2D-TMDs/ZnO异质复合半导体材料的VOCs敏感性能及协同增敏机制研究

锌锡氧化物半导体应用于挥发性有机污染物（VOCs）敏感探测有重要意义，但工作温度高、能耗大及交叉敏感性等缺陷是其发展应用的瓶颈。本项目拟从物理学角度研究：（一）在氧化锌（ZnO）半导体中引入二维层状过渡金属硫化物（2D-TMDs），通过构筑Au/La2O3催化剂共担载的异质结型2D-TMDs/ZnO复合半导体体系，研究复合材料的结构稳定性及成型机理；（二）通过考察2D-TMDs/ZnO异质复合材料对甲醛等VOCs的敏感响应特性，研究Au/La2O3及TMDs在敏感探测中的催化效应及复合材料体系的协同增敏机制；（三）研究复合敏感材料体系中的表面特性、载流子输运等电学性质，探索敏感材料微结构调控与表面反应动力学之间的联系，揭示敏感体组分调控与共催化效应的内在关联。项目研究致力于整合TMDs与ZnO单一敏感体各有优势但均缺陷突出的问题，为复合半导体材料应用于VOCs敏感探测提供参考。

Metal Oxide semiconductors are of great significance in the sensitive detection of volatile organic pollutants (VOCs). However, the shortcomings of high operating temperature, high energy consumption and cross-sensitivity are the bottlenecks for their further development and application. The project focuses on: (1) constructing Au/La2O3 co-modified 2D-TMDs/ZnO heterojunction nanostructures by using electrospinning, template method and wet chemical synthesis process, in which 2D-TMDs represents two-dimensional layered transition metal sulfides, the fabrication process, structural stability and forming mechanism of the composite system will be investigated; (2) Do research on the sensitive response characteristics of 2D-TMDs/ZnO composite materials to VOCs, the co-catalytic effect of Au/La2O3 and TMDs, and the synergistic sensitization mechanism of heterogeneous composite systems; (3) Investigating the carrier transport characteristics, reaction kinetics, adsorption/desorption properties of 2D-TMDs/ZnO composite materials, exploring the relationship between micro-structure regulation and surface reaction kinetics of sensitive materials, revealing the relationship between the regulation of sensitive components and the catalytic effect of co-catalysts. The project research is expected to solve the problems of TMDs and ZnO single sensing materials, which two have both outstanding advantages and obvious defects. It may provide theoretical and experimental references for the application of coupled-semiconductor materials in VOCs detection.