【摘要】 为了提高纯Bi₂WO₆对乙醇的气敏性能,通过光沉积的方法在纯Bi₂WO₆表面修饰了贵金属Pd。并探究了其对乙醇的气敏性能。实验结果表明,在300℃时,Pd修饰的Bi₂WO₆微米花传感器对200 ppm(1 ppm=10^-6)乙醇的灵敏度均高于纯Bi₂WO₆。当Pd的修饰量质量分数为0.05%时,灵敏度最大,达到了72,是纯Bi₂WO₆的6.5倍左右。该传感器响应恢复时间分别为7 s和3 s,且表现出良好的选择性。更多还原

【Abstract】 In order to improve the gas sensitivity of pure Bi₂WO₆ to ethanol,the noble metal Pd was modified on the surface of pure Bi₂WO₆ via photodeposition.Then the gas sensing performance towards ethanol was explored.The experimental results show that the sensitivity of Pd-modified Bi₂WO₆ micro-flowers sensor to 200 ppm(1 ppm=10^-6)ethanol is higher than that of pure Bi₂WO₆ at 300 °C.When the amount of Pd modified is 0.05 wt%,the sensitivity is the highest,reaching 72,which is about 6.5 times that of the pure Bi₂WO₆ micro-flowers.The sensor response recovery time is 7 s and 3 s,respectively,and shows good selectivity.更多还原