
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发表时间：
2015
影响因子：
9.5
通讯作者：
Gu Haoshuang
中科院分区：
文献类型：
--
作者：
Yang Shulin;Wang Zhao;Hu Yongming;Luo Xiantao;Lei Jinmei;Zhou Di;Fei Linfeng;Wang Yu;Gu Haoshuang
[001]采用水热法在120 ~ 200℃的温度下合成了定向α- moo3纳米带，并将其组装在指间电极上形成传感器。传感器的灵敏度、响应速度和恢复速度随着水热温度的升高而提高。其中，在200℃下获得的样品对1000ppm H2的室温响应时间为14.1 s。纳米带对CO、乙醇和丙酮也有很好的选择性，对浓度低至500 ppb的h2o2也有很高的灵敏度。氢传感行为依赖于h2o2和化学吸附氧之间的氧化还原反应。水热温度越高，纳米带的比表面积越大，Mo5+含量越高，导致纳米带表面的化学吸附氧增多。
[001]-Oriented α-MoO3nanoribbons were synthesized via hydrothermal method at temperature from 120 to 200 °C and following assembled a membrane on interdigital electrodes to form sensors. The sensitivity, response speed, and recovery speed of the sensor improve with the increasing hydrothermal temperature. Among them, the sample obtained at 200 °C exhibits a room-temperature response time of 14.1 s toward 1000 ppm of H2. The nanoribbons also show good selectivity against CO, ethanol, and acetone, as well as high sensitivity to H2with a concentration as low as 500 ppb. The hydrogen sensing behavior is dependent on the redox reaction between the H2and chemisorbed oxygen species. Higher hydrothermal temperature creates larger specific surface area and higher Mo5+content, leading to increased chemisorbed oxygen species on the nanoribbon surface.