TiO_2 mesocrystals: Synthesis, formation mechanisms and applications  

作　　者：CAI JinGuang QI LiMin 

机构地区：[1]Beijing National Laboratory for Molecular Sciences,State Key Laboratory for Structural Chemistry of Unstable and Stable Species,College of Chemistry,Peking University,Beijing 100871,China

出　　处：《Science China Chemistry》2012年第11期2318-2326,共9页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (21073005, 21173010, and 51121091);National Basic Research Program of China (973 Program, 2007CB936201)

摘　　要：Mesocrystals, which are assemblies of crystallographically oriented nanocrystals, have received increasing attention due to their unique properties such as high crystallinity, high porosity, oriented subunit alignment, and similarity to highly sophisticated biominerals. However, the controlled synthesis of TiO 2 mesocrystals has not been realized until recently, probably because of the difficulty in accurately controlling the reaction processes that produce TiO 2 crystals. In this review, recent advances in the synthesis and applications of TiO 2 mesocrystals are summarized with particular attention paid to the mechanisms of their formation. Three typical pathways for the preparation of TiO 2 mesocrystals are discussed, namely topotactic transformation, direct synthesis in solution, and growth on supports. The potential applications of TiO 2 mesocrystals in lithium ion batteries, photocatalysis, enzyme immobilization, and antireflection materials are also described.Mesocrystals, which are assemblies of crystallographically oriented nanocrystals, have received increasing attention due to their unique properties such as high crystallinity, high porosity, oriented subunit alignment, and similarity to highly sophisti- cated biominerals. However, the controlled synthesis of TiO2 mesocrystals has not been realized until recently, probably be- cause of the difficulty in accurately controlling the reaction processes that produce TiO2 crystals. In this review, recent ad- vances in the synthesis and applications of TiO2 mesocrystals are summarized with particular attention paid to the mechanisms of their formation. Three typical pathways for the preparation of TiO2 mesocrystals are discussed, namely topotactic transfor- mation, direct synthesis in solution, and growth on supports. The potential applications of TiO2 mesocrystals in lithium ion batteries, photocatalysis, enzyme immobilization, and antireflection materials are also described.

关 键 词：MESOCRYSTALS TIO2 formation mechanisms topotactic transformation oriented attachment mesoscale assembly 

分 类 号：O614.411[理学—无机化学]