介晶的制备、性能与应用研究

Synthesis,Properties and Applications of Mesocrystals

介晶(mesocrystal)是一类由纳米晶以结晶学有序的方式自组装而成的纳米粒子超结构,通常可以显示类单晶的电子衍射行为。介晶形成过程对经典结晶的挑战及其颗粒聚集体的独特结构特色具有的潜在应用促使人们对其广泛的研究。本文主要综述了介晶的制备方法、性能和应用研究的最新进展,其中合成方法主要包括共沉淀法、水热法、溶剂热法、拓扑转变法、电化学法和溶解再结晶方法,性能和应用方面主要介绍了介晶的催化性能、电化学性能、光电性能和生物医学应用。本文着重讨论了介晶的形成过程和介晶的结构-性能关系,指出了目前介晶的制备、性能和应用研究中存在的科学问题,并展望了其发展方向。

Mesocrystals are one kind of self-assembled superstructures from nanocrystals in crystallographic ordered w ay, often show ing single-crystal-like electron diffraction behaviors. The formation process of mesocrystals imposes a great challenge to classic crystallization theory and their unique structural features of nanocrystals aggregations may create enhanced and new properties,w hich drive researchers to make extensive studies. This paper review s the latest progress in the preparation methods,properties and applications of mesocrystals. The synthesis methods of mesocrystals mainly include coprecipitation, hydrothermal, solvothermal,topological conversion,electrochemical,dissolution and recrystallization methods. And catalytic, electrochemical,optical and electrical properties as w ell as biomedical applications of mesocrystals are exhibited. The formation process and structure-property relationships of mesocrystals are emphasized. Besides,some scientific issues about the preparations,properties and applications of mesocrystals are pointed out,and the outlook of further development in the field of mesocrystals is also given.