Acetone Sensing Properties and Mechanism of Rh-Loaded WO(3) Nanosheets.
Acetone Sensing Properties and Mechanism of Rh-Loaded WO(3) Nanosheets.
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Rh负载WO3纳米片丙酮传感性能及机理
DOI：
10.3389/fchem.2018.00385
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发表时间：
2018
影响因子：
5.5
通讯作者：
Li E
中科院分区：
文献类型：
--
作者：
Qiu Z;Hua Z;Li Y;Wang M;Huang D;Tian C;Zhang C;Tian X;Li E
采用酸化法制备了WO3纳米片，并采用湿法浸渍法将Rh催化剂分散在纳米片表面。研究了原始WO3和Rh修饰的WO3纳米片的形貌及其对丙酮气体的响应。根据氧吸附结合TPR结果，探讨了丙酮的传感增敏机理。结果表明，加入Rh后，WO3纳米片的纳米结构和形貌没有明显变化，但传感器的电阻和响应都有很大提高。其基本增感机理可能是氧化态Rh与WO_3表面之间的电子相互作用。
WO3 nanosheets was prepared by an acidification method and the Rh catalyst was dispersed on the surface of the nanosheets with a wet impregnation method. The morphology of pristine WO3 and Rh modified WO3 nanosheets and their responses to acetone gas were studied. According to oxygen adsorption combined with TPR results, the sensing and sensitization mechanism of acetone were discussed. It was found that no visible changes in nanostructures or morphologies were observed in WO3 nanosheets with Rh, however, the sensor resistance and sensor response were greatly promoted. The basic sensitization mechanism could be caused by the electronic interaction between oxidized Rh and WO3 surface.
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