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In-situ synthesis of interconnected SWCNT/OMC framework on silicon nanoparticles for high performance lithium-ion batteries

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green Energy & Environment 2016年第1期1卷 91-99页

作者： Weiwei Li Shimou Chen Jia Yu Daliang Fang Baozeng Ren Suojiang Zhang School of Chemical Engineering and Energy Zhengzhou University Beijing Key Laboratory of Ionic Liquids Clean Process Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of Sciences

In spite of silicon has a superior theoretical capacity, the large volume expansion of Si anodes during Li^+ insertion/extraction is the bottle neck that results in fast capacity fading and poor cycling performance. In this paper, we report a silicon, single-walled carbon nanotube, and ordered mesoporous carbon nanocomposite synthesized by an evaporation-induced self-assembly process, in which silicon nanoparticles and single-walled carbon nanotubes were added into the phenolic resol with F-127 for co-condensation. The ordered mesoporous carbon matrix and single-walled carbon nanotubes network could effectively accommodate the volume change of silicon nanoparticles, and the ordered mesoporous structure could also provide efficient channels for the fast transport of Li-ions. As a consequence, this hybrid material exhibits a reversible capacity of 861 mAh g^(-1) after 150 cycles at a current density of 400 mAg^(-1). It achieves significant improvement in the electrochemical performance when compared with the raw materials and Si nanoparticle anodes.

关键词： Silicon Single-walled carbon nanotube Ordered mesoporous carbon Lithium ion battery

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Self-Assembly of Porphyrin–Peptide Conjugates for Photothermal Therapy

Self-Assembly of Porphyrin–Peptide Conjugates for Photother...

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中国化学会第四届卟啉与酞菁学术研讨会

作者： Luyang Zhao Qianli Zou Manzar Abbas Xuehai Yan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of Sciences

Porphyrin has become a potential photothermal sensitizer,while high therapeutic and targeting efficiencies are still *** by the biological organization of peptides,we developed a supramolecular strategy to fabricate efficient photothermal nanoparticles through peptide-modulated self-assembly of photoactive porphyrins.A series of peptide conjugated porphyrin compounds including porphyrin-Phe-Phe-OH and porphyrin-Asp-Asp-OH was synthesized,which as assembly units were fabricated to monodispersed and stable *** to the formation of J-aggregates of porphyrin in assembled nanoparticles,fluorescent emission and singlet oxygen production were totally inhibited,which in turn lead to a high light-to-heat conversion *** differenct hydrophilicity of conjugated peptides influenced the size and stability of the nanoparticles *** to molecular simulation,the peptide moieties provided both aqueous stability for the nanoparticles through hydrophilic interactions and a spatial hindrance between porphyrin moieties to inhibit further growth of *** the nanoparticles of porphyrin-Phe-Phe-OH,in vitro and in vivo thermographic imaging reveals that the conversion of light to heat based on the nanoparticles is efficient,enabling the nanoparticles to be applied for photothermal acoustic imaging and antitumor therapy.

关键词： Porphyrin Self-assembly Peptide Photothermal therapy Molecular dynamics

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Multi-objective optimization of biomass to biomethane system

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green Energy & Environment 2016年第2期1卷 156-165页

作者： Nana Yan Baozeng Ren Bin Wu Di Bao Xiangping Zhang Jingheng Wang State Key Laboratory of Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences School of Chemical Engineering and Energy Zhengzhou University

The superstructure optimization of biomass to biomethane system through digestion is conducted in this work. The system encompasses biofeedstock collection and transportation, anaerobic digestion, biogas upgrading, and digestate recycling. We propose a multicriteria mixed integer nonlinear programming(MINLP) model that seeks to minimize the energy consumption and maximize the green degree and the biomethane production constrained by technology selection, mass balance, energy balance, and environmental impact. A multi-objective MINLP model is proposed and solved with a fast nondominated sorting genetic algorithm Ⅱ(NSGA-Ⅱ). The resulting Pareto-optimal surface reveals the trade-off among the conflicting objectives. The optimal results indicate quantitatively that higher green degree and biomethane production objectives can be obtained at the expense of destroying the performance of the energy consumption objective.

关键词： Multiobjective optimization Biomass to biomethane system green degree Mixed-integer nonlinear programming

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Bio-inspired photosystem for green energy

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green Energy & Environment 2017年第2期2卷 66-66页

作者： Xuehai Yan State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Center for Mesoscience Institute of Process Engineering Chinese Academy of Sciences

Science,2016,351,74-77;***.,2016,55,12503-12507Over billions years of evolution,biosystems have developed elaborate architectures to realize efficient substance metabolism and energy *** and/or mimicking biological process has provided us an elegant strategy for design and fabrication of biologically functional systems,such as *** realize efficient energy production,it

关键词： Bio-inspired photosystem for green energy

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A Hollow Multi‐Shelled Structure for Charge Transport and Active Sites in Lithium‐Ion Capacitors

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Angewandte Chemie 2020年第12期132卷

作者： Ruyi Bi Nan Xu Hao Ren Nailiang Yang Yonggang Sun Anmin Cao Ranbo Yu Dan Wang School of Metallurgical and Ecological Engineering University of Science and Technology Beijing No. 30 Xueyuan Road Haidian District Beijing 100083 P. R. China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences 1 North 2nd Street Zhongguancun Haidian District Beijing 100190 P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology and CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China Laboratory of Material Processing and Mold Ministry of Education Zhengzhou University Zhengzhou 450001 P. R. China

The lithium‐ion capacitor (LIC) has attracted tremendous research interest because it meets both the requirement on high energy and power densities. The balance between effective surface areas and mass transport is highly desired to fabricate the optimized electrode material for LIC. Now, triple‐shelled (3S) Nb 2 O 5 hollow multi‐shelled structures (HoMSs) were synthesized for the first time through the sequential templating approach and then applied for the anode of LIC. The unique structure of HoMSs, such as large efficient surface area, hierarchical pores, and multiple shells, provides abundant reaction sites, decreases the electron transport resistance, and increases the diffusion rate for ion transport. In this case, the best combination performance has been achieved among all the reported Nb 2 O 5 ‐based materials, which delivered an excellent energy and power densities simultaneously, and superb cycling stability.

关键词： Hohle Strukturen Lithium-Ionen-Kondensatoren Mehrlagige Strukturen Nb2O5

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Regulating sulfur removal efficiency of fuels by Lewis acidity of ionic liquids

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Science China Chemistry 2016年第5期59卷 526-531页

作者： Yi Nie Yuxiao Dong Hongshuai Gao Xiangping Zhang Suojiang Zhang Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China College of Chemistry and Chemical Engineering Qufu Normal UniversityQufu 273165China

It is urgent to develop a new deep desulfurization process of fuels as the environmental pollution increases seriously. In this work, a series of Lewis acidic ionic liquids （ILs） [C43MPy]Cl/nZnCl2 （n=1, 1.5, 2, 3） were synthesized and used in extraction and catalytic oxidative desulfurization （ECOD） of the fuels. The effects of the Lewis acidity of ILs, the molar ratio of H2O2/sulfur, temperatures, and different substrates including dibenzothiophene （DBT）, benzothiophene （BT） and thiophene （TS）, on sulfur removal were investigated. The results indicated that [C43MPy]Cl/3ZnCl2 presented near 100% DBT removal of model oil under conditions of 323 K, H2O2/DBT molar ratio 6：1. Kinetics for the removal of DBT, BT and TS by the [C43MPy]Cl/3ZnCl2-H2O2 system at 323 K is first-order with the apparent rate constants of 1.1348, 0.2226 and 0.0609 h-1, and the calculated apparent activation energies for DBT, BT and TS were 61.13, 60.66, and 68.14 kJ/mol from 298 to 308 K, re- spectively. After six cycles of the regenerated [C43MPy]Cl/3ZnCl2, the sulfur removal had a slight decrease. [C43MPy]Cl/ 3ZnCl2 showed a good desulfurization performance under optimal conditions.

关键词： desulfurization Lewis acidity ionic liquids extractant catalyst

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Simultaneous biosynthesis of (R)-acetoin and ethylene glycol from D-xylose through in vitro metabolic engineering

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Metabolic engineering Communications 2018年 7卷 e00074-e00074页

作者： Jia, Xiaojing Kelly, Robert M. Han, Yejun National Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China Department of Chemical and Biomolecular Engineering North Carolina State University Raleigh 27695-7905 NC United States

(R)-acetoin is a four-carbon platform compound used as the precursor for synthesizing novel optically active materials. Ethylene glycol (EG) is a large-volume two-carbon commodity chemical used as the anti-freezing agent and building-block molecule for various polymers. Currently established microbial fermentation processes for converting monosaccharides to either (R)-acetoin or EG are plagued by the formation of undesirable by-products. We show here that a cell-free bioreaction scheme can generate enantiomerically pure acetoin and EG as co-products from biomass-derived D-xylose. The seven-step, ATP-free system included in situ cofactor regeneration and recruited enzymes from Escherichia coli W3110, Bacillus subtilis shaijiu 32 and Caulobacter crescentus CB 2. Optimized in vitro biocatalytic conditions generated 3.2 mM (R)-acetoin with stereoisomeric purity of 99.5% from 10 mM D-xylose at 30 °C and pH 7.5 after 24 h, with an initial (R)-acetoin productivity of 1.0 mM/h. Concomitantly, EG was produced at 5.5 mM, with an initial productivity of 1.7 mM/h. This in vitro biocatalytic platform illustrates the potential for production of multiple value-added biomolecules from biomass-based sugars with no ATP requirement. © 2018 The Authors

关键词： (R)-acetoin Cofactor regeneration D-xylose Ethylene glycol In vitro metabolic engineering

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Phosphate enrichment mechanism in CaO–SiO_2–FeO–Fe_2O_3–P_2O_5 steelmaking slags with lower binary basicity

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International Journal of Minerals,Metallurgy and Materials 2016年第5期23卷 520-533页

作者： Jin-yan Li Mei Zhang Min Guo Xue-min Yang State Key Laboratory of Advanced Metallurgy School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083China Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China

The addition of silica to steelmaking slags to decrease the binary basicity can promote phosphate enrichment in quenched slag samples. In this study, we experimentally investigated phosphate enrichment behavior in CaO-SiO2-FeO-Fe203-P205 slags with a P205 content of 5.00% and the binary basicity B ranging from 1.0 to 2.0, where the （%Fe/O）/（%CaO） mass percentage ratio was maintained at 0.955. The experimental results are explained by the defined enrichment degree c, of solid solution 2CaO·SiO2-3CaO·P205 （C2S-C3P）, where R_C2S-C3P is a component of the developed ion and molecule coexistence theory （IMCT）-Ni model for calculating the mass action concentrations Ni of structural units in the slags on the basis of the IMCT. The asymmetrically inverse V-shaped relation be- tween phosphate enrichment and binary basicity B was observed to be correlated in the slags under applied two-stage cooling conditions. The maximum content of PROs in the C2S-C3P solid solution reached approximately 30.0% when the binary basicity B was controlled at 1.3.

关键词： phosphates enrichment mechanisms steelmaking slags basicity

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COVID‐19 Vaccines: Particulate Alum via Pickering Emulsion for an Enhanced COVID‐19 Vaccine Adjuvant (Adv. Mater. 40/2020)

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Advanced Materials 2020年第40期32卷

作者： Sha Peng Fengqiang Cao Yufei Xia Xiao‐Dong Gao Lianpan Dai Jinghua Yan Guanghui Ma State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P. R. China Key Laboratory of Carbohydrate Chemistry and Biotechnology Ministry of Education School of Biotechnology Jiangnan University Wuxi Jiangsu 214122 P. R. China Graduate School of Bio‐Applications and Systems Engineering Tokyo University of Agriculture and Technology 2‐24‐16 Nakacho Koganei Tokyo 184‐8588 Japan University of Chinese Academy of Sciences Beijing 100049 P. R. China Innovation Academy for Green Manufacture Chinese Academy of Sciences Beijing 100190 P. R. China Beijing Institute of Life Science Chinese Academy of Sciences Beijing 100101 P. R. China Institute of Microbiology Chinese Academy of Sciences Beijing 100101 P. R. China

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Fabrication of dense Si3N4 ceramics via coating amorphous Si3N4 nano-powders by sodium reduction in liquid ammonia

Fabrication of dense Si3N4 ceramics via coating amorphous Si...

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作者： Wang, Qi Yang, Mei Xiao, Jiusan Zhu, Hongmin School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing100083 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Department of Metallurgy Graduate School of Engineering Tohoku University Sendai980-8579 Japan

Commercial Si3N4 powders coated with 030% amorphous Si3N4 nano-powders were fabricated successfully. Amorphous Si3N4 nano-powders coating were prepared through the reduction of silicon tetrachloride (SiCl4) by sodium in liquid ammonia at 45C. Dense Si3N4 ceramics with 97.2% relative density of theoretic value were obtained from Si3N4 micro-powders coated with 30% nano-powders sintered by spark plasma sintering at 1500C without sintering additives. © 2017 The Ceramic Society of Japan. All rights reserved.

关键词： Fabrication

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