Journal
GREEN CHEMISTRY
Volume 23, Issue 23, Pages 9489-9501Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1gc02353e
Keywords
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2019R1F1A1061214]
- Ministry of Trade, Industry and Energy [20005342]
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A single-step hydrothermal treatment was used to prepare 2D Lewis acidic zincosilicate and Lewis-Bronsted acidic ZnAl-DML catalysts, with Zn-DML being more delaminated than ZnAl-DML. Density functional theory calculations showed that heteroatom-substituted 2D MWW layers are more stable than their 3D analogues, and Al-containing systems are more stable than Zn.
Two-dimensional (2D) molecular sieves with highly dispersed active centers have great potential as catalysts for the transformation of bulky biomass derivatives owing to the ease of molecular diffusion and the deactivation resistance by coke deposition. Here, we report a single-step preparation of a 2D Lewis acidic zincosilicate delaminated MWW layer (Zn-DML) and Lewis-Bronsted acidic ZnAl-DML catalysts by a simple hydrothermal treatment of a borosilicate MWW precursor with Zn and/or Al precursor solutions. Both framework Zn and ultra-small Zn clusters are highly dispersed in Zn-DML, while framework Al species prevail over Zn in ZnAl-DML catalysts. Zn-DML catalysts are more delaminated than ZnAl-DML catalysts. Density functional theory calculations show that heteroatom-substituted 2D MWW layers are more stable than their 3D analogues, and Al-containing systems are more stable than Zn. Lewis acidic Zn-DML was selective for fructose, whereas Lewis-Bronsted acidic ZnAl-DML catalysts were selective for 5-hydroxymethylfurfural in the catalytic glucose conversion.
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