Professor Mi Qixi’s group, in collaboration with researchers from Shanghai JiaoTong University and Jilin University, recently published an article titled “Accelerated room-temperature crystallization of ultrahigh-surface-area porous anatase titania by storing photogenerated electrons” in Chemical Communications. A technology for storing photogenerated electrons is applied for acceleratingroom-temperature crystallization of titania, and the resulting porous anatase titania exhibits ultrahigh surface areas up to 736 m2g-1. Among those responsible for this work, Research Assistant Professor Su Juan is the first author, Assistant Professor Mi Qixi and SJTU Professor Chen Jie-Sheng are both corresponding authors, and ShanghaiTech is the first affiliated institution.
Porous titania is one of the most important synthetic functional materials because of its excellent physical and chemical properties, and large surface area. However, conventional methods for preparing porous titania usually involve heat-promoted crystallization, which brings about such side effects as lowered surface area and decreased porosity, thus reducing the material’s performance. Milder synthesis routes are needed to maintain the composition, morphology, and structure of the material, and are thus beneficial for producing materials with special properties and functions.
Thanks to their new method for storing photogenerated electrons, the duration of such a mild room-temperature crystallization process is drastically reduced from 80 to 2 days (see Figure). The as-prepared porous anatase titania materials possess ultrahigh surface areas and high photocatalytic activity. This facile process permits easy scale-up and is promising for wide applications in both fundamental research and industrial productions.
This research project is financially sponsored by the National Science Foundation of China and by start-up funding from ShanghaiTech.
Link to the article:http://pubs.rsc.org/en/content/articlelanding/2014/CC/C6CC08892A
Figure. (a) Process for storingphotogenerated electrons in titania; (b)Schematic representation of the accelerated room-temperature crystallization of titania by storingphotogenerated electrons.