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Ti functionalized hierarchical-pore UiO-66(Zr/Ti) catalyst for the transesterification of phenyl acetate and dimethyl carbonate

Abstract

Titanates are frequently used as precursors to prepare transesterification catalysts with TiIV species. Unfortunately, it is challenging to control the dispersity of TiIV active sites on supports. Herein, a series TiIV species are anchored on abundant linker vacancy sites by introducing point and large scale defects in a UiO-66(Zr/Ti) with hierarchical-pore structure. The catalyst functionalized by titanium(IV) oxide bis(2,4-pentanedionate) shows excellent catalytic performance in the transesterification of dimethyl carbonate with phenyl acetate. The catalysts are characterized by XRD, FT-IR, N2 adsorption-desorption, XPS, SEM and STEM-HAADF techniques. The results demonstrate that the delicate mesopores in the support can not only exhibit a large surface area for the distribution of the active sites but also provide better mass transfer performance. Meanwhile, the introduction of octahedral TiIV ions raise the activity of the catalyst via more coordinatively unsaturated ZrIV sites. Furthermore, using titanium(IV) oxide bis(2,4-pentanedionate) as a Ti source can effectively prevent the condensation of tetrahedral TiIV species anchored on hierarchical-pore UiO-66(Zr/Ti) support

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Publication details

The article was received on 15 Aug 2019, accepted on 08 Oct 2019 and first published on 09 Oct 2019


Article type: Paper
DOI: 10.1039/C9NJ04241E
New J. Chem., 2019, Accepted Manuscript

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    Ti functionalized hierarchical-pore UiO-66(Zr/Ti) catalyst for the transesterification of phenyl acetate and dimethyl carbonate

    B. Jia, M. Wu, H. Zhang, Y. Zeng and G. Wang, New J. Chem., 2019, Accepted Manuscript , DOI: 10.1039/C9NJ04241E

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