Microporous Brookite-Phase Titania Made by Replication of a Metal鈥揙rganic Framework

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• 作者：Anthony Shoji Hall ; Atsushi Kondo ; Kazuyuki Maeda ; Thomas E. Mallouk
• 刊名：Journal of the American Chemical Society
• 出版年：2013
• 出版时间：November 6, 2013
• 年：2013
• 卷：135
• 期：44
• 页码：16276-16279
• 全文大小：256K
• 年卷期：v.135,no.44(November 6, 2013)
• ISSN：1520-5126

文摘

Metal鈥搊rganic frameworks (MOFs) provide access to structures with nanoscale pores, the size and connectivity of which can be controlled by combining the appropriate metals and linkers. To date, there have been no reports of using MOFs as templates to make porous, crystalline metal oxides. Microporous titania replicas were made from the MOF template HKUST-1 by dehydration, infiltration with titanium isopropoxide, and subsequent hydrothermal treatment at 200 掳C. Etching of the MOF with 1 M aqueous HCl followed by 5% H₂O₂ yielded a titania replica that retained the morphology of the parent HKUST-1 crystals and contained partially ordered micropores as well as disordered mesopores. Interestingly, the synthesis of porous titania from the HKUST-1 template stabilized the formation of brookite, a rare titania polymorph.