Design of a robust catalyst with high activity but the low cost for the hydrodeoxygenation(HDO) of biooils is of great importance to bring the biorefinery concept into reality.In this study,density functional theory(D...Design of a robust catalyst with high activity but the low cost for the hydrodeoxygenation(HDO) of biooils is of great importance to bring the biorefinery concept into reality.In this study,density functional theory(DFT) calculation was adopted to analyze the optimal location of Ni on MoO_(3-x) containing oxygen vacancy,and the corresponding result demonstrated that metallic Ni cluster located at the neighborhood of oxygen vacancies would significantly evoke HDO activity.Enlightened by DFT results,NiMoO_(4) was first hydrothermally synthesized and then employed to fabricate Ni-MoO_(3-x) catalyst via a low-temperature reduction,where Ni escaped from NiMoO_(4) and was reduced to its metallic state.Such an evolution of Ni species also induced the formation of oxygen vacancies around metallic Ni cluster.In the HDO of p-cresol,Ni-MoO_(3-x) exhibited high activity with a complete conversion and a methylcyclohexane selectivity of 99.4% at 150℃.Moreover,the catalyst showed good versatility in catalyzing HDO of diverse lignin-derived oxygenates and lignin oil.2D HSQC NMR,gas chromatograph and elemental analysis of the lignin oil demonstrated the high deoxygenation efficiency and saturation of the benzene ring over Ni-MoO_(3-x).In the upgrading of crude lignin oil,the deoxygenation degree was up to 99%,and the overall carbon yield of the naphthenes was as high as 69.4%.Importantly,the structures and carbon numbers of the naphthene products are similar to jet fuel-range cycloalka nes,which are expected to have a high density that can be blended into jet fuel to raise the range(or payload) of airplanes.This work demonstrates the feasibility for improving the targeted catalytic reactivity by rational tailoring the catalyst structure under the guidance of theoretical analysis,and provides an energy-efficient route for the upgrading of lignin crude oil into valuable naphthenes.展开更多
目的:构建GTP酶激活蛋白SH3功能区结合蛋白1(G3BP1)的真核表达载体p EGFP-C3-G3BP1,并观察其在人食管癌EC109细胞中的表达及定位。方法:采用RT-PCR法从EC109细胞中扩增G3BP1 c DNA全长序列,用限制性内切酶HindⅢ和BamHⅠ双酶切PCR产物...目的:构建GTP酶激活蛋白SH3功能区结合蛋白1(G3BP1)的真核表达载体p EGFP-C3-G3BP1,并观察其在人食管癌EC109细胞中的表达及定位。方法:采用RT-PCR法从EC109细胞中扩增G3BP1 c DNA全长序列,用限制性内切酶HindⅢ和BamHⅠ双酶切PCR产物后克隆至pEGFP-C3载体,转化大肠杆菌DH5α后,挑取阳性克隆提取质粒,经双酶切及测序鉴定;将重组质粒用脂质体法转染EC109细胞,荧光定量RT-PCR和Western印迹检测G3BP1的表达,荧光显微镜观察G3BP1的定位。结果:目的基因G3BP1的序列完全正确,并在EC109细胞中获得表达,荧光显微镜观察显示G3BP1定位于细胞质。结论:构建了p EGFP-C3-G3BP1真核表达载体,并在EC109细胞中过表达,G3BP1蛋白定位于细胞质,形成应激颗粒(stress granules,SGs)。为进一步探讨G3BP1在食管癌细胞中的功能及其与SGs的相关性奠定了基础。展开更多
基金supported by the National Key R&D Program of China (2022YFB3805401, 2019YFC1905300)the National Natural Science Foundation of China (22178297)+1 种基金the Hunan Provincial Natural Science Foundation (2022JJ40425, 2022JJ40432)the Process Intensification and Green Chemical Engineering Innovation Team of Hunan Province。
文摘Design of a robust catalyst with high activity but the low cost for the hydrodeoxygenation(HDO) of biooils is of great importance to bring the biorefinery concept into reality.In this study,density functional theory(DFT) calculation was adopted to analyze the optimal location of Ni on MoO_(3-x) containing oxygen vacancy,and the corresponding result demonstrated that metallic Ni cluster located at the neighborhood of oxygen vacancies would significantly evoke HDO activity.Enlightened by DFT results,NiMoO_(4) was first hydrothermally synthesized and then employed to fabricate Ni-MoO_(3-x) catalyst via a low-temperature reduction,where Ni escaped from NiMoO_(4) and was reduced to its metallic state.Such an evolution of Ni species also induced the formation of oxygen vacancies around metallic Ni cluster.In the HDO of p-cresol,Ni-MoO_(3-x) exhibited high activity with a complete conversion and a methylcyclohexane selectivity of 99.4% at 150℃.Moreover,the catalyst showed good versatility in catalyzing HDO of diverse lignin-derived oxygenates and lignin oil.2D HSQC NMR,gas chromatograph and elemental analysis of the lignin oil demonstrated the high deoxygenation efficiency and saturation of the benzene ring over Ni-MoO_(3-x).In the upgrading of crude lignin oil,the deoxygenation degree was up to 99%,and the overall carbon yield of the naphthenes was as high as 69.4%.Importantly,the structures and carbon numbers of the naphthene products are similar to jet fuel-range cycloalka nes,which are expected to have a high density that can be blended into jet fuel to raise the range(or payload) of airplanes.This work demonstrates the feasibility for improving the targeted catalytic reactivity by rational tailoring the catalyst structure under the guidance of theoretical analysis,and provides an energy-efficient route for the upgrading of lignin crude oil into valuable naphthenes.
