在这项研究中,纯锡酸锌(ZnSnO3)和铋(Bi)掺杂的ZnSnO3复合材料(Bi-ZnSnO3)通过原位沉淀法合成,和它们的微观结构,形态学,化学成分,尺寸,并对比表面积进行了表征,然后测试它们的气体传感特性。结果表明,Bi-ZnSnO3表现出优于正丁醇气体的气敏性能,最佳工作温度为300°C,比纯ZnSnO3低50°C。在这个温度下,此外,Bi-ZnSnO3在100ppm浓度下对正丁醇气体的灵敏度高达1450.65,是氨气(41.01)的35.57倍,2.93倍(495.09)的丙酮气体,甲醇气体的6.02倍(241.05),甲醛气体的2.54倍(571.48),乙醇气体的2.98倍(486.58)。Bi-ZnSnO3具有高度可重复的性能。Bi-ZnSnO3(4wt%)中氧空位和化学吸附氧的总比例比纯ZnSnO3高27.72%至32.68%。因此,Bi-ZnSnO3凭借其优异的气敏性能,在正丁醇气体检测中具有相当大的潜力。
In this study, pure zinc stannate (
ZnSnO3) and bismuth (Bi)-doped
ZnSnO3 composites (Bi-
ZnSnO3) were synthesized via the in situ precipitation method, and their microstructures, morphologies, chemical components, sizes, and specific surface areas were characterized, followed by testing their gas sensing properties. The results revealed that Bi-
ZnSnO3 showed superior gas sensing properties to n-butanol gas, with an optimal operating temperature of 300 °C, which was 50 °C lower than that of pure
ZnSnO3. At this temperature, moreover, the sensitivity of Bi-ZnSnO3 to n-butanol gas at the concentration of 100 ppm reached as high as 1450.65, which was 35.57 times that (41.01) of ammonia gas, 2.93 times that (495.09) of acetone gas, 6.02 times that (241.05) of methanol gas, 2.54 times that (571.48) of formaldehyde gas, and 2.98 times that (486.58) of ethanol gas. Bi-
ZnSnO3 had a highly repeatable performance. The total proportion of oxygen vacancies and chemi-adsorbed oxygen in Bi-ZnSnO3 (4 wt%) was 27.72% to 32.68% higher than that of pure
ZnSnO3. Therefore, Bi-ZnSnO3 has considerable potential in detecting n-butanol gas by virtue of its excellent gas-sensing properties.