A high throughput platform screening of ppb-level sensitive materials for hazardous gases
A high throughput platform screening of ppb-level sensitive materials for hazardous gases
复制标题
ppb级危险气体敏感材料的高通量平台筛查
DOI：
10.1016/j.snb.2018.08.079
复制
发表时间：
2018-12-10
影响因子：
8.4
通讯作者：
Zhang, Shunping
中科院分区：
文献类型：
--
作者：
Wang, Jianchao;Gao, Shi;Zhang, Shunping
甲醛、苯、甲苯、二甲苯等有害气体对人体健康有害。利用具有非凡气敏性能的传感器来检测这些气体是空气质量监测的关键。按中国室内空气质量标准(GB/T 18883-2002年)，甲醛、苯、甲苯、二甲苯的检出限分别为0.075 ppm、0.034 ppm、0.047 ppm、0.042 ppm。而目前市售的金属氧化物(MOX)气体传感器对这四种气体的检测下限约为1ppm或更高，不符合IAQS标准。本研究设计并建立了一种用于筛选具有高气敏性能的MOX气敏材料的高通量筛选平台。采用平行沉积的方法制备了31种基于SnO2的金属离子修饰敏感膜和一种本征SnO2敏感膜。利用该平台对它们的传感性能进行了表征。筛选出具有较高传感性能的Ir修饰SnO2和Ag修饰SnO2。程序升温降温法对这四种气体的检出限为20 ppb。该平台和研究有助于提高物料筛选效率，实现对低浓度有害气体的检测。
Hazardous gases such as formaldehyde, benzene, toluene and xylene are harmful to human health. Utilizing sensors with extraordinary gas sensing performances to detect these gases is essential to air quality monitoring. According to indoor air quality standard of China (IAQS, GB/T 18883-2002), the detection limits for formaldehyde, benzene, toluene and xylene are 0.075 ppm, 0.034 ppm, 0.047 ppm, 0.042 ppm respectively. While the detection limits of current commercial metal oxide (MOX) gas sensors to these four gases are approximately 1 ppm or more, which does not meet the IAQS. In this research, a high-throughput screening platform for screening MOX gas sensing materials with high gas sensing performances was designed and established. Thirty-one metal ions modified sensing films based on SnO2 and an intrinsic SnO2 sensing film were parallel deposited. Their sensing performances were characterized with this platform. Ir-modified SnO2 and Ag-modified SnO2 with high sensing performances were selected out. The detection limits of these four gases were 20 ppb by temperature programmed cooling method. This platform and study contribute to improve the efficiency of material screening and realize the detection of low concentration hazardous gases.