A sensor device with specific recognition sites for formaldehyde based on molecular imprinting technique

2015 Global Conference on Polymer and Composite Materials

材料科学;化学

Zhang, Yumin^1,2 ; Zhang, Jin^1,2 ; Zhu, Zhongqi^1,2 ; Liu, Qingju^2

School of Physical Science and Technology, Yunnan University, Kunming

650091, China^1

Yunnan Key Laboratory for Micro/Nano Materials and Technology, Yunnan University, Kunming

650091, China^2

关键词: Alumina tube;    High surface-to-volume ratio;    Molecular imprinting;    Molecular imprinting techniques;    Recovery time;    Sensor device;    Specific recognition;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/87/1/012116/pdf
DOI  :  10.1088/1757-899X/87/1/012116

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A novel gas sensor for the detection of formaldehyde was developed based on molecular imprinting technique (MIT) with formaldehyde as template. The structure of the molecular imprinting nanoparticles (MINs) is of orthogonal perovskite. The MINs with a good dispersion possess high surface-to-volume ratio. The particles are spherical and uniform, and then the MINs are printed onto an alumina tube to form a sensor device. At 92°C, the response to 1 ppm formaldehyde based on the sensor is 8, while the response to the other test gases is less than 3. The response time and recovery time are 40 s and 90 s, respectively.