当前位置: X-MOL 学术IEEE Sens. J. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
1-D TiO2 Nanorods Array based Parallel Electrode Sensor for Selective and Stable Detection of Organic Vapors
IEEE Sensors Journal ( IF 4.3 ) Pub Date : 2020-01-15 , DOI: 10.1109/jsen.2019.2944408
Prateek Bindra , Subhashis Gangopadhyay , Arnab Hazra

A solid-state vapor sensor in parallel electrode configuration was fabricated by employing 1-D TiO2 nanorods as a sensing layer. Highly ordered and oriented TiO2 nanorods were synthesized on a Ti substrate by using hydrothermal method. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) were used to characterize the TiO2 nanorods/Ti samples. The developed Au/TiO2 nanorods/Ti type parallel electrodes sensor demonstrated the potential of integrated operations of both resistive and capacitive changes towards various concentrations (50–300 ppm) of volatile organic compounds (VOCs) like methanol, ethanol, 2-propanol, acetone and benzene at 50 °C. The resistive response magnitude of the sensor was found to be increased from 13 % to 87% while the capacitive response magnitude of the sensor was increased from 32 % to 200%, as methanol concentration was increased from 50 ppm to 300 ppm. However, the use of both modes enhances the selectivity performance of the sensor as the resistive mode exhibited better selectivity for a lower concentration of VOCs and the capacitive mode for higher concentration of VOCs. Moreover, the sensor showed a very good stability because of low operating temperature (50°C) as well as rutile (major) phase of TiO2 nanorods.

中文翻译:

基于一维 TiO2 纳米棒阵列的平行电极传感器,用于有机蒸汽的选择性和稳定检测

通过采用一维二氧化钛纳米棒作为传感层,制造了平行电极配置的固态蒸汽传感器。采用水热法在 Ti 基底上合成了高度有序和定向的 TiO2 纳米棒。X 射线衍射 (XRD)、场发射扫描电子显微镜 (FESEM) 和透射电子显微镜 (TEM) 用于表征 TiO2 纳米棒/Ti 样品。开发的 Au/TiO2 纳米棒/Ti 型平行电极传感器展示了电阻和电容变化对各种浓度(50-300 ppm)的挥发性有机化合物(VOC)如甲醇、乙醇、2-丙醇、丙酮的综合操作的潜力和苯在 50 °C。发现传感器的电阻响应幅度从 13% 增加到 87%,而传感器的电容响应幅度从 32% 增加到 200%,因为甲醇浓度从 50 ppm 增加到 300 ppm。然而,两种模式的使用都增强了传感器的选择性性能,因为电阻模式对较低浓度的 VOC 表现出更好的选择性,而电容模式则对较高浓度的 VOC 表现出更好的选择性。此外,由于 TiO2 纳米棒的低工作温度 (50°C) 以及金红石(主要)相,该传感器表现出非常好的稳定性。两种模式的使用都增强了传感器的选择性性能,因为电阻模式对较低浓度的 VOC 表现出更好的选择性,而电容模式则对较高浓度的 VOC 表现出更好的选择性。此外,由于 TiO2 纳米棒的低工作温度 (50°C) 以及金红石(主要)相,该传感器表现出非常好的稳定性。两种模式的使用都增强了传感器的选择性性能,因为电阻模式对较低浓度的 VOC 表现出更好的选择性,而电容模式则对较高浓度的 VOC 表现出更好的选择性。此外,由于 TiO2 纳米棒的低工作温度 (50°C) 以及金红石(主要)相,该传感器表现出非常好的稳定性。
更新日期:2020-01-15
down
wechat
bug