Ozone sensing based on palladium decorated carbon nanotubes.

Ozone sensing based on palladium decorated carbon nanotubes.
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DOI:
10.3390/s140406806
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发表时间:
2014-04-14
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
Febles VG
Febles VG
中科院分区:
其他
文献类型:
--
作者:
Colindres SC;Aguir K;Cervantes Sodi F;Vargas LV;Salazar JM;Febles VG

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以乙酰丙酮酸钯为原料,采用气相浸渍-分解法制备了多壁碳纳米管(MWCNTs)。该传感器装置由一层敏感材料(MWCNTs-Pd)组成,通过滴涂沉积在二氧化硅衬底上的铂交叉电极上。该传感器在不同温度下对臭氧(O3)的响应时间为60 s,具有检测浓度高达20 ppb的能力。该传感器在120°C下暴露于O3时表现出最佳响应。该装置具有高重复性、全回收率和高效响应的传感器性能。
Multiwall carbon nanotubes (MWCNTs) were easily and efficiently decorated with Pd nanoparticles through a vapor-phase impregnation-decomposition method starting from palladium acetylacetonates. The sensor device consisted on a film of sensitive material (MWCNTs-Pd) deposited by drop coating on platinum interdigitated electrodes on a SiO2 substrate. The sensor exhibited a resistance change to ozone (O3) with a response time of 60 s at different temperatures and the capability of detecting concentrations up to 20 ppb. The sensor shows the best response when exposed to O3 at 120 °C. The device shows a very reproducible sensor performance, with high repeatability, full recovery and efficient response.
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