检索结果-内蒙古大学图书馆

Enhanced catalytic conversion of polysulfides using high-percentage 1T-phase metallic WS_(2) nanosheets for Li–S batteries

引用

Green Energy & Environment 2022年第6期7卷 1340-1348页

作者： Changyu Yang Ning Gong Tao Chen Yang Li Wenchao Peng Fengbao Zhang Xiaobin Fan School of Chemical Engineering and Technology State Key Laboratory of Chemical EngineeringCollaborative Innovation Center of Chemical Science and EngineeringTianjin UniversityTianjin300072China

High-energy-density lithium-sulfur batteries has attracted substantial attention as competitive candidates for large-scale energy storage ***,the adverse“shuttle effect”and sluggish sulfur conversion reaction kinetics immensely obstruct their commercial ***,a two-dimensional metallic 1T phase WS_(2)(1T-WS_(2))nanosheets modified functional separator is developed to improve the electrochemical ***,the semiconducting bulk-WS_(2) crystals,and 2H phase WS_(2)(2H-WS_(2))nanosheets with more basal-plane Svacancy defects are also prepared to probe the contributions of the crystal structure(phase),S-vacancy defects,and edges to the Li–S batteries performance experimentally and *** merits of the synergistic effect of high ion and electron conductivity,enhanced binding ability to lithium polysulfides(LiPSs),and sufficient electrocatalytic active sites,the 1T-WS_(2) shows highly efficient electrocatalysis of LiPSs conversion and further improves Li–S battery *** expected,thus-fabricated cells with 1T-WS_(2) nanosheets present superior cycle stability that maintain capacity decline of 0.039%per cycle after 1000 cycles at 1.0 *** strategy presented here offers a viable approach to reveal the critical factors for LiPSs catalytic conversion,which is beneficial to developing advanced Li–S batteries with enhanced properties.

关键词： Li-S batteries Electrocatalysts Polysulfides WS_(2)

来源：评论

学校读者我要写书评

暂无评论

Construction of interfacial dynamic bonds for high performance lignin/polymer biocomposites

引用

Frontiers of chemical Science and engineering 2023年第10期17卷 1372-1388页

作者： Jianbin Mo Haixu Wang Mengzhen Yan Jianhua Huang Rui Li Danting Sun Junjie Lei Xueqing Qiu Weifeng Liu Guangdong Provincial Key Lab of Green Chemical Product Technology School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhou 510640China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China

Lignin is the largest natural aromatic biopolymer,but usually treated as industrial biomass *** development of lignin/polymer biocomposites can promote the high value utilization of lignin and the greening of ***,the weak interfacial interaction between industrial lignin and polymer induces poor compatibility and serious agglomeration in polymer owing to the strong intermolecular force of *** such,it is extremely difficult to prepare high performance lignin/polymer ***,we proposed the strategy of in situ construction of interfacial dynamic bonds in lignin/polymer *** taking advantage of the abundant oxygen-containing polar groups of lignin,we inserted dynamic bonding connection such as hydrogen bonds and coordination bonds into the interphase between lignin and the polymer matrix to improve the interfacial ***,the natural amphiphilic structure characteristics of lignin were utilized to construct the hierarchical nanophase separation structure in lignin/polymer *** persistent problems of poor dispersity and interfacial compatibility of lignin in the polymer matrix were effectively *** lignin-modified polymer composites achieved simultaneously enhanced strength and *** concise review systematically summarized the recent research progress of our group toward building high-performance lignin/polymer biocomposites through the design of interfacial dynamic bonds(hydrogen bonds,coordination bonds,and dynamic covalent bonds)between lignin and different polymer systems(polar plastics,rubber,polyurethane,hydrogels,and other polymers).Finally,the future development direction,main challenges,and potential solutions of lignin application in polymers were presented.

关键词： lignin polymer interfacial dynamic bonds

来源：评论

学校读者我要写书评

暂无评论

Copper-catalyzed and biphosphine ligand controlled3,4-boracarboxylation of 1,3-dienes with carbon dioxide

引用

Chinese chemical Letters 2025年第4期36卷 162-168页

作者： He Yao Wenhao Ji Yi Feng Chunbo Qian Chengguang Yue Yue Wang Shouying Huang Mei-Yan Wang Xinbin Ma School of Chemical Engineering and Technology Key Laboratory for Green Chemical Technology of Ministry of EducationCollaborative Innovation Center of Chemical Science and EngineeringTianjin UniversityTianjin 300072China Ningbo Key Laboratory of Green Petrochemical Carbon Emission Reduction Technology and Equipment Zhejiang Institute of Tianjin UniversityNingbo 315200China

A strategy for copper-catalyzed and biphosphine ligand controlled boracarboxylation of 1,3-dienes and CO_(2) with 3,4-selectivity was *** Cu Cl coupled with DPPF(1,1-bis(diphenylphosphino)ferrocene)was assigned to be the best catalyst,with 84%yield and exclusive3,*** ligand effect on both catalytic activity and regioselectivity of boracarboxylation was disclosed,which is rarely reported in any copper catalyzed *** borocupration process is revealed to be a vital step for the biphosphine participated boracarboxylation of 1,3-dienes with CO_(2).The minimal substrate distortion occurring in 3,4-borocupration favors the 3,4-regioselectivity of ***“pocket”confinement and suitableβ_(n)(92°–106°)of bisphosphine ligands are demonstrated to be in favour of the interaction between LCu-Bpin complex(the catalytic precursor)and1,3-diene substrate to decrease their interaction energyΔE_(int)(ζ)in 3,4-borocupration,thus promoting the 3,4-boracarboxylation.

关键词： Carbon dioxide Ligand effect Carboxylation β γ-Unsaturated carboxylic acid DFT calculation

来源：评论

学校读者我要写书评

暂无评论

Biodegradation:the best solution to the world problem of discarded polymers

引用

Bioresources and Bioprocessing 2024年第1期11卷 1047-1062页

作者： Jun Wu Jia Wang Yicheng Zeng Xinxiao Sun Qipeng Yuan Ling Liu Xiaolin Shen State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China

The widespread use of polymers has made our lives increasingly convenient by offering a more convenient and dependable ***,the challenge of efficiently decomposing these materials has resulted in a surge of polymer waste,posing environment and health ***,landfill and incineration treatment approaches have notable shortcomings,prompting a shift towards more eco-friendly and sustainable biodegradation *** primarily relies on microorganisms,with research focusing on both solitary bacterial strain and multi-strain communities for polymer ***,directed evolution and rational design of enzyme have significantly contributed to the polymer biodegradation ***,previous reviews often undervaluing the role of multi-strain *** this review,we assess the current state of these three significant fields of research,provide practical solutions to issues with polymer biodegradation,and outline potential future directions for the ***,biodegradation,whether facilitated by single bacteria,multi-strain communities,or engineered enzymes,now represents the most effective method for managing waste polymers.

关键词： Biodegradation Polymers Single-strain degradation Multi-strain degradation Enzyme engineering

来源：评论

学校读者我要写书评

暂无评论

Auxiliary ligand-induced assembly of atomically precise silver clusters

引用

Science China Chemistry 2025年第2期68卷 580-589页

作者： Yeqin Feng Xuemeng Jing Fangyu Fu Mengyun Zhao Manzhou Chi Hongjin Lv Guo-Yu Yang MOE Key Laboratory of Cluster Science Beijing Key Laboratory of Photoelectroic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 102488China

Establishing the correlation between inter-cluster assembly and auxiliary ligands at the atomic level is crucial for the development of metal cluster *** this work,we report the successful preparation and characterization of three Ag clusters,discrete 0-D Ag_(51)S_(6)Cl_(3)(i PrS)_(21)(TsO)_(15)CH_(3)CN(0-D Ag_(51),i PrS–=isopropanethiolate,TsO–=toluenesulfonate),1-D{Ag_(38)S_(4)-(i PrS)_(18)(PhCOO)_(12)}n(1-D Ag_(38),PHCOO–=benzoate),and 2-D{Ag_(2)0(SO_(4))Cl_(2)(i PrS)10(NO_(3))6}n(2-D Ag_(20)),using a delicate auxiliary-ligand-induced *** analyses reveal that the types of auxiliary ligands can readily affect the structure and dimensionality of resulting Ag *** addition of different surface auxiliary ligands from TsO–to PhCOO–and then to NO_(3)–leads to the formation of 0-D Ag_(51) to 1-D Ag_(38) and then to 2-D Ag_(2)0 clusters under otherwise identical reaction conditions,*** resulting Ag clusters exhibited structure-related optical/luminescence properties and distinct bathochromic shifts as revealed by the temperature-dependent luminescence and single-crystal X-ray diffraction studies.

关键词： silver(I)clusters auxiliary ligand effect silver cluster synthesis luminescence

来源：评论

学校读者我要写书评

暂无评论

Synergistic BrΦnsted/Lewis acid catalyzed atroposelective synthesis of aryl-β-naphthol

引用

Chinese chemical Letters 2025年第1期36卷 293-298页

作者： Jiajun Lu Zhehui Liao Tongxiang Cao Shifa Zhu Key Laboratory of Functional Molecular Engineering of Guang-dong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China School of Chemistry and Chemical Engineering Zhejiang Sci-Tech UniversityHangzhou 310018China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China

Axially chiral binaphthol have achieved great success in asymmetric *** toα-binaphthol,axially chiral aryl-β-naphthol are far less ***,we report a method of asymmetric catalysis to constructβ-naphthol with up to 99%yield,95.5:4.5 enantiomeric ratio,using alkynyl esters as precursors and chiral phosphonic acid(CPA)/Lewis acid as *** steps involve oxygen transfer and de novo arene formation to set up the chiral ***,this methodology provides a versatile platform for structurally divergent synthesis of atroposelectiveβ-naphthol analogs,which are widely found in bioactive molecules and asymmetric catalysts.

关键词： Synergistic catalysis Atropisomerism Aryl-β-naphthol Enantioselectivity Tandem reaction

来源：评论

学校读者我要写书评

暂无评论

Radial basis function neural network and overlay sampling uniform design toward polylactic acid molecular weight prediction

引用

Chinese Journal of chemical engineering 2024年第11期75卷 214-221页

作者： Jiawei Wu Zhihong Chen Zhongwen Si Xiaoling Lou Junxian Yun State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology College of Chemical EngineeringZhejiang University of TechnologyHangzhou 310032China

Polylactic acid(PLA)is a potential polymer material used as a substitute for traditional plastics,and the accurate molecular weight distribution range of PLA is strictly required in practical ***,exploring the relationship between synthetic conditions and PLA molecular weight is crucially *** this work,direct polycondensation combined with overlay sampling uniform design(OSUD)was applied to synthesize the low molecular weight *** a multiple regression model and two artificial neural network models on PLA molecular weight versus reaction temperature,reaction time,and catalyst dosage were developed for PLA molecular weight *** characterization results indicated that the low molecular weight PLA was efficiently synthesized under this ***,the experimental dataset acquired from OSUD successfully established three predictive models for PLA molecular *** them,both artificial neural network models had significantly better predictive performance than the regression ***,the radial basis function neural network model had the best predictive accuracy with only 11.9%of mean relative error on the validation dataset,which improved by 67.7%compared with the traditional multiple regression *** work successfully predicted PLA molecular weight in a direct polycondensation process using artificial neural network models combined with OSUD,which provided guidance for the future implementation of molecular weight-controlled polymer's synthesis.

关键词： Polylactic acid Molecular weight prediction Overlay sampling uniform design Neural network model

来源：评论

学校读者我要写书评

暂无评论

Simple substituents make big differences in photophysical performances of 2,1,3-benzothiadizole-conjugated spiropyrans

引用

Chinese Journal of chemical engineering 2024年第8期72卷 53-59页

作者： Xiaoming Zhu Yunting Liu Mingyue Cao Guangle Niu State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 100081China

Developing multifunctional spiropyran dyes is of particular importance in diverse *** the present study,we synthesized two 2,1,3-benzothiadiazole-conjugated spiropyrans(BT-SP-NO2and BTSP-NMe2)with distinct *** donor-acceptor-structured spiropyrans exhibited typical twisted intramolecular charge transfer features and strong emissions in low-polarity solvents with fluorescence quantum yields(QYs)of up to 90.7%.Like traditional spiropyrans,the electron-acceptor-substituted BT-SP-NO2exhibited excellent photochromic behavior under multiple alternating UV—Vis irradiation,while the electron-donor-substituted BT-SP-NMe2was an acidochromic *** addition,the substituent groups distinctly affected the packing modes of these spiropyrans in the solid ***-NMe2showed a much stronger solid-state emission(QY of 59.0%)than ***,these two dyes were utilized as biocompatible probes for the specific light-up imaging of lipid droplets.

关键词： Spiropyran 2,1,3-Benzothiadiazole Photochromism Fluorescent dye Fluorescence imaging

来源：评论

学校读者我要写书评

暂无评论

Bubble size modeling approach for the simulation of bubble columns

引用

Chinese Journal of chemical engineering 2023年第1期53卷 194-200页

作者： Xibao Zhang Zhenghong Luo Department of Chemical Engineering School of Chemistry and Chemical EngineeringState Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China

The constant bubble size modeling approach(CBSM)and variable bubble size modeling approach(VBSM)are frequently employed in Eulerian–Eulerian simulation of bubble ***,the accuracy of CBSM is limited while the computational efficiency of VBSM needs to be *** work aims to develop method for bubble size modeling which has high computational efficiency and accuracy in the simulation of bubble *** distribution of bubble sizes is represented by a series of discrete points,and the percentage of bubbles with various sizes at gas inlet is determined by the results of computational fluid dynamics(CFD)–population balance model(PBM)simulations,whereas the influence of bubble coalescence and breakup is *** simulated results of a 0.15 m diameter bubble column suggest that the developed method has high computational speed and can achieve similar accuracy as CFD–PBM ***,the convergence issues caused by solving population balance equations are addressed.

关键词： Bubble column Bubble size modeling Numerical simulation Population balance equations Computational efficiency

来源：评论

学校读者我要写书评

暂无评论

Ru(Ⅱ)-Catalyzed Selective C-H Alkynylation of Isoquinolones,Quinazolones and Phthalazinones with Bromoalkynes

引用

Chinese Journal of Chemistry 2024年第15期42卷 1686-1690页

作者： Quan-Jian Luo Han-Chi Wang Jing Zhang Jin-Heng Li Bo Sun State Key Laboratory Base of Eco-Chemical Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdaoShandong 266042China State Key Laboratory of Applied Organic Chemistry Lanzhou UniversityLanzhouGansu 730000China School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiangHenan 453007China

A new,selective Ru(Ⅱ)-catalyzed alkynylation reaction of isoquinolones,quinazolones and phthalazinones with readily available bromoalkynes has been *** reaction enables the selective construction of a new C(sp^(2))-C(sp)bond through C-H activation and C-Br functionalization,and offers an effective and selective route to synthesizing highly valuable alkynylated isoquinolone,quinazolone and phthalazinonederivatives with a wide substrate scope and highselectivity.

关键词： Ru(Ⅱ) Alkynylation Isoquinolones Bromoalkynes Heterocyclic compounds C-H activation C-C coupling Synthetic methods

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：