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Highly crystalline and water-wettable benzobisthiazole-based covalent organic frameworks for enhanced photocatalytic hydrogen production

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National Science Review 2023年第1期10卷 268-276页

作者： Wei Huang Yongpan Hu Zhengyuan Qin Yujin ji xuan Zhao Yunling Wu Qing He Youyong li Chunfeng Zhang Jun Lu Yanguang li Institute of Functional Nano and Soft Materials(FUNSOM) Soochow University jiangsu Key Laboratory for Advanced Negative Carbon Technologies Soochow University National Laboratory of Solid State Microstructures School of Physics and Collaborative Innovation Center for Advanced MicrostructuresNanjing University Macao Institute of Materials Science and Engineering (MIMSE) MUST-SUDA Joint Research Center for Advanced Functional Materials Macau University of Science and Technology College of Chemical and Biological Engineering Zhejiang University

Two-dimensional covalent organic frameworks are promising for photocatalysis by virtue of their structural and functional diversity,but generally suffer from low activities relative to their inorganic *** fulfill their full potential re quires a rational tailoring of their structures at different scales as well as their surface ***,we demonstrate benzobisthiazole-based covalent organic frameworks as a superior photocatalyst for hydrogen *** product features high crystallinity with ordered 2.5-nm-wide cylindrical mesopores and great water *** structural advantages afford our polymeric photo catalyst with fast charge carrier dynamics as evidenced by a range of spectroscopic characterizations and excellent catalytic performances when suspended in solution or supported on melamine *** visible-light irradiation,it enables efficient and stable hydrogen evolution with a production rate of 487 μmol h-1(or a mass-specific rate of 48.7 mmol g-1h-1)—far superior to the previous state of the *** also demonstrate that hydrogen production can be stoichiometrically coupled with the oxidation conversion of biomass as exemplified by the conversion of furfuryl alcohol to 2-furaldehyde.

关键词： covalent organic frameworks photocatalysis hydrogen evolution benzobisthiazole water-wettable

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Silk nanofibril as nanobinder for preparing COF nanosheet-based proton exchange membrane

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Green Energy & Environment 2023年第3期8卷 915-926页

作者： Ping li Ningxin Zhang xuan li Shaokun Tang School of Chemical Engineering&Technology Tianjin UniversityTianjinChina Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin UniversityTianjinChina

Two-dimensional covalent organic framework nanosheets(CONs)with ultrathin thickness and porous crystalline nature show substantial potential as novel membrane ***,bringing CONs materials into flexible membrane form is a monumental challenge due to the limitation of weak interactions among ***,one-dimensional silk nanofibrils(SNFs)from silkworm cocoon are designed as the nanobinder to link sulfonated CON(SCON)into robust SCON-based membrane through vacuum-filtration *** and large lateral-sized SCONs are synthesized via bottom-up interface-confined synthesis *** from high length-diameter ratio of SNF and rich functional groups in both SNF and SCON,two-dimensional(2D)SCONs are effectively connected together by physical entanglement and strong H-bond *** resultant SCON/SNF membrane displays dense structure,high mechanical integrity and good ***,the rigid porous nanochannels of SCON,high-concentration-SO3H groups insides the pores and H-bonds at SCON-SNF interfaces impart SCON/SNF membrane high-rate proton transfer ***,a superior proton conductivity of 365 mS cm^(-1)is achieved at 80C and 100%RH by SCON/SNF *** work offers a promising approach for connecting 2D CON materials into flexible membrane as high-performance solid electrolyte for hydrogen fuel cell and may be applied in membrane-related other fields.

关键词： Covalent organic framework nanosheet Silk nanofibril Membrane Proton conductivity Fuel cell

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Homologous CoS2 interface with directed electron transfer and strong chloridion repulsion for efficient seawater oxidation

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Science China Chemistry 2025年

作者： Yuan Tian jiang-Bo Chen jie Ying Ge Tian Yu-xuan Xiao Yi Lu Si-Ming Wu Wei Geng ling Shen Xiao-Yu Yang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering and Shenzhen Research Institute & Laoshan Laboratory Wuhan University of Technology School of Chemical Engineering and Technology Sun Yat-Sen University National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu Laboratory

Seawater electrolysis is a highly promising method to produce high energy density hydrogen,especially in dry areas that have scarce freshwater ***,application of seawater electrolysis is confronted by two major problems associated with catalysts employed for the anodic oxygen evolution reaction （OER） including the competitive hypochlorite evolution reaction（HCER） and strong chloridion （Cl–） triggered *** studies aimed at overcoming these problems,a facile method has been developed to synthesize a homologous CoS2heterojunction as an OER *** to a difference in work functions at the interface and increased electron density,this material has directed electron transfer and strong chloridion repulsion properties,*** have shown that CoS2achieves low overpotentials of 289 and 322 mV at 10 mA cm-2current density in respective alkaline （1 M KOH） and alkaline simulated seawater ***,the outstanding stability of CoS2is reflected in a negligible decline in activity during promotion of the OER for 100 *** of density functional theory calculations reveal that the homologous CoS2heterojunction promotes directed electron transport for optimizing adsorption/desorption of reactive species and heightens the Cl-adsorption energy for strongly repulsing Cl-,phenomena that enhance OER performance in alkaline simulated seawater.

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Modes of grain growth and mechanism of dislocation reaction under applied biaxial strain:Atomistic and continuum modeling

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Journal of Materials Science & Technology 2020年第14期47卷 236-250页

作者： Ying-Jun Gao Qian-Qian Deng Zhe-yuan liu Zong-ji Huang Yi-xuan li Zhi-Rong Luo Guangxi Advanced Key Laboratory of Novel Energy Materials Guangxi Key Laboratory for the Relativistic AstrophysicsSchool of Physics Science and EngineeringGuangxi UniversityNanning530004China Institute of Physics Science and Engineering Technology Yulin Normal UniversityYulin537000China

The phase field crystal method and Continuum Modeling are applied to study the cooperative dislocation motion of the grain boundary(GB)migration,the manner of the nucleation of the grain and of the grain growth in two dimensions(2 D)under the deviatoric deformation at high *** types of the nucleation modes of new finding are observed by the phase field crystal simulation:The first mode of the nucleation is generated by the GB splitting into two sub-GBs;the second mode is of the reaction of the sub-GB dislocations,such as,the generation and annihilation of a pair of partial Frank sessile dislocation in 2 *** process can be considered as the nucleation of dynamic recrystallization;the third mode is caused by two oncoming rows of the dislocations of these sub-GBs,crossing and passing each other to form new gap which is the nucleation place of the new deformed *** research is shown that due to the nucleation of different modes the mechanism of the grain growth by means of the sub-GB migration is different,and therefore,the grain growth rates are also *** the deviatoric deformation of the applied biaxial strain,the grain growth is faster than that of the grain growth without external applied *** is observed that the cooperative dislocation motion of the GB migration under the deviatoric deformation accompanies with local plastic flow and the state of the stress of the system changes *** the system is in the process of recrystallized grain growth,the system energy is in an unstable state due to the release of the strain energy to cause that the reverse movement of the plastic flow *** area growth of the deformed grain is approximately proportional to the strain square and also to the time *** rule of the time square of the deformed grain growth can also be deduced by establishing the continuum dynamic equation of the biaxial strain-driven migration of the *** copper metal is taken as an example of the calcu

关键词： Grain boundary splitting Grain growth Dislocation reaction Atomistic simulation Continuum modeling

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Highly stretchable,conductive,and wide-operating temperature ionogel based wearable triboelectric nanogenerator

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Nano Research 2023年第9期16卷 11638-11645页

作者： Qianqian Zhu Weiqiang liao Cong Sun xuan Qin Fangjia Zhang Haifeng ji Yuqi li Zhen Wen Xuhui Sun Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China Key Laboratory of New Processing Technology for Nonferrous Metals and Materials Ministry of EducationCollege of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China

The rapid development of wearable electronic products brings challenges to corresponding power *** this work,a thermally stable and stretchable ionogel-based triboelectric nanogenerator(SI-TENG)for biomechanical energy collection is *** ionic conductivity of the ionogel increased to 0.53 S·m^(−1) through optimal regulation of the amount of aminoterminated hyperbranched polyamide(NH2-HBP),which also has high strain of 812%,excellent stretch recovery,and wide operating temperature range of−80 to 250°*** SI-TENG with this ionogel as electrode and silicone rubber both as the triboelectric layer and encapsulation layer exhibits high temperature stability,stretchability,and *** adding appropriate amount of nano SiO2 to triboelectric layer,the output performance is further improved by 93%.Operating in singleelectrode mode at 1.5 Hz,the outputs of a SI-TENG with an area of 3 cm×3 cm are 247 V,11.7μA,78 nC,and 3.2 W·m^(−2),*** was used as a self-charging power supply to charge a 22μF capacitor to 1.6 V in 167 s with the palm patting and then to power the electronic ***,the SI-TENG can also be used as a self-powered motion sensor to detect the amplitude and frequency of finger bending,human swallowing,nodding,and shaking of the head motion changes through the analysis of the output voltage.

关键词： triboelectric nanogenerator ionogel self-powered motion sensor stretchable temperature stability

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Targeting O-GlcNAcylation in ischemic stroke

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Neural Regeneration Research 2022年第11期17卷 2427-2428页

作者： xuan li Wei Yang Center for Perioperative Organ Protection Department of AnesthesiologyDuke University Medical Center

Ischemic stroke is a common and often devastating disease that prima rily affects the *** currently consists predominantly of acute thrombolysis and/or thrombectomy to restore blood *** reperfusion therapy,however,is only accessible to a small fraction of stroke patients,and even among these patients,many still suffer lifelong neurologic ***,new stroke therapeutics are urgently needed to improve the quality of life for stroke patients.

关键词： acute patients stroke

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Flexible and breathable 3D porous SSE/MXene foam towards impact/electromagnetic interference/bacteria multiple protection performance for intelligent wearable devices

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Nano Research 2023年第7期16卷 10164-10174页

作者： Min Sang Shuai liu jianpeng Wu Xinyi Wang Junshuo Zhang Yunqi Xu Yu Wang Jun li ji li Shouhu xuan Xinglong Gong CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230027China State Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230026China Anhui Weiwei Rubber Parts Group Co. Ltd.Tongcheng 231460China

As intelligent wearable devices,they will inevitably be subjected to various damages and disturbances from the external environment during daily ***,it is urgent to develop safeguarding materials with multiple protective ***,this work developed a flexible and breathable three-dimensional(3D)porous shear stiffening elastomer(SSE)/MXene(M-SSE)foam with impact/electromagnetic interference(EMI)/bacteria multiple protection performance for intelligent wearable *** continuous conductive MXene network in the 3D SSE porous structure made M-SSE foam exhibit excellent electromagnetic interference shielding property with a high shielding effectiveness of 34 *** to the shear stiffening effect of porous SSE matrix,M-SSE foam possessed unique anti-impact and protection *** energy dissipation rate reached up to more than 85%,illustrating M-SSE foam could effectively attenuate the external impact force and absorb the impact *** from the excellent photothermal performance of MXene,M-SSE foam achieved a considerable saturated temperature of 98℃ under 0.57 W/cm^(2) laser ***,M-SSE foam showed extraordinary antimicrobial property for Staphylococcus aureus according to the principle of photothermal ***,for the development of intelligent wearable devices,conductive MSSE foam could be used as an intelligent sensor to monitor various human movements owing to the highly sensitive *** work greatly expanded the application prospect of multifunctional protective materials in various complex environments and promoted the development of multifunctional smart wearable devices in protection field.

关键词： MXene three-dimensional(3D)porous foam electromagnetic interference shielding impact resistance antibacterial property intelligent wearable device

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Mendelian Randomization Analysis to Analyze the Effect of Emergency Caesarean Section on Different Allergic Diseases and Related Blood Markers

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Biomedical and Environmental Sciences 2023年第11期36卷 1084-1089页

作者： li Yu jian KAN xuan Department of Pediatrics General Hospital of Tianjin Medical UniversityTianjin 300052China

Caesarean section is a well-established surgical procedure that allows for maximum fetal rescue under special circumstances,such as intrauterine distress and intrauterine hypoxia,and minimizes injuries to pregnant women who cannot tolerate vaginal *** caesarean section is a special type of caesarean section that plays an important role in protecting the lives of pregnant mothers and fetuses[1].

关键词： Blood injuries Emergency

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Combination of heterogeneous Fenton-like reaction and photocatalysis using Co–TiO_2 nanocatalyst for activation of KHSO_5 with visible light irradiation at ambient conditions

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Journal of Environmental Sciences 2014年第12期26卷 2440-2450页

作者： Qingkong Chen Fangying ji Qian Guo jianping Fan xuan Xu School of River and Ocean Engineering Chongqing Jiaotong University Key Laboratory of Three Gorges Reservoir Region's Eco-Environment Ministry of Education Chongqing University National Centre for International Research of Low-carbon and Green Buildings Chongqing University T.Y.lin International Engineering Consulting (China) Co. Ltd

A novel coupled system using Co–Ti O2 was successfully designed which combined two different heterogeneous advanced oxidation processes, sulfate radical based Fenton-like reaction（SR-Fenton） and visible light photocatalysis（Vis-Photo）, for degradation of organic contaminants. The synergistic effect of SR-Fenton and Vis-Photo was observed through comparative tests of 50 mg/L Rhodamine B（Rh B） degradation and TOC removal. The Rhodamine B degradation rate and TOC removal were 100% and 68.1% using the SR-Fenton/Vis-Photo combined process under ambient conditions, respectively. Moreover, based on XRD, XPS and UV-DRS characterization, it can be deduced that tricobalt tetroxide located on the surface of the catalyst is the SR-Fenton active site, and cobalt ion implanted in the Ti O2 lattice is the reason for the visible light photocatalytic activity of Co–Ti O2. Finally, the effects of the calcination temperature and cobalt concentration on the synergistic performance were also investigated and a possible mechanism for the synergistic system was proposed. This coupled system exhibited excellent catalytic stability and reusability,and almost no dissolution of Co2＋was found.

关键词： Fenton-like Photocatalysis Cobalt Sulfate radical Visible light

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窟野河流域次降雨事件下水沙变化特征及其输移过程

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水土保持研究 2025年第2期32卷 52-60页

作者：杨晨佘冬立黄萱河海大学农业科学与工程学院南京211100

[目的]深入分析黄土高原粗沙区流域次降雨事件尺度下水沙动态变化特征及其输移过程,为黄土高原粗沙区流域的水沙管理和调控提供重要科学依据。[方法]以黄土高原中游粗沙多沙区窟野河流域为对象,收集2006—2019年间的160场次降雨事件水... 详细信息

[目的]深入分析黄土高原粗沙区流域次降雨事件尺度下水沙动态变化特征及其输移过程,为黄土高原粗沙区流域的水沙管理和调控提供重要科学依据。[方法]以黄土高原中游粗沙多沙区窟野河流域为对象,收集2006—2019年间的160场次降雨事件水沙数据。通过运用方差分析、水沙关系曲线、滞后分析等方法,比较位于窟野河及其子流域次降雨事件下产流输沙特征,构建了各流域次降雨事件尺度下水沙关系曲线,分析了水沙滞后关系及滞后指数的空间差异,以揭示次降雨尺度下窟野河流域的水沙输移过程。[结果](1)4个流域径流相关参数无显著差异,但泥沙相关参数差异显著;(2)位于窟野河上游东部的新庙流域水沙相关性强,表征外界人为干扰的参数(a)最大,位于上游西部的王道恒塔流域泥沙浓度低,水沙相关性弱,表征河流本身输沙能力的参数(b)最大;(3)新庙、王道恒塔和温家川3个流域的主要滞后模式为逆时针型,泥沙来源于上游区域,且高含沙降雨事件的滞后系数(HI)平均值多为负;而神木流域的主要滞后模式为“8”字型,指示泥沙来源相对接近流域出口,且高含沙降雨事件的HI平均值多为正。[结论]窟野河嵌套流域次降雨事件尺度下水沙变化空间差异显著,泥沙输移过程复杂,不同子流域滞后模式揭示了泥沙来源和输移机制的空间异质性。

关键词：次降雨事件尺度输移过程水沙关系滞后分析

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