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方真教授团队:Biomass-derived mesoporous Hf-containing hybrid for efficient Meerwein-Ponndorf-Verley reduction at low temperatures
发布时间 : 2018-01-27 方真教授团队  已浏览:

最近,国际学术期刊Applied Catalysis B: Environmental(第一署名单位为南京农业大学,第一作者为博士后李虎,通讯作者为方真教授)发表了生物燃料最新研究成果。

李虎博士通过简单的组装2,5-呋喃二甲酸(FDCA)和金属铪(Hf),制备出一种新型介孔双功能的混合物(FDCA-Hf),它高度稳定和活跃,可用于酸碱协同催化生物基化合物如酮,醛和高酸值油低温高效生产生物燃料和有价值的化学品。

详情可见:

H Li , TT Yang, Zhen Fang*, Biomass-derived Mesoporous Hf-containing Hybrid for Efficient Meerwein-Ponndorf-Verley Reduction at Low Temperatures. Applied Catalysis B: Environmental (IF 11.7), 227, 79–89 (2018).

说明: abstract graph

Recently, Dr. Hu Li supervised by Prof. Zhen Fang designed and prepared a new porous and acid-base bifunctional hybrid (FDCA-Hf) by simple assembly of biomass-derived 2,5-furandicarboxylic acid (FDCA) with hafnium (Hf) under template-free conditions. The resulting FDCA-Hf hybrid with mesopores centered at 6.9 nm, moderate surface area (365.8 m2/g) and acid-base couple sites (density: 0.51 vs 0.97 mmol/g, acid/base molar ratio: 0.53), could selectively catalyze the Meerwein-Ponndorf-Verley reduction of carbonyl compounds under mild reaction conditions (as low as 90 ºC in a short time of 1 h), especially of ethyl levulinate to γ-valerolactone, in quantitative yields (95-100%) and relatively higher reaction rate (e.g., turnover frequency: 2.28 h-1) compared to other catalysts. Moreover, the efficient simultaneous (trans)esterification of Jatropha oils with high acidic values to biodiesel (up to 98% yield) could also be achieved over FDCA-Hf with robust acid-base catalytic sites. The FDCA-Hf hybrid was highly stable due to the presence of robust metal-organic framework and could be resued with no decline in activity. Further studies demonstrated that the synergistic role of Lewis acid-base couple species (Hf4+–O2–) and Br➢nsted acidic species (-OH) of FDCA-Hf contributed greatly to its pronounced catalytic activity.

Related results were published:

H Li , TT Yang, Zhen Fang*, Biomass-derived Mesoporous Hf-containing Hybrid for Efficient Meerwein-Ponndorf-Verley Reduction at Low Temperatures. Applied Catalysis B: Environmental (IF 11.7), 227, 79–89 (2018).

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