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study on preparation,characterization and application of mixed-colorants thermochromic microcapsules

Particuology 2024年第5期88卷 89-97页

作者： Lan Zhou Jingpeng Ye Qinze Cai Guojin Liu Mehran Dadgar Guocheng Zhu Guoqing Zhang College of textile science and Engineering (international Institute of silk) Zhejiang Sci-Tech UniversityHangzhou310018China school of Materials science& Engineering Zhejiang Sci-Tech UniversityHangzhou310018China Department of textile University of NeyshaburAdib BoulevardKhorasan Razavi ProvinceIran Zhejiang Charming Dyeing and Finishing Co. LtdJiaxing314500China Zhejiang Provincial Innovation Center of Advanced textile technology Shaoxing312000China

In order to expand the color-change range and make the discoloration temperature suitable for the daily textiles,a new formulation of mixed-colorants thermochromic core material is designed,in which crystal violet lactone(CVL)is the basic color former,bisphenol A(BPA)is the developer,especially the solvent-based dye and dodecyl dedecanoate are used as the extended dye and the solvent,*** electron microscope(sEM),differential scanning calorimeter(DsC)and thermogravimetric analyzer(tGA)were applied to study the morphology,encapsulation rate,non-isothermal crystallization behavior and thermal stability of the mixed-colorant thermochromic microcapsules(MCtMs)prepared by in-situ *** results show that MCtMs have good sphericity,uniform particle size,good thermal stability and the encapsulation rate can reach 86.73%.Under the non-isothermal conditions,the encapsulation of formaldehyde-melamine resin wall material can slightly reduce the crystallization rate of the solvent,but does not affect the relative crystallinity,thermal properties and discoloration sensitivity of the core *** the variety of ambient temperatures in the range of 20–35℃,the printed cotton fabrics with MCtMs could change color reversibly between different tones with good reliability and durability,and exhibit more gorgeous colors than the common thermochromic materials.

关键词： thermochromic microcapsule Color-change range Phase-change material Crystallization behavior

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RebL1 is required for macronuclear structure stability and gametogenesis in tetrahymena thermophila

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Marine Life science & technology 2024年第2期6卷 183-197页

作者： Huijuan Hao Yinjie Lian Chenhui Ren sitong Yang Min Zhao tao Bo Jing Xu Wei Wang Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education Institute of BiotechnologyShanxi UniversityTaiyuan 030006China school of Life science Shanxi UniversityTaiyuan 030006China shanxi Key Laboratory of Biotechnology Taiyuan 030006China

Histone modification and nucleosome assembly play important roles in chromatin-related *** chaperones form different complexes and coordinate histone transportation and *** histone chaperone complexes have been identified in different *** ciliate protozoa(ciliates)have various chromatin structures and different nuclear ***,histone chaperone components and functions of different subunits remain unclear in ***-rahymema thermophila contains a transcriptionally active macronucleus(MAC)and a transcriptionally inactive micronu-cleus(MIC)which exhibit multiple replication and various chromatin remodeling progresses during vegetative growth and sexual developmental ***,we found histone chaperone RebL1 not only localized evenly in the transcriptionally active MAC but also dynamically changed in the MIC during vegetative growth and sexual developmental ***1 knockdown inhibited cellular *** macronuclear morphology became bigger in growing *** abnormal macronuclear structure also occurred in the starvation ***,micronuclear meiosis was disturbed during sexual development,leading to a failure to generate new gametic ***1 potentially interacted with various factors involved in histone-modifying complexes and chromatin remodeling complexes in different developmental ***1 knockdown affected expression levels of the genes involved in chromatin organization and *** together,RebL1 plays a vital role in maintaining macronuclear structure stability and gametogenesis in ***.

关键词： Gametogenesis Histone chaperone Macronuclear structure RebL1 tetrahymena thermophilaIntroduction

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Visible light promoted aerobic selective photo-oxidation of cyclohexene on LaCo_(x)Cu_(1−x)O_(3) catalyst

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Nano Research 2024年第8期17卷 6940-6950页

作者： Xu Guo Liru song Wenyu Wang Fengfeng Li Minh Ngoc Ha Jun tang Qiang Ling Ping Cui Qingping Ke College of Chemistry and Chemical Engineering Anhui University of TechnologyMaanshan 243000China VNU Key Laboratory of Advanced Material for Green Growth Faculty of ChemistryUniversity of ScienceVietnam National UniversityHanoi 100000Vietnam

Heterogeneously catalyzed liquid oxidation of olefins with O_(2) provides an alternative way for synthesizing high-value added ***,we report a straightforward urea-redox and sol-gel process for synthesizing LaCo_(x)Cu_(1−x)O_(3) for aerobic photooxidation of *** research highlights a marked increase in the proportions of Co^(2+) and Cu+species in a low chemical state,as well as enhanced visible light absorption through this *** investigations suggest that the catalytic process,particularly with LaCo_(0.7)Cu_(0.3)O_(3),involves a radical pathway mediated by reactive oxygen *** presence of Cu+/Co^(2+) species and surface oxygen vacancies is proposed to boost O_(2) adsorption and activation on the catalyst,facilitating the formation of ***,Cu^(2+)/Co^(3+) species are thought to aid in generating cyclohexenederived radical *** efficient aerobic oxidation of cyclohexene on LaCo_(0.7)Cu_(0.3)O_(3) catalyst relies on the formation of reactive oxygen species and carbon radicals,facilitated by its strong visible light *** achieves a cyclohexene conversion of 89.4% and selectivity to cyclohex-2-ene-1-one of 72.2%,along with stable recyclability after six *** creation of nano-structured LaCo_(x)Cu_(1−x)O_(3) through the urea-redox and sol-gel process offers a promising avenue for the development of highly efficient catalysts for the aerobic photo-oxidation of cyclohexene to cyclohex-2-ene-1-one in the future.

关键词： perovskite oxide photocatalysis oxidation cyclohexene LaCoCuO_(3) cyclohex-2-ene-1-one

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structure engineering of cathode host materials for Li-s batteries

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Rare Metals 2024年第4期43卷 1370-1389页

作者： Jia-Jun Long Hua Yu Wen-Bo Liu school of New Energy and Materials Southwest Petroleum UniversityChengdu610500China school of Mechanical Engineering Sichuan UniversityChengdu610065China

Although lithium-sulfur batteries are one of the favorable candidates for next-generation energy storage devices,a few key challenges that have not been addressed have limited its *** challenges include lithium dendrite growth in the anode side,volume change of the active material,poor electrical conductivity,dissolution and migration of poly sulfides,and slow rate of solid-state reactions in the cathode *** the electrochemical performance of lithium-sulfur batteries is greatly affected by the design of the cathode host material,it has also been widely discussed in addressing the abovementioned *** this paper,three design ideas of cathode host materials in terms of microstructure,crystal structure and electronic structure are introduced and ***,the current progress of these three structural design strategies and their effects on the electrochemical performance of lithium-sulfur batteries are discussed in ***,future directions in the structural design of cathode materials for lithium-sulfur batteries are discussed and further perspectives are provided.

关键词： Lithium-sulfur batteries structure engineering Cathode Host materials

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synergy of inside doped metals–Outside coated graphene to enhance hydrogen storage in magnesium-based alloys

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Journal of Magnesium and Alloys 2024年第6期12卷 2462-2471页

作者： Kun Zhang Yu Chang Jingjing Lei Jing Chen tingzhi si Xiaoli Ding Ping Cui Hai-Wen Li Qingan Zhang Yongtao Li school of Materials science and Engineering&Low-Carbon New Materials Research Center Anhui University of TechnologyMaanshanAnhui 243002China Institute of Nuclear and New Energy technology Tsinghua UniversityBeijing100084 Hefei General Machinery Research Institute HefeiAnhui 230031China Key Laboratory of Green Fabrication and surface technology of Advanced Metal Materials of Ministry of Education Anhui University of TechnologyMaanshan 243002China

Grain growth of magnesium(Mg)and its hydride is one of the main reasons for kinetic and capacity degradation during the hydrogen absorption and desorption *** solve this problem,herein we propose a novel method involving synergistic effect of inside embedded metals and outside coated graphene to limit the growth of Mg and its hydride *** graphene coated Mg-Y-Al alloys were selected as a model system for demonstrating this positive effect where the Mg_(91)Y_(3)Al_(6)alloy was first prepared by rapidly solidified method and then high-pressure milled with 5 wt%graphene upon 5 MPa hydrogen gas for obtaining in-situ formed YAl_(2)and YH_(3)embedded in the MgH_(2)matrix with graphene shell(denoted as MgH_(2)-Y-Al@GR).In comparison to pure MgH_(2),the obtained MgH_(2)-Y-Al@GR composites deliver much better kinetics and more stable cyclic *** instance,the MgH_(2)-Y-Al@GR can release about 6.1 wt%H_(2)within 30 min at 300℃ but pure MgH_(2)only desorbs∼1.5 wt%H_(2).the activation energy for desorption of MgH_(2)-Y-Al@GR samples is calculated to be 75.3±9.1 kJ/mol that is much lower than approximately 160 kJ/mol for pure MgH_(2).Moreover,its capacity retention is promoted from∼57%of pure MgH_(2)to∼84%after 50th cycles without obvious particle agglomeration and grain *** synergistic effect of outside graphene coating with inside embedded metals which could provide a huge number of active sites for catalysis as well as inhibit the grain growth of Mg and its hydride is believed to be responsible for these.

关键词： Energy Hydrogen storage Mg alloys synergy effect

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POV-based molecular catalysts for highly efficient esterification of alcohols with aldehydes as acylating agents

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Chinese Chemical Letters 2024年第8期35卷 330-334页

作者： Zhikang Wu Guoyong Dai Qi Li Zheyu Wei shi Ru Jianda Li Hongli Jia Dejin Zang Mirjana Colovic Yongge Wei Key Lab of Organic Optoelectronics&Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China state Key Laboratory of Natural and Biomimetic Drugs Peking UniversityBeijing 100191China Institute of Materia Medica Shandong First Medical University&Shandong Academy of Medical SciencesJi'nan 250117China University of Belgrade VincaInstitute of Nuclear Sciences-National Institute of the Republic of SerbiaDepartment of Physical ChemistryBelgrade 11351Serbia

the selective oxidative esterification of aldehydes with alcohols to the corresponding esters has been one of the hot spots in scientific research and industrial ***,the application of precious metal catalytic systems is limited by their complicated synthetic steps and high *** a highly efficient,green,recyclable selective synthesis method of esters catalyzed by polyoxovanadate(POV)-based molecu-lar catalysts has been developed in this *** results show that supramolecular interaction between POV and 1,3-dibenzylimidazolium bromide(Act_(2)Im)can efficiently convert alcohols and aldehydes to the corresponding esters in high yield under much milder *** insight is also provided based on the control experiments,single crystal X-ray diffraction and cyclic voltammetry studies.

关键词： POV Oxidation supramolecular Esterification Catalyst

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High recorded color rendering performance of single-structured Ce,Mn:Y_(3)(Al,sc)_(2)Al_(3)O_(12)phosphor ceramics for high-power white LEDs/LDs

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Journal of Advanced Ceramics 2024年第6期13卷 810-820页

作者： Xuanchu Liu Congcong Yang Yanbin Li Chang Min Jian Kang tianyuan Zhou Chunming Zhou Chaofan shi Cen shao Bingheng sun Wieslaw strek Hao Chen Le Zhang Jiangsu Key Laboratory of Advanced Laser Materials and Devices School of Physics and Electronics EngineeringJiangsu Normal UniversityXuzhou 221116China Jiangsu Xiyi Advanced Materials Research Institute of Industrial technology Xuzhou 221400China Xuzhou EAGLED technology Co. Ltd.Xuzhou 221116China Xuzhou Kangna Advanced Materials technology Co. Ltd.Xuzhou 221116China shanghai Institute of Optics Fine Mechanics Chinese Academy of SciencesShanghai 201800China Institute of Low temperature and structure Research Polish Academy of SciencesWroclaw 50-422Poland state Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China

Achieving a high color rendering index(CRI)and luminous stability in single-structured Ce:Y_(3)Al_(5)O_(12)(Ce:YAG)phosphor ceramics(PCs)is crucial for high-power white light-emitting diodes or laser diodes(LEDs/LDs).However,cyan valleys and insufficient amounts of the red component in the Ce:YAG emission spectra significantly limit their real *** this work,a series of Ce,Mn:Y_(3)(Al,sc)_(2)Al_(3)O_(12)(Ce,Mn:YsAG)PCs were fabricated by vacuum sintering,and efficient spectral regulation was realized for full-color *** cyan valley was filled by the blueshifted emission peak of Ce^(3+)via sc^(3+)*** orange‒red emission at approximately 580 nm was effectively supplemented via Mn^(2+)*** particular,CRI of Ce,Mn:YsAG increased from 56.4 to 85.8,a 52%increase compared with that of Ce:YAG under high-power LED excitation,and the operating temperature was stable at approximately 50℃for long working ***,CRI of 80.9 could still be obtained for PC-based white *** results indicated that Ce,Mn:YsAG PC,which has excellent CRI and luminous stability,is an extremely promising color convertor for high-power white LEDs/LDs.

关键词： color rendering index(CRI) color converter Ce:Y_(3)Al_(5)O_(12)(Ce:YAG)phosphor ceramics(PCs) high-power white light-emitting diodes or laser diodes(LEDs/LDs) luminous stability

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中国新疆生态变迁——揭示气候变化对植被动态的影响

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Journal of Geographical sciences 2024年第6期34卷 1039-1064页

作者：郝海超姚俊强陈亚宁徐建华李稚段伟利萨达夫-伊斯梅尔王桂玲 Key Laboratory of Geographic Information science(Ministry of Education) School of Geographic SciencesEast China Normal UniversityShanghai200241China Graduate school of Advanced Integrated studies in Human survivability Kyoto UniversityYoshida-Nakaadachi 1Sakyo-kuKyoto 606-8306Japan Field scientific Experiment Base of Akdala Atmospheric Background Institute of Desert MeteorologyChina Meteorological AdministrationUrumqi 830011China state Key Laboratory of Desert and Oasis Ecology Key Laboratory of Ecological Safety and Sustainable Development in Arid LandsXinjiang Institute of Ecology and GeographyCASUrumqi 830011China school of Geographic science Nantong UniversityNantong 226007JiangsuChina

For the past several decades, climate change has been driving vegetation dynamics in arid regions worldwide. this study investigates vegetation dynamics and their links to climate from 1990 to 2020 in Xinjiang, china, using data from 30-m resolution land use and cover change, remote sensing, and climate reanalysis. Our approach encompasses a range of analytical techniques, including transfer matrix analysis, modeling, correlation, regression,and trend analysis. During the study period, there were major vegetation conversions from grassland to forestland in the mountains, and from cropland to grassland in the plains. Climate change emerged as an important trigger of these changes, as evidenced by the increase in net primary productivity in most vegetation types, except for cropland-grassland and grassland-cropland conversions. Precipitation and soil moisture were the most influential climatic factors, contributing 15.1% and 15.2%, respectively, to natural vegetation *** study also found that evapotranspiration serves as a key mechanism for moisture dissipation in the hydrological cycle of vegetation dynamics. the interplay between precipitation,soil moisture, and evapotranspiration is a critical pattern of climatic influence that shapes vegetation dynamics across zones of intersection, increase, decrease, and change. these insights are invaluable for informing vegetation conservation and development strategies in Xinjiang and other similar environments facing climate-driven ecological transitions.

关键词： climate change ecological transitions LUCC NPP efficiency vegetation dynamics Xinjiang

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金属无机复合抑制剂强化分离白钨矿与方解石

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transactions of Nonferrous Metals society of china 2024年第2期34卷 643-654页

作者：赵冠飞冯博朱冬梅邱仙辉高志勇严华山赖瑞森邱廷省江西理工大学江西省矿业工程重点实验室赣州341000 江西理工大学资源与环境工程学院赣州341000 中南大学资源加工与生物工程学院长沙410083

研究由硫酸铝和水玻璃硅酸钠(Alss)组成的金属无机复合抑制剂对白钨矿与方解石浮选分离的影响。Zeta电位和吸附量测定结果表明,由Al(OH)_(4)^(−)和siO_(m)(OH)_(n)^(4−2m−n)组成的负电荷胶体颗粒倾向于吸附在方解石表面,抑制油酸钠(NaOL... 详细信息

研究由硫酸铝和水玻璃硅酸钠(Alss)组成的金属无机复合抑制剂对白钨矿与方解石浮选分离的影响。Zeta电位和吸附量测定结果表明,由Al(OH)_(4)^(−)和siO_(m)(OH)_(n)^(4−2m−n)组成的负电荷胶体颗粒倾向于吸附在方解石表面,抑制油酸钠(NaOL)的吸附,而负电荷胶体颗粒在白钨矿表面的吸附量较低,导致NaOL在白钨矿表面的吸附量较大。接触角测量结果表明,白钨矿在NaOL+Alss溶液中的疏水性明显优于方解石。XPs测试结果表明,Al和si在方解石表面有吸附,而在白钨矿表面没有吸附。与只添加水玻璃(硅酸钠,ss)相比,Alss对方解石的抑制作用明显增强,对白钨矿浮选几乎没有影响。在白钨矿与方解石混合矿中添加Alss,可获得WO_(3)品位为68.34%、WO_(3)回收率为83.14%的白钨矿精矿。

关键词：白钨矿方解石分离强化油酸钠金属无机复合抑制剂

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Composite structure Al_(2)O_(3)/Al_(2)O_(3)-YAG:Ce/YAG ceramics with high color spatial uniformity for white laser lighting

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Journal of Advanced Ceramics 2024年第2期13卷 189-197页

作者： Pengfei sang Le Zhang Jian Kang Mingzhou Li shiwei Chen Peng Yang Bingheng sun Yang Li Wieslaw strek Hao Chen Jiangsu Key Laboratory of Advanced Laser Materials and Devices School of Physics and Electronics EngineeringJiangsu Normal UniversityXuzhou 221116China Jiangsu Xiyi Advanced Materials Research Institute of Industrial technology Xuzhou 221400China Xuzhou EAGLED technology Co. Ltd.Xuzhou 221116China Xuzhou Kangna Advanced Materials technology Co. Ltd.Xuzhou 221116China Xuzhou Fuchang Electronic technology Co. Ltd.Xuzhou 221116China shanghai Institute of Optics Fine Mechanics Chinese Academy of SciencesShanghai 201800China school of Material science and Engineering Shanghai Institute of TechnologyShanghai 201418China state Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China Institute of Low temperature and structure Research Polish Academy of SciencesWroclaw 50-422Poland

Composite ceramic phosphor(CCP)is a candidate light-conversion material to obtain the high-quality laser lighting *** based on the transmissive configuration model could not simultaneously meet the requirements of angular color uniformity and high thermal *** this study,a novel composite structure ceramic was designed,including Al_(2)O_(3)-YAG:Ce/YAG layered ceramic with a size of 1 mm×1 mm for lighting,and Al_(2)O_(3) ceramic(φ=16.0 mm)was used as the wrapping material due to its outstanding thermal *** prepared ceramics exhibited excellent thermal performance and no yellow ring *** this design,we achieved the match of the intensity distribution of the blue and yellow lights,resulting in a high angular color uniformity of 0.9 with a view angle of±80°.All ceramics showed no luminous saturation phenomenon,even the laser power density was increased up to 47.51 W/mm^(2).A high-brightness white-light source with a luminous flux of 618 lm,a luminous efficiency of 126 lm/W,a CCt of 6615 K,and a CRI of 69.9 was obtained in the transmissive *** particular,the surface temperature of the ceramic was as low as 74.1℃ under a high laser radiation(47.51 W/mm^(2)).these results indicate that Al_(2)O_(3)/Al_(2)O_(3)-YAG:Ce/YAG composite structure ceramic is a promising luminescent material in the high-power laser lighting applications.

关键词： Al_(2)O_(3)/Al_(2)O_(3)-YAG:Ce/YAG angular color uniformity high thermal stability high-power laser lighting

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