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Interfacial-engineered robust and high performance flexible polylactic acid/polyaniline/MXene electrodes for high-perfarmance supercapacitors

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Journal of Materials science & technology 2024年第36期203卷 201-210页

作者： Zhaoyang Li Jiongru Li Bo Wu Huige Wei Hua Guo Zeinhom M.El-Bahy Baosheng Liu Muhun He Saad Melhi Xuetao Shi Saleh D.Mekkey Yunlong Sun Ben Bin Xu Zhanhu Guo Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization College of Chemical Engineering and Materials ScienceTianjin University of Science and TechnologyTianjin 300457China College of Light Industry Science and Engineering Tianjin University of Science and TechnologyTianjin 300457China Tianjin Key Laboratory of Multiplexed Identification for Port Hazardous Chemicals Tianjin University of Science and TechnologyTianjin 300457China Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Department of Chemistry College of ScienceUniversity of BishaBisha61922Saudi Arabia Chemistry Department College of Sciences and ArtsNorthern Border UniversityRafha91911Saudi Arabia Department of Mechanical and Civil Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle Upon Tyne NE18STUK

Flexible supercapacitors with high mechanical strength,excellent flexibility,and high performance are highly desired to meet the increasing demands of flexible ***,the trade-offbetween mechanical and electrochemical properties remains *** this context,an interface-engineered strategy approach was proposed to construct polylactic acid(PLA)/polyaniline(PANI)/MXene(PPM)film electrodes for flexible supercapacitor *** the PPM electrode,the porous PLA prepared from the nonsolvent-induced-phase-separation method served as an ideal flexible substrate,providing excel-lent flexibility and high mechanical strength,whereas PANI as the coupling agent,enhanced the interfa-cial strength between PLA and the electroactive MXene that was firmly anchored and deposited on PLA through a facile layer-by-layer dip coating *** tensile strength at break,elongation at break,and toughness of PPM are 53.09 MPa,11.09%,and 4.12 MJ/m^(3),respectively,much higher than those of pure MXene(29.36 MPa,4.62%,and 0.75 MJ/m^(3)).At an optimum mass loading density of 3 mg cm−2 for MXene,the fabricated PPM3 film electrode achieved a high specific capacitance of 290.8 F g^(−1)at a cur-rent density of 1 A g^(−1)in the three-electrode setup,approximately 1.5 times that of 190.8 F g^(−1)for pure ***,the symmetric all-solid-state supercapacitor based on PPM3 film electrodes delivers a high specific capacitance of 193.7 F g^(−1)at a current density of 0.25 A g^(−1),with a corresponding high energy density of 9.3 Wh kg^(−1)at a power density of 291.3 W kg^(−1).The SC retains 86%of its original ca-pacitance even bent at 120°and also possesses an excellent fire-retardant ability,demonstrating its great potential for flexible and safe wearable electronics.

关键词： Flexible supercapacitors Porous polylactic acid MXene Interface engineering

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Recent advances on decomplexation mechanisms of heavy metal complexes in persulfate-based advanced oxidation processes

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Chinese Chemical Letters 2024年第6期35卷 146-154页

作者： Shili Wang Mamitiana Roger Razanajatovo Xuedong Du Shunli Wan Xin He Qiuming Peng Qingrui Zhang State Key Laboratory of Metastable Materials Science and Technology Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource ReuseYanshan UniversityQinhuangdao 066004China Hebei Key Laboratory of Agroecological Safetye Key Laboratory Hebei University of Environmental EngineeringQinhuangdao 066102China College of Life&Environment Sciences Huangshan UniversityHuangshan 245041China

In some industrial wastewater,heavy metals combine with organic complexing agents to form heavy metal complexes(HMCs).These HMCs can be difficult to decompose and remove through conventional techniques due to their higher stability than free heavy metal *** recent years,persulfate based advanced oxidation processes(PS-based AOPs)have been recognized as a viable technique for HMCs ***,a comprehensive and in-depth understanding of the relevant HMCs decomplexation mechanisms in PS-based AOPs is still *** review delineates the current progress of HMCs decomplexation in PS-based *** discuss the distinctions between the two widely used oxidant types in PS-based AOPs ***,we summarize and highlight the decomplexation mechanisms based on electron and energy transfer,and degradation pathways of *** also emphasize the effects of environmental water constituents,namely p H,inorganic ions,and natural organic matter(NOM),on HMCs ***,we identify the existing challenges and perspectives that will steer the direction of advancing PS-based AOPs to remove HMCs.

关键词： Heavy metal complexes Persulfate Advanced oxidation processes Decomplexation mechanisms Electron and energy transfer

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Improving hole transfer of boron nitride quantum dots modified PDI for efficient photodegradation

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Frontiers of Chemical science and engineering 2023年第11期17卷 1718-1727页

作者： Shiqing Ma Chundong Peng Zeyu Jia Yanmei Feng Kai Chen Hao Ding Daimei Chen Zhong-Yong Yuan Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastesNational Laboratory of Mineral MaterialsSchool of Material Sciences and TechnologyChina University of GeosciencesBeijing 100083China School of Materials Science and Engineering Nankai UniversityTianjin 300350China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoringand Pollution Control School of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China

In recent years,organic photocatalyst under visible-light absorption has shown significant potential for solving environmental ***,it is still a great challenge for constructing a highly active organic photocatalyst due to the low separation efficiency of photogenerated ***,an effective and robust photocatalyst perylene-3,4,9,10-tetracarboxylic diamide/boron nitride quantum dots(PDI/BNQDs),consisting of selfassemble PDI withπ–πstacking structure and BNQDs,has been constructed and researched under visible light *** PDI/BNQDs composite gradually increases organic pollutant photodegradation with the loading amount of *** 10 mL of BNQDs solution added(PDI/BNQDs-10),the organic pollutant photodegradation performance reaches a maximum,about 6.16 times higher with methylene blue and 1.68 times higher with ciprofloxacin than that of pure PDI *** enhancement is attributed to improved separation of photogenerated carriers from self-assembled PDI by BNQDs due to their preeminent ability to extract *** work is significant for the supplement of PDI supramolecular composite *** believe that this photocatalytic design is capable of expanding organic semiconductors’potential for their applications in photocatalysis.

关键词： PDI boron nitride quantum dots photocatalysis hole transfer

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Sulfhydryl-modified zeolite A with exceptional strontium adsorption selectivity

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science China Chemistry 2025年第5期68卷 1847-1858页

作者： Lingyi Li Lanxing Ren Dong Wang Junchang Chen Qi Guo Yuting Zhao Fuqiang Zhao Linwei He Jie Li Wenqi Zhang Lijuan Song Long Chen Lixi Chen Bin Wang Lin Zhu Tao Duan Zhifang Chai Shuao Wang State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences (RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow University School of Science Harbin Institute of Technology (Shenzhen) School of Chemistry and Chemical Engineering Hunan Province Key Laboratory for the Design and Application of Actinide ComplexesUniversity of South China Radioactive Waste Technology and Radiochemistry Research Department China Nuclear Power Technology Research Institute Co.Ltd. State Key Laboratory of Environment-Friendly Energy Materials School of National Defence Science & TechnologySouthwest University of Science and Technology

Efficient removal of trace radiostrontium from contaminated highly saline wastewater,such as seawater,remains a critical but challenging task due to the coexistence of large excess of hard cations like Na+,K+,Mg2+and particularly Ca2+,which shares similar physicochemical properties with Sr2+.Herein,we successfully boosted the selectivity by a sulfhydryl-functionalized NaA zeolite（SH-NaA） via ion exchange coupled with reinforced soft-soft interactions between sulfhydryl groups and Sr2+.Remarkably,SH-NaA achieved a 99.8%removal efficiency of Sr2+in the presence of a tenfold excess of Ca2+,with a distribution coefficient（Kd） of 4.98×10～5mL/*** effectiveness of SH-NaA in accurately capturing Sr2+was further validated by its superior dynamic adsorption performance in natural seawater compared to pristine NaA *** experiments highlighted SH-NaA’s exceptional Sr2+removal efficiency（qm=233.36 mg/g）,rapid adsorption kinetics（1 min）,superior decontamination depth（Kd=6.71×10～5mL/g）,and robust irradiation stability（400 kGy γ-ray）.X-ray photoelectron spectroscopy（XPS） and in situ Fouriertransform infrared（FTIR） analyses underscored the pivotal role of sulfhydryl groups in Sr2+*** functional theory（DFT） calculations revealed that the sulfhydryl-functionalized NaA zeolite exhibits the best selectivity toward Sr2+,with an interaction energy of-2.55 *** findings demonstrate that organic group functionalized zeolites hold significant promise for environmental remediation applications.

关键词： strontium selectivity adsorption seawater sulfhydryl NaA zeolite

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Pumping and sliding of droplets steered by a hydrogel pattern for atmospheric water harvesting

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National science Review 2023年第12期10卷 181-192页

作者： Wei Zhang Qinghua Ji Gong Zhang Zhenao Gu Haozhi Wang Chengzhi Hu Huijuan Liu Zhiyong Jason Ren Jiuhui Qu Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of Environment Tsinghua University Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences University of Chinese Academy of Sciences Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education) School of Materials Science and EngineeringTianjin University Department of Civil and Environmental Engineering and Andlinger Center for Energy and the Environment Princeton University

Atmospheric water harvesting is an emerging strategy for decentralized and potable water supplies. However,water nucleation and microdroplet coalescence on condensing surfaces often result in surface flooding owing to the lack of a sufficient directional driving force for shedding. Herein, inspired by the fascinating properties of lizards and catfish, we present a condensing surface with engineered hydrogel patterns that enable rapid and sustainable water harvesting through the directional pumping and drag-reduced sliding of water droplets. The movement of microscale condensed droplets is synergistically driven by the surface energy gradient and difference in Laplace pressure induced by the arch hydrogel patterns. Meanwhile, the superhydrophilic hydrogel surface can strongly bond inner-layer water molecules to form a lubricant film that reduces drag and facilitates the sliding of droplets off the condensing surface. Thus, this strategy is promising for various water purification techniques based on liquid–vapor phase-change processes.

关键词： atmospheric water harvesting droplet manipulation bio-inspired condensation

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Energy conversion due to non-ideal electric field in separatrix region of magnetotail reconnection

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Earth and Planetary Physics 2024年第5期8卷 787-796页

作者： YiNan Liu Keizo Fujimoto JianQiang Wang XiaoChuan Duan School of Space and Environment Beihang UniversityBeijing 102206China Key Laboratory of Space Environment Monitoring and Information Processing Ministry of Industry and Information TechnologyBeijing 102206China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

A recent satellite observation has revealed the presence of energy conversion in the separatrix region(SR)of magnetotail reconnection,driven by perpendicular *** investigated this phenomenon by means of particle-in-cell simulations in two-dimensional(2D)and three-dimensional(3D)*** result indicates that in the 2D simulation,energy conversion in the SR is dominated by parallel components,with the main influencing factor being the parallel electric field,which is not consistent with the ***,a case that is similar to the observation is found in the 3D simulation,suggesting that the observation result may be attributed to the 3D *** findings provide a potential explanation for the satellite observation.

关键词： magnetic reconnection energy conversion PIC simulation separatrix region

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Yolk shell-structured pyrite-type cobalt sulfide grafted by nitrogen-doped carbon-needles with enhanced electrical conductivity for oxygen electrocatalysis

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Chinese Chemical Letters 2024年第7期35卷 212-217页

作者： Jiahao Xie Jin Liu Bin Liu Xin Meng Zhuang Cai Xiaoqin Xu Cheng Wang Shijie You Jinlong Zou Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People’s Republic of ChinaSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China

Pyrite-type sulfides(PTS)exhibit promising intrinsic activities for oxygen reduction and evolution reactions(ORR/OER).However,their poor electrical conductivities may limit the charge transfer rate to inevitably lower ***,yolk-shell structured cobalt-pyrite nanospheres(CoS_(2)YSS)are prepared and modified with amino groups as nucleation sites for coupling highly-conductive needle-like nitrogendoped carbon via a facile solvothermal method(CoS_(2)YSS@NC).The as-marked CoS_(2)YSS@NC-0.5 shows a gap between yolk and shell,and an obvious exterior layer of grafted NC,which can provide an integrated structure,an interior place,and three exposed surfaces on CoS_(2).CoS_(2)YSS@NC-0.5 reveals higher ORR activity(half-wave potential of 0.88 V)and methanol resistance than commercial Pt/*** to in-situ formation of highly-active CoOOH,CoS_(2)YSS@NC-0.5 shows a better overpotential(244 mV at 10 mA/cm^(2))and Tafel slope(135 mV/dec)than ***-air battery with CoS_(2)YSS@NC-0.5 air-cathode exhibits good open circuit potential(1.44 V),specific capacity(772.5 mAh/g)and cycling ***-like NC layer coated on the yolk-shell structure of CoS_(2)effectively lowers the charge transfer resistance to obtain extraordinary ORR/OER *** indicates that the integration of highly-conductive carbon onto pyritetype sulfides is an effective strategy to acquire durable bifunctional ORR/OER catalysts.

关键词： Cobalt sulfides Cycle stability Electrical conductivity Pyrite Yolk-shell structure

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Coupling Co-Ni phosphides for energy-saving alkaline seawater splitting

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Nano Research 2024年第6期17卷 4797-4806页

作者： Weijia Liu Wenxian Liu Tong Hou Junyang Ding Zhigui Wang Ruilian Yin Xingyuan San Ligang Feng Jun Luo Xijun Liu State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Nonferrous Metals and Featured MaterialsMOE Key Laboratory of New Processing Technology for Nonferrous Metals and MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China Hebei Key Laboratory of Optic-electronic Information and Materials the College of Physics Science and TechnologyHebei UniversityBaoding 071002China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaShenzhen 518110China

The coupling of energy-saving small molecule conversion reactions and hydrogen evolution reaction(HER)in seawater electrolytes can reduce the energy consumption of seawater electrolysis and mitigate chlorine corrosion ***,the fabrication of efficient multifunctional catalysts for this promising technology is of great ***,a heterostructured catalyst comprising CoP and Ni_(2)P on nickel foam(CoP/Ni_(2)P@NF)is reported for hydrazine oxidation(HzOR)-assisted alkaline seawater *** coupling of CoP and Ni_(2)P optimizes the electronic structure of the active sites and endows excellent electrocatalytic performance for HzOR and ***,the two-electrode HzOR-assisted alkaline seawater splitting(OHzS)cell based on the CoP/Ni_(2)P@NF required only 0.108 V to deliver 100 mA·cm^(−2),much lower than 1.695 V for alkaline seawater electrolysis ***,the OHzS cell exhibits satisfactory stability over 48 h at a high current density of 500 mA·cm^(−2).Furthermore,the CoP/Ni_(2)P@NF heterostructured catalyst also efficiently catalyzed glucose oxidation,methanol oxidation,and urea oxidation in alkaline seawater *** work paves a path for high-performance heterostructured catalyst preparation for energy-saving seawater electrolysis for H_(2) production.

关键词： seawater splitting heterostructure electrocatalysis hydrazine oxidation reaction hydrogen evolution reaction

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Effects of thawing-induced softening on fracture behaviors of frozen rock

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Journal of Rock Mechanics and Geotechnical engineering 2024年第3期16卷 979-989页

作者： Ting Wang Hailiang Jia Qiang Sun Xianjun Tan Liyun Tang College of Geology and Environment Xi’an University of Science and TechnologyXi’an710054China College of Architecture and Civil Engineering Xi’an University of Science and TechnologyXi’an710054China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430064China

Due to the presence of ice and unfrozen water in pores of frozen rock,the rock fracture behaviors are susceptible to *** this study,the potential thawing-induced softening effects on the fracture behaviors of frozen rock is evaluated by testing the tension fracture toughness(KIC)of frozen rock at different temperatures(i.e.-20℃,-15℃,-12℃,-10℃,-8℃,-6℃,-4℃,-2℃,and 0℃).Acoustic emission(AE)and digital image correlation(DIC)methods are utilized to analyze the microcrack propagation during *** melting of pore ice is measured using nuclear magnetic resonance(NMR)*** results indicate that:(1)The KIC of frozen rock decreases moderately between-20℃ and-4℃,and rapidly between-4℃ and 0℃.(2)At-20℃ to-4℃,the fracturing process,deduced from the DIC results at the notch tip,exhibits three stages:elastic deformation,microcrack propagation and microcrack ***,at-4℃e0℃,only the latter two stages are observed.(3)At-4℃e0℃,the AE activities during fracturing are less than that at-20℃ to-4℃,while more small events are reported.(4)The NMR results demonstrate a reverse variation trend in pore ice content with increasing temperature,that is,a moderate decrease is followed by a sharp decrease and-4℃ is exactly the critical ***,we interpret the thawing-induced softening effect by linking the evolution in microscopic structure of frozen rock with its macroscopic fracture behaviors as follow:from-20℃ to-4℃,the thickening of the unfrozen water film diminishes the cementation strength between ice and rock skeleton,leading to the decrease in fracture ***-4℃ to 0℃,the cementation effect of ice almost vanishes,and the filling effect of pore ice is reduced significantly,which facilitates microcrack propagation and thus the easier fracture of frozen rocks.

关键词： Frozen sandstone Different thawing temperature Fracture toughness Microcrack propagation process Unfrozen water content

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The Scanning Secondary Moire Method with Atomic-Level Resolution and Large Micrometer-Scale Field of View

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Acta Mechanica Solida Sinica 2025年第2期38卷 300-308页

作者： Yao Zhao Yueyue Xu Zhanwei Liu Jiangfan Zhou Han Liu Jianxin Nie Jinzhao Zhao Avic Changcheng Institute of Metrology&Measurement Beijing100095China State Key Laboratory of Explosion Science and Safety Protection Beijing Institute of TechnologyBeijing100081China School of Aerospace Engineering Beijing Institute of TechnologyBeijing100081China Beijing Institute of Structure and Environment Engineering Beijing100076China

The measurement field of view of the conventional transmission electron microscopy(TEM)nano-moiréand scanning transmission electron microscopy(STEM)nano-moirémethods is limited to the hundred-nanometer scale,unable to meet the deformation field measurement requirements of micrometer-scale materials such as transistors and *** paper proposed a novel measurement method based on scanning secondary moire,which can realize cross-scale deformation field measurement from nanometers to micrometers and solve the problem of insufficient measurement accuracy when using only the TEM moire *** method utilized the electron wave in the TEM passing through the atomic lattice of two layers of different materials to generate TEM *** this basis,the TEM was tuned to the STEM mode,and by adjusting parameters such as the amount of defocusing,magnification,scanning angle,etc.,the electron beam was focused on the position near the interface of the two layers of materials,and at the same time,the scanning line was made approximately parallel to the direction of one of the TEM moire *** scanning secondary moire patterns were generated when the scanning spacing was close to the TEM moire *** this method,the deformation field,mechanical properties,and internal defects of crystals can be detected by a large field of view with high sensitivity and high *** to traditional methods,the advantages of scanning secondary moire method lie in significantly improving the measurement field of TEM moire and STEM moire methods,realizing the cross-scale visualization measurement from nanometers to micrometers,and possessing atomic-level displacement measurement *** can also simplify and efficiently identify dislocations,offering a new method for large-area visualization observation of dislocation density in broad application prospects.

关键词： Nano-moire Scanning secondary moire Deformation fields Cross-scale visualization measurement Dislocation density

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