Enhanced acetone response in co-precipitated WO3 nanostructures upon indium doping
Enhanced acetone response in co-precipitated WO3 nanostructures upon indium doping
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DOI：
10.1016/j.snb.2014.11.138
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发表时间：
2015-03
影响因子：
8.4
通讯作者：
S. Upadhyay;R. Mishra;Pradosh Prakash Sahay
中科院分区：
文献类型：
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作者：
S. Upadhyay;R. Mishra;Pradosh Prakash Sahay
基于In掺杂WO_3纳米结构的丙酮传感器在不同的工作温度和测试气体浓度下进行了研究。基于1.5%In掺杂WO_3纳米结构的传感器在空气中丙酮蒸气浓度为50ppm时，在250℃的工作温度下显示出最大响应(∼93%)，并且具有快速的响应/恢复时间。X射线衍射结果证实了所制备的WO_3纳米结构为单斜晶系。透射电子显微镜图像显示，相对于未掺杂的WO_3，掺铟后样品的颗粒尺寸有所增大。扫描电子显微镜的图像显示了不同的表面形貌，而EDX光谱证实了In离子进入了WO_3晶格。拉曼光谱研究也证实了未掺杂和In掺杂的WO_3样品的单斜晶系结构。
The acetone sensors based on In-doped WO3nanostructures have been investigated for different operating temperatures and test gas concentrations. The sensor based on 1.5 at% In-doped WO3nanostructure shows maximum response (∼93%) at the operating temperature of 250 °C for 50 ppm concentration of acetone vapor in air, and also exhibits fast response/recovery time. The XRD results confirm the monoclinic phase of the as-prepared WO3nanostructures. TEM images reveal that there is an enhancement in the particle size upon indium doping, relative to the undoped WO3. The SEM images exhibit different surface morphology, whereas the EDX spectra confirm the presence of indium ions into the WO3lattice. Raman spectroscopy studies also confirm the monoclinic structure of the undoped and In-doped WO3samples.