Construction of highly pure nanocrystalline heteropoly acid inside the channels of mesoporous material with the imprisoned hydrolyzation reaction of heteropoly acid etherate.
A novel technique was developed to prepare highly pure heteropoly acid (HPA) nanocrystals inside mesoporous SBA-15 by the imprisoned reaction of HPA etherate and water, which was utilized as a main driving force for the transportation of building-blocks. The transmission electron microscopy, X-ray diffraction, FT-IR spectrum and NMR characterizations unambiguously demonstrate that this method allows the highly pure heteropoly acid nanocrystals with intact Keggin-type structure controlled directionally self-assembly within mesopores of silica SBA-15. Such method may open up a new entry to the highly pure multicomponent nanocrystalline particles inside the cavity of the porous materials.
Gu
Ying-Ying
YY
College of Science, University of Shanghai for Science and Technology, Shanghai 200093, PR China.
Yu
Shu-Yuan
SY
Kong
Ai-Guo
AG
Hua
Chun-Yan
CY
Ding
Han-Ming
HM
Shan
Yong-Kui
YK