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Synthesis and design of hypercrosslinked porous organic frameworks containing tetraphenylpyrazine unit for high-performance supercapacitor

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Journal of Polymer science 2024年第8期62卷 1629-1638页

作者： Ejaz, Mohsin Mohamed, Mohamed Gamal Chang, Wan-Chun Kuo, Shiao-Wei Department of Materials and Optoelectronic Science College of Semiconductor and Advanced Technology Research Center for Functional Polymers and Supramolecular Materials National Sun Yat-Sen University Kaohsiung Taiwan Chemistry Department Faculty of Science Assiut University Assiut Egypt Department of Medicinal and Applied Chemistry Kaohsiung Medical University Kaohsiung Taiwan

Human society faces significant environmental challenges due to the rapid production and consumption of fossil fuels. Therefore, developing effective and environmentally friendly methods of generating and storing energy is essential. Hypercrosslinked polymers (HPPs) have become increasingly popular due to their diverse preparation methods, simple functionalization, large specific surface area, low cost, mild reaction conditions, high chemical and thermal stability, and small size. We synthesized two hypercrosslinked porous organic polymers using Friedel-Crafts reactions of 2,3,5,6-tetraphenyl pyrazine (Pyra) with 4,4′-bis(chloromethyl)biphenyl (BP), and dimethoxymethane (DDM), resulting in Pyra-BP-HPP and Pyra-DDM-HPP, respectively. The chemical structures and thermal stability of these polymers were confirmed through solid-state 13C NMR, FTIR, and TGA. The surface area of Pyra-BP-HPP and Pyra-DDM-HPP was determined to be 984 and 435 m2 g−1, respectively, with micro and mesoporous structures present. Pyra-BP-HPP displayed a high specific capacitance of 94 F g−1 at 1 A g−1, with a capacity retention of 95% after 2000 cycles, which can be attributed to its larger surface area, microporosity, and abundance of electron-rich phenyl rings when compared to Pyra-DDM-HPP. © 2023 Wiley Periodicals LLC.

关键词： Supercapacitor

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Longitudinal characterization of the fluorescence properties of wax on avocado (Persea americana Mill.) skin during maturation using excitation-emission matrix

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Engineering in Agriculture, Environment and Food 2024年第4期17卷 144-153页

作者： Gao, Tianqi Saito, Yoshito Kuramoto, Makoto Zhang, Miao Yamamoto, Atsuhiro Hashiguchi, Shintaro Suzuki, Tetsuhito Kondo, Naoshi Graduate School of Agriculture Kyoto University Japan Institute of Science and Technology Niigata University Japan Advanced Research Support Center Ehime University Japan Agricultural Guidance Center Matsuyama Japan Graduate School of Bioresources Mie University Japan

Avocado oil content varies significantly during maturation, complicating harvest timing due to the lack of external indicators. Current oil content measurements rely on destructive methods that are time-consuming, costly, and require toxic solvents. This study explores fluorescence properties of avocado skin wax as a non-destructive maturity indicator. Using excitation-emission matrix (EEM) analysis, two fluorescence peaks associated with phenolic compounds were identified, both decreasing in intensity as the fruit matured. A strong negative correlation (r = −0.86) was observed between fluorescence intensity and oil content. These findings suggest that UV-excited surface fluorescence could enable rapid, non-invasive oil content estimation, paving the way for fluorescence-based imaging systems to enhance harvest management in avocado production. © 2024 Asian Agricultural and Biological Engineering Association. All rights reserved.

关键词： Fluorescence imaging

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A highly visible-transparent thermochromic smart window with broadband infrared modulation for all-season energy savings

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国家科学评论（英文版） 2025年第2期12卷 191-201页

作者： Yi Jiang Yunlong Wang Deshuo Kong Zipeng Chen Zhengwei Yang Ningning Cao Haowen Chi Shining Zhu Qiuhong Zhang Jia Zhu Bin Zhu National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional MaterialsFrontiers Science Center for Critical Earth Material CyclingCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Key Laboratory of High Performance Polymer Material and Technology of MOE Department of Polymer Science and EngineeringSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210093China

Thermochromic smart windows effectively reduce the energy consumption for buildings through passive light modulation including the transmission ofvisible(TVis)and near-infrared(TNIR)light,and the emissivity of mid-infrared light(εMIR)in response to ambient temperature ***,thermochromic windows that maintain high TVis while modulating TNIR and εMIR simultaneously are highly desirable but still ***,we develop a thermochromic smart window based on a two-way shape memory polymer to enable reversible transformation and achieve TNIR modulation of 44.0％andεMIR modulation of 76.5％while maintaining high TVis(＞50％).Compared to traditional windows based on silica glass,this device shows 4℃ lower temperature in summer daytime,2℃ higher in winter daytime,and 1℃ higher in spring *** is expected that our device can achieve greater annual energy savings in comparison with commercial glass anywhere in the world and promote the progress of thermochromic windows for energy-efficient buildings.

关键词： thermochromic smart window visible transparency infrared modulation two-way shape memory polymer

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Formation mechanism of co-axial grain boundaries in a Mg alloy

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Journal of Magnesium and Alloys 2023年第3期11卷 1094-1101页

作者： Zhen Peng Yi Liu Lirong Xiao Yue Yang Bo Gao Mengning Xu Zhaohua Hu Yandong Yu Xuefei Chen Hao Zhou School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China Nano and Heterogeneous Materials Center School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China Association for Science and Technology Nanjing University of Science and TechnologyNanjing 210094China Ansteel Beijing Research Institute Co. Ltd.Beijing 102209China Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of EducationHarbin University of Science and TechnologyHarbin 150080China

Due to the insufficient slip systems in hexagonal close-packed structure,twinning is frequently activated to support stable plastic deformation of Mg *** this work,we found four typical twin-like interfaces with misorientations of 102°,109°,142°and 149°,respectively,which had not only a shared[1120]zone axis of neighboring grains,but also overlapped diffraction spots similar to ***,highresolution transmission electron microscope(HRTEM)analysis revealed that the interfaces in real space deviated from the supposed twinning planes in reciprocal space,*** overlapped diffraction *** clarified that the incoherent interfaces were co-axial grain boundaries(CGBs).Additionally,a special angle ofθ,close to 90°,between the interface and one side of basal plane,was frequently formed in *** proposed that interaction of multiple twinning contributes to the formation of CGBs,and theθis formed due to alternative tensile and compression twinning under a uniaxial loading.

关键词： Interface Twinning Tilt boundaries TEM Formation mechanism

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A low-cost wide bandgap polymer based on carboxylate substituted thiazole enables efficient organic solar cells with remarkable batch-to-batch reproducibility

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science China Chemistry 2025年第2期68卷 733-744页

作者： Xiaodong Zhu Yuchen Lei Jianhong Gao Yanjun He Jinsicheng Liu Qian Guo Xiang Gao Liwei Xiong Xunchang Wang Renqiang Yang Zhitian Liu Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials Hubei Key Laboratory of Plasma Chemistry and Advanced MaterialsSchool of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205China Key Laboratory of Optoelectronic Chemical Materials and Devices(Ministry of Education) School of Optoelectronic Materials&TechnologyJianghan UniversityWuhan 430056China

Constructing the low-cost,high-efficiency,and good batch-to-batch reproducibility polymer donor is vitally important for the application of organic solar ***,we develop a structurally simple carboxylate-substituted thiazole as an electronwithdrawing building block to construct a low-cost polymer,PBTTzE,containing a facilely prepared chlorinated benzo[1,2-b:4,5-b′]dithiophene(BDTCl)donor *** from synergistic electron deficient effects of chlorination and ester group and C=N,as well as the noncovalent interaction of S…O and S…N,PBTTzE exhibits a deep HOMO energy level(−5.59 eV),and a planar skeleton *** combined with the IT-4F acceptor,the polymer(54 kDa)demonstrated a champion PCE of 15.87%,which is the highest value in the IT-4F-based binary devices to ***,PBTTzE exhibits excellent batch-tobatch reproducibility due to its very similar PCEs within a range of 43–76 *** addition,an alloyed state and complementary absorption can be formed between PM6 and ***,in a ternary device with PBTTzE added to the PM6:BTP-eC9 blend,a top PCE of 18.76%is achieved due to the suppressed energy loss,prolonged exciton diffusion distance,and improved charge *** work demonstrates that the carboxylate-substituted thiazole is a highly promising acceptor unit for constructing low-cost and high-performance polymers.

关键词： carboxylate substituted thiazole polymer donor low-cost batch-to-batch reproducibility organic solar cells

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Mangosteen peel-derived activated carbon for supercapacitors

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Progress in Natural science:Materials International 2022年第5期32卷 570-578页

作者： Jessada Khajonrit Thongsuk Sichumsaeng Ornuma Kalawa Suphawi Chaisit Atchara Chinnakorn Narong Chanlek Santi Maensiri School of Physics Institute of Science Suranaree University of Technology SUT-NANOTEC RNN on Nanomaterials and Advanced Characterizations Suranaree University of Technology SUT Center of Excellence on Advanced Functional Materials Suranaree University of Technology Synchrotron Light Research Institute (Public Organization)

This work reports the effects of activation temperatures on the porous development and electrochemical performance of activated carbons. Herein, activated carbons were prepared from the biowaste of mangosteen peel by using KOH activation at temperatures of 400, 600, and 800°C. The results demonstrate that the specific surface area increases with increasing the activation temperatures in which the well-developed porous structure after KOH activation at 800°C provides the highest specific surface area of 1039 m2g-1. At 600°C, the activated carbon delivers the highest specific capacitance value of 182 F g-1at a current density of 0.5 A g-1in 3 M KOH aqueous electrolyte. This is correlated well with its high micropore fractions（99%）. Moreover, it was found that the activation temperature changes the major contribution of oxygen-containing functional group on surface of activated carbon, which is beneficial for the enhancement of the specific capacitance value of activated carbon at the temperature of 600°C. This work suggests that the activation temperature is a key to optimizing the electrochemical performance of activated carbons. Overall, our activated carbons can be considered as a strong candidate for use as electrode materials in supercapacitors.

关键词： Mangosteen peel KOH activation Porous carbon Oxygen-containing functional group Supercapacitor

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Fabrication and mechanical properties of 3D printed nacre-inspired Al2O3-ZrO2 composite ceramics

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Ceramics International 2025年第16期51卷 22142-22152页

作者： Wu, Rina Zeng, Tao Fan, Meiling Cui, Yuhua Xu, Guodong Wang, Xiaohong Cheng, Su School of Materials Science and Chemical Engineering Harbin University of Science and Technology Harbin150080 China Department of Civil and Environmental Engineering College of Engineering Shantou University Shantou515063 China Special Ceramics Advanced Manufacturing Engineering Technology Research Center of Guangdong Provincial University Shantou515063 China

In the field of engineering materials, achieving a balance between high strength and high toughness often poses a challenge. Typically, enhancing the toughness of ceramics involves incorporating a ductile metallic or polymeric phase;however, their application in high-temperature environments is constrained. Inspired by the biological materials, this work proposes all-ceramic composite with nacre-like structure, which was prepared utilizing 3D printing technology. Flexural strength was tested by three-point bending and fracture toughness was determined by SEVNB. The crack growth resistance capability was evaluated using the J-integral method. The effects of the content of polymethyl methacrylate (PMMA) microspheres in the weak phase and volume fraction of the strong phase on the flexural strength, fracture toughness, and progressive failure behavior of nacre-inspired composite ceramics were elucidated. The nacre-inspired Al2O3-ZrO2 composite ceramics were found to exhibit non-brittle failure due to the layered features, whilst the Al2O3-ZrO2 composite ceramics fractured catastrophically, though it is expected to have a higher failure stress. The step-like fracture mode enhances energy dissipation during crack propagation, thereby resulting in a higher fracture toughness of the nacre-inspired Al2O3-ZrO2 composite ceramics compared to Al2O3-ZrO2 composite ceramics. The findings can serve as valuable guidance for the design and fabrication of nacre-inspired composites. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Fracture toughness

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A Cross-Modal Interactive Memory Network Based on Fine-Grained Medical Feature Extraction for Radiology Report Generation

A Cross-Modal Interactive Memory Network Based on Fine-Grain...

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2024 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2024

作者： Ma, Xitong Kuang, Yuansen Yuan, Lin Tian, Cheng Zeng, Yijie Liu, Song Jinan China Shandong Engineering Research Center of Big Data Applied Technology Faculty of Computer Science and Technology Jinan China Shandong Fundamental Research Center for Computer Science Shandong Provincial Key Laboratory of Computer Networks Jinan China

ISBN: (纸本)9781665410205

Radiology report generation is an essential task in the medical field, which aims to automate the generation of medical terminology descriptions of radiology images. However, this task currently suffers from several problems: 1) existing methods need to manually build knowledge graphs or templates (consuming time and effort) to introduce medical or prior knowledge to assist in report generation;2) previous models cannot handle the problem of data bias well (anomaly reports and anomaly descriptions make up only a tiny portion of the dataset), causing the models to ignore the learning of anomaly descriptions easily;3) existing approaches cannot robustly supervise the model, resulting in incomplete and inconsistent reports being generated. To address these issues, we propose a cross-modal interactive memory network based on fine-grained medical feature extraction. In our model, we design a cross-modal interactive memory network to automatically store and remember the required medical text knowledge and use this medical knowledge to help generate reports. Furthermore, we design an abnormal medical knowledge enhancement module to enhance the learning of abnormal fine-grained knowledge through the interaction of disease topics and their states to interact with text features. In addition, we design a cross-modal joint semantic loss unit to reduce semantic differences between different features and improve the visual representation ability of the model. We experimented and evaluated our model on MIMIC-CXR and IU-Xray datasets to compare with other baseline models. © 2024 IEEE.

关键词： Radiology

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Tailored BiVO_(4)/In_(2)O_(3)nanostructures with boosted charge separation ability toward unassisted water splitting

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Carbon Energy 2023年第6期5卷 45-59页

作者： Mi Gyoung Lee Jin Wook Yang Ik Jae Park Tae Hyung Lee Hoonkee Park Woo Seok Cheon Sol ALee Hyungsoo Lee Su Geun Ji Jun Min Suh Jooho Moon Jin Young Kim Ho Won Jang Department of Materials Science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoulRepublic of Korea Country Department of Applied Physics Sookmyung Women's UniversitySeoulRepublic of Korea Department of Materials Science and Engineering Yonsei UniversitySeoulRepublic of Korea Advanced Institute of Convergence Technology Seoul National UniversitySuwonRepublic of Korea

The development of new heterostructures with high photoactivity is a breakthrough for the limitation of solar-driven water ***,we first introduce indium oxide(In_(2)O_(3))nanorods(NRs)as a novel electron transport layer for bismuth vanadate(BiVO_(4))with a short charge diffusion ***_(2)O_(3)NRs reinforce the electron transport and hole blocking of BiVO_(4),surpassing the state-of-the-art photoelectrochemical performances of BiVO_(4)-based ***,a tannin-nickel-iron complex(TANF)is used as an oxygen evolution catalyst to speed up the reaction *** final TANF/BiVO_(4)/In_(2)O_(3)NR photoanode generates photocurrent densities of 7.1 mAcm^(−2) in sulfite oxidation and 4.2 mA cm^(−2) in water oxidation at 1.23 V versus the reversible hydrogen ***,the“artificial leaf,”which is a tandem cell with a perovskite/silicon solar cell,shows a solar-to-hydrogen conversion efficiency of 6.2%for unbiased solar water *** reveal significant advances in the photoactivity of TANF/BiVO_(4)/In_(2)O_(3)NRs from the tailored nanostructure and band structure for charge dynamics.

关键词： bismuth vanadate heterojunction indium oxide nanostructure photoelectrochemical water splitting

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Effect of coil and chamber structure on plasma radial uniformity in radio frequency inductively coupled plasma

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Plasma science and technology 2024年第7期26卷 58-66页

作者：赵洋周晓华高升荣宋莎莎赵玉真 Shaanxi International Joint Research Center for Applied Technology of Controllable Neutron Source Xijing UniversityXi’an 710123People’s Republic of China Technological Institute of Materials&Energy Science(TIMES) Xi’an Key Laboratory of Advanced Photo-electronics Materials and Energy Conversion DeviceSchool of Electronic InformationXijing UniversityXi’an 710123People’s Republic of China

Enhancing plasma uniformity can be achieved by modifying coil and chamber structures in radio frequency inductively coupled plasma(ICP)to meet the demand for large-area and uniformly distributed plasma in industrial *** study utilized a two-dimensional self-consistent fluid model to investigate how different coil configurations and chamber aspect ratios affect the radial uniformity of plasma in radio frequency *** findings indicate that optimizing the radial spacing of the coil enhances plasma uniformity but with a reduction in electron ***,optimizing the coil within the ICP reactor,using the interior point method in the Interior Point Optimizer significantly enhances plasma uniformity,elevating it from 56%to 96%within the range of the model ***,when the chamber aspect ratio k changes from 2.8 to 4.7,the plasma distribution changes from a center-high to a saddleshaped ***,the plasma uniformity becomes ***,adjusting process parameters,such as increasing source power and gas pressure,can enhance plasma *** findings contribute to optimizing the etching process by improving plasma radial uniformity.

关键词： inductively coupled plasma fluid simulation optimized coil chamber aspect ratio plasma uniformity

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