Heterometallic metal-organic framework-templated synthesis of porous Co{sub 3}O{sub 4}/ZnO nanocage catalysts for the carbonylation of glycerol
- State Key Laboratory for Physical Chemistry of Solid Surfaces&Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005 (China)
The efficient synthesis of glycerol carbonate (GLC) has recently received great attention due to its significance in reducing excess glycerol in biodiesel production as well as its promising applications in several industrial fields. However, the achievement of high conversion and high selectivity of GLC from glycerol in heterogeneous catalytic processes remains a challenge due to the absence of high-performance solid catalysts. Herein, highly porous nanocage catalysts composed of well-mixed Co{sub 3}O{sub 4} and ZnO nanocrystals were successfully fabricated via a facile heterometallic metal-organic framework (MOF)-templated synthetic route. Benefiting from a high porosity and the synergistic effect between Co{sub 3}O{sub 4} and ZnO, the as-prepared composite catalysts exhibited a significantly enhanced production efficiency of GLC in the carbonylation reaction of glycerol with urea compared to the single-component counterparts. The yield of GLC over the Co{sub 50}Zn{sub 50}-350 catalyst reached 85.2%, with 93.3% conversion and near 91% GLC selectivity, and this catalytic performance was superior to that over most heterogeneous catalysts. More importantly, the proposed templated synthetic strategy of heterometallic MOFs facilitates the regulation of catalyst composition and surface structure and can therefore be potentially extended in the tailoring of other metal oxide composite catalysts. - Graphical abstract: Highly porous Co{sub 3}O{sub 4}/ZnO nanocages were fabricated via a heterometallic MOF-templated route and exhibited a significantly enhanced photocatalytic performance in the production of glycerol carbonate. Display Omitted - Highlights: • Porous Co{sub 3}O{sub 4}/ZnO nanocages were synthesized by a facile thermolysis route of heterometallic MOFs. • The as-prepared nanocages possessed massive pores and Co{sub 3}O{sub 4}/ZnO heterojunctions. • The Co{sub 3}O{sub 4}/ZnO ratio in the composites was easily adjusted by tuning the Co/Zn ratio in the precursors. • The composite catalysts exhibited a significantly enhanced production efficiency of glycerol carbonate in the carbonylation reaction of glycerol with urea.
- OSTI ID:
- 22742069
- Journal Information:
- Journal of Solid State Chemistry, Vol. 256; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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