| The deterioration of the environment and the causticity of the cultural relics material are easy to damage the cultural relics. The material of the cabinets that stockpile the cultural relics will release organic acid and aldehyde, and they will damage the cultural relics. Although the museums have air purification devices now, they can't purify air completely. It is necessary to monitor the museum environment for the protection of the cultural relics.At first, PANI and DNPH were synthesized and employed as sensing materials coated on QCM for the detection of organic vapors. Formaldehyde, acetaldehyde, formic acid, acetic acid and ethanol were selected as representatives for environmental pollutants. The sensors showed fast response, not excellent reversibility, and considerable sensitivity and selectivity towards formaldehyde and acetaldehyde. The limit of the detection is 0.1μg/L and 0.05μg/L respectively. And a good index relationship in low concentrations and a good linear relationship in high concentrations were observed. Study on the film of the sensor by SEM and FT-IR, and the adsorption mechanism of the sensor concludes physical reaction and chemical reaction.Then PANI and SSS were synthesized and employed as sensing materials coated on QCM for the detection of organic vapors. Formic acid, acetic acid, formaldehyde, acetaldehyde, water vapor were selected as representatives for environmental pollutants. The sensors showed fast response, not excellent reversibility, and considerable sensitivity and selectivity towards formic acid and acetic acid. The limit of the detection is 0.5μg/L and 0.1μg/L respectively. And a good linear relationship for formic acid, a good index relationship in low concentrations and a good linear relationship in high concentrations for acetic acid were observed. Study on the film of the sensor by SEM and FT-IR, and the adsorption mechanism of the sensor concludes physical reaction and chemical reaction. |
PDF Full Text Request