金属有机骨架(MOFs)/纤维材料用于电阻式气体传感器的研究进展  

Research progress on MOFs/fiber materials for resistive gas sensors

作　　者：翟振宇 张秀玲 李从举[1,2] ZHAI Zhen-yu;ZHANG Xiu-ling;LI Cong-ju(School of Energy and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China;Beijing Key Laboratory of Resource-oriented Treatment of Industrial pollutants,Beijing 100083,China)

机构地区：[1]北京科技大学能源与环境工程学院,北京100083 [2]北京科技大学北京市工业典型污染物资源化处理重点实验室,北京100083

出　　处：《工程科学学报》2020年第9期1096-1105,共10页Chinese Journal of Engineering

基　　金：国家自然科学基金资助项目(51973015,21274006,51073005);中央高校基本科研业务费专项资金资助项目(06500100);国民核生化灾害防护国家重点实验室基金资助项目(SKLNBC2018-15)。

摘　　要：总结了将MOFs材料与金属氧化物、纺织品以及碳基导电纤维材料相结合,并在电阻式气体传感器领域的研究与应用.其中金属氧化物结合MOFs过程中,MOFs主要有两个作用:一是作为分散剂提高金属氧化物的分散性;二是利用MOFs本身具有较大的比表面积和大量的活性位点,来提高材料对于气体分子的吸附量和选择性.当纺织品与MOFs结合的过程中,由于纺织品的导电性相对较差,所以需要结合一些导电性及气体选择性较好的MOFs来作为传感器.碳基导电纤维一般具有较好的机械性能和导电性能,因此将其与MOFs材料复合后用于柔性电阻气体传感器具有一定的优势.Metal-organic frameworks(MOFs) are a new class of organic–inorganic hybrid materials that show great potential for gas adsorption and storage. However, the powder form of these materials limits the range of their applications. Integration of MOFs on polymer fiber scaffolds to increase the contact area between these frameworks and target molecules and improve the performance of the resulting material is expected to provide new application prospects in gas adsorption, membrane separation, catalysis, and toxic gas sensing. Electrochemical sensors with good flexibility and high sensitivity and selectivity are needed in environmental detection, disease diagnosis, food safety, and other fields. Flexible resistance sensors are sensitive, low cost, and can be produced on a large scale;thus,these sensors have received extensive attention from researchers. Preparing flexible resistance sensors with high sensitivity, high stability, and good wearing comfort is a current and popular area of research. In this paper, we summarized the research and application of MOFs materials combined with metal oxides, textiles and carbon-based conductive fiber materials in the field of resistance gas sensors. Metal oxides act as a conductive material in resistance sensors bearing a metal oxide-and-MOF design. In this design, MOFs play two roles. First, MOFs can wrap precious metals and form nanoparticles encasing these precious metals when calcined. Here, the precious metal functions as a catalyst while the MOF is used as a dispersant to distribute the metal evenly on the surface of the sensing material. Second, the MOFs are combined with the metal oxide by in situ growth or doping on the metal oxide surface. The MOF surface has a large specific surface area and numerous active sites that can bind with the target gas. Resistance sensing is achieved by changing the electronic distribution within the sensing material. When textiles and MOFs are combined, the resulting resistive sensing materials must have a certain electrical conductivity.

关 键 词：金属有机骨架 纤维 柔性 气体传感器 电阻 

分 类 号：X511[环境科学与工程—环境工程]