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Create Rich Oxygen Defects of Unique Tubular Hierarchical Molybdenum Dioxide to Modulate Electron Transfer Rate for Superior High-Energy Metal-Ion Hybrid Capacitor

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Energy & Environmental Materials 2023年第3期6卷 193-204页

作者： Heng Zhang Jinggao Wu Zhuo Zou Youcun bai Chao Wu Qingxin Zeng Feng liu Wei Shen Jian Jiang Chang Ming li Institute of Clean Energy and Advanced Materials School of Materials and energySouthwest UniversityChongqing 400715China Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies Chongqing 400715China Key Laboratory of Rare Earth Optoelectronic Materials&Devices College of Chemistry and Materials EngineeringHuaihua UniversityHuaihua 418000China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 401331China Institute of Materials Science and Devices School of Materials Science and EngineeringSuzhou University of Science and TechnologySuzhou 215011China

Metal-ion capacitors could merit advantages from both batteries and capacitors,but they need to overcome the severe restrictions from their sluggish reaction kinetics of the battery type electrode and low specific capacitance of capacitor type electrode for both high energy and power ***,we use the Kirkendall effect for the first time to synthesize unique tubular hierarchical molybdenum dioxide with encapsulated nitrogen-doped carbon sheets while in situ realizing phosphorus-doping to create rich oxygen vacancies(P-MoO_(2-x)@NP-C)as a sodium-ion *** and theoretical analysis confirm that the P-doping introduced oxygen defects can partially convert the high-bond-energy Mo–O to low-bond-energy Mo–P,resulting in a low oxidation state of molybdenum for enhanced surface reactivity and rapid reaction *** as-prepared P-MoO_(2-x)@NP-C as an ion-battery electrode is further used to pair active N-doped carbon nanosheet(N-C-A)electrode for Na-ion hybrid capacitor,delivering excellent performance with an energy density of 140.3 Wh kg^(−1),a power density of 188.5 W kg^(−1)and long stable life in non-aqueous solution,which ranks the best among all reported MoO x-based hybrid capacitors.P-MoO_(2-x)@NP-C is also used to fabricate a zinc-ion hybrid capacitor,also accomplishing a remarkable energy density of 43.8 Wh kg^(−1),a power density of 93.9 W kg^(−1),and a long stable life@2A g^(−1)of 32000 cycles in aqueous solutions,solidly verifying its universal *** work not only demonstrates an innovative approach to synthesize high-performance metal ion hybrid capacitor materials but also reveals certain scientific insights into electron transfer enhancement mechanisms.

关键词： molybdenum dioxide oxygen vacancies phosphorus incorporation sodium-ion hybrid capacitor Zinc-ion hybrid capacitor

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我国数字化口腔医学教育发展现状研究

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口腔医学 2024年第1期44卷 1-5页

作者：史雨林李刚侯晓冲白石柱赵铱民空军军医大学第三附属医院口颌系统重建与再生全国重点实验室陕西西安710005

本文通过设计电子问卷、电话专访的形式,调研了全国94所口腔医学类本、专科院校的数字化口腔医学教育现状,显示近年来我国数字化口腔医学教育有了快速的发展,大多数院校已逐步使用数字化教学手段,部分院校已开展数字化口腔诊疗技术教学... 详细信息

本文通过设计电子问卷、电话专访的形式,调研了全国94所口腔医学类本、专科院校的数字化口腔医学教育现状,显示近年来我国数字化口腔医学教育有了快速的发展,大多数院校已逐步使用数字化教学手段,部分院校已开展数字化口腔诊疗技术教学内容,但数字化口腔医学教育在我国的发展仍不普及,还存在对其重要性认识不足、人才培养不能满足应用需求、数字化教育课程不丰富等问题。针对这些问题,本文提出了加快我国数字化口腔医学教育发展的相关建议和意见。

关键词：数字化口腔医学教育虚拟仿真设备师资

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新型BTK-PROTAC分子的设计、合成及生物活性评价

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合成化学 2024年第6期32卷 534-541页

作者：葛子豪周卯查永骏白海云钟利安徽中医药大学药学院安徽合肥230012 长三角药物高等研究院江苏南通226133 百极弘烨(南通)医药科技有限公司江苏南通226133

蛋白降解靶向嵌合体(PROTAC)技术在新药研发领域越来越受到重视。基于NX-5948的靶蛋白配体(Warhead)结构,采用5-氟吲哚代替吡嗪胺的思路进行改造,成功合成化合物A。为研究不同连接子(linker)和E3配体对蛋白降解活性的影响,成功设计合成... 详细信息

蛋白降解靶向嵌合体(PROTAC)技术在新药研发领域越来越受到重视。基于NX-5948的靶蛋白配体(Warhead)结构,采用5-氟吲哚代替吡嗪胺的思路进行改造,成功合成化合物A。为研究不同连接子(linker)和E3配体对蛋白降解活性的影响,成功设计合成了化合物B~F,化合物A~F结构均经^(1)H NMR和MS表征。通过蛋白质免疫印迹法(Western blot,WB)分别测定目标化合物布鲁顿酪氨酸激酶(BTK)的降解活性。结果表明:化合物A、C、D、E、F都有近似于NX-5948的蛋白降解活性,其半数降解浓度(DC_(50))小于1 nM;并且所有目标化合物24 h最大降解程度(D_(max))均略优于NX-5948,为进一步化合物改造提供结构依据。

关键词：蛋白降解靶向嵌合体布鲁顿酪氨酸激酶蛋白降解合成分子设计

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右美托咪定联合动画片辅助对全麻腹腔镜疝囊高位结扎术患儿术后行为改变的影响

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临床误诊误治 2024年第1期37卷 105-111页

作者：李媛媛张俊丽杨鸿源白耀武尹静唐山市妇幼保健院麻醉科河北唐山063000

目的探讨右美托咪定联合动画片干预对防治全麻腹腔镜疝囊高位结扎术患儿术后行为改变的临床意义。方法选取2020年4月—2022年12月择期行全麻腹腔镜疝囊高位结扎术的患儿270例为研究对象,根据就诊序号采用电脑随机数字表法分为A组(予以... 详细信息

目的探讨右美托咪定联合动画片干预对防治全麻腹腔镜疝囊高位结扎术患儿术后行为改变的临床意义。方法选取2020年4月—2022年12月择期行全麻腹腔镜疝囊高位结扎术的患儿270例为研究对象,根据就诊序号采用电脑随机数字表法分为A组(予以右美托咪定干预)、B组(予以动画片干预)、C组(予以右美托咪定联合动画片干预),每组90例。比较3组不同时间点平均动脉压(MAP)、心率(HR)、呼气末二氧化碳分压(P ET CO_(2))、血氧饱和度(SpO_(2))、呼吸频率(RR)、改良耶鲁围术期焦虑量表(mYPAS)评分以及诱导期合作度量表(ICC)评分、苏醒期躁动评分量表(PAED)评分、躁动发生率、苏醒情况、术后行为改变情况。结果在术前麻醉准备期间(T 2)、入手术室(T3)、术后苏醒即刻(T4),C组HR、MAP低于A组、B组(P0.05)。T2、T3时,C组mYPAS评分低于A组、B组(P0.05)。结论右美托咪定联合动画片干预可降低行全麻腹腔镜疝囊高位结扎术患儿术前焦虑,提升患儿麻醉诱导合作程度,降低苏醒期躁动及术后行为改变发生率,且对患儿血流动力学影响较小,安全性高。

关键词：腹腔镜疝囊高位结扎术右美托咪定动画片麻醉,全身儿童血流动力学行为改变焦虑

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2023年甘肃积石山M_(S)6.2地震中川乡泥流成因及破坏性分析

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地震工程学报 2024年第4期46卷 768-777页

作者：白卓立季灵运朱良玉程宏宾徐晶边宗攀王金烁李岩唐红涛中国地震局第二监测中心陕西西安710054

2023年12月18日23时59分,甘肃临夏州积石山县发生6.2级地震,并诱发了大量地质灾害,其中,中川乡砂土液化泥流灾害造成了重大的经济损失与人员伤亡,亟需对其特征、成因、破坏性进行分析厘定。根据已有文献资料,利用获取的高精度、高分辨... 详细信息

2023年12月18日23时59分,甘肃临夏州积石山县发生6.2级地震,并诱发了大量地质灾害,其中,中川乡砂土液化泥流灾害造成了重大的经济损失与人员伤亡,亟需对其特征、成因、破坏性进行分析厘定。根据已有文献资料,利用获取的高精度、高分辨率数字成果,借助影像解译、地面调查,对震后泥流灾害进行综合分析。结果表明:(1)易滑且饱水黄土在地震的震动载荷作用下,土体内孔隙水压力迅速升高导致砂土液化,最终土层失稳破坏,导致台地边缘垮塌与地震滑坡。土水混合物在重力作用下,顺着高差沿沟谷、冲沟前进形成液化型滑坡-泥流灾害。(2)此次灾害现象并非泥流单一作用,而是砂土液化导致的泥流和砂涌同时存在,二者同时发生的概率很低,破坏性极大。(3)此次地震为典型的“小震、中震大灾”情况,相比其他相似成因液化滑坡灾害,其规模更大;相比其他相近震级地震,其造成的破坏及伤亡更大。此次地震诱发的地质灾害具有一定的特殊性与异常性。

关键词：积石山M_(S)6.2地震液化泥流成因破坏性分析砂涌

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n-Type Semiconductive Polymers Based on Pyrene-1,5,6,10-Tetracarboxyl Diimide

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高分子科学:英文版 2023年第10期41卷 1584-1590页

作者： Xu-Dong bai Zi-Di Yu Yao li Tian-Yu Zhang Di Zhang Jie-Yu Wang Jian Pei Da-Hui Zhao Beijing National Laboratory for Molecular Sciences Centre of Soft Matter Science and Engineering and Key Lab of Polymer Chemistry&Physics of Ministry of EducationCollege of ChemistryPeking UniversityBeijing100871China

Donor-acceptor(D-A)conjugated polymers comprising electron-deficient aromatic dicarboximide units represent an important type of organic semiconductors,especially for electron transporting ***-1,5,6,10-tetracarboxyl diimide(PyDI),a new PAH dicarboximide molecule recently reported by us,provides a fine balance between the electron-stabilizing ability andπ-stacking tendency,as compared to the naphthalenediimide(NDI)and perylenediimide(PDI)*** this study,using thienylene-vinylene-thienylene(TVT)and biselenophene(BS)as the electron donating comonomer,along with PyDI as the acceptor moiety,we develop two new D-A type conjugated polymers,which exhibit impressive electron-transporting ***,in the solution-processed OFET devices,electron mobility of 0.18 and 0.20 cm^(2)·V^(−1)·s^(−1) are achieved with these polymers,*** findings further prove the optimal potential of PyDI for application as an electron-acceptor building block in the development of polymeric n-type semiconductors among all various high-performance functional D-A polymers.

关键词： Pyrenedimide Conjugated polymers Donor-acceptor Organic electronics

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Phase Stability,Magnetic Properties,and Martensitic Transformation of Ni_(2−x)Mn_(1+x+y)Sn_(1−y) Heusler Alloy with Excess Mn by First‑Principles Calculations

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Acta Metallurgica Sinica(English Letters) 2023年第3期36卷 513-528页

作者： Yu Zhang Jing bai Ziqi Guan Xinzeng liang Yansong li Jianglong Gu Yudong Zhang Claude Esling Xiang Zhao liang Zuo Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang 110819China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province School of Resources and MaterialsNortheastern University at QinhuangdaoQinhuangdao 066004PR China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China Laboratoire d’Etude des Microstructures et de Mecanique des Materiaux UMR 7239LEM3CNRSUniversity of Lorraine57045 MetzFrance

The phase stability,magnetic properties,martensitic transformation,and electronic properties of the Ni_(2−x)Mn_(1+x+y)Sn_(1−y) system with excess Mn have been systematically investigated by the first-principles *** indicate that the excess Mn atoms will directly occupy the sublattices of Ni(MnNi)or Sn(MnSn).The formation energy(Ef)of the austenite has a relationship with the Mn content:Ef=135.27(1+x+y)−293.01,that is,the phase stability of the austenite decreases gradually with the increase in Mn *** to the results of the formation energy of austenite,there is an antiparallel arrangement of the magnetic moment between the excess and normal Mn atoms in the Ni_(2−x)Mn_(1+x+y)Sn_(1−y)(x=0 or y=0)system,while the magnetic moment direction of the normal Mn atoms arranges antiparallel to that of MnNi atoms and parallel to that of MnSn atoms in the Ni_(2−x)Mn_(1+x+y)Sn_(1−y)(x,y≠0)*** martensitic transformation occurs in some Ni_(2−x)Mn_(1+x+y)Sn_(1−y)(x,y≠0)alloys with large magnetic moments of ferrimagnetic ***,the valence electrons tend to distribute around the Ni or MnNi atoms and mainly bond with the normal Mn *** results of this work can lay a theoretical foundation for further development of the Ni_(2−x)Mn_(1+x+y)Sn_(1−y) system as the potential ferromagnetic shape memory alloys.

关键词： Ni-Mn-Sn First-principles calculations Phase stability Magnetic property Martensitic transformation

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Amine-functionalized hierarchically porous carbon supported Pd nanocatalysts for highly efficient H2 generation from formic acid with fast-diffusion channels

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Journal of Energy Chemistry 2023年第1期76卷 249-258,I0007页

作者： Xianzhao Shao Xinyi Miao Fengwu Tian Miaomiao bai Xiaosha Guo Wei Wang Zuoping Zhao Xiaohui Ji Miyi li Fangan Deng Shaanxi Key Laboratory of Catalysis School of Chemistry and Environment ScienceShanxi University of TechnologyHanzhong 723001ShaanxiChina School of Mathematics and Computer Science Shanxi University of TechnologyHanzhong 723001ShaanxiChina State Key Laboratory of Qinba Bio-Resource and Ecological Environment Shaanxi University of TechnologyHanzhong 723001ShaanxiChina School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 102488China

Formic acid(FA)has come to be considered a potential candidate for hydrogen storage,and the development of efficient catalysts for H2releasing is crucial for realizing the sustainable process from ***,we have developed the ultrafine Pd nanoparticle(NPs)with amine-functionalized carbon as a support,which was found to show an excellent catalytic activity in H_(2)generation from FA *** synergetic mechanism between amine-group and Pd active site was demonstrated to facilitate H2generation byβ-hydride ***,the texture of support for Pd NPs also plays an important role in determining the reactivity of FA,since the diffusion of gaseous products makes the kinetics of diffusion as a challenge in this high performance Pd *** a result,the as-prepared Pd/NH_(2)-TPC catalyst with the small sized Pd nanoparticles and the hierarchically porous structures shows a turnover of frequency(TOF)value of 4312 h^(-1)for the additive-free FA dehydrogenation at room temperature,which is comparable to the most promising heterogeneous *** results demonstrated that the intrinsic catalytic activities of active site as well as the porous structure of support are both important factors in determining catalytic performances in H2generation from FA dehydrogenation,which is also helpful to develop high-activity catalysts for other advanced gas-liquid-solid reactions systems.

关键词： Hierarchically carbon Diffusion Formic acid Hydrogen production Palladium nanoparticles

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3D printed porous titanium filled with mineralized UV-responsive chitosan hydrogel promotes cell proliferation and osteogenesis in vitro

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Journal of Materials Science & Technology 2023年第11期142卷 34-44页

作者： Jiazhao Yang Fan liu Changshun Zhou Hejie li Gaolin Yang Shiyuan Fang In-Seop Lee Yi liu Hao bai Cen Chen The First Affiliated Hospital of USTC Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230001China Department of Orthodontics School of StomatologyChina Medical UniversityShenyang 110002China College of life Sciences and Medicine Zhejiang Sci-Tech UniversityHangzhou 310018China Institute of Laser Advanced Manufacturing Zhejiang University of TechnologyHangzhou 310023China Institute of Human Materials Suwon 16514Republic of Korea State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine Hangzhou 310018China

The modification of 3D printed porous titanium(Ti),especially for the internal pore structure,is critical and has received more attention to promoting its osteogenesis for clinical ***-violet(UV)responsive chitosan(CSMA),as an injectable filling material,was firstly incorporated into porous Ti,and then CSMA was in-situ mineralized by carbon oxide(CO_(2))diffusion(CSMA/CaCO_(3)).Their physical-chemical and biological properties were investigated in ***_(3) crystals within CSMA hydrogels were successfully deposited into pores of porous Ti,which exhibited favorable *** implants filled with CSMA/CaCO_(3) promoted adhesion and proliferation of bone mesenchymal stem cells(BMSCs).Moreover,Ti implant filled CSMA/CaCO_(3) hydrogels could increase alkaline phosphatase(ALP)activities,up-regulate osteopontin(OPN)and osteocalcin(OCN)expression levels,and enhance extracellular mineralization.3D printed porous Ti filled with mineralized UV-responsive chitosan hydrogel could promote proliferation and osteogenesis of BMSCs,and have great potential for the modification of porous Ti implants in bone tissue engineering.

关键词： Porous titanium Chitosan Ultraviolet(UV)-responsive Mineralization Osteogenesis

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三种电动势法求解难溶盐溶度积的对比

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海南热带海洋学院学报 2024年第5期31卷 144-148页

作者：屈军艳白燕罗肖雪黎瑞珍韩海军海南热带海洋学院理学院海南三亚572022 海南热带海洋学院食品科学与工程学院海南三亚572022

溶度积(■)的大小反映了难溶电解质的溶解能力,在判断沉淀的生成、溶解、转化等化学过程中有广泛的应用。介绍了3种求解难溶盐AgCl(s)溶度积■的电动势法:电池平衡法、本质电极反应相同法以及标准电极电势定义法。通过求解公式的推导,... 详细信息

溶度积(■)的大小反映了难溶电解质的溶解能力,在判断沉淀的生成、溶解、转化等化学过程中有广泛的应用。介绍了3种求解难溶盐AgCl(s)溶度积■的电动势法:电池平衡法、本质电极反应相同法以及标准电极电势定义法。通过求解公式的推导,对比了这3种方法在求解难溶盐溶度积时所需的原理、教学难易、拓展难易等方面的差异,给出了教材安排此部分内容的合理建议:电池平衡法更适合初学者,教材应首先安排电池平衡法及其例题讲解;在此基础上,可适当介绍电极电势法,尤其是本质电极反应相同法及其例题解析。3种方法的对比结果为方便学生对此部分内容的学习提供重要参考,尤其有利于提高和扩展应用型本科院校化学相关专业学生的知识层次。

关键词：电动势法溶度积能斯特方程物理化学教材安排

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