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Activation methods and underlying performance boosting mechanisms within fuel cell catalyst layer

eScience 2024年第6期4卷 22-44页

作者： Miao Ma Lixiao Shen Zigang Zhao Pan Guo Jing Liu Bin Xu Ziyu Zhang Yunlong Zhang Lei Zhao Zhenbo Wang MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Space Power-SourcesSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Shenzhen Key Laboratory of Special Functional Materials Shenzhen Engineering Laboratory for Advance Technology of CeramicsGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education Department of Materials Science and EngineeringHarbin Engineering UniversityHarbin 150001China Unipower Hydrogen Technology(Jiangsu)Corporation No.625Wujin East AvenueWujin DistrictChangzhou 213176China

Proton exchange membrane fuel cells(PEMFCs)have been widely acknowledged as a significant advancement in achieving sustainable energy ***,the activation of newly established Pt-ionomer interfaces in the catalyst layer of PEMFCs can be a time-consuming and costly process to ensure proper coupling and *** order to gain valuable insights into this crucial activation process,we have conducted a comprehensive analysis and comparison of the commonly employed on-line(such as current or voltage control activation,short-circuiting activation,and air interruption activation)and off-line(including boiling or steaming,acidtreatment,and ultrasonic-treatment)activation *** findings shed light on the underlying mechanisms that contribute to enhanced performance within the catalyst layer,such as the reduction of Pt oxides and hydroxides,improved proton transport,and the reduction of“dead”***,this review emphasizes the significant challenges and future opportunities that lie in further enhancing the performance within the catalyst layer through the activation process.

关键词： Activation methods Pt,Pt-alloy,and Pt-free catalysts Pt-ionomer interface Proton exchange membrane fuel cells

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Plasmon-enhanced self-powered GaN/ZnTe core/shell nanopillar array photodetector

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Nano research 2024年第6期17卷 5569-5577页

作者： Jianqi Dong Dongqi Zhang Yi Ma Daotong You Jinping Chen Bin Liu Xingfu Wang Zengliang Shi Chunxiang Xu State Key Laboratory of Digital Medical Engineering School of Biological Science and Medical EngineeringSoutheast UniversityNanjing 210096China Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials National Laboratory of Solid State MicrostructuresSchool of Electronic Science and EngineeringNanjing UniversityNanjing 210093China Institute of Photonics Technology Jinan UniversityGuangzhou 510632China Guangdong Engineering Research Center of Optoelectronic Functional Materials and Devices Institute of SemiconductorsSouth China Normal UniversityGuangzhou 510631China

Nanostructure photodetectors,as the core component of optoelectronic devices,are mainly focused on the precise preparation of mixed-component nano-heterostructures and the realization of zero power consumption ***,we successfully fabricated n-GaN/p-ZnTe core/shell nanopillar array and realized self-power ultraviolet/violet *** radial heterojunction nanodevice reveals high light-dark current ratio of 104 at 0 V bias,indicating effective carriers’*** more,by integrating plasmonic effect,the responsivity and detectivity of the Au nanoparticles decorated device are increased from 3.85 to 148.83 mA/W and 4.45×1011 to 2.33×1012 Jones under 325 nm UV light *** the rise and the fall time are decreased 1.3 times and 6.8 times under 520 nm visible light irradiation at 0 V *** high photocurrent gain is derived from that the oscillating high-energy hot electrons in Au nanoparticles spontaneously inject into the ZnTe conduction band to involve the photodetection *** work presents an effective route to prepare high-performance self-power photodetector and provides a promising blueprint to realize different functional photoelectronic devices based on core/shell nanostructure.

关键词： GaN/ZnTe core/shell nanopillar array self-power ultraviolet/visible photodetector plasmonic effect

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Unraveling the transepithelial absorption of novel dark blue pigment from Vaccinium bracteatum *** on the Caco-2 intestinal cell

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Food Science and Human Wellness 2025年第3期14卷 958-967页

作者： Mingcong Fan Weijia Lian Wenjun Yao Tingting Li Jiajia Zhao Qiang Li Yanming Guan Yan Li Haifeng Qian Zhiming Rao Li Wang School of Food Science and Technology State Key Laboratory of Food Science and TechnologyNational Engineering Research Center for Functional FoodJiangnan UniversityWuxi 214122China Department of Food Science and Engineering College of Light Industry and Food EngineeringNanjing Forestry UniversityNanjing 210037China College of Cooking Science and Technology Jiangsu College of TourismYangzhou 225000China China National Institute of Standardization Beijing 100089China China National Research Institute of Food and Fermentation Industries Co. Ltd.Beijing 100015China School of Biotechnology Jiangnan UniversityWuxi 214122China

The dark blue pigment(DBP)is a health ingredient from Vaccinium bracteatum *** used as a functional food ***,the details of transepithelial absorption on the intestinal epithelial cells are barely *** study aimed to clarify the absorption properties of DBP in the Caco-2 cell monolayer model and evaluate the effect on the endo-metabolism and barrier function of Caco-2 *** results showed that the DBP did not show the dose-dependent toxic effect to Caco-2 cells between 0.25 and 1.5 mg/mL,which did not cause disorder in the normal cell metabolism and absorption *** Caco-2 cell monolayer model could absorb DBP by passive and active transport,and the absorptive pattern was dosedependent when the concentration was more than 0.25 mg/*** DBP absorption,an increase in m RNA and protein expressions of glucose transporters demonstrated that the glucose transporters were the potential transporter of *** the glucose transport amounts were significantly lowered after 30 min of DBP treatment,indicating that DBP owned the inhibitory effect on glucose ***,DBP also owned protective effects on the barrier function of intestinal epithelial cells.

关键词： Vaccinium bracteatum Thunb.leaf Dark blue pigment Intestinal epithelial cell Transepithelial absorption Epithelial cell barrier

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Materials and device engineering to achieve high-performance quantum dots light emitting diodes for display applications

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Chinese Physics B 2023年第12期32卷 1-13页

作者：韩长峰钱若曦向超宇钱磊 Laboratory of Advanced Nano-Optoelectronic Materials and Devices Qianwan Institute of CNITECHNingbo 315300China Division of Functional Materials and Nanodevices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Jiangsu JITRI Molecular Engineering Inst.Co. Ltd.Changshu 215500China Shenzhen Research Institute Beijing Institute of Technology Shenzhen 518057China

Quantum dots(QDs)have attracted wide attention from academia and industry because of their advantages such as high emitting efficiency,narrow half-peak width,and continuously adjustable emitting *** light emitting diodes(QLEDs)are expected to become the next generation commercial display *** paper reviews the progress of QLED from physical mechanism,materials,to device *** strategies to improve QLED performance from the perspectives of quantum dot materials and device structures are summarized.

关键词： quantum dots light emitting diodes device engineering

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Effect of bacteriocin-producing Pediococcus acidilactici strains on the immune system and intestinal flora of normal mice

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Food Science and Human Wellness 2022年第2期11卷 238-246页

作者： Yiteng Qiao Zhichang Qiu Fengwei Tian Leilei Yu Jianxin Zhao Hao Zhang Qixiao Zhai Wei Chen State Key Laboratory of Food Science and Technology Jiangnan UniversityWuxiJiangsu 214122China School of Food Science and Technology Jiangnan UniversityWuxiJiangsu 214122China College of Food Science and Engineering Shandong Agricultural UniversityTai’anShandong 271018China National Engineering Research Center for Functional Food Jiangnan UniversityWuxiJiangsu 214122China Wuxi Translational Medicine Research Center Jiangsu Translational MedicineResearch Institute Wuxi BranchWuxiChina

This study was performed to determine the effects of bacteriocin-producing and non-bacteriocin-producing Pediococcus acidilactici strains on the immune system and intestinal flora of normal *** *** strains with antibacterial activity(*** CCFM28 and CCFM18)were obtained based on the inhibition-zone *** produced components were identified as bacteriocins through protease treatment,pH adjustment and hydrogen peroxide ***-producing and non-bacteriocin-producing *** strains(*** CCFM28,CCFM18 and NT17-3)caused significant changes in serum immune factors and intestinal flora of normal *** 14 days of intervention,the relative abundance of Firmicutes was significantly decreased,but that of Proteobacteria was significantly increased at the phylum *** the genus level,the administration of three *** strains resulted in the downregulation of Blautia and the upregulation of Ruminococcus and ***,there were also different regulations on some probiotic strains,such as Bifidobacterium,Coprococcus and Akkermansia,which were closely related to the antibacterial ability of the bacteriocin and the type of *** results indicated that the intervention of different *** strains could differently change the structure of intestinal flora in normal mice,which provided theoretical guidance for the selective use of bacteriocin-producing strains for health regulation in the future.

关键词： Pediococcus acidilactici Bacteriocin Immune system Intestinal flora Regulation

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Vertically grown MoS_(2)nanosheets on graphene with defect-rich structure for efficient sodium storage

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Rare Metals 2024年第3期43卷 1062-1071页

作者： Ying Wang Jia-Peng He Han-Qing Pan Qing-Peng Wang Lei Zhang Yong-Chang Liu Qing-Hong Wang School of Chemistry&Materials Science Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional MaterialsJiangsu Normal UniversityXuzhou221116China Institute of Biopharmaceutical Research Liaocheng UniversityLiaocheng252059China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyState Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing100083China Centre for Catalysis and Clean Energy Gold Coast CampusGriffith UniversityGold CoastQLD4222Australia

The synthesis of a perpendicular growth structure of MoS_(2)nanosheets on graphene for efficient sodium storage is challenging yet ideal due to the benefits of open ion diffusion channels and high electronic *** this study,we have successfully fabricated a novel structure of vertical MoS_(2)nanosheets on graphene,with ZnS nanoparticles serving as bonding points(MoS_(2)/ZnS/G),through a facile hydrothermal *** the synthesis process,Zn^(2+)not only acts as a landing site for the vertical growth of MoS_(2)nanosheets but also triggers the formation of a defect-rich structure in the final *** unique architecture of MoS_(2)/ZnS/G effectively combines the advantages of a vertically aligned geometry and a defectrich structure for energy *** resulting structure displays shortened transport paths for electrons/ions,enhanced conductivity,improved structural integrity,and an increased number of active sites for promising electrochemical *** expected,when used as anode for sodium-ion batteries,the as-synthesize d MoS_(2)/ZnS/G exhibits excellent rate capability(high capacity of 298 mAh·g^(-1)at 5 A·g^(-1))and good cycling stability(a capacity decay of 0.056%per cycle after 500 cycles at 1 A·g^(-1)).According to the kinetic investigations,the electrochemical process of the MoS_(2)/ZnS/G sample is primarily governe d by a pseudocapacitive behavior,which enhances the charge/discharge kinetics and allows the MoS_(2)/ZnS/G structure to remain intact during cycling.

关键词： MoS_(2) Perpendicular growth Graphene Sodium storage Electrochemical performance

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Preparation,structure and stability of protein-pterostilbene nanocomplexes coated by soybean polysaccharide and maltodextrin

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Food Bioscience 2022年第5期49卷 662-669页

作者： Ling Zhu Fan Yang Dongze Li Gangcheng Wu Hui Zhang School of Food Science and Technology Jiangnan UniversityWuxi214122China National Engineering Research Center for Functional Food Jiangnan UniversityChina Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province China

Pterostilbene(PTS)has received considerable attention in recent years because of its beneficial effects on health;however,its poor solubility hinders its application in the food *** study aimed to prepare and characterise three types of proteins(whey protein isolate(WPI),soybean protein isolate(SPI),and flaxseed protein isolate(FPI))conjugates of PTS,which could improve its solubility and *** results showed that the spherical particles of the protein-based nano-complexes were dissociated and *** bound to PTS mainly through hydrophobic interactions and hydrogen bonding,and PTS in proteins existed in an amorphous *** conferred PTS with better thermal stability than WPI and *** coating of FPI-PTS with soybean polysaccharide and maltodextrin yielded a more stable nanocomplex *** prepared nanocomplex powder exhibited better thermal,illumination,and storage stabilities than *** study provides guidelines for the potential application of protein-based nano-complexes in functional foods.

关键词： Proteins Pterostibene Nanocomplex structure Coating Stability

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Integration of Bio-Enzyme-Treated Super-Wood and AIE-Based Nonwoven Fabric for Efficient Evaporating the Wastewater with High Concentration of Ammonia Nitrogen

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Nano-Micro Letters 2025年第08期 9-24页

作者： Qian Ding Bingqi Jin Yinxia Zheng Huiru Zhao Jun Wang Haoxuan Li Dong Wang Ben Zhong Tang Engineering Research Center of Technical Textiles Ministry of EducationCollege of Materials Science and EngineeringDonghua University State Key Laboratory of Pollution Control and Resources Reuse School of Environmental Science and EngineeringTongji University Nonwoven Technology Laboratory College of Textile Science and EngineeringJiangnan University Centre for AIE Research Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Material Science and EngineeringShenzhen University School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen (CUHK-Shenzhen)

The treatment of ammonia nitrogen wastewater（ANW） has garnered significant attention due to the ecology, and even biology is under increasing threat from over discharge ANW. Conventional ANW treatment methods often encounter challenges such as complex processes, high costs and secondary pollution. Considerable progress has been made in employing solar-induced evaporators for wastewater treatment. However, there remain notable barriers to transitioning from fundamental research to practical applications, including insufficient evaporation rates and inadequate resistance to biofouling. Herein, we propose a novel evaporator, which comprises a bio-enzyme-treated wood aerogel that serves as water pumping and storage layer, a cost-effective multi-walled carbon nanotubes coated hydrophobic/hydrophilic fibrous nonwoven mat functioning as photothermal evaporation layer,and aggregation-induced emission（AIE） molecules incorporated as anti-biofouling agent. The resultant bioinspired evaporator demonstrates a high evaporation rate of 12.83 kg m-2h-1when treating simulated ANW containing 30 wt% NH4Cl under 1.0 sun of illumination. AIE-doped evaporator exhibits remarkable photodynamic antibacterial activity against mildew and bacteria, ensuring outstanding resistance to biofouling over extended periods of wastewater treatment. When enhanced by natural wind under 1.0 sun irradiation, the evaporator achieves an impressive evaporation rate exceeding 20 kg m-2h-1. This advancement represents a promising and viable approach for the effective removal of ammonia nitrogen wastewater.

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Highly crystalline core dominated the catalytic performance of carbon dot for cyclohexane to adipic acid reaction

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Nano research 2022年第8期15卷 7662-7669页

作者： Xiao Wang Wenyi Bian Tianyang Zhang Yajie Zhao Mingwang Shao Haiping Lin Yang Liu Hui Huang Zhenhui Kang Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Macao Institute of Materials Science and Engineering(MIMSE) MUST-SUDA Joint Research Center for Advanced Functional MaterialsMacao University of Science and TechnologyTaipa 999078MacaoChina School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710062China

Carbon dots(CDs)have uniquely structural,physicochemical and photochemical properties,suggesting a promising platform for catalysis *** in-depth understanding of the structure-activity relationship in the CDs-based catalyst system needs to know the effect of the crystalline core on their catalytic *** efficient catalytic oxidation of cyclohexane is an urgent challenge in current chemical industry,in which,adipic acid(AA)plays an important role in industry for synthesis of nylon6 and ***,we fabricated the pristine CDs by electrochemical etching graphite rod method and derived CDs with high crystalline core(CD-600,CD-800,and CD-1100)through a thermal treatment method in tube ***,these CDs performed an outstanding catalytic performance for one-step synthesis of AA from *** the help of machine learning(ML),the deep correlations between features(structures of CDs,catalytic conditions)and catalytic performances were investigated by XGBoost(XGB)*** under the optimization and prediction of XGB,it was found that high crystalline core preceded the other features and CD-1100 could get the best conversion of 30.696%and selectivity to AA of 92.52%at reaction conditions of 130℃,1.5 MPa,and 10 *** work pioneered the application of ML in industrial issues and demonstrated a comprehensive understanding on CDs as catalyst to realize one-step synthesis of AA.

关键词： adipic acid carbon dots machine learning catalytic performances crystalline core

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Interface terminal group regulated organic phototransistors with tunable persistent and switchable photoconductivity

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Science China Chemistry 2022年第12期65卷 2567-2575页

作者： Di Xue Yingying Zhang Weijie Gong Yao Yin Zi Wang Lizhen Huang Lifeng Chi Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China Gusu Laboratory of Materials Suzhou215123China Macao Institute of Materials Science and Engineering(MIMSE) MUST-SUDA Joint Research Center for Advanced Functional MaterialsMacao University of Science and TechnologyTaipaMacao999078China

With both light detection and intrinsic amplification functions,organic phototransistors have demonstrated promising applications,including photodetection and *** achieve excellent photoresponse and superior photogain,a common and effective strategy is to modulate the trapping effect with the purpose of reducing recombination or prolonging the lifetime of the photogenerated charge ***,introducing trapping sites delicately is challenging and might sacrifice the response rate together with a typical persistent ***,we demonstrate a facile strategy for achieving high photo-responsive organic phototransistors with both persistent and switchable photoconductivity features via interface terminal group *** varying the terminate groups of self-assembled monolayer(SAMs)from the strong electron withdrawing group-F,neutral−CH_(3) to electron donating−NH_(2) on the dielectric surface,we realize both minority carrier trapping and majority carrier trapping in the organic phototransistor based on the C8-BTBT active *** electron withdrawing effect of F significantly enhances the minority carrier trapping process and yields a high photoresponsivity with a long-lasting persistent *** contrast,the electron donating group−NH_(2) with a distinct majority carrier trapping ability causes switchable photoconductivity so that the photocurrent can rise pronouncedly and fully decay along with light on/***,both cases can deliver high performance with photoresponsivities higher than 104 A W^(−1) together with a photosensitivity in the level of 107 and a detectivity of approximately 10^(15)–10^(16) *** a tunable,excellent photoresponse property enables the convenient exploration of organic phototransistors to satisfy different application requirements.

关键词： organic phototransistor surface modification trapping persistent photoconductivity

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