A visible-light-assisted Pd/TiO₂gas sensor with carbon nanotubes electrodes for trace formaldehyde detection AITranslate

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Basic Information:

DOI：

Chinese Library Classification Number:X831[环境科学与工程—环境工程];TP212[自动化与计算机技术—检测技术与自动化装置];TB383.1[一般工业技术—材料科学与工程]

Citation Information:

Owing to the ppb-level detection standard toward the toxic and harmful gas,the detection of trace gases has become an important subject in the field of indoor environment management.However,the traditional resistive gas sensors hardly meet the requirement due to the weak signal generated by trace gas molecules that are difficult to capture.Herein,a visible-light-assisted Pd/TiO₂gas sensor is proposed to endow the effective detection of trace formaldehyde(HCHO)gas without heating temperature.Benefiting from the enhanced photocatalytic properties of TiO₂by Pd decoration,the visible-light-assisted Pd/TiO₂gas sensor can detect the HCHO gas as low as80×10^–9at room temperature.The successful preparation of nanoscale TiO₂sensing layer is facilitated by the ultrathin carbon nanotube interdigital electrode in the gas sensor,which avoids the discontinuity of the sensing layer caused by the excessive thickness of the traditional metal electrode.In addition,the whole preparation process of the Pd/TiO₂gas sensor with carbon nanotube electrodes is compatible with mainstream CMOS fabrication technology,which is expected to realize the batch fabrication and micro-integrated application of gas sensors.It is expected that our work can provide a new strategy for the batch preparation of high-performance trace HCHO gas sensors and their future applications in portable electronic devices such as smartphones.