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Journal of Advanced Ceramics 2024年第5期13卷 590-601页

作者： Hui Chen Yulei Zhang Yanqin Fu wenhan Gai Junhao Zhao Haohui Zhang Shaanxi Key Laboratory of Fiber Reinforced Light Composite Materials Northwestern Polytechnical UniversityXi’an 710072China Henan Key Laboratory of High Performance Carbon Fiber Reinforced Composites Institute of Carbon Matrix CompositesHenan Academy of SciencesZhengzhou 450046China

Ultra-high-temperature ceramic nanowires have shown increasing potential for use as thermal structural ***,novel single-crystal Hf_(0.5)Ta_(0.5)C solid solution nanowires were synthesized and incorporated with a HfC coating to construct a robust structure with Hf_(0.5)Ta_(0.5)C solid solution nanowires uniformly distributed and interconnected within the *** novel Hf_(0.5)Ta_(0.5)C solid solution nanowires could effectively hinder crack propagation through crack tip pinning and crack *** mechanism substantially enhanced the elastic modulus and fracture toughness of the HfC coating by 53.29%and 59.67%,*** toughened HfC coating displayed superior fracture toughness and good interfacial binding strength with the substrate to resist severe oxidation and ***,the high thermal conductivity of the toughened HfC coating promoted heat ***,in comparison to the pure HfC coating,the toughened HfC coating displayed smaller mass and linear ablation rates of−0.35 mg·s^(−1)and−0.46μm·s^(−1),which decreased by 39.66%and 36.98%,*** work not only simultaneously enhances the mechanical properties and ablation resistance of HfC-coated carbon/carbon(C/C)composites but also provides novel prospects for advanced ultrahigh-temperature ceramic nanowires under extreme conditions.

关键词： Hf_(x)Ta_(1−x)C solid solution nanowires HfC coating carbon/carbon(C/C)composites mechanical performance ablationresistance

Assembling S-scheme heterojunction between basic bismuth nitrate and bismuth tungstate with promoting charges’separation for accelerated photocatalytic sulfamethazine degradation

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Journal of Materials Science & Technology 2024年第4期171卷 185-197页

作者： wenhan Chen Meng Dai Li Xiang Shan Zhao Shuguang Wang Zuoli He Shandong Key Laboratory of Water Pollution Control and Resource Reuse Shandong Key Laboratory of Environmental Processes and HealthSchool of Environmental Science and EngineeringShandong UniversityQingdao 266237China CEDAR Knight Cancer InstituteSchool of MedicineOregon Health and Science UniversityPortlandOR 97201United States Weihai Research Institute of Industrial Technology of Shandong University Shandong UniversityWeihai 264209China

The S-scheme heterojunction has garnered increasing attention due to its remarkable oxidation capacity and efficient separation of photogenerated *** this study,a one-pot glycerol-assisted hydrothermal process was utilized to successfully synthesize S-scheme heterojunction photocatalysts comprising basic bismuth nitrate(BBN)and bismuth tungstate(BWO).Interestingly,the BBN/BWO heterogeneous photo-catalysts exhibited the highest photocatalytic *** optimized product achieved the degradation of sulfamethazine(SMZ)within 1 h,with a kinetic constant(k)value of 0.05818 min^(−1).The degradation process was influenced significantly by·O^(2)−and h^(+)*** determine the degradation pathway of SMZ in the presence of BBN/BWO-0.6,liquid chromatography-mass spectrometry(LC-MS)analysis was performed,which revealed a decrease in the toxicity of intermediates and *** enhanced pho-tocatalytic activity can be attributed to the internal electric field(IEF)of the S-scheme heterojunction between BBN and BWO,effectively promoting the separation of photogenerated *** research presents a viable approach for developing S-scheme heterojunctions in SMZ photodegradation and other environmental applications.

关键词： Photocatalysis S-scheme Heterojunction Bi_(2)WO_(6) Sulfamethazine

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Photonics Research 2024年第4期12卷 804-812页

作者： XIAOYU NIE HAOTIAN SONG wenhan REN ZHEDONG ZHANG TAO PENG MARLAN O.SCULLY Institute for Quantum Science and Engineering Texas A&M UniversityCollege StationTexas 77843USA School of Physics Xi’an Jiaotong UniversityXi’an 710049China Department of Physics City University of Hong KongHong KongChina Baylor University WacoTexas 76706USA

The generation of speckle patterns via random matrices, statistical definitions, or apertures may not always result in optimal outcomes. Issues such as correlation fluctuations in low ensemble numbers and diffraction in long-distance propagation can arise. Instead of improving results of specific applications, our solution is catching deep correlations of patterns with the framework, Speckle-Net, which is fundamental and universally applicable to various systems. We demonstrate this in computational ghost imaging(CGI) and structured illumination microscopy(SIM). In CGI with extremely low ensemble number, it customizes correlation width and minimizes correlation fluctuations in illuminating patterns to achieve higher-quality images. It also creates non-Rayleigh nondiffracting speckle patterns only through a phase mask modulation, which overcomes the power loss in the traditional ring-aperture method. Our approach provides new insights into the nontrivial speckle patterns and has great potential for a variety of applications including dynamic SIM, X-ray and photo-acoustic imaging, and disorder physics.

关键词： CGI Deep ghost

Ultraviolet‑Irradiated All‑Organic Nanocomposites with Polymer Dots for High‑Temperature Capacitive Energy Storage

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Nano-Micro Letters 2024年第3期16卷 398-406页

作者： Jiale Ding Yao Zhou wenhan Xu Fan Yang Danying Zhao Yunhe Zhang Zhenhua Jiang Qing Wang College of Chemistry Jilin UniversityChangchun 130012People’s Republic of China Department of Materials Science and Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USAs Deutsches Elektronen-Synchrotron DESY Notkestr.8522607 HamburgGermany

Polymer dielectrics capable of operating efficiently at high electric fields and elevated temperatures are urgently demanded by next-generation electronics and electrical power *** inorganic fillers have been extensively utilized to improved high-temperature capacitive performance of dielectric polymers,the presence of thermodynamically incompatible organic and inorganic components may lead to concern about the long-term stability and also complicate film ***,zero-dimensional polymer dots with high electron affinity are introduced into photoactive allyl-containing poly(aryl ether sulfone)to form the all-organic polymer composites for hightemperature capacitive energy *** ultraviolet irradiation,the crosslinked polymer composites with polymer dots are efficient in suppressing electrical conduction at high electric fields and elevated temperatures,which significantly reduces the high-field energy loss of the composites at 200℃.Accordingly,the ultraviolet-irradiated composite film exhibits a discharged energy density of 4.2 J cm^(−3)at 200℃.Along with outstanding cyclic stability of capacitive performance at 200℃,this work provides a promising class of dielectric materials for robust high-performance all-organic dielectric nanocomposites.

关键词： High-temperature energy storage Polymer dots Ultraviolet irradiation All-organic composite dielectrics

Separate or Synergize?China and *** continuation on scientific and technological cooperation

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Beijing Review 2024年第12期67卷 40-41页

作者： Li wenhan 不详

The visits of American scientists to China in the 197Os catalyzed *** relations,ultimately leading to the signing of the U.S.-China Science and Technology Cooperation Agreement(STA)in *** pivotal agreement,which was routinely renewed every five years and expired last August,was granted an extension by Beijing and Washington to allow for an additional six months of *** and researchers in both countries are eagerly awaiting the final decision on the possible renewal.

关键词： continuation catalyzed routine

An Oversimplified Narrative?--The claim of China's "overcapacity" is distorting the truth of the new-energy industry

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Beijing Review 2024年第26期67卷 32-33页

作者： Li wenhan 不详

Senior *** European Union officials recently visiting China repeated concerns about the country's"overcapacity"during discussions with their Chinese *** to her latest trip to China in early April,the second in nine months,*** Secretary Janet Yellen said China's"overcapacity"in new industries like solar energy,electric vehicles(EVs)and lithium-ion batteries"distorts global prices"and"hurts American firms and workers,as well as firms and workers around the world."

关键词： fir simplified discussions

The Legend of the City

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China Book International 2024年第1期 52-57页

作者： Zhou wenhan 不详

This biography will trace the growth of Wen zhengming and explore how he became an artistic giant in an era that was iluminated by famous scholars and literati such as Shen Zhou,Zhu Yunming,Tang Yin,and Wang *** will also pay attention to the relationship between Wen zhengming,the city of Suzhou,and the people of different social classes in the city,and discuss the influence of Suzhou in the 15th and 16th centuries on Wen zhengming and the mark that Wen zhengming left on Suzhou in the 16th century and beyond.

关键词： Suzhou beyond giant

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A Message of Peace

Beijing Review 2024年第29期67卷 34-35页

作者： Li wenhan 不详

In a fractured world,how can international actors effectively address global issues?When should established and rising powers choose accommodation and cooperation to prevent war and safeguard global peace?What roles can middle powers and other regional countries play in preserving the positive regional trends of long peace and rapid growth?

关键词： peace Peace powers

Semiconductors Under Siege U.S. pressure promotes Chinese self-sufficiency

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Beijing Review 2024年第35期67卷 30-31页

作者： Li wenhan 不详

The sleek white boxes may be the size of small rooms,but they are the key to achieving precision on a microscopic *** boxes produce the world's most advanced microchips,which feature millions or even billions of tiny ... 详细信息

关键词： transistors white boxes

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Glory and Joy

Beijing Review 2024年第34期67卷 28-31页

作者： Li wenhan 不详

As China's table tennis star Sun Yingsha,representing Asia,ceremoniously extinguished the Olympic flame alongside athletes from other continents on August 11,the Paris 2024 Olympic Summer Games concluded with the waning *** lingers in addition to victories and medals is a mixture of emotions and the enduring spirit of sportsmanship.

关键词： representing What sports