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Container Effect in Nanocasting Synthesis of Mesoporous Metal Oxides

2011; American Chemical Society; Volume: 133; Issue: 37 Linguagem: Inglês

10.1021/ja2060512

1943-2984

Xiaohong Sun, Yifeng Shi, Peng Zhang, Chunming Zheng, Xinyue Zheng, Fan Zhang, Yichi Zhang, Naijia Guan, Dongyuan Zhao, Galen D. Stucky,

Electrocatalysts for Energy Conversion

We report a general reaction container effect in the nanocasting synthesis of mesoporous metal oxides. The size and shape of the container body in conjunction with simply modifying the container opening accessibility can be used to control the escape rate of water and other gas-phase byproducts in the calcination process, and subsequently affect the nanocrystal growth of the materials inside the mesopore space of the template. In this way, the particle size, mesostructure ordering, and crystallinity of the final product can be systemically controlled. The container effect also explain some of the problems with reproducibility in previously reported results.