A tunable volatile organic compound sensor by using PtOx/GQDs/TiO2 nanocomposite thin films at room temperature under visible-light activation

Shao Shaofeng; Chen Yunyun; Huang Shenbei; Jiang Fan; Wang Yunfei; Koehn Ralf

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A tunable volatile organic compound sensor by using PtOx/GQDs/TiO2 nanocomposite thin films at room temperature under visible-light activation

机译：通过在可见光激活下在室温下使用PTOX / GQDS / TiO2纳米复合薄膜通过Ptox / GQDS / TiO2纳米复合薄膜进行可调谐挥发性有机化合物传感器

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In this work, a PtOx/GQDs/TiO2 nanoporous thin film with high sensitivity and excellent selectivity at room temperature is fabricated in situ on a sensor device by using an oxygen-plasma treatment. PtOx/GQDs/TiO2 nanocomposite thin films exhibit distinctly different sensor responses toward oxygen-functionalized VOCs under visible-light activation. In particular, the PtOx/GQDs/TiO2 nanocomposite thin films depict a reversible change in their sensing behaviour from p-type to n-type for oxygen-functionalized VOCs as a function of the oxygen-plasma treatment, while these gas sensors present p-type sensing performance for aromatic VOCs throughout. Furthermore, the gas sensors in this work exhibit high sensitivity to isopropanol gas with a response value of up to 4.4 to 1 ppm and a short response time of 9 seconds at room temperature. The reported synthesis procedure to fabricate a tunable and sensitive VOC sensor may be extended to a potential real-world application in breath diagnosis.

机译：在这项工作中，通过使用氧等离子体处理在传感器装置上原位制造具有高灵敏度和在室温下优异选择性的PTOX / GQDS / TiO2纳米多孔薄膜。 PTOX / GQDS / TiO2纳米复合薄膜在可见光活化下表现出朝向氧官能化VOC的明显不同的传感器响应。特别地，PTOX / GQDS / TiO2纳米复合薄膜描绘了从P型对氧官能化VOC的对氧官能化VOCS的感测行为的可逆变化作为氧等离子体处理，而这些气体传感器存在p- 整个芳香VOC的型式感应性能。此外，该工作中的气体传感器对异丙醇气体具有高敏感性，响应值高达4.4至1ppm，室温下的短响应时间为9秒。报告的用于制造可调谐和敏感的VOC传感器的合成程序可以扩展到呼吸诊断中的潜在的真实应用。

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来源
《RSC Advances》 |2017年第63期|共10页
作者
Shao Shaofeng; Chen Yunyun; Huang Shenbei; Jiang Fan; Wang Yunfei; Koehn Ralf;
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作者单位

Nanjing Univ Informat Sci &

Technol Jiangsu Key Lab Optoelect Detect Atmosphere &

Oce Nanjing Jiangsu Peoples R China;

Nanjing Univ Informat Sci &

Technol Jiangsu Key Lab Optoelect Detect Atmosphere &

Oce Nanjing Jiangsu Peoples R China;

Nanjing Univ Informat Sci &

Technol Jiangsu Key Lab Optoelect Detect Atmosphere &

Oce Nanjing Jiangsu Peoples R China;

Nanjing Univ Informat Sci &

Technol Jiangsu Key Lab Optoelect Detect Atmosphere &

Oce Nanjing Jiangsu Peoples R China;

Nanjing Univ Informat Sci &

Technol Jiangsu Key Lab Optoelect Detect Atmosphere &

Oce Nanjing Jiangsu Peoples R China;

Ctr Free Electron Laser Sci Bldg 99 Notkestr 85 Hanburg Germany;

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正文语种 eng
中图分类化学;
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A tunable volatile organic compound sensor by using PtOx/GQDs/TiO2 nanocomposite thin films at room temperature under visible-light activation

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