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近年来,自组装纳米结构因为其容易制备、稳定、环保以及与各种功能基团、粒子等的多样结合能力吸引了科学家们的目光,成为人们研究的热点课题,在光电池、光催化、水凝胶、药物缓释等方面的实验科学领域得到了广泛的应用.尤其是光催化方面,自组装结构的重复性为激子的传递创造了比较良好的条件,成为众多激子传递平台中的佼佼者.本文报道了一种以苯丙氨酸二肽纳米管和羧基石墨烯为基础的自组装光吸收催化平台,对其结构进行研究,并使用该体系进行了烟酰胺腺嘌呤二核苷酸到它的还原态的催化实验.该体系的微观结构由纳米管和石墨烯膜复合而成,羧基石墨烯的存在能够降低纳米管直径,实现纳米管的形态操控,石墨烯与多肽纳米管复合纳米结构的存在实现了多通道协同激子传递,降低了激子传递的距离,极大增强了催化中心对于激子的接受和使用效率.在复合了光敏剂和催化中心之后,该体系具有较高的稳定性,均一的分散性,很强的光能吸收和转化能力等性质.对于从NADP+往NADPH转变的催化实验表明,该体系有较高的反应速率和催化效率,并且比两种单一结构催化平台效果之和更好,实现了一加一大于二的效应,展现了复合纳米结构光吸收催化平台的巨大潜力和广阔应用前景.
In recent years, self-assembled nanostructures have attracted the attention of scientists because of their ease of preparation, stability, environmental protection, and diverse binding capabilities with various functional groups and particles, and have become the hot topics of research in photovoltaic cells, photocatalysis, water Gel, drug release and other aspects of experimental science has been widely used.Especially in photocatalysis, self-assembly repeatability of the structure for the exciton transmission to create a relatively good condition, a large number of excitons transfer platform Leader.This paper reports a phenylalanine dipeptide nanotube and carboxyl graphene based self-assembled light absorption catalytic platform, the structure of the study and the use of the system nicotinamide adenine dinucleotide Acid to the reduction of its catalytic state experiments.The microstructure of the system by the composite of nanotubes and graphene film, the presence of carboxyl graphene nanotubes can reduce the diameter, to achieve the shape of nanotubes control, graphene and peptide nanotubes The existence of the composite nanostructures achieves multichannel synergistic exciton transfer, reduces the exciton transfer distance and greatly enhances the acceptance of the exciton by the catalytic center Efficiency.Compared with the photosensitizer and the catalytic center, the system has the characteristics of high stability, uniform dispersion, strong light energy absorption and conversion ability, etc. The catalytic experiment for the transition from NADP + to NADPH shows that the The system has higher reaction rate and catalytic efficiency, and better than the two single-structure catalytic platform effect and achieve one plus one greater than two effects, showing the huge potential and broad application of composite nanostructured light-absorbing catalytic platform prospect.