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Eco-CaMnOx: A Greener Generation of Eco-catalysts for Eco-friendly Oxidation Processes
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-03-04 , DOI: 10.1021/acssuschemeng.9b05444 Camille Bihanic 1 , Sébastien Diliberto 2 , Franck Pelissier 1 , Eddy Petit 3 , Clotilde Boulanger 2 , Claude Grison 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-03-04 , DOI: 10.1021/acssuschemeng.9b05444 Camille Bihanic 1 , Sébastien Diliberto 2 , Franck Pelissier 1 , Eddy Petit 3 , Clotilde Boulanger 2 , Claude Grison 1
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Owing to the alarming problems of depletion of mineral resources and ever-growing pollution by metallic elements, biosourced catalysts were prepared from Mn-accumulating plant species from a large-scale program of ecological rehabilitation of mining sites. This new generation of catalysts, “Eco-CaMnOx” catalysts, were obtained directly from a controlled thermal treatment of four species of Grevillea genus, a Mn-rich biomass, and without any further chemical treatment. Eco-CaMnOx catalysts were characterized by microwave plasma-atomic emission spectrometer, X-ray powder diffraction spectroscopy, high-resolution transmission electron microscopy, and scanning transmission electron microscopy-energy-dispersive X-ray spectroscopy. These analyses revealed a natural richness in two unusual and valuable mixed calcium–manganese oxides: Ca2Mn3O8 and CaMnO3. The high efficiency of Eco-CaMnOx catalysts was demonstrated via the epoxidation of various biosourced terpenes and lipids, using the mixture H2O2/NaHCO3 as a green co-oxidant. This study demonstrated not only the high potential of Eco-CaMnOx catalysts as alternatives to oxidative reagents prohibited by REACH regulation but also the efficient synthesis of biosourced epoxides, which can be used as monomers for the preparation of biodegradable polymers. Finally, the original composition of Eco-CaMnOx catalysts led to distinctive catalytic behaviors compared to previously studied Eco-Mn and Pyr-Mn, allowing the preparation of sensitive epoxides such as linalool epoxide.
中文翻译：
Eco-CaMnO x：环保氧化工艺的绿色环保催化剂
由于令人担忧的矿产资源枯竭和金属元素污染日益严重的问题，从锰矿富集的植物物种通过大规模矿区生态修复计划制备了生物来源的催化剂。新一代催化剂“ Eco-CaMnO x ”是直接通过对四种富含锰的生物质Grevillea属的受控热处理进行的，无需任何进一步的化学处理即可获得。生态CaMnO x用微波等离子体原子发射光谱仪，X射线粉末衍射光谱仪，高分辨率透射电子显微镜和扫描透射电子显微镜-能量分散X射线光谱仪对催化剂进行了表征。这些分析显示了两种不同寻常且有价值的混合钙锰氧化物的自然丰富性：Ca 2 Mn 3 O 8和CaMnO 3。使用混合物H 2 O 2 / NaHCO 3作为绿色助氧化剂，通过各种生物来源的萜烯和脂质的环氧化，证明了Eco-CaMnO x催化剂的高效性。这项研究不仅证明了Eco-CaMnO x的高潜力催化剂可作为REACH法规禁止的氧化剂的替代品，也可有效合成生物来源的环氧化物，可用作制备可生物降解聚合物的单体。最后，与先前研究的Eco-Mn和Pyr-Mn相比，Eco-CaMnO x催化剂的原始组成导致了独特的催化行为，从而允许制备敏感的环氧化物，例如芳樟醇环氧化物。
更新日期：2020-03-05
中文翻译：
Eco-CaMnO x：环保氧化工艺的绿色环保催化剂
由于令人担忧的矿产资源枯竭和金属元素污染日益严重的问题，从锰矿富集的植物物种通过大规模矿区生态修复计划制备了生物来源的催化剂。新一代催化剂“ Eco-CaMnO x ”是直接通过对四种富含锰的生物质Grevillea属的受控热处理进行的，无需任何进一步的化学处理即可获得。生态CaMnO x用微波等离子体原子发射光谱仪，X射线粉末衍射光谱仪，高分辨率透射电子显微镜和扫描透射电子显微镜-能量分散X射线光谱仪对催化剂进行了表征。这些分析显示了两种不同寻常且有价值的混合钙锰氧化物的自然丰富性：Ca 2 Mn 3 O 8和CaMnO 3。使用混合物H 2 O 2 / NaHCO 3作为绿色助氧化剂，通过各种生物来源的萜烯和脂质的环氧化，证明了Eco-CaMnO x催化剂的高效性。这项研究不仅证明了Eco-CaMnO x的高潜力催化剂可作为REACH法规禁止的氧化剂的替代品，也可有效合成生物来源的环氧化物，可用作制备可生物降解聚合物的单体。最后，与先前研究的Eco-Mn和Pyr-Mn相比，Eco-CaMnO x催化剂的原始组成导致了独特的催化行为，从而允许制备敏感的环氧化物，例如芳樟醇环氧化物。
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