Fine-tuning the local structure and catalytic activity of titanium-amine functionalized silica in oxidation of limonene by aqueous hydrogen peroxide

Titanium-amine functionalized silica was successfully prepared by a so-called one-pot approach by using 3-aminopropyltrimethoxysilane (APTMS), tetraethoxysilane (TEOS) and titanium(IV) sulfate as precursors. It is demonstrated that the TEOS/APTMS molar ratio in the synthesis of titanium-amine functionalized silica affected the local coordination of titanium and its corresponding positive impact on catalytic activity in oxidation of limonene by aqueous hydrogen peroxide.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Titanium-amine functionalized silica is synthesized by one-pot approach. ► The fine-tuning local structure titanium-amine functionalized silica. ► The local coordination of titanium affected by TEOS/APTMS molar ratio. ► The local structure of titanium affects catalytic activity in oxidation of limonene.