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Inclusion of CoTiO_(3) to ameliorate the re/dehydrogenation properties of the Mg–Na–Al system

Journal of Magnesium and Alloys 2024年第3期12卷 1215-1226页

作者： N.A.Ali N.Y.Yusnizam N.A.Sazelee Sami-ullah Rather haizhen liu M.Ismail Energy Storage Research Group Faculty of Ocean Engineering TechnologyUniversiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia Department of Chemical and Materials Engineering King Abdulaziz UniversityP.O.Box80204Jeddah 21589Saudi Arabia Guangxi Novel Battery Materials Research Center of Engineering Technology School of Physical Science and TechnologyGuangxi UniversityNanning 530004China State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures Nanning 530004China

For the first time,the MgH_(2)–NaAlH_(4)(ratio 4:1)destabilized system with CoTiO_(3) addition has been *** CoTiO_(3)-doped MgH_(2)–NaAlH_(4) sample begins to dehydrogenate at 130℃,which is declined by 40℃ compared to the undoped MgH_(2)–NaAlH_(4).Moreover,the de/rehydrogenation kinetics characteristics of the CoTiO_(3)-doped MgH_(2)–NaAlH_(4) were greatly *** the inclusion of CoTiO_(3),the MgH_(2)–NaAlH_(4) composite absorbed 5.2 wt.%H_(2),higher than undoped MgH_(2)–NaAlH_(4).In the context of dehydrogenation,the CoTiO_(3)-doped MgH_(2)–NaAlH_(4) sample desorbed 2.6 wt.%H_(2),almost doubled compared to the amount of hydrogen desorbed from the undoped MgH_(2)–NaAlH_(4) *** activation energy obtained by the Kissinger analysis for MgH_(2) decomposition was significantly lower by 35.9 kJ/mol than the undoped MgH_(2)–NaAlH_(4) *** reaction mechanism demonstrated that new phases of MgCo and AlTi_(3) were generated in situ during the heating process and are likely to play a substantial catalytic function and be useful in ameliorating the de/rehydrogenation properties of the destabilized MgH_(2)–NaAlH_(4) system with the inclusion of CoTiO_(3).

关键词： Destabilize system Magnesium hydride Sodium alanate Hydrogen storage Additive.

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樱桃树细长纺锤形的培养及修剪技术

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果树资源学报 2024年第5期5卷 53-54页

作者：刘海桢陕西省咸阳兴平市园艺站陕西咸阳713100

细长纺锤形因成形快、操作简单、易丰产稳产而在国内外樱桃栽培中被广泛应用。根据近几年来对樱桃树细长纺锤形的研究及修剪经验,提出春栽定干和不定干两种情况下樱桃树细长纺锤形的培养及修剪技术。

关键词：樱桃细长纺锤形培养修剪技术

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广西职业教育人才供给与产业需求契合度评测体系研究

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市场周刊 2024年第13期37卷 162-165页

作者：李晟刘海真广西师范大学广西桂林541001 北京新动力人才创新研究院北京100010

职业教育在服务产业和社会发展中作用突出,但现阶段人才与产业需求不平衡问题突出。探讨广西职业教育人才供给与产业需求之间的契合度,有助于促进广西职业教育改革和产业创新发展。通过评测体系的预测以及产教融合的深入,为职业学校和... 详细信息

职业教育在服务产业和社会发展中作用突出,但现阶段人才与产业需求不平衡问题突出。探讨广西职业教育人才供给与产业需求之间的契合度,有助于促进广西职业教育改革和产业创新发展。通过评测体系的预测以及产教融合的深入,为职业学校和产业发展提供前瞻性指导,为职业教育人才培养提出新思路,为产业人才队伍建设提出可行的路径。

关键词：广西职业教育人才供给产业需求评测

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Localization of orphan receptor TR3 mRNA in early developmental follicles in rat

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Chinese Science Bulletin 2000年第12期45卷 1122-1127页

作者： haizhen liu Yixun liu Chinese Acad Sci Inst Zool State Key Lab Reprod Biol Beijing 100080 Peoples R China

By in situ hybridization, the localization of orphan receptor TR3 mRNA has been observed in early developmental follicles. TR3 mRNA is first expressed in the ovarian interstitial cells on day 2 after birth, and then in granulosa cells (GC) in primary follicles on day 4. The expression level of TR3 mRNA in GC increases following the follicular development. Its higher expression can be observed in the outer layer of GC and inner layer of theca cells (TC) on day 6, where the cells present active proliferation and differentiation. The expression of TR3 is in an increasing manner until the large antral follicles on day 30. The mRNA is only expressed in the healthy, but not atretic follicles in adult rat ovaries. Injection of epidermal growth factor (EGF) has dramatically enhanced its expression in the early stage of developmental follicles. It is therefore suggested that TR3 may play a role in regulating growth and differentiation of ovarian somatic cells in the early stage, and its expression is regulated

关键词： orphan receptor TR3 in situ hybridization follicular development granulosa cells epidermal growth factor.

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Multi-objective Stability Control Algorithm of Heavy Tractor Semi-trailer Based on Differential Braking

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Chinese Journal of Mechanical Engineering 2012年第1期25卷 88-97页

作者： ZONG Changfu ZHU Tianjun WANG Chang liu haizhen State Key Laboratory of Automobile Dynamic Simulation Jilin UniversityChangchun 130025China Department of Mechanical and Electric Engineering Hebei Engineering UniversityHandan 056021China

Rollover and jack-knifing of tractor semi-trailer are serious threats for vehicle safety, and accordingly active safety technologies have been widely used to reduce or prevent the occurrence of such accidents. However, currently tractor semi-trailer stability control is generally only a single hazardous condition (rollover or jack-knifing) control, it is difficult to ensure the vehicle comprehensive stability of various dangerous conditions. The main objective of this study is to introduce a multi-objective stability control algorithm which can improve the vehicle stability of a tractor semi-trailer by using differential braking. A vehicle controller is designed to minimize the likelihood of rollover and jack-knifing. First a linear vehicle model of tractor semi-trailer is constructed. Then an optimal yaw control for tractor using differential braking is applied to minimize the yaw rate and lateral acceleration deviation of tractor, as well as the hitch articulation angle of tractor semi-trailer, so as to improve the vehicle stability. Second a braking scheme and variable structure control with sliding mode control are introduced in order to achieve the best braking effect. Last Fishhook maneuver is introduced to the active safety simulation and the active control system effect verification. The simulation results show that multi-objective stability control algorithm of semi-trailer could improve the vehicle stability significantly during the transient maneuvers. The proposed multi-objective stability control algorithm is effective to prevent the vehicle rollover and jackknifing.

关键词： rollover jack-knifing tractor semi-trailer multi-objective stability control

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抗血小板聚集药和他汀类药物联合治疗急性缺血性脑卒中临床疗效

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深圳中西医结合杂志 2024年第3期34卷 108-110页

作者：吴荔嘉刘玉姗刘海珍厦门市海沧医院福建厦门361026

目的:探究急性缺血性脑卒中的抗血小板聚集药和他汀类药物联合治疗的临床效果。方法:回顾性选择2018年1月至2020年6月于厦门市海沧医院治疗的急性缺血性脑卒中患者80例作为研究对象,根据其采用的不同治疗方法进行分组,将采用常规抗血小... 详细信息

目的:探究急性缺血性脑卒中的抗血小板聚集药和他汀类药物联合治疗的临床效果。方法:回顾性选择2018年1月至2020年6月于厦门市海沧医院治疗的急性缺血性脑卒中患者80例作为研究对象,根据其采用的不同治疗方法进行分组,将采用常规抗血小板聚集药治疗的患者纳入对照组(40例),将采用抗血小板聚集药联合他汀类药物治疗的患者纳入观察组(40例),观察和比较两组患者治疗前、治疗1个月后血液流变学指标、血脂水平和不良反应发生率。结果:两组患者治疗后全血黏度、血浆黏度、血栓长度均有不同程度下降,且治疗后观察组患者全血黏度、血浆黏度、血栓长度均低于对照组,差异具有统计学意义(P0.05)。结论:相比单一用药治疗,采用抗血小板聚集药联合他汀类药物治疗急性缺血性脑卒中的临床效果较佳,可改善患者血液流变学,降低血脂水平,还具有安全性。

关键词：急性缺血性脑卒中抗血小板聚集药他汀类药物

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苯基取代苯并二噻吩二酮构建新型聚合物及其光伏性能研究

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化学学报 2024年第3期82卷 257-264页

作者：邓燧楠刘海珍张连杰罗文君罗妹张泽升梁嘉豪王新康陈军武华南理工大学高分子光电材料与器件研究所发光材料与器件国家重点实验室广州510640

随着材料和器件的不断发展,有机光伏(OPV)的器件效率不断提升,但制备仍存在较多额外加工工艺,不利于其大规模生产.如何合理调控活性层材料的溶解性、结晶性和两相形貌来简化器件制备工艺,实现高性能的as-cast器件将十分具有科学意义.本... 详细信息

随着材料和器件的不断发展,有机光伏(OPV)的器件效率不断提升,但制备仍存在较多额外加工工艺,不利于其大规模生产.如何合理调控活性层材料的溶解性、结晶性和两相形貌来简化器件制备工艺,实现高性能的as-cast器件将十分具有科学意义.本工作通过设计合成苯基取代的苯并二噻吩二酮单元(二维BDD)作为共聚单元,制备了三种新型聚合物材料.当二维BDD单元摩尔分数为10%时, FBDT-m10能实现良好的聚集性能和加工性能,与Y6-BO共混制备的as-cast器件就可以得到良好的活性层形貌,最终实现了71.14%的填充因子及16.06%的器件效率.

关键词：芳香取代苯并二噻吩二酮聚合物给体有机太阳电池

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Aluminum hydride for solid-state hydrogen storage:Structure,synthesis, thermodynamics, kinetics, and regeneration

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Journal of Energy Chemistry 2021年第1期30卷 428-440,I0014页

作者： haizhen liu Longfei Zhang Hongyu Ma Chenglin Lu Hui Luo Xinhua Wang Xiantun Huang Zhiqiang Lan Jin Guo Guangxi Novel Battery Materials Research Center of Engineering Technology Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured MaterialsGuangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related TechnologySchool of Physical Science and TechnologyGuangxi UniversityNanning 530004GuangxiChina State Key Laboratory of Silicon Materials School of Materials Science&EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina Department of Materials Science and Engineering Baise CollegeBaise 533000GuangxiChina

Aluminum hydride(AlH3) is a binary metal hydride that contains more than 10.1 wt% of hydrogen and possesses a high volumetric hydrogen density of 148 kg H2 m^(-3).Pristine AlH3 can readily release hydrogen at a moderate temperature below 200℃.Such high hydrogen density and low desorption temperature make AlH3 one of most promising hydrogen storage media for mobile *** review covers the research activity on the structures,synthesis,decomposition thermodynamics and kinetics,regeneration and application validation of AlH3 over the past ***,the future research directions of AlH3 as a hydrogen storage material will be revealed.

关键词： Hydrogen storage Aluminum hydride AlH3 Research progress Application

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Two-dimensional vanadium carbide for simultaneously tailoring the hydrogen sorption thermodynamics and kinetics of magnesium hydride

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Journal of Magnesium and Alloys 2022年第4期10卷 1051-1065页

作者： Chenglin Lu haizhen liu Li Xu Hui Luo Shixuan He Xingqing Duan Xiantun Huang Xinhua Wang Zhiqiang Lan Jin Guo Guangxi Novel Battery Materials Research Center of Engineering Technology Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured MaterialsGuangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related TechnologySchool of Physical Science and TechnologyGuangxi UniversityNanning530004China State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute Co.Ltd.Beijing102209China Department of Materials Science and Engineering Baise CollegeBaise533000GuangxiChina Department of Materials Science and Engineering Zhejiang UniversityHangzhou310027China

Magnesium hydride(MgH_(2))is a potential material for solid-state hydrogen ***,the thermodynamic and kinetic properties are far from practical application in the current *** this work,two-dimensional vanadium carbide(V_(2)C)MXene with layer thickness of 50−100 nm was fist synthesized by selectively HF-etching the Al layers from V_(2)AlC MAX phase and then introduced into MgH_(2) to improve the hydrogen sorption performances of MgH_(2).The onset hydrogen desorption temperature of MgH_(2) with V_(2)C addition is significantly reduced from 318℃ for pure MgH_(2) to 190℃,with a 128℃ reduction of the onset *** MgH_(2)+10 wt%V_(2)C composite can release 6.4 wt%of H_(2) within 10 min at 300℃ and does not loss any capacity for up to 10 *** activation energy for the hydrogen desorption reaction of MgH_(2) with V_(2)C addition was calculated to be 112 kJ mol^(−1) H_(2) by Arrhenius’s equation and 87.6 kJ mol^(−1) H_(2) by Kissinger’s *** hydrogen desorption reaction enthalpy of MgH_(2)+10 wt%V_(2)C was estimated by van’t Hoff equation to be 73.6 kJ mol^(−1) H_(2),which is slightly lower than that of the pure MgH_(2)(77.9 kJ mol^(−1) H_(2)).Microstructure studies by XPS,TEM,and SEM showed that V_(2)C acts as an efficient catalyst for the hydrogen desorption reaction of MgH_(2).The first-principles density functional theory(DFT)calculations demonstrated that the bond length of Mg−H can be reduced from 1.71A for pure MgH_(2) to 2.14A for MgH_(2) with V_(2)C addition,which contributes to the destabilization of MgH_(2).This work provides a method to significantly and simultaneously tailor the hydrogen sorption thermodynamics and kinetics of MgH_(2) by two-dimensional MXene materials.

关键词： Hydrogen storage MgH_(2) V_(2)C Catalyst DFT

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Facile synthesis of a Ni_(3)S_(2)@C composite using cation exchange resin as an efficient catalyst to improve the kinetic properties of MgH_(2)

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Journal of Magnesium and Alloys 2022年第12期10卷 3628-3640页

作者： Liang Zeng Zhiqiang Lan Baobao Li Huiren Liang Xiaobin Wen Xiantun Huang Jun Tan haizhen liu Wenzheng Zhou Jin Guo Guangxi Novel Battery Materials Research Center of Engineering Technology Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related TechnologySchool of Physical Science and TechnologyGuangxi UniversityNanning530004PR China School of Materials Science and Engineering Baise UniversityBaise533000PR China National Engineering Research Center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing400044PR China

Carbon materials have excellent catalytic effects on the hydrogen storage performance of MgH2. Here, carbon-supported Ni3S2(denoted as Ni3S2@C) was synthesized by a facile chemical route using ion exchange resin and nickel acetate tetrahydrate as raw materials and then introduced to improve the hydrogen storage properties of MgH2. The results indicated the addition of 10 wt.% Ni3S2@C prepared by macroporous ion exchange resin can effectively improve the hydrogenation/dehydrogenation kinetic properties of MgH2. At 100 ℃,the dehydrogenated MgH2-Ni3S2@C-4 composite could absorb 5.68 wt.% H2. Additionally, the rehydrogenated MgH2-Ni3S2@C-4 sample could release 6.35 wt.% H2at 275 ℃. The dehydrogenation/hydrogenation enthalpy changes of MgH2-Ni3S2@C-4 were calculated to be 78.5 k J mol-1/-74.7 k J mol-1, i.e., 11.0 k J mol-1/7.3 k J mol-1lower than those of MgH2. The improvement in the kinetic properties of MgH2was ascribed to the multi-phase catalytic action of C, Mg2Ni, and Mg S, which were formed by the reaction between Ni3S2contained in the Ni3S2@C catalyst and Mg during the first hydrogen absorption–desorption process.

关键词： Magnesium Hydrogen storage performance Catalytic effect Carbon-based catalyst

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