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Chemical Research in Chinese Universities 2024年第1期40卷 55-63页

作者： WANG Tingting WANG Jia XI Yongjie HU Bin li fuwei State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China

Selective activation of C-O bond is of fundamental importance in the precise conversion of oxygenates into value-added compounds in an atom-economic and sustainable manner, and meanwhile, the structurally well-defined dual-atoms catalysts (DACs) have been scarcely investigated in this field. In this study, a series of transition metal DACs anchored on nitrogen-doped graphene (TM2/NC, TM=Pt, Ir, Rh, Pd, Ru, Co, Ni and Cu) was constructed to make a comprehensive investigation of their selectivity in the hydrogenative transformation of furfuryl alcohol (FAL), an important biomass platform molecule, to 1,2-pentanediol (1,2-PeD) via selective cleavage of furanic C5-O bond, by density functional theory (DFT) calculations and microkinetic modeling. We found that Ir2/NC demonstrated a high selectivity for the cleavage of furanic C5-O bond to produce 1,2-PeD, while the production of THFAL or 1,5-pentanediol (1,5-PeD) on other TM2/NC catalysts are more favorable. Furthermore, we found that the selective C-O bond cleavage of FAL furan ring is affected by the orbital overlap between the d-orbitals of the anchored metal atoms and the p-orbitals of the adsorbed C atom in FAL, suggesting that the selectivity of the C-O bond cleavage is inextricably related with the electronic property of the anchored metals.

关键词： Furfuryl alcohol Hydrogenation Dual-atom catalyst Density functional theory(DFT)calculation

Green synthesis of ZSM-5 using silica fume and catalytic co-cracking of lignin and plastics for production of monocyclic aromatics

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Chinese Journal of Chemical Engineering 2024年第1期65卷 92-105页

作者： Hongbing Fu Yufei Gu Tianhua Gao fuwei li Hengshuo Gu Hucheng Ge Yuke liu Zhixia li Hongfei lin Jiangfei Cao School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004China Guangxi Bossco Environmental Protection Technology Co. Ltd.Nanning 530007China School of Environmental and Chemical Engineering Zhaoqing UniversityZhaoqing 526000China

ZSM-5 with hierarchical pore structure was synthesized by a simple two-step hydrothermal crystallization from silica fume without using any organic ammonium *** synthesized ZSM-5 were oval shaped particles with a particle size about 2.0 μm and weak acid-dominated with proper Brønsted(B)and Lewis(L)acid *** ZSM-5 was used for catalytic co-cracking of n-octane and guaiacol,lowdensity polyethylene(LDPE)and alkali lignin(AL)to enhance the production of benzene,toluene,ethylbenzene and xylene(BTEX).The most significant synergistic effect occurred at n-octane/guaiacol at 1:1 and LDPE/AL at 1:3,under the condition,the achieved BTEX selectivity were 24%and 33%(mass)higher than the calculated values(weighted average).The highest BTEX selectivity reached 88.5%,which was 3.7%and 54.2%higher than those from individual cracking LDPE and *** synthesized ZSM-5 exhibited superior catalytic performance compared to the commercial ZSM-5,indicating potential application prospect.

关键词： Silica fume ZSM-5 Catalytic co-cracking Plastics lignin

Mitigating the negative catalytic effect of CuO by FAS-17 coated Al nanopowder:Isothermal ageing of Al/CuO nanothermite at 71°C and 60%relative humidity

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Defence Technology（防务技术） 2024年第4期34卷 156-167页

作者： fuwei li Qian Wang Jian Cheng Zehua Zhang Yuxuan Zhou Keer Ouyang Jianbing Xu Yinghua Ye Ruiqi Shen School of Chemistry and Chemical Engineering Nanjing University of Science&TechnologyNanjing 210094China Micro-Nano Energetic Devices Key Laboratory Ministry of Industry and Information TechnologyNanjing 210094JiangsuChina Institute of Space Propulsion Nanjing University of Science and TechnologyNanjing 210094China

The safety and reliability of weapon systems would be significantly affected by changes in the performance of energetic materials due to ambient temperature and *** have promising applications due to their excellent *** it becomes extremely important to understand their aging and failure process in the environment before using ***,the aging and failure process of Al/CuO in 71°C/60%RH were investigated,and showed that CuO nanoparticles negatively catalyze Al nanopowders,resulting in rapid *** anti-aging effect of FAS-17-coated Al nanopowder was also *** aging process of Al,Al/CuO,and Al@FAS-17/CuO in high humidity and heat environment were revealed by quasi-in situ SEM and TEM *** with the aging of pure Al,the Al nanopowder in the nanothermites strongly agglomerated with the CuO nanopowder and hydrated *** may be caused by CuO catalyzed hydration of Al *** energy release experiments showed that the performance of Al/CuO decreased rapidly and failed to ignite after 4 h of *** contrast,the Al@FAS-17/CuO thermite can achieve long-term stability of up to 60 h in the same environment by simple cladding of *** is found that FAS-17 coated Al nanopowder can prevent both particle agglomeration and water erosion,which is an effective means to make nanothermites application in high humidity and heat environment.

关键词： Al/CuO nanothermite FAS-17 coating Aging and failure process

齐拉西酮联合阿立哌唑对老年痴呆患者血脂和认知功能的影响

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航空航天医学杂志 2024年第8期35卷 912-913,976页

作者：李付伟南阳市第四人民医院精神十二科河南南阳473000

目的探究齐拉西酮联合阿立哌唑对老年痴呆(Alzheimer′s disease,AD)患者血脂和认知功能的影响。方法按随机数字表法将2020年03月-2023年03月在南阳市第四人民医院接受治疗的92例老年AD患者,随机分成两组。其中,对照组(n=46)给予齐拉西... 详细信息

目的探究齐拉西酮联合阿立哌唑对老年痴呆(Alzheimer′s disease,AD)患者血脂和认知功能的影响。方法按随机数字表法将2020年03月-2023年03月在南阳市第四人民医院接受治疗的92例老年AD患者,随机分成两组。其中,对照组(n=46)给予齐拉西酮进行治疗;观察组(n=46)给予齐拉西酮联合阿立哌唑进行治疗,持续治疗8周。对比两组临床疗效、血脂水平、认知功能,并统计不良反应发生情况。结果观察组有效率显著较对照组高(P0.05)。观察组治疗后蒙特利尔认知评估量表评分较对照组高(P0.05)。结论齐拉西酮联合阿立哌唑治疗老年AD患者,能提高治疗效果,改善患者认知功能水平,对患者血脂代谢影响较低,且安全性较高。

关键词：老年痴呆齐拉西酮阿立哌唑血脂认知功能

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专项债支持的智慧路灯项目研究

照明工程学报 2024年第1期35卷 153-157页

作者：李应飞李付伟卢阳上海五零盛同信息科技有限公司上海市200331

汇总并分析专项债支持的智慧路灯项目,得出地方政府专项债对于智慧路灯项目有重要促进作用,且呈现发行期限变长、利率持续下降以及发行节奏前置的趋势的主要结论。对比各项目披露的“一案两书”等材料,发现支持智慧路灯领域的专项债发... 详细信息

汇总并分析专项债支持的智慧路灯项目,得出地方政府专项债对于智慧路灯项目有重要促进作用,且呈现发行期限变长、利率持续下降以及发行节奏前置的趋势的主要结论。对比各项目披露的“一案两书”等材料,发现支持智慧路灯领域的专项债发行过程存在信息披露不透明、夸大经营收入、监管机制不到位等问题。对比分析经营项目收入数据,发现智慧路灯项目总体盈利水平不高,且过于依赖基于LED屏幕的广告服务收入,有较大的还本付息压力。针对发行过程中存在的问题,提出细化审核标准、提高审核要求、拓宽专项债券销售渠道、丰富投资者结构的建议;针对智慧路灯项目经营上的问题,提出扩大特许经营范围、健全组织协调机制机构的建议。

关键词：智慧路灯专项债投资运营

Palladium-Catalyzed Tandem Carbonylative Aza-Wacker-Type Cyclization of Nucleophile Tethered Alkene to Access Fused N-Heterocycles

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Chinese Journal of Chemistry 2021年第2期39卷 317-322页

作者： lijun Shi Mingshan Wen fuwei li State Key Laboratory for Oxo Synthesis and Selective Oxidation Suzhou Research Institute of LICPLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhouGansu730000 China University of the Chinese Academy of Sciences Beijing100049 China

Although tandem reactions offer rapid access to structurally complex molecules in one-pot reaction,the selectivity issue needs to be addressed particularly when incompatible step reactions are ***,we report the selective synthesis of fused N-heterocycles from nucleophile-tethered alkenylamide and carbon monoxide via palladium(Pd)-catalyzed tandem carbonylative aza-Wacker-type *** electron-deficient nature of amide N—H and the intramolecular coordination of Pd with alkene accelerate the aminopalladation and effectively prevent the side oxidative carbonylation of diamine moiety to form *** is also found that the reported acyl Pd chloride intermediate may not be involved in this tandem *** work not only provides an efficient synthetic route to fused 1,4-diazepanones and 1,4-diazepanes but also inspires further development of tandem reactions for the diverse synthesis of heterocycles.

关键词： Palladium Carbonylation Heterocycles Alkenes Tandem reaction

Enhanced room temperature magnetoresistance in maganites La_(0.60)Sr_(0.25-y)Na_(0.15)Δ_yMnO_(31)

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Rare Metals 2006年第Z1期25卷 515-520页

作者： TANG Guide ZHAO fuwei li Zhuangzhi HOU Denglu ZHAO Xu li Zhiqing Department of Physics Hebei Normal University Shijiazhuang 050016 China Department of Physics Hebei Normal University Shijiazhuang 050016 China Department of Physics Hebei Normal University Shijiazhuang 050016 China Department of Physics Hebei Normal University Shijiazhuang 050016 China Department of Physics Hebei Normal University Shijiazhuang 050016 China Department of Applied PhysicsSchool of ScienceTianjin UniversityTianjin 300072China

Bulk polycrystalline samples of La0.60Sr0.4MnO3 and La0.60Sr0.25-yNa0.15ΔyMnO3 with 0.00≤y≤0.15 (“Δ” representing cation vacancy) were successfully synthesized using the sol-gel method. The structural, magnetic, and electrical properties of the polycrystalline of the samples were investigated. The results of X-ray powder diffraction patterns show that these compounds crystallize in a distorted rhombohedral structure with the space group R3C. The measurement shows that, with vacancy content y increasing, the unit cell volume V of samples increases, furthermore, the Curie temperature TC decreases. The temperature dependence of resistivity shows that all samples undergo a metal-semiconductor transition accompanying a ferromagnetic to paramagnetic transition with the increase of temperature. Under an applied filed of 1.8 T, a maximum room temperature magnetoresistance (MR) of 20% is obtained at 293 K for the compound La0.60Sr0.1Na0.15Δ0.15MnO3. The MR peak value of La0.60Sr0.1Na0.15Δ0.15MnO3 increases 2 times more than that of La0.60Sr0.40MnO3 (MRP=6.4%, TMR=373 K), and the MR peak is shifted from 373 K to room temperature.

关键词： perovskite manganite sol-gel method magnetoresistance crystal structure magnetic property

Shear behaviour of a rock bridge sandwiched between incipient joints under the influence of hydraulic pressures

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International Journal of Mining Science and Technology 2023年第2期33卷 233-242页

作者： Shicheng Wang Xuxu Yang lichao li Panpan Sun Lei Yang fuwei li Shandong Key Laboratory of Civil Engineering Disaster Prevention and Mitigation Shandong University of Science and TechnologyQingdao 266590China School of Civil Engineering and Architecture Shandong University of Science and TechnologyQingdao 266590China

The rock bridges sandwiched in incipiently jointed rock mass were considered as barriers that block the fluid seepage,and provide certain shear strength *** better revealing the influence of hydraulic pressure on the failure behaviour of rock bridges,direct shear tests were carried out through a newly proposed method on rock samples that contain two parallel incipient *** developing the gypsum-silicone pad coupling samples,a conventional triaxial test system was qualified to implement direct shear tests with satisfied sealing *** results showed that the rock bridges could be failed through the tensile failure,shear failure and mixed failure *** hydraulic pressure would facilitate the tensile failure mechanism and induce rougher fracture surfaces;while the normal stress would facilitate the shear failure mechanism and induce less rough *** hydraulic pressure reduced the global shear strength of the rock block through reducing the efficient normal stress applied on the rock bridge area,which was highly dependent on the joint persistence,***,because of the iterating occurrence of the hydraulic pressure lag with the fracture propagation,the rock bridge failure stage in the shear stress-shear displacement curves displayed a fluctuation trend.

关键词： Direct shear tests Hydraulic pressure Rock bridge Failure mechanism Hydraulic pressure lag Rock joints

3种鸡源乳酸菌抑制大肠杆菌生物被膜形成的比较研究

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山东农业科学 2024年第7期56卷 148-153页

作者：赵桂省庞天津陈甫刘玮李福伟邱慧玲济南市畜牧技术推广站山东济南250306 青岛农业大学海都学院山东莱阳265200 青岛农业大学动物医学院山东青岛266109 山东省农业科学院家禽研究所/济南市家禽种质创新与健康养殖重点实验室山东济南250100

试验旨在研究鼠李糖乳杆菌、戊糖片球菌和口乳杆菌3种鸡源乳酸菌对大肠杆菌生物被膜生成的影响。利用置片法对供试菌株培养48 h,定性观察细菌生长与生物被膜的形成;利用96孔微板法定量检测4种细菌生长的OD_(590)值,评价抑制生物被膜生... 详细信息

试验旨在研究鼠李糖乳杆菌、戊糖片球菌和口乳杆菌3种鸡源乳酸菌对大肠杆菌生物被膜生成的影响。利用置片法对供试菌株培养48 h,定性观察细菌生长与生物被膜的形成;利用96孔微板法定量检测4种细菌生长的OD_(590)值,评价抑制生物被膜生成的效果。结果表明,大肠杆菌培养12 h开始形成生物被膜,24 h形成典型的生物被膜,并伴有交织链接的生物被膜骨架;3种乳酸菌培养36 h均未见生物被膜骨架,OD_(590)值显示鼠李糖乳杆菌生物被膜厚度优于戊糖片球菌、口乳杆菌。与大肠杆菌共培养发现,3种乳酸菌全菌液和上清液均能显著抑制大肠杆菌生物被膜的生成,抑制效果鼠李糖乳杆菌>口乳杆菌>戊糖片球菌。结果可为探索乳酸菌拮抗大肠杆菌感染机制提供参考。

关键词：鼠李糖乳杆菌戊糖片球菌口乳杆菌大肠杆菌生物被膜形成

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Magnetically Separable and Versatile Pd/Fe3O4 Catalyst for Efficient Suzuki Cross-Coupling Reaction and Selective Hydrogenation of Nitroarenes

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Chinese Journal of Chemistry 2011年第3期29卷 525-530页

作者： Zhang, Rongzhao liu, Jianming li, fuwei Wang, Shoufeng Xia, Chungu Sun, Wei State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou Gansu 730000 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Magnetic nanoparticle-supported Pd/Fe3O4 was readily prepared and proved to be versatile catalyst for efficient Suzuki cross-coupling reaction, and the reduction of nitroarenes under mild conditions （balloon H2 pressure and room temperature）. The catalyst could be conveniently recovered and reused several times with sustained catalytic activity.

关键词： nanoparticles Fe3O4 supported catalyst Suzuki coupling reaction reduction