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Hierarchically porous Co@N-doped carbon fiber assembled by MOF-derived hollow polyhedrons enables effective electronic/mass transport:An advanced 1D oxygen reduction catalyst for Zn-air battery

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Journal of Energy Chemistry 2023年第1期76卷 117-126,I0004页

作者： Yifei Zhang Quanfeng He Zihao Chen Yuqing Chi Junwei Sun Ding Yuan Lixue Zhang Industrial Research Institute of Nonwovens&Technical textiles College of Textiles&ClothingQingdao UniversityQingdao 266071ShandongChina College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071ShandongChina College of Chemistry and Chemical Engineering Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM)Xiamen UniversityXiamen 361005FujianChina

Developing advanced oxygen reduction reaction(ORR)electrocatalysts with rapid mass/electron transport as well as conducting relevant kinetics investigations is essential for energy technologies,but both still face ongoing ***,a facile approach was reported for achieving the highly dispersed Co nanoparticles anchored hierarchically porous N-doped carbon fibers(Co@N-HPCFs),which were assembled by core-shell MOFs-derived hollow ***,the unique one-dimensional(1D)carbon fibers with hierarchical porosity can effectively improve the exposure of active sites and facilitate the electron transfer and mass transfer,resulting in the enhanced reaction *** a result,the ORR performance of the optimal Co@N-HPCF catalysts remarkably outperforms that of commercial Pt/C in alkaline solution,reaching a limited diffusion current density(J)of 5.85 m A cm^(-2)and a half-wave potential(E_(1/2))of 0.831 ***,the prepared Co@N-HPCF catalysts can be used as an excellent air-cathode for liquid/solid-state Zn-air batteries,exhibiting great potentiality in portable/wearable energy ***,the reaction kinetic during ORR process is deeply explored by finite element simulation,so as to intuitively grasp the kinetic control region,diffusion control region,and mixing control region of the ORR process,and accurately obtain the relevant kinetic *** work offers an effective strategy and a reliable theoretical basis for the engineering of first-class ORR electrocatalysts with fast electronic/mass transport.

关键词： Oxygen reduction catalyst Metal-organic frameworks Carbon nanofiber Hierarchically porous structure Diffusion kinetics Zn-air battery

Raman imaging-assisted customizable assembly of MOFs on cellulose aerogel

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Nano Research 2022年第3期15卷 2599-2607页

作者： Zhanhong Yuan Dingding Meng Yingzhu Wu Guangqing Tang Ping Liang John HXin Dongdong Ye School of Textile Materials and Engineering Wuyi UniversityJiangmen 529020China School of Applied Physics and Materials Wuyi UniversityJiangmen 529020China Institute of textiles&clothing The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

Because of a weak interface-bonding force between metal–organic frameworks(MOFs)and substrates and the loss of customization in structural designs owing to the lack of the regulation of ion sites,MOFs tend to escape from the constructed composite *** this study,the as-prepared 2,2,6,6-tetramethylpiperidyl-1-oxyl(TEMPO)-oxidized algae cellulose nanofibers(TACFs)were used to chelate metal ions at controllable sites and subsequently firmly entangle the assembled MOF *** distribution of ions and synthesized MOFs inside the gel was monitored using Raman imaging technology,which provided an intuitive approach for visually observing the ions and MOF *** this technology,the synthesized customizable TACFs@ZIF-67 aerogels exhibited a high specific surface area(734.7 m^(2)/g),low density(6.18 mg/cm^(3)),controlled particle distribution,good underwater structural stability,and excellent adsorption of *** study provides a way for solving the dispersion problem of MOFs in nanofibrous aerogels using Raman imaging technology–assisted microcosmic fixed-point design.

关键词： cellulose nanofiber aerogel Raman imaging ion distribution metal–organic framework

Fundamentals,On‑Going Advances and Challenges of Electrochemical Carbon Dioxide Reduction

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Electrochemical Energy Reviews 2022年第1期5卷 82-111页

作者： Zongkui Kou Xin Li Tingting Wang Yuanyuan Ma Wenjie Zang Guangdi Nie John Wang department of Materials Science and Engineering National University of SingaporeSingapore 117574Singapore Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics International Collaborative Laboratory of 2D Materials for Optoelectronics Science and TechnologyCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060GuangdongChina Industrial Research Institute of Nonwovens and Technical textiles College of Textiles and ClothingQingdao UniversityQingdao 266071ShandongChina

Electrochemical carbon dioxide reduction(ECR)is an attractive pathway to synthesize useful fuels and chemical feedstocks,especially when paired with renewable electricity as the energy *** this overview,we examine the recently witnessed advances and on-going pursuits of ECR in terms of the key fundamental mechanisms,basic experimentation principles,electrocatalysts and the electrochemical setup for ECR,aiming at offering timely key insights into solving the unsettled bottleneck *** reaction pathways are discussed in relation to the generation of single-,double-and multi-carbon products by the ECR,as well as the underlying principles in catalyst design to form them both efficiently and *** the rational design of electrocatalysis,we look into the critically important roles played by various in situ and operando experimental techniques and computational simulations,where the key priorities are to engineer the highly active and selec-tive ECR catalysts for the specifically targeted ***,with the purposely designed high activity and selectivity,one would be able to“magically”transform a bottle of CO_(2)-riched“coke drink”to a glass of“beer”with the desired alcohol product in a layman term,instead of a bottle of formic ***,there are still considerable complications and challenges *** a dynamically rapid-advancing research frontier for both energy and the environment,there are great opportunities and obstacles in the ECR scale up.

关键词： CO_(2)reduction Electrocatalysis Catalyst design Mechanism understanding Fundamental science

Bioinspired All‑Fibrous Directional Moisture‑Wicking Electronic Skins for Biomechanical Energy Harvesting and All‑Range Health Sensing

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Nano-Micro Letters 2023年第4期15卷 277-293页

作者： Chuanwei Zhi Shuo Shi Shuai Zhang Yifan Si Jieqiong Yang Shuo Meng Bin Fei Jinlian Hu department of Biomedical Engineering City University of Hong KongHong Kong S.A.R 999077China Institute of textiles and clothing The Hong Kong Polytechnic UniversityHong Kong S.A.R 999077China City university of Hong Kong Shenzhen Research Institute Shenzhen 518057People’s Republic of China

Electronic skins can monitor minute physiological signal variations in the human skins and represent the body’s state,showing an emerging trend for alternative medical diagnostics and human-machine *** this study,we designed a bioinspired directional moisture-wicking electronic skin(DMWES)based on the construction of heterogeneous fibrous membranes and the conductive MXene/CNTs electrospraying *** moisture transfer was successfully realized by surface energy gradient and push-pull effect via the design of distinct hydrophobic-hydrophilic difference,which can spontaneously absorb sweat from the *** DMWES membrane showed excellent comprehensive pressure sensing performance,high sensitivity(maximum sensitivity of 548.09 kPa^(−1)),wide linear range,rapid response and recovery *** addition,the single-electrode triboelectric nanogenerator based on the DMWES can deliver a high areal power density of 21.6μW m^(−2) and good cycling stability in high pressure energy ***,the superior pressure sensing and triboelectric performance enabled the DMWES for all-range healthcare sensing,including accurate pulse monitoring,voice recognition,and gait *** work will help to boost the development of the next-generation breathable electronic skins in the applications of AI,human-machine interaction,and soft robots.

关键词： Bioinspired Electrospinning Electronic skin Directional moisture wicking MXene

Photoinduced excimer generation in perylene diimide dimer:effects of solvent polarity[Invited]

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Chinese Optics Letters 2022年第10期20卷 49-54页

作者：冉光柳汪航宋宇菁刘亚辉薄志山张文凯 department of Physics and Applied Optics Beijing Area Major Laboratory Center for Advanced Quantum StudiesBeijing Normal UniversityBeijing 100875China College of textiles&clothing Qingdao UniversityQingdao 266071China Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China

The aggregation and photoinduced excited state dynamics of organic π-conjugated molecules play a vital role in solar energy conversion and *** work investigates how solvent polarity affects the aggregation behavior and the photophysical process of perylene diimide dimer(PDI-II).The results show that the conjugations between PDI intramolecular chromophores are more likely to generate excimer,and the conjugations between PDI intermolecular chromophores are more likely to experience symmetry-breaking charge *** study can provide a reference for the design of high-efficiency solar energy conversion materials.

关键词： excimer perylene diimide dimer solvent effect transient absorption spectroscopy

Functionalized Fiber-Based Strain Sensors:Pathway to Next-Generation Wearable Electronics

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Nano-Micro Letters 2022年第4期14卷 90-128页

作者： Zekun Liu Tianxue Zhu Junru Wang Zijian Zheng Yi Li Jiashen Li Yuekun Lai department of Materials The University of ManchesterOxford RoadManchester M139PLUK College of Chemical Engineering Fuzhou UniversityFuzhou 350116China Institute of textiles and clothing Research Institute for Intelligent Wearable SystemsResearch Institute for Smart EnergyThe Hong Kong Polytechnic UniversityHung HomHong KongSARChina

Wearable strain sensors are arousing increasing research interests in recent years on account of their potentials in motion detection,personal and public healthcare,future entertainment,man-machine interaction,artificial intelligence,and so *** research has focused on fiber-based sensors due to the appealing performance of fibers,including processing flexibility,wearing comfortability,outstanding lifetime and serviceability,low-cost and large-scale ***,we review the latest advances in functionalization and device fabrication of fiber materials toward applications in fiber-based wearable strain *** describe the approaches for preparing conductive fibers such as spinning,surface modification,and structural *** also introduce the fabrication and sensing mechanisms of state-of-the-art sensors and analyze their merits and *** applications toward motion detection,healthcare,man-machine interaction,future entertainment,and multifunctional sensing are summarized with typical *** finally critically analyze tough challenges and future remarks of fiber-based strain sensors,aiming to implement them in real applications.

关键词： Wearable strain sensor Fiber functionalization Wearability Flexible electronics Conductive materials

Electro-spinning Antimicrobial N-halamine Modified Poly(vinyl alcohol)Nanofibers

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Journal of Donghua university(English Edition) 2014年第1期31卷 44-49页

作者：姜潜远任学宏黄东时 Key Laboratory of Eco-textiles of Ministry of Education College of Textiles and ClothingJiangnan University department of Poultry Science Auburn University

Antimicrobial poly( vinyl alcohol)( PVA) nanofibrous composites were prepared by adding 3-( 2,3-dihydroxypropyl)-5,5-dimethylimidazolidine-2,4-dione( N-halamine diol) to the PVA solution using electro-spinning technique upon curing and exposure to diluted sodium hypochlorite. Scanning electron microscopy( SEM) demonstrates that PVA nanofibers formed with diameters of( 255 ±94) nm. Cross-linked PVA nanofibers with N-halamine diol precursor and 1,2,3,4-butanetetracarboxylic( BTCA) showed good water resistance. The chlorinated PVA nanofibrous mats completely inactivated Staphylococcus aureus( Gram-positive) and Escherichia coli O157: H7( Gram-negative) with 7 log reductions( the reduction of the bacterial concentration in logarithm) within 5min and 1 min of contact time,respectively.

关键词： poly(vinyl alcohol)(PVA) antimicrobial nanofiber electro-spinning N-halamine

Effect of Flats Speed on Card Sliver Quality

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Journal of Donghua university(English Edition) 2011年第1期28卷 93-95页

作者：曹继鹏孙鹏子 School of clothing & textiles Eastern Liaoning University

The effect of flats speed,especially higher flats speed,on card sliver quality was *** sliver produced at seven flats speeds was tested with Uster *** results show that over-high flats speed is not beneficial to removing impurities and neps of card *** flats speed from 450 to 550 mm/min is the best for removing impurity;while a speed of 450 or 650 mm/min is the best for removing neps of card *** 1 050 mm/min flats speed is the best for removing short ***,the flats speed of 450 mm/min is the most advantageous to improve the comprehensive quality of card *** is also found that installing back-web-cleaner is very helpful to remove *** is also favorable to reduce short fibers,thus increasing the average *** it is not helpful to reduce impurities in the sliver.

关键词：卡片公寓速度 Uster AFIS nep 杂质短纤维内容由号码意味着长度

Effect of Flat Heel-Toe Difference of a Card on Yarn Unevenness and Usual Faults

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Journal of Donghua university(English Edition) 2012年第4期29卷 336-340页

作者：曹继鹏张志丹孙鹏子 School of clothing & textiles Eastern Liaoning University

Effect of flat heel-toe difference (HTD) of a card on some parameters of yarn quality was studied by testing the yarn which was produced under different HTDs, doffer speed, and cylinder speed with yarn evenness tester of PT7000. The effect of HTD on yarn parameters was analyzed by using SPSS. The results show that HTD has significant influence on parameters of thickness fault and nep. As a whole, the HTDs of 0.42 and 0.56 mm are beneficial to improving yarn quality in comparison with the other HTDs.

关键词： heel-toe difference (HTD) cylinder speed doffer speed yarn unevenness thickness fault nep