(VO)2+ ions immobilized on functionalized surface of mesoporous silica and their activity toward the hydroxylation of benzene

Chia Hung Lee, Tien Sung Lin, Chung Yuan Mou

研究成果: 雜誌貢獻文章同行評審

65 引文 斯高帕斯(Scopus)

摘要

Mesoporous silica MCM-41 was organofunctionalized by 3-aminopropyltrimethoxysilane (APTS) on the surface of its nanochannels. The amino groups of the mesoporous MCM-41 solids were then used to immobilize (VO)2+ ions which were employed to study the catalytic oxidation of benzene. We found the vanadium peroxo complex of V5+-O-O radicals play an important role in the hydroxylation of aromatic hydrocarbons, such as from benzene to phenol. In a series of spectroscopic studies, we found the binding of ligands in these complexes depends on the surface density of APTS, which affects crucially its catalytic activity. The anchored vanadium complexes have better catalytic activities with higher stability than the framework-substituted V-MCM-41 materials. We further demonstrate that immobilization of catalytic metal ion on functionalized surface has the advantages of better control of available reactive sites and site isolation.

原文英語
頁(從 - 到)2543-2551
頁數9
期刊Journal of Physical Chemistry B
107
發行號11
DOIs
出版狀態已發佈 - 3月 20 2003
對外發佈

ASJC Scopus subject areas

  • 物理與理論化學
  • 表面、塗料和薄膜
  • 材料化學

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