半导体二硫化钼电致化学发光行为及其在化学传感中的应用研究

In the past few years, diverse semiconductors have been widely studied in the field of electrogenerated chemiluminescence (ECL) as the efficient ECL luminophores due to their unique ECL properties and promising application in the field of analytical chemistry. On the basis of their ECL behaviors, a great many of chemical sensors and biosensors have been developed for the determination of various analytes. Theoretically, the semiconductor molybdenum disulfide (MoS2) may be served as a potential efficient ECL luminophore; however, to the best of our knowledge, the ECL behavior of MoS2 in the solution as well as its application in the chemical sensing field has never been reported. In the present study, the ECL behavior of the semiconductor MoS2 will be investigated to demonstrate that MoS2 could be a new class of efficient and promising luminophore in the ECL field. The effects of experimental parameters on the ECL behavior of MoS2 will be studied in detail, and the possible response mechanism for the ECL behavior of MoS2 will be proposed. Furthermore, we will investigate the potential application of the ECL from the semiconductor MoS2 in the chemical sensing field, developing some ECL sensors with high sensitivity, good selectivity and low detection limit, and expanding the application of MoS2 in the field of analytical chemistry.

近年来，多种半导体材料显示出优良的电致化学发光(ECL)性能，被作为一类高效的ECL发光体广泛应用于电致化学发光领域的研究，其在分析化学领域具有巨大的应用前景，构建了以多种物质为目标检测物的化学与生物传感器。理论上，半导体材料二硫化钼可能作为一种高效的ECL发光体，但到目前为止，尚未有关于二硫化钼在溶液相中的电致化学发光行为及其在化学传感领域的应用研究报道。本课题拟对二硫化钼的电致化学发光行为展开研究，验证二硫化钼作为一种新型高效ECL发光体的可能性，考察二硫化钼电致化学发光行为的影响因素，揭示二硫化钼电致化学发光的反应机理，探索二硫化钼电致化学发光行为在化学传感领域的应用，构建灵敏度高，选择性好和检测下限低的电致化学发光传感器，拓展二硫化钼在分析化学领域的应用。

近年来，电致化学发光技术在分析化学领域显示出具有巨大的应用前景，构建了以多种物质为目标检测物的电致化学发光型化学与生物传感器。二硫化钼(MoS2)纳米片作为一种新兴的二维材料，其在传感领域的应用已有所报道，但到目前为止，MoS2纳米片及其复合物的电致化学发光行为及其在化学传感领域的应用研究报道相对较少。与此同时，在日常生活和环境中存在着各种各样的有害物质，如日用品中的致癌性物质，食品中的致癌性/致畸性物质和水体中的重金属离子等，亟需构建以上述物质为目标检测物的新型高效化学与生物传感方法。本课题中制备并表征了包括MoS2纳米片，MoS2-Ru(bpy)32+复合物，MoS2-AuNPs复合物以及其它纳米材料在内的多种微/纳米功能材料，对包括MoS2纳米片在内的多种功能材料的电致化学发光，光学，电化学性能进行了探索，并据此构建了分别以致癌性/致畸性物质(如三乙醇胺，过氧化氢，三聚氰胺)，重金属离子(如Hg2+，Cu2+)和其它分子(如葡萄糖，半胱氨酸)为目标检测物的高灵敏度和高选择性化学与生物传感器，并考察了其传感机制和在实际样品检测中的应用。本课题探索了包括MoS2纳米片在内的多种功能材料的电致化学发光行为，光学性能和电化学性能在化学与生物传感器的应用，拓展了MoS2纳米片在内的多种功能材料在分析化学领域的应用。