摘要
Pt纳米粒子作为典型的贵金属催化剂,具有高效的催化性和选择性。但一般Pt纳米粒子容易产生聚集沉淀,从而限制了其进一步的应用。本文通过制备嵌段共聚物聚乙二醇-b-聚-4-乙烯基吡啶(PEG-b-P4VP)胶束为模板,通过氯铂酸与吡啶基团的络合作用,氯铂酸将负载到胶束的核上,然后利用硼氢化钠(Na BH4)还原得到胶束负载的Pt纳米粒子。通过动态光散射(DLS)、透射电子显微镜(TEM)、X-射线能谱仪(EDS)等对胶束进行了表征。结果表明,Pt纳米粒子成功负载到胶束上。在此基础之上,加入5,10,15,20-四-(4-对磺酸基苯基)-锌卟啉(Zn TPPS),制备出同时负载Pt纳米粒子和Zn TPPS的PEG-b-P4VP/Pt/Zn TPPS复合胶束,对其进行了光谱表征和光学稳定性的测试。该复合胶束在光照产氢等领域有着重要的应用。
Pt nanoparticles （NPs） have been emerging as a new type of important functional materials due to their unique optical, electronic, magnetic and catalytic properties. However, Pt NPs are easily aggregated due to their high specific surface energy, resulting in limited applications in catalysis. In this paper, block copolymer micelle of poly（ ethylene glycol） - block - poly （4 - vinylpyridine） （ PEG - b - P4VP） was used to load platinum. The structure property of the PEG - b - P4VP/Pt micelle were characterized by dynamic light scat- tering （DIS）, transmission electron microscopy （TEM）, Energy Dispersive X- ray spectroscopy （EDS）. The results showed that the Pt NPs had been loaded successfully into PEG - b - P4VP micelle. In addition, zinc tetrakis（4 -sulfonatophenyl） porphyrin （ZnTPPS） was added to the PEG- b -P4VP/Pt micelle solution and PEG- b -P4VP/Pt/ZnTPPS complex micelle was obtained. The complex micelles were characterized by UV -visible spectroscopy and fluorescence spectroscopy and their photostability was investigated. This kind of Pt/ZnTPPS - loaded complex micelles may open up new opportunities for the development of advanced materi- al with enhanced photocatalytic performance.
出处
《华北科技学院学报》
2016年第6期63-67,90,共6页
Journal of North China Institute of Science and Technology
基金
中央高校基本科研业务费资助项目(3142015008)
国家自然科学基金项目(51503064)
