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Breakthroughs on tailoring membrane materials for ethanol recovery by pervaporation

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Chinese Journal of Chemical Engineering 2022年第12期52卷 19-36页

作者： Xia Zhan Xueying Zhao Zhongyong Gao Rui Ge Juan Lu Luying Wang Jiding Li key laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry Beijing Technology and Business UniversityBeijing 100048China The Institute of medicinal Plant Development The Chinese Academy of Medical Sciences(CAMS)and Peking Union Medical College(PUMC)Beijing 100193China Beijing key laboratory of Lignocellulosic chemistry Beijing Forestry UniversityBeijing 100083China The State key laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Bioethanol, as a clean and renewable fuel, has gained increasing attention due to its major environmental benefits. Pervaporation(PV) is a promising and competitive technique for the recovery of ethanol from bioethanol fermentation systems due to the advantages of environmental friendliness, low energy consumption and easy coupling with fermentation process. The main challenge for the industrial application of ethanol perm-selective membranes is to break the trade-off effect between permeability and selectivity. As membrane is the heart of the pervaporation separation process, this article attempts to provide a comprehensive survey on the breakthroughs of ethanol perm-selective PV membranes from the perspectives of tailoring membrane materials to enhance PV separation performance. The research and development of polymeric and organic/inorganic hybrid membranes are reviewed to explore the fundamental structure-property-performance relationships. It is found that mixed matrix membranes with welldesigned membrane structures offer the hope of better control overphysi-/chemical microenvironment and cavity/pore size as well as size distribution, which may provide both high permeability and membrane selectivity to break the trade-off effect. The tentative perspective on the possible future directions of ethanol perm-selective membranes is also briefly discussed, which may provide some insights in developing a new generation of high-performance PV membranes for ethanol recovery.

关键词： Pervaporation Ethanol recovery Microstructure Polymeric membrane Mixed matrix membrane

Surface Modification of Biodegradable Poly(D,L-lactic acid) by Nitrogen and Nitrogen/Hydrogen Plasma for Improving Surface Hydrophilicity

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Plasma Science and Technology 2011年第2期13卷 230-234页

作者：赵国巍高俊萍高强陈亚芍 key laboratory of Applied Surface and Colloid chemistry (Shaanxi Normal University) Ministry of Education School of Chemistry and Materials Science key laboratory of Modern Preparation of TCM Ministry of Education Jiang Xi University of Traditional Chinese Medicine School of Pharmacy Fourth Military Medical University

Enhancement of the surface hydrophilicity of biodegradable poly （D,L-lactic acid）（PLA） films is studied. The PLA films were treated by nitrogen plasma （PLA-N2） and nitro- gen/hydrogen plasma （PLA-N2/H2）, respectively. The surface properties and microstructure of PLA-N2 and PLA-N2/H2 were studied by static contact angle measurement, surface free energy calculation, X-ray photoelectron spectroscopy （XPS） and atomic force microscopy （AFM）. It is confirmed that the surface hydrophilicity of PLA-N2 and PLA-N2/H2 was higher than that of pristine PLA, and the surface hydrophilicity of PLA-N2 films was better than that of PLA-N2/H2.

关键词： plasma surface modification PLA films hydrophilicity

简易合成具有增强电荷转移的Z型CeO_(2)/C_(3)N_(4)异质结用于光催化CO_(2)还原

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中国科学:材料科学(英文版) 2023年第8期66卷 3165-3175页

作者：陈杰肖玉婷汪楠康鑫王东旭王春雁刘健聪姜昱辰付宏刚 key laboratory of Functional Inorganic Material chemistry Ministry of EducationHeilongjiang UniversityHarbin 150080China key laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063China

利用太阳能将CO_(2)转化为增值燃料,对于实现全球碳中和的目标具有重要意义,而光生电荷的有效分离是提高光催化CO_(2)还原效率的重要影响因素.在此,我们报道了一种简易的原位剥离和转化策略,将CeO_(2)纳米颗粒均匀分布在超薄多孔C_(3)N_... 详细信息

利用太阳能将CO_(2)转化为增值燃料,对于实现全球碳中和的目标具有重要意义,而光生电荷的有效分离是提高光催化CO_(2)还原效率的重要影响因素.在此,我们报道了一种简易的原位剥离和转化策略,将CeO_(2)纳米颗粒均匀分布在超薄多孔C_(3)N_(4)纳米片上,合成了新型的CeO_(2)/C_(3)N_(4)异质结构.C_(3)N_(4)的超薄多孔结构不仅可以增加比表面积以提供更多的活性位点,还可以有效缩短光生电子空穴的迁移距离以避免复合.此外,高度分散的CeO_(2)与C_(3)N_(4)之间具有紧密的界面接触,使更多的电荷通过界面进行转移.合成的CeO_(2)/C_(3)N_(4)异质结构具有带隙匹配的Z型结构,可以有效延长光诱导电荷载流子的寿命并提升光催化剂的氧化还原能力.与传统块状C_(3)N_(4)相比,合成的CeO_(2)/C_(3)N_(4)异质结在没有贵金属作为助催化剂和没有牺牲剂条件下显示出约5倍的CO_(2)光还原性能的提升.这项工作为用于可持续能源转换的直接Z型光催化剂的设计和实际应用提供了一种新策略.

关键词：氧化还原能力电荷转移光还原助催化剂电荷载流子可持续能源异质结构光催化

Recent advances for the production of hydrocarbon biofuel via deoxygenation progress

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Science Bulletin 2015年第24期60卷 2096-2106页

作者： Dan Li Hui Xin Xiangzhe Du Xiaolei Hao Qingxue Liu Changwei Hu key laboratory of Green chemistry and Technology Ministry of Education College of Chemistry Sichuan University College of Chemical Engineering Sichuan University

The current world energy crisis and increasing environmental concerns over global climate change from combusting fossil fuel are driving researchers into a new route to produce fuels via sustainable resource to meet the demands of human. In recent years, deoxygenation as an alternative method has been applied in the production of hydrocarbon fuels, particularly via the deoxygenation of fatty acids and triglycerides from seed oils and fats, producing hydrocarbon fuels entirely fungible with fossil fuels. The deoxygenation of biobased feedstock to fuel-like hydrocarbons is critically reviewed in this article. The review mainly discusses the use of feedstock, innovation of catalysts, and the reaction mechanism involved in the production of hydrocarbon fuels via deoxygenation progress.

关键词：下线服务迁移

Synthesis,Crystal Structure and Fluorescence Properties of a 3D Framework Based on Hexanuclear Lanthanum 5-Nitroisophthalate Entities

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Chinese Journal of Structural chemistry 2012年第8期31卷 1194-1200页

作者：王新芳许颜清黄现强胡长文 School of chemistry Beijing Institute of Technology and Key Laboratory of Cluster ScienceMinistry of Education of China Department of chemistry Dezhou University

The reaction of lanthanum（Ⅲ） nitrate and 5-nitroisophthalic acid in isopropanol/H2O under hydrothermal conditions leads to a 3D lanthanum-containing coordination polymer with the general chemical formula {[La6（Nip）9（H2O）4 ]·（H2O）4 }∞（1,Nip=5-nitroisophthalate）.The single-crystal X-ray analyses show that this compound crystallizes in the orthorhombic system,space group Ima2 with a=9.7769（12）,b=28.239（3）,c=21.149（2）,V=5839.1（11）3,Z=2,Mr=2859.61,Dc =1.626 g/cm 3,F（000）=2752.14040 reflections are collected,of which 5275 are unique （R int=0.0241）.Final GOOF=1.083,R=0.0406 and wR=0.1182,R indices based on 5183 reflections with I〉2σ（I）（refinement on F2）,443 parameters,1 *** and absorption corrections were applied,=*** structure parameter x=0.08（3）.The crystal structure can be described as the butterfly-liked hexanuclear lanthanum entities {La6O6（CO2）8 } covalently linked to each other by nitroisophthalate ligands into an intricate three-dimensional *** fluorescence spectroscopy of compound 1 has been investigated.

关键词： lanthanum 5-nitroisophthalic acid coordination polymer

Conformational dynamics as an intrinsic determinant of prion protein misfolding and neurotoxicity

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Neural Regeneration Research 2024年第10期19卷 2095-2096页

作者： Alessandro Cembran Pedro Fernandez-Funez Department of chemistry and Biochemistry University of Minnesota DuluthDuluthMNUSA Department of Biomedical Sciences University of Minnesota Medical SchoolDuluth CampusDuluthMNUSA

The prion protein(PrP) is the key molecular and pathological mediator of prion diseases,a heterogeneous group of brain disorders with fatal *** diseases are rare but deserve special attention because of their unique f... 详细信息

关键词： folding intrinsic dynamics

Ion-vacancy coupled charge transfer model for ion transport in concentrated solutions

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Science China chemistry 2019年第4期62卷 515-520页

作者： Yu Gao Jun Huang Yuwen Liu Jawei Yan Bingwei Mao Shengli Chen Hubei key laboratory of Electrochemical Power Sources Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education) Department of Chemistry Wuhan University Hunan Provincial key laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering Central South University State key laboratory of Physical chemistry of Solid Surfaces Department of Chemistry Xiamen University

We present a conceptual framework for understanding and formulating ion transport in concentrated solutions, which pictures the ion transport as an ion-vacancy coupled charge transfer reaction. A key element in this picture is that the transport of an ion from an occupied to unoccupied site involves a transition state which exerts double volume exclusion. An ab initio random walk model is proposed to describe this process. Subsequent coarse-graining results in a continuum formula as a function of chemical potentials of the constituents, which are further derived from a lattice-gas model. The subtlety here is that what has been taken to be the chemical potential of the ion in the past is actually that of the ion-vacancy couple. By aid of this new concept, the driving force of ion transport is essentially the chemical affinity of the ion-vacancy coupled charge transfer reaction, which is a useful concept to unify transport and reaction, two fundamental processes in electrochemistry. This phenomenological model is parameterized for a specific material by the aid of first-principles calculations. Moreover, its extension to multiple-component systems is discussed.

关键词： concentrated solutions ion dynamics ion volume effect chemical affinity ion-vacancy couple

Catalyst-free and atom-economical 1,3-dipolar cycloaddition of C,N-cyclic azomethine imines:Facile synthesis of isoquinoline-fused spirocycles

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Green Synthesis and Catalysis 2022年第1期3卷 69-78页

作者： Lesong Li Tao Liu Xiaoli Zhang Xiaohan Hou Hao Dong Xiaoyang Li Weiwu Ren Yang Wang molecular Synthesis Center&key laboratory of Marine Drugs Chinese Ministry of EducationSchool of Medicine and PharmacyOcean University of ChinaQingdao 266003China laboratory for Marine Drugs and Bioproducts Qingdao National Laboratory for Marine Science and Technology(QNLM)Qingdao 266237China

A highly efficient and environmentally benign 1,3-dipolar cycloaddition of C,N-cyclic azomethine imines with 5-alkenyl thiazolones and 2-arylidenindane-1,3-diones is developed for the construction of congested quaternary spiro-carbon *** these transformations can be smoothly performed in ethanol at room temperature,providing a catalyst-free and atom-economical access to diversely substituted novel isoquinoline-fused spirocycles in almost quantitative yields with high *** promising anti-tumor activity of these structurally novel spirocyclic compounds is reported as well.

关键词： Catalyst-free Atom-economical 1,3-Dipolar cycloaddition C,N-cyclic azomethine imine 5-Alkenyl thiazolone 2-Arylidenindane-1,3-dione

Solution-processed halide perovskite microcavity exciton-polariton light-emitting diodes working at room temperature

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Photonics Research 2023年第10期11卷 1791-1801页

作者： TIANYU LIU PENG RAN YIRONG SU ZENG CHEN RENCHEN LAI WEIDONG SHEN YAOGUANG MA HAIMING ZHU YANG(MICHAEL)YANG State key laboratory of Modern Optical Instrumentation Institute for Advanced PhotonicsCollege of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China State key laboratory of Modern Optical Instrumentation Key Laboratory of Excited State Materials of Zhejiang ProvinceDepartment of ChemistryZhejiang UniversityHangzhou 310027China Instrumentation and Service Center for molecular Sciences Westlake UniversityHangzhou 310024China

Exciton-polaritons offer the potential to achieve electrically pumped perovskite polariton lasers with much lower current thresholds than conventional photonic lasers. While optically pumped exciton-polaritons have been widely studied in halide perovskites, electrically-pumped polaritons remain limited. In this study, we demonstrate the use of a solution-processing strategy to develop halide perovskite polariton light-emitting diodes(LEDs) that operate at room temperature. The strong coupling of excitons and cavity photons is confirmed through the dispersion relation from angle-resolved reflectivity, with a Rabi splitting energy of 64 meV. Our devices exhibit angle-resolved electroluminescence following the low polariton branch and achieve external quantum efficiencies of 1.7%, 3.85%, and 3.7% for detunings of 1.1,-77, and-128 meV, respectively. We also explore devices with higher efficiency of 5.37% and a narrower spectral bandwidth of 6.5 nm through the optimization of a top emitting electrode. Our work demonstrates, to our knowledge, the first room-temperature perovskite polariton LED with a typical vertical geometry and represents a significant step towards realizing electrically pumped perovskite polariton lasers.

关键词： pumped diodes tuning