CAJ | 학술논문

通过化学氧化聚合法和胶溶法分别制备了聚噻吩(PTP)和纳米WO3,通过简单机械共混和PTP和WO3制备不同PTP质量分数的有机-无机PTP/WO3复合物.所制备的PTP/WO3复合物比纯的PTP具有更高的热稳定性.气敏测试结果表明,在低温检测NO2时,PTP/WO3复合物具有比纯的PTP和WO3更高的响应,这可能与PTP/WO3复合物中p-n异质节的存在有关系.PTP/WO3复合物的响应受PTP质量分数的影响显著,20％ PTP/WO3复合物在低温(＜90℃)时对NO2显示出高的响应和好的选择性.因此,PTP/WO3传感器有望被用于低温检测NO2
통과화학양화취합법화효용법분별제비료취새분(PTP)화납미WO3,통과간단궤계공혼화PTP화WO3제비불동PTP질량분수적유궤-무궤PTP/WO3복합물.소제비적PTP/WO3복합물비순적PTP구유경고적열은정성.기민측시결과표명,재저온검측NO2시,PTP/WO3복합물구유비순적PTP화WO3경고적향응,저가능여PTP/WO3복합물중p-n이질절적존재유관계.PTP/WO3복합물적향응수PTP질량분수적영향현저,20％ PTP/WO3복합물재저온(＜90℃)시대NO2현시출고적향응화호적선택성.인차,PTP/WO3전감기유망피용우저온검측NO2
Polythiophene (PTP) was prepared by a chemical oxidative polymerization and nanosized WO3 was prepared by a colloidal chemical method.The organic-inorganic PTP/WO3 hybrids with different mass fractions of PTP were obtained by a simple mechanically mixing the prepared PTP and WO3.The as-prepared PTP/WO3 hybrids have a higher thermal stability than the pure PTP.The gas sensing measurements demonstrate that the PTP/WO3 hybrid sensors exhibit higher response for detecting NO2 at low temperature than the pure PTP and WO3 sensor.The sensing mechanism is suggested to be related to the existence of p-n heterojunctions in the PTP/WO3 hybrids.The response of the PTP/WO3 hybrids is markedly influenced by the PTP mass fraction.The 20％ PTP/WO3 hybrid shows high response and good selectivity to NO2 at low temperature (＜90 ℃).Therefore,the PTP/WO3 hybrids can be expected to be potentially used as gas sensor material for detecting NO2 at low temperature.