检索结果-内蒙古大学图书馆

SSRN 2024年

作者： Wang, Wenyuan Zhao, Xinxin Yan, Lisi Yang, Feng Yang, Jing Li, Binbin Wang, Xinyu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong L aboratory Xianhu hydrogen Valley Foshan528200 China Hainan Institute Wuhan University of Technology Sanya572000 China Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan430070 China School of Foreign Languages Wuhan University of Technology Wuhan430070 China Department of Stomatology Zhongnan Hospital of Wuhan University Wuhan430060 China

In this study, low molecular weight sodium alginate was prepared by oxidizing the alginate solution with TEMPO/NaBr/NaClO and explored its potential application in tissue engineering. FTIR, UV-vis and NMR showed that the chemical structure of sodium alginate was not significantly changed by oxidation. The results of GPC and quantitative tests on carboxyl and aldehyde groups showed that the molecular weight of oxidized sodium alginate decreased gradually (2058.97, 544.39, 164.89, 94.92 kDa) with the increase of the ratio of oxidizing agent NaClO to SA (0, 0.25, 1.00, 2.00 mmol/g), and the content of carboxyl groups increased slowly (2.48, 4.27, 4.57, 4.70 mmol/g), no aldehyde group was found in the product, which was consistent with the results of XRD and TGA detection. We speculate that when the TEMPO system oxidizes the non-specific hydroxyl groups on the sugar ring of sodium alginate, it will also destroy the 1-4 glycosidic bonds between the segments, and the aldehyde group only exists as an intermediate product. In addition, preliminary in vitro biodegradation and cell compatibility tests showed that sodium alginate has better degradation properties after oxidation and exhibited a better ability to promote L929 cell proliferation under high oxidation levels and low concentrations. © 2024, The Authors. All rights reserved.

关键词： Aldehydes

来源：评论

学校读者我要写书评

暂无评论

A facile synthesis of hierarchically porous graphene for high-performance lithium storage

引用

New Journal of Chemistry 2022年第21期46卷 9999-10003页

作者： Chenming Feng Yi Lu Yixuan Liu Xiaoyu Yang Ge Tian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao) Wuhan University of Technology Wuhan China Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf Universitätsstraße 1 Düsseldorf 40225 Germany

Hierarchically porous graphene with macro-mesopores is highly desired for enhancing lithium storage. However, it is still not easy to construct such materials with hierarchical porosity. Herein, hierarchical porous graphene was successfully fabricated via two-step calcination. The as-prepared sample exhibits an excellent reversible capacity of 545 mA h g⁻¹ at 5 A g⁻¹ after 700 cycles.

关键词：

来源：评论

学校读者我要写书评

暂无评论

High-throughput data-driven interface design of high-energy-density polymer nanocomposites

引用

Journal of Materiomics 2020年第3期6卷 573-581页

作者： Zhong-Hui Shen Yang Shen Xiao-Xing Cheng Han-Xing Liu Long-Qing Chen Ce-Wen Nan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhan430070China School of Materials Science and Engineering State Key Lab of New Ceramics and Fine ProcessingTsinghua UniversityBeijing100084China Department of Materials Science and Engineering The Pennsylvania State UniversityUniversity ParkPA16802United States

Understanding the interface effect in dielectric nanocomposites is crucial to the enhancement of their *** this work,a data-driven interface design strategy based on high-throughput phase-field simulations is developed to study the interface effect and then optimize the permittivity and breakdown strength of ***,we use two microscopic features that are closely related to the macroscopic dielectric properties,the thickness and permittivity of the interface phases,to evaluate the role of interfaces in experimental configuration,and thus provide quantitative design schemes for the interfacial *** the polyvinyl difluoride(PVDF)-BaTiO_(3) nanocomposite as an example,the calculation results demonstrate that the interfacial polarization could account for up to 83.6% of the increase in the experimentally measured effective permittivity of the *** on the interface optimized strategy,a maximum enhancement of ~156% in the energy density could be achieved by introducing an interface phase with d/r=0.55 and ε_(interface)/ε_(filler)=0:036,compared to the pristine ***,the present work not only provides fundamental understanding of the interface effect in dielectric nanocomposites,but also establishes a powerful data-driven interface design framework for such materials that could also be easily generalized and applied to study interface issues in other functional nanocomposites,such as solid electrolytes and thermoelectrics.

关键词： Interface Polymer nanocomposites Energy storage Data-driven Phase-field simulation

来源：评论

学校读者我要写书评

暂无评论

Recent advances in g-CN-based heterojunction photocatalysts

引用

Journal of materials Science & technology 2020年第21期56卷 1-17页

作者： Yunfeng Li Minghua Zhou Bei Cheng Yan Shao College of Environmental and Chemical Engineering Xi’an Polytechnic UniversityXi’an710000China Hubei Key Laboratory of Wudang Local Chinese Medicine Research Hubei University of MedicineShiyan 442000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Outpatient Taihe HospitalHubei University of MedicineShiyan 442000China

Semiconductor heterojunction photocatalysts have received much concern due to their great application prospect in solar energy utilization and *** construction of heterostructure with two or more semiconductor materials can integrate the advantages of multi-components to simultaneously improve the photo-induced charges separation,extend visible light absorption range and retain the high redox ability of ***,constructing of g-C3 N4-based heterostructure has become a hot focus due to the multiple merits of g-C3 N4,such as facile synthesis,high stability,unique optical and electronic *** review tries to give a comprehensive introduction and provide the possible tendency in design and fabrication of g-C3 N4-based heterojunction photocatalysts,especially in rational synthesis of type-II heterojunction,direct Z-scheme heterojunction,new type of S-scheme heterojunction,p-n heterojunction and Schottky ***,the special charges transfer mechanisms of g-C3 N4-based heterojunctions are discussed and their potential applications in photocatalytic water splitting,photo-degradation of contaminants and photo-reduction of CO2 into fuels are also ***,we attempt to propose some crucial issues based on the current research,which should be further investigated and resolved in this interesting research area.

关键词： Photocatalysis g-C3N4 Heterojunction Z-scheme S-scheme

来源：评论

学校读者我要写书评

暂无评论

Improving the Ohmic Polarization of High-Temperature Proton Exchange Membrane Fuel Cells Using Crosslinked Polybenzimidazole Membranes Containing Acidophilic Quaternary Ammonium Groups by One-Step Strategy

SSRN

引用

SSRN 2023年

作者： Li, Jin Liu, Guoliang Zhang, Fangfang Liao, Jun Tang, Haolin Zhang, Haining State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Nr. 122 Luoshi Rd. Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan528200 China Hubei Key Laboratory of Fuel Cell Technology Wuhan University of Technology Wuhan430070 China School of Nuclear Technology and Chemistry & Biology Hubei University of Science and Technology Nr. 88 Xianning Avenue Xianning437100 China Hubei Han-Tech Co. Ltd Nr. 116 Linju Street Yuanan444200 China

Ingenious crosslinked network structure in phosphoric acid doped polybenzimidazole membranes can mitigate the mutual restriction of proton conductivity and mechanical properties. However, the complicated synthesis of tailored macromolecular crosslinker and the time-consuming post-treatment hinder their practical application as high temperature proton exchange membranes. Herein, crosslinked polybenzimidazole membranes are synthesized using small molecular crosslinker containing acidophilic quaternary ammonium groups through a one-step crosslinking strategy. After doping with phosphoric acid, the quaternary ammonium-biphosphate ion-pair coordination and the crosslinked structure result in the improved anhydrous proton conductivity, oxidation stability, and mechanical strength of the formed membranes compared to un-crosslinked sample. Membrane with the optimized degree of crosslinking exhibits an anhydrous conductivity of 72.27 mScm-1 at 160 oC with a tensile strength of 12.14 MPa. Benefiting from the crosslinked structure and the high proton conductivity, the accordingly formed membrane electrode assembly possesses a high open circuit voltage of 1.01 V and an improved Ohmic polarization, delivering a peak power density of 0.66 Wcm-2 using hydrogen as fuel and air as oxidant. © 2023, The Authors. All rights reserved.

关键词： Proton conductivity

来源：评论

学校读者我要写书评

暂无评论

Influence of Substitution of Different Transition Metal Elements (Mn, Cr, Co) on the Properties of Bi0.88sm0.12feo3-Based Ceramics

SSRN

引用

SSRN 2022年

作者： Liu, Juan Wang, Lejiang Zuo, Jianan Sun, Tu Lai Yu, Zilong Xiang, Lilin Guo, Xiangtai Xu, Dong Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials School of material science and engineering Anhui University of Technology Ma'anshan243002 China Center for Electron Microscopy State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology College of Chemical Engineering Zhejiang University of Technology Hangzhou310014 China

Transition metal elements (M=Mn, Cr, Co, Mn 0.5 Cr 0.5 , Mn 0.5 Co 0.5 , Cr 0.5 Co 0.5 ) modified Bi 0.88 Sm 0.12 FeO 3 (BSF-M) ceramics were synthesized by rapid liquid phase sintering. The effect of different transition metal elements on the structure and characteristics of BiFeO 3 -based ceramic were studied. Structural refinement revealed the coexistence of rhombohedral R3c phase, orthorhombic Pna2 1 phase and a small amount of Pbnm phase of all samples, and the element type had little effect on the phase composition. According to the XPS analysis, Co and Mn elements can be regarded as hard additives, and Cr element can be regarded as soft additives. Due to the different electronic structures of transition metal elements, different element substitutions have different effects on the electrical and magnetic properties of BiFeO 3 . The results show that the addition of Cr improved the electrical properties of BSF-based ceramics, and the best ferroelectric properties obtained in the BSF-Cr sample, where P r =18.30 μC/cm 2 . The magnetic properties of Co substituted samples are significantly improved, and the maximum remanent magnetization obtained in the BSF-Co sample, where M r =110.8 emu/mol, which may be attributed to the collinear magnetic structure induced by Co-substitution. Finally, the simultaneously enhanced ferroelectric and magnetic properties were obtained in the Cr and Co co-substituted composition BSF-Cr 0.5 Co 0.5 , where P r =10.82 μC/cm 2 , M r =73.3 emu/mol. Multiple ion substitution is a very effective method to optimize the properties of BiFeO 3 . © 2022, The Authors. All rights reserved.

关键词： Bismuth compounds

来源：评论

学校读者我要写书评

暂无评论

Extended conjugation-induced π electron redistribution for stabilizing organic anodes in aqueous ammonium ion batteries

引用

Journal of Energy Storage 2025年 130卷

作者： Xinlei Tang Haode Zhang Sensen Yu Shan Hu Wen Chen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 PR China

Organic molecules have attracted significant attention as potential anode materials for aqueous ammonium-ion batteries (AAIBs) due to their tunable structure, rich active sites, and abundant resources. However, their practical applications are hindered by structural instability and high solubility. Herein, we design an extended conjugated molecule, benzo[ a ]benzo[7,8]quinoxalino[2,3- i ]phenazine-8,17-dione (TABQ-NQ), by incorporating phenyl groups into the 5,7,12,14-tetraaza-6,13-pentacenequinone (TAPQ) structure. The strengthened intermolecular interactions arising from the extended conjugation contribute to the improved structural integrity of TABQ-NQ. Furthermore, the intramolecular charge redistribution facilitated by the extended conjugation enhances the binding affinity between TABQ-NQ and NH 4 + while reducing interactions of TABQ-NQ with H 2 O, thereby stabilizing discharge intermediates and preventing further dissolution. As a result, TABQ-NQ exhibits reduced solubility, improved stability, and superior electrochemical performance. The TABQ-NQ anode demonstrates a high initial specific capacity of 190 mAh g −1 , with a capacity of 146 mAh g −1 at 0.2 A g −1 after over 650 cycles, corresponding to the capacity retention of 76.8 %, and maintains an initial capacity of 127.5 mAh g −1 at 2 A g −1 . Ex-situ characterizations further reveal the low solubility and high redox reversibility of TABQ-NQ. This work provides new insights into the extension of conjugated structures in organic molecules and offers valuable guidance for the development of AAIBs research.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Controlling atomic phosphorous-mounting surfaces of ultrafine W_(2)C nanoislands monodispersed on the carbon frameworks for enhanced hydrogen evolution

引用

Chinese Journal of Catalysis 2021年第10期42卷 1798-1807页

作者： Xiangyong Zhang Tianying Liu Ting Guo Xueying Han Zongyun Mu Qiang Chen Jiangmin Jiang Jing Yan Jiaren Yuan Dezhi Wang Zhuangzhi Wu Zongkui Kou School of Materials Science and Engineering Central South UniversityChangsha 410083HunanChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina School of Physics and Electronic Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

Controllably mounting foreign atoms on the surfaces of earth-abundant electrocatalysts strongly improve their surface electronic properties for optimizing the catalytic performance of surficial sites to an unusual level,and provides a good platform to gain deep insights into catalytic *** present work describes,employing ultrafine W2C nanoislands(average size:2.3 nm)monodispersed on the N,P dual-doped carbon frameworks as a model system,how to regulate the atomic phosphorous-mounting effect on the surfaces of W_(2)C to derive an active and stable P-mounting W_(2)C(WCP)catalyst for both acidic and alkaline hydrogen evolution reaction(HER).Since in situ phosphorus substitution into carbon sites of preformed W_(2)C nanoislands gradually proceeds from surfaces to solids,so that using a proper amount of phosphorus sources can readily control the surface mounting level to avoid the mass P-doping into the *** this way,the activity per active site of WCP catalyst with robust stability can be optimized to 0.07 and 0.56 H_(2 )s^(-1) at-200 mV overpotential in acid and base,respectively,which reach up to the several-fold of pure-phase W_(2)C(0.01 and 0.05 H_(2) s^(-1)).Theoretical investigations suggest that compared with solid P doping,the P mounting on W_(2)C surface can more remarkably enhance its metallicity and decrease the hydrogen release *** finding disclosed a key correlation between surface foreign atom-mounting and catalytic activity,and suggested a logical extension to other earth-abundant catalysts for various catalytic reactions.

关键词： Tungsten carbide Doping Surficial engineering Hydrogen evolution reaction Electrocatalyst

来源：评论

学校读者我要写书评

暂无评论

ZnxCd1–xS quantum dot with enhanced photocatalytic H2-production performance

引用

Chinese Journal of Catalysis 2021年第1期42卷 15-24页

作者： Rongrong Gao Bei Cheng Jiajie Fan Jiaguo Yu Wingkei Ho State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina Department of Science and Environmental Studies The Education University of Hong KongHong KongChina

H2 is an important energy carrier for replacing fossil fuel in the future due to its high energy density and environmental *** a sustainable H2-generation method,photocatalytic H2 production by water splitting has attracted much ***,oil-soluble ZnxCd1-xS quantum dot(ZCS QD)with a uniform particle size distribution were prepared by a hot-injection ***,no photocatalytic H2-production activity was observed for the oil-soluble ZCS QD due to its ***,the oil-soluble ZCS QD was converted into a water-soluble ZCS QD by a ligand-exchange *** water-soluble ZCS QD exhibited excellent photocatalytic H2-production performance in the presence of glycerin and Ni^2+,with an apparent quantum efficiency of 15.9%under irradiation of 420 nm ***,the photocatalytic H2-generation activity of the ZCS QD was~10.7 times higher than that of the ZnxCd1-xS relative samples prepared by the conventional co-precipitation *** work will inspire the design and fabrication of other semiconductor QD photocatalysts because QD exhibits excellent separation efficiency for photogenerated electron-hole pairs due to its small crystallite size.

关键词： ZnxCd1-xS Solid-solution photocatalyst Photocatalytic H2 production Oil-soluble quantum dot Water-oil soluble quantum dot

来源：评论

学校读者我要写书评

暂无评论

Novel N-Alkylation Synthetic Strategy of Imidazolium Cations Grafted Polybenzimidazole for High Temperature Proton Exchange Membrane Fuel Cells

SSRN

引用

SSRN 2022年

作者： Wang, Jian Liu, Guoliang Wang, Ailian Ji, Wenxi Zhang, Longgui Zhang, Taoyi Li, Jing Zhang, Hongfei Tang, Haolin Zhang, Haining State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Nr. 122 Luoshi Rd. Wuhan430070 China Foshan Xianhu Laboratory The Advanced Energy Science and Technology Guangdong Laboratory Foshan528200 China Research Institute of Chemical Industry Co. Ltd Beijing100013 China

Development of simple synthetic strategy of polybenzimidazole-based membranes with high uptake and retention ability of phosphoric acid is essential for long-term practical applications of high temperature proton exchange membrane fuel cells. In this work, N, N-dimethylacetamide is used as both deacid reagent and solvent for N-alkylation reaction to form imidazolium cations-grafted polybenzimidazole. The accordingly formed membranes exhibit an improved uptake and retention ability of phosphoric acid compared to pristine polybenzimidazole membrane. The optmized membrane with 60% of grafting degree has an acid uptake of 361.2 wt% with an anhydrous proton conductivity of 75.2 mS cm-1 at 160 oC, about 4.2 times higher than that of pristine polybenzimidazole membrane. After the acid retention test at 160 oC for 240 h, proton conductivity of the optimized membrane decreases by 7.5%, lower than that for pristine polybenzimidazole membrane under the same conditions (11.9% loss). The thus-assembled single cell delivers the power density of 0.430, 0.599 and 0.712 W cm-2 under 0, 100 and 200 kPa back pressures whereas the values are 0.321, 0.428 and 0.512 W cm-2 for the cell assembled from phosphoric acid-doped pristine polybenzimidazole membrane. © 2022, The Authors. All rights reserved.

关键词： Membranes

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：