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Stable immobilization of lithium polysulfides using three-dimensional ordered mesoporous Mn_(2)O_(3) as the host material in lithium-sulfur batteries

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Carbon Energy 2024年第6期6卷 99-112页

作者： Sung Joon Park Yun Jeong Choi hyun-seung Kim Min Joo hong hongjun chang Janghyuk Moon Young-Jun Kim Junyoung Mun Ki Jae Kim Department of Energy Science Sungkyunkwan UniversitySuwonGyeonggi-doRepublic of Korea Department of Energy Engineering Konkuk UniversitySeoulRepublic of Korea Advanced Batteries Research Center Korea Electronic Technology InstituteSeongnamRepublic of Korea Department of future Energy Engineering Sungkyunkwan UniversitySuwonRepublic of Korea Department of Energy Systems Engineering Chung-Ang UniversitySeoulRepublic of Korea SKKU Advanced Institute of Nanotechnology Sungkyunkwan UniversitySuwonGyeonggi-doRepublic of Korea SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan UniversitySuwonRepublic of Korea School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySuwonRepublic of Korea

Lithium-sulfur batteries(LSBs)have drawn significant attention owing to their high theoretical discharge capacity and energy ***,the dissolution of long-chain polysulfides into the electrolyte during the charge and discharge process(“shuttle effect”)results in fast capacity fading and inferior electrochemical *** this study,Mn_(2)O_(3)with an ordered mesoporous structure(OM-Mn_(2)O_(3))was designed as a cathode host for LSBs via KIT-6 hard templating,to effectively inhibit the polysulfide shuttle ***-Mn_(2)O_(3)offers numerous pores to confine sulfur and tightly anchor the dissolved polysulfides through the combined effects of strong polar-polar interactions,polysulfides,and sulfur chain *** OM-Mn_(2)O_(3)/S composite electrode delivered a discharge capacity of 561 mAh g^(-1) after 250 cycles at 0.5 C owing to the excellent performance of OM-Mn_(2)O_(3).furthermore,it retained a discharge capacity of 628mA h g^(-1) even at a rate of 2 C,which was significantly higher than that of a pristine sulfur electrode(206mA h g^(-1)).These findings provide a prospective strategy for designing cathode materials for high-performance LSBs.

关键词： host material lithium-sulfur battery ordered mesoporous structure shuttle effect transition-metal oxides

一种具有“盐响应”特性的两性离子聚合物增黏降滤失剂

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天然气工业 2024年第5期44卷 118-126页

作者：常晓峰中国石油集团川庆钻探工程有限公司长庆钻井总公司

随着深层、超深层及非常规油气开采的不断深入,钻井过程中盐污染已成为水基钻井液在极端盐度和高温条件下面临的严峻挑战,盐污染会导致钻井液流变性和滤失性能的急速恶化。为避免上述问题发生,通过自由基聚合反应研发了一种具有“盐响... 详细信息

随着深层、超深层及非常规油气开采的不断深入,钻井过程中盐污染已成为水基钻井液在极端盐度和高温条件下面临的严峻挑战,盐污染会导致钻井液流变性和滤失性能的急速恶化。为避免上述问题发生,通过自由基聚合反应研发了一种具有“盐响应”特性的两性离子聚合物增黏降滤失剂(PAMN),并利用红外光谱分析(fT-IR)、核磁共振氢谱分析(1h-NMR)、热重分析(TGA)、分子模拟技术(MS)、扫描电镜(SEM)及钻井液流变和滤失分析等实验方法,表征了PAMN的分子结构、热稳定性及增黏降滤失性能,并揭示了PAMN的“盐响应”机理。研究结果表明:①合成的PAMN热降解温度高达285℃,PAMN分子链在饱和盐水中的均方位移、扩散系数及回转半径远大于其在纯水中,其回转半径分别为12.5Å和3.8Å;②当氯化钠含量为0时,PAMN分子链内或分子链间正负离子基团通过静电吸引力形成空间网络形态而卷曲成类球状结构,随着氯化钠含量增加,其分子链逐渐转变为溶解性更好的柔性链状结构,对氯化钠表现出正响应性;③PAMN可将饱和盐水钻井液表观黏度增加542.9%,滤失量从194 mL降低至4.8 mL,具有良好的增黏和降滤失性能。结论认为,PAMN的研发成功从根本上实现了传统钻井液处理剂从“抗盐”到“盐响应”的转变,该产品在含盐膏的深层、超深层油气开发工程中具有广阔的应用前景。

关键词：深层、超深层盐膏地层水基钻井液盐响应型增黏降滤失两性离子聚合物

Orientation controlled photogenerated carriers on selfsupporting CdS/Ni_(3)S_(2) paper toward photocatalytic hydrogen evolution and biomass upgrading

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Rare Metals 2024年第5期43卷 2015-2025页

作者： Xiao-Yan Liu Qing Cao Gui-Xiang Li hui Liu Li-Li Zeng Li-Li Zhao Bin chang Xi-Wen Wang hong Liu Wei-Jia Zhou Institute for Advanced Interdisciplinary Research School of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China Institute of Chemical Sciences and Engineering Ecole Polytechnique Federale de Lausanne1015LausanneSwitzerland KAUST Catalysis Center King Abdullah University of Science and TechnologyThuwal 23955-6900Kingdom of Saudi Arabia School of Environment and Energy South China University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006China State Key Laboratory of Crystal Materials Shandong UniversityJinan250100China School of Mechanical Engineering Xi'an Jiaotong UniversityXi'an 710054China

The appropriate regulation of band structure is an effective strategy in constructing efficient photocatalytic *** photocatalytic system mainly employs powder photocatalysts,which makes their recovery reliant on expensive separation processes and severely limits their industrial ***,we constructed a novel CdS/Ni_(3)S_(2)heterostructure using free-standing and flexible nickel fiber paper as the *** regulated energy band structure achieves effective electron–hole *** as-synthesized flexible photocatalyst exhibits considerable photocatalytic activity toward the h_(2)evolution reaction under visible-light irradiation,with an h_(2)production rate of5.63μmol·cm^(-2)·h^(-1)(14.1 mmol·g^(-1)cat·h^(-1)according to the catalyst loading content).Additionally,the otherwisewasted excited holes simultaneously drive organic transformations to yield value-added organic products,thus markedly improving the photocatalytic h_(2)evolution *** a photocatalytic system is scaled up further,where a self-supported 20 cm×25 cm sample achieves a champion h_(2)production rate of 60-80μmol·h^(-1)under practical sun *** newly developed self-supported photocatalyst produces opportunities for practical solar h2production with biomass upgrading.

关键词： Self-supporting photocatalyst CdS/Ni_(3)S_(2) heterojunction hydrogen evolution Biomass upgrading Large-scaleapplication

高钒半高速钢合金熔覆层回火态显微组织和性能

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东北大学学报（自然科学版） 2024年第5期45卷 636-642页

作者：孙行陈伟罗昌刘常升东北大学材料科学与工程学院辽宁沈阳110819 宝钢轧辊科技有限责任公司江苏常州213003

为了满足对轧辊表面快速修复的需求,采用激光熔覆技术,将自主设计并制备的高钒半高速钢合金粉末熔覆到轧辊合金钢表面,考虑到锻钢轧辊和激光熔覆层组织之间的差异性,为了稳定组织,对熔覆层进行回火处理,回火温度为500℃并保温2 h.结果表... 详细信息

为了满足对轧辊表面快速修复的需求,采用激光熔覆技术,将自主设计并制备的高钒半高速钢合金粉末熔覆到轧辊合金钢表面,考虑到锻钢轧辊和激光熔覆层组织之间的差异性,为了稳定组织,对熔覆层进行回火处理,回火温度为500℃并保温2 h.结果表明,熔覆层的相组成主要是马氏体;其表面主要是细小等轴晶,晶内马氏体呈针状平行分布,回火后分解为铁素体和碳化物;其横截面的平均硬度为663.4 hV,是基体硬度的1.8倍;熔覆层平均摩擦系数为0.708,磨损率为6.142×10^(-6)mm^(3)·N^(-1)·m^(-1),磨损性能较基体提高25倍,磨损形貌较好,与磨损量结果保持一致.

关键词：激光熔覆回火半高速钢显微组织磨损性能

Graphene from microwave-initiated upcycling of waste polyethylene for electrocatalytic reduction of chloramphenicol

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Chinese Chemical Letters 2024年第4期35卷 187-192页

作者： Qiang Cao Xue-feng Cheng Jia Wang chang Zhou Liu-Jun Yang Guan Wang Dong-Yun Chen Jing-hui he Jian-Mei Lu College of Chemistry Chemical Engineering and Materials ScienceCollaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhou 215123China

Waste polyolefin plastics, accounting for 50% of all plastic waste, represent a tremendously unexploited carbon source. Efficiently upcycling polyolefin waste into value-added carbon materials for waste water treatment avoiding using noble metals is challenging but economically and environmentally sustainable. In this work, MAX-Ti_(3)AlC_(2) supported fe selectively catalyzes polyolefin into few-layered graphene in 5 min under microwave treatment. Graphene and MAX supported fe(fe@MLC) can completely(99.9%)degrade chloramphenicol(CAP) within 60 min, retain robust after 10 cycles and work efficiently at a wide p h range(3.87–13.03), avoiding the usage of noble metal. Moreover, the electrochemical active surface area(ECSA) of fe@MLC is 2.7 times higher than that of commercial Pt/C. This work provides a cheap and efficient catalyst that promotes deconstruction of plastic wastes and indirectly degrades antibiotics thereby realizes the treatment of waste water with waste plastic.

关键词： Microwave Ti_(3)AlC_(2) Electrochemistry Dechlorination Chloramphenicol

Plant cuticles repress organ initiation and development during skotomorphogenesis in Arabidopsis

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Plant Communications 2024年第6期5卷 100-116页

作者： Yuru Ma Wenwen chang Yongpeng Li Jiahui Xu Yongli Song Xinmiao Yao Lei Wang Yu Sun Lin Guo hao Zhang Xigang Liu Ministry of Education Key Laboratory of Molecular and Cellular Biology College of Life SciencesHebei Normal UniversityShijiazhuangHebei 050024China hebei Research Center of the Basic Discipline of Cell Biology College of Life SciencesHebei Normal UniversityShijiazhuangHebei 050024China hebei Collaboration Innovation Center for Cell Signaling and Environmental Adaptation College of Life SciencesHebei Normal UniversityShijiazhuangHebei 050024China hebei Key Laboratory of Molecular and Cellular Biology College of Life SciencesHebei Normal UniversityShijiazhuangHebei 050024China State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyChinese Academy of SciencesShijiazhuangHebei 050021China

After germination in the dark,plants produce a shoot apical hook and closed cotyledons to protect the quiescent shoot apical meristem(SAM),which is critical for seedling survival during *** factors that coordinate these processes,particularly SAM repression,remain *** cuticles,multilayered structures of lipid components on the outermost surface of the aerial epidermis of all land plants,provide protection against desiccation and external environmental *** and how cuticles regulate plant development are still ***,we demonstrate that mutants of BODYGUARD1(BDG1)and long-chain acyl-CoA synthetase2(LACS2),key genes involved in cutin biosynthesis,produce a short hypocotyl with an opened apical hook and cotyledons in which the SAM is activated during *** signaling represses expression of BDG1 and LACS2,as well as cutin *** analysis revealed that cuticles are critical for skotomorphogenesis,particularly for the development and function of *** and molecular analyses showed that decreased hOOKLESS1 expression results in apical hook opening in the *** hypoxia-induced expression of LITTLE ZIPPER2 at the SAM promotes organ initiation in the mutants,the de-repressed expression of cell-cycle genes and the cytokinin response induce the growth of true *** results reveal previously unrecognized developmental functions of the plant cuticle during skotomorphogenesis and demonstrate a mechanism by which light initiates photomorphogenesis through dynamic regulation of cuticle synthesis to induce coordinated and systemic changes in organ development and growth during the skotomorphogenesis-to-photomorphogenesis transition.

关键词： plant cuticles SAM quiescence organ initiation skotomorphogenesis photomorphogenesis

Lithiophilic Cof_(2)@C hollow spheres towards spatial lithium deposition for stable lithium metal batteries

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Journal of Energy Chemistry 2024年第10期97卷 55-67,I0002页

作者： Jianxing Wang Shuhao Yao Runming Tao Xiaolang Liu Jiazhi Geng chang hong huiying Li Guiyun Yu haifeng Li Xiao-Guang Sun Jianlin Li Jiyuan Liang School of Optoelectronic Materials&Technology jianghan UniversityWuhan 430056HubeiChina Institute for Advanced Materials and Manufacturing University of TennesseeKnoxilTN 37996USA School of Chemistry&Chemical Engineering Yancheng Institute of TechnologyYancheng 224051JiangsuChina Chemical Sciences Division Oak Ridge National LaboratoryOak RidgeTN 37831USA Applied Materials Division Argonne National LaboratoryLemontIL 60439USA

Lithium metal(LM)is a promising anode for next-generation batteries due to its high theoretical capacity and low electrode ***,side reactions,volume change,and unwanted lithium dendrite growth seriously limit the practical application of ***,with the aid of a hard template approach,a novel lithiophilic Cof_(2)-carbon hollow sphere(Cof_(2)@C-hS)composite material is successfully prepared via a facile in-situ fluorination and etching *** lithiophilic Cof_(2) acts as nucleation sites to reduce nucleation overpotential as well as induces the spatial Li deposition and the formation of Lifrich solid electrolyte interphase(SEI),and the hollow carbon matrix can enhance the electrical conductivity and offer free space for LM *** simulations reveal that the synergistic effect of lithiophilic Cof_(2) and hollow carbon matrix homogenizes the electric field distribution and Li~+*** from these advantages,the Cof_(2)@C-hS-modified copper substrate electrode delivers an enhanced Coulombic efficiency(CE)of 93.7%for 280 cycles at 1 mA cm^(-2)and 1 mA h cm^(-2).The symmetrical cell using Cof_(2)@C-hS can stably cycle more than 1800 h with a low voltage hysteresis of 11 mV at a current density of 0.5 MA cm^(-2)and an areal capacity of 0.5 mA h cm^(-2).Moreover,the Li@Cof_(2)@C-hS composite anode enables more than 300 stable cycles at 1 C with a capacity retention of 95%in LifePO_(4)-based full cell and 110 stable cycles at 1 C in LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)-based highvoltage full *** work might shed a new light on designing lithiophilic hosts to spatially confine LM deposition,realizing dendrite-free LM anodes and the practical applications of LM batteries.

关键词： Lithium metal anode Spatial deposition Stability Nanocomposite Lithiophilic Cof_(2)

Contribution to the knowledge of the crane fly genus helius(Diptera: Limoniidae) from Sichuan, China

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Zoological Systematics 2024年第4期 331-342页

作者： Shuo Ma Yuanyuan Xu Tongle Xin chang Liu Ding Yang Xiao Zhang Shandong Engineering Research Center for Environment-friendly Agricultural Pest Management College of Plant Health and Medicine Qingdao Agricultural University Guangxi Key Laboratory of Agric-Environment and Agric-Products Safety and National Demonstration Center for Experimental Plant Science Education Agricultural College Guangxi University College of Plant Protection China Agricultural University

Specimens of the crane fly genus helius Lepeletier & Serville, 1828 from Sichuan,China are examined and studied. Three helius species all belonging to the nominotypical subgenus are recognized, of which h.(h.) pallidissimoides Xu, Ma & Zhang, sp. nov. is described and illustrated as new to science, and h.(h.) pallidissimus Alexander, 1930 and h.(h.) franckianus Alexander, 1940 are redescribed and illustrated. for the first time, descriptions and illustrations are provided for the male of h.(h.) pallidissimus and the female of h.(h.)franckianus.

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Effect of Platelet-rich Plasma in Stimulating Macrophage Transformation into M2 Type under AMPK Signaling Pathway

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Chinese Journal of Biomedical Engineering(English Edition) 2024年第2期33卷 85-92页

作者： ZhONG chang-rui fU Chun-hua Longyan first Affiliated hospital of fujian Medical University Longyan Fujian 364000China The Second hospital of Longyan Longyan Fujian 364000China

Objective:To explore the effect of platelet-rich plasma(RPR)in stimulating the transformation of pro-inflammatory(M1)macrophages into antiinflammatory(M2)under the adenosine-monophosphate-dependent protein kinase(AMPK)signaling ***:Rat peritoneal macrophages(RAW264.7)were cultured and randomly divided into 8 groups:blank control group,LPS group,RPR group A,RPR group B,LPS+RPR(12 h)group,LPS+RPR(24 h)group A,LPS+RPR(24 h)group B,LPS+RPR(24 h)group *** was prepared based on blood *** expressions of AMPK signaling pathway-related proteins(AMPK,ULK1,m TOR)and macrophage markers(i NOS,Arg-1)in the blank control group,LPS group,LPS+RPR(12 h)group and LPS+RPR(24 h)group were observed and *** expressions of macrophage markers in LPS+RPR(24 h)B and C groups were compared,and the expressions of AMPK and TGf-βin RPR A and B groups were ***:The gray values of AMPK and ULK1 in LPS cells decreased significantly,while those in LPS+RPR(12 h)and LPS+RPR(24 h)A cells increased *** gray values of AMPK and ULK1 in LPS+RPR(24 h)A cells were higher than those in LPS+RPR(12 h)cells(Phe m TOR gray value of LPS cells was significantly higher than that of LPS+RPR(24 h)A cells,and the m TOR gray value of LPS+RPR(24 h)A cells was significantly lower than that of LPS+RPR(12 h)cells(Phe expression of i NOS in LPS cells was significantly decreased,the expression of i NOS in LPS+RPR(12 h)and LPS+RPR(24 h)cells was significantly increased,and the expression of i NOS in LPS+RPR(24 h)cells was higher than that in LPS+RPR(12 h)cells(Phe expression of Arg-1 in LPS cells was significantly decreased,the expression of Arg-1 in LPS+RPR(12 h)and LPS+RPR(24 h)A cells was significantly increased,and the expression of Arg-1 in LPS+RPR(24 h)A cells was higher than that in LPS+RPR(12 h)cells(Phe i NOS expression level of LPS+PRP(24 h)C cells was significantly higher than that of LPS+PRP(24 h)B cells,and the Arg-1 expression

关键词： platelet-rich plasma AMPK signaling pathway M2 macrophages anti-inflammatory factors