科研之友
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摘要
A novel formaldehyde gas sensor has been developed for the first time using a molecular imprinting technique (MIT) in semiconductor oxides to recognize small organic molecules. For specific recognition, the as-prepared molecularly imprinted nanoparticles exhibit good selectivity for formaldehyde. The molecularly imprinted nanoparticles were mixed with Ag-LaFeO3 to form a compound. The compound with small dimensions and good dispersity possesses an extremely high surface-to-volume ratio. Therefore the compound exhibits even better formaldehyde-sensing properties. At 40 degrees C, the response to 0.5 ppm formaldehyde based on the compound is 24.5, and is lower than 3.0 to the other test gases. The response time and recovery time are 67 s and 104 s, respectively.
- 出版日期2014
- 单位云南大学
