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Low-cost and fluoride-free synthesis of MFI zeolite nanosheets with enhanced stability for benzene alkylation with ethanol

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Journal of Energy Chemistry 2025年第1期100卷 458-468页

作者： Peng Zhu Cun liu Yiren yu Guoshu Gao yumeng Zhao Xiongfu Zhang Guodong liu Guohui Yang State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024 State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Zeolite nanosheets with a short b-axis thickness are highly desirable in lots of catalytic reactions due to their reduced diffusion resistance. Nevertheless, conventional synthesis methods usually require expensive structure-directing agents(SDAs), pricey raw materials, and eco-unfriendly fluorine-containing additives. Here, we contributed a cost-effective and fluoride-free synthesis method for synthesizing high-quality MFI zeolite nanosheets through a Silicalite-1(Sil-1) seed suspension and urea cooperative strategy, only with inexpensive colloidal silica as the Si source. Our approach was effective for synthesizing both Sil-1 and aluminum-containing ZSM-5 nanosheets. By optimizing key synthesis parameters,including seed aging time, seed quantity, and urea concentration, we achieved precise control over the crystal face aspect ratio and b-axis thickness. We also revealed a non-classical oriented nanosheet growth mechanism, where Sil-1 seeds induced the formation of quasi-ordered precursor particles, and the(010)crystal planes of these particles facilitated urea adsorption, thereby promoting c-axis-oriented *** obtained ZSM-5 nanosheets exhibited exceptional catalytic performance in the benzene alkylation with ethanol, maintaining stability for over 500 h, which is 5 times longer than traditional ZSM-5 catalysts. Furthermore, large-scale production of ZSM-5 nanosheets was successfully carried out in a 3 L highpressure autoclave, yielding samples consistent with those from laboratory-scale synthesis. This work marks a significant step forward in the sustainable and efficient production of MFI nanosheets using inexpensive and environmentally friendly raw materials, offering the broad applicability in catalysis.

关键词： MFI zeolite ZSM-5 Nanosheets Scale-up synthesis Aromatic alkylation

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Civil aviation emissions in China in 2019:Characteristics and abatement potential

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Journal of Environmental Sciences 2025年第5期151卷 225-237页

作者： Haowen An yu Wang Yaxin Wang Jun liu Xiaolong Tang Honghong Yi Department of Environmental Engineering School of Energy and Environmental EngineeringUniversity of Science and Technology BeijingBeijing 100083China Key Laboratory of Beijing Municipal Industry Pollutant Resources Processing Beijing 100083China

Civil aviation is one of the industries facing the greatest challenge in reaching carbon neutrality by the middle of this century,and this sector also contributes to adverse impacts on the regional air quality and human *** exhibits the second highest air passenger turnover *** understanding of civil aviation emissionsmust be urgently enhanced,and themitigation potential should be *** this study,on the basis of real domestic flight information for 2019,we built a greenhouse gas and air pollution emission inventory for the civil aviation sector in China with the fuel flowmethod based on the cruise and other *** thoroughly analyzed emissions by region,aircraft and engine types,and aircraft age,based on which we designed four measures to evaluate the abatement *** found that the hydrocarbon(HC),CO,NO_(x),SO_(2),particulate matter(PM)and CO_(2)emissions in 2019 reached 79.9 kt(95%CI[51.6–114.5]),176.3 kt(95%CI[114.5–248.2]),304.2 kt(95%CI[203.4–420.7]),23.2 kt(95%CI[14.2–33.7]),1.0 kt(95%CI[0.61–1.44])and 87.0 Mt(95%CI[57.4–119.6]),*** cruise phase was the major emission phase,accounting for 67%-87%of the total pollutant *** four measures were jointly implemented,the HC,CO,NO_(x),SO_(2),PM and CO_(2)emissions could be reduced by 61%,54%,55%,45%,32%and 38%,*** lower-emission aircraft and switching travel modes could substantially reduce civil aviation emissions in China.

关键词： Emission inventory Fuel flow method Cruise emission Age structure Reduction measures

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Statistical analysis on the validity of the cold plasma approximation for chorus waves based on Van Allen Probe observations and their effects on radiation belt electrons

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Earth and Planetary Physics 2025年第1期9卷 159-170页

作者： AoJun Ren Jiang yu Jing Wang ZuZheng Chen XiaoMan liu Planetary Environmental and Astrobiological Research Laboratory(PEARL) School of Atmospheric SciencesSun Yat-sen UniversityZhuhai Guangdong 519000China

Theoretical analysis has demonstrated that the dispersion relation of chorus waves plays an essential role in the resonant interaction and energy transformation between the waves and magnetospheric *** quantitative analyses often simplified the chorus dispersion relation by using the cold plasma ***,the applicability of the cold plasma assumption is doubtful,especially during geomagnetic *** here present a systematic statistical analysis on the validity of the cold plasma dispersion relation of chorus waves based on observations from the Van Allen Probes over the period from 2012 to *** statistical results show that the observed magnetic field intensities deviate substantially from those calculated from the cold plasma dispersion relation and that they become more pronounced with an increase in geomagnetic activity or a decrease in background plasma *** region with large deviations is mainly concentrated in the nightside and expands in both the radial and azimuthal directions as the geomagnetic activity increases or the background plasma density *** addition,the bounce-averaged electron scattering rates are computed by using the observed and cold plasma dispersion relation of chorus *** with usage of the cold plasma dispersion relation,usage of the observed dispersion relation considerably lowers the minimum resonant energy of electrons and lowers the scattering rates of electrons above tens of kiloelectronvolts but enhances those ***,these differences are more pronounced with the enhancement of geomagnetic activity or the decrease in background plasma density.

关键词： chorus waves cold plasma approximation dispersion relations scattering rates

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Gentiopicroside Alleviates Atherosclerosis by Suppressing Reactive Oxygen Species-Dependent NLRP3 Inflammasome Activation in Vascular Endothelial Cells via SIRT1/Nrf2 Pathway

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Chinese Journal of Integrative Medicine 2025年第2期31卷 118-130页

作者： LI Zhu-qing ZHANG Feng LI Qi WANG Li SUN Xiao-qiang LI Chao YIN Xue-mei liu Chun-lei WANG Yan-xin DU Xiao-yu LU Cheng-zhi Department of Cardiology Tianjin First Central HospitalTianjin300192China The First Central Clinical School Tianjin Medical UniversityTianjin300070China Department of Cardiology The First College of Clinical Medical ScienceChina Three Gorges University&Yichang Central People’s HospitalYichangHubei Province443003China School of Medicine Nankai UniversityTianjin300071China

Objective:To evaluate the protective effects of gentiopicroside(GPS)against reactive oxygen species(ROS)-induced NOD-like receptor family,pyrin domain containing 3(NLRP3)inflammasome activation in endothelial cells,aiming to reduce ***:Eight-week-old male ApoE-deficient mice were randomly divided into 2 groups(n=10 per group):the vehicle group and the GPS treatment *** groups were fed a high-fat diet for 16 ***(40 mg/kg per day)was administered by oral gavage to the GPS group,while the vehicle group received an equivalent volume of the vehicle *** the end of the treatment,blood and aortic tissues were collected for assessments of atherosclerosis,lipid profiles,oxidative stress,and molecular expressions related to NLRP3 inflammasome activation,ROS production,and ***,in vitro experiments on human aortic endothelial cells treated with oxidized low-density lipoprotein(ox-LDL)were conducted to evaluate the effects of GPS on NLRP3 inflammasome activation,pyroptosis,apoptosis,and ROS production,specifically examining the role of the sirtuin 1(SIRT1)/nuclear factor erythroid 2-related factor 2(Nrf2)***1 and Nrf2 inhibitors were used to confirm the pathway's ***:GPS treatment significantly reduced atherosclerotic lesions in the en face aorta(P<0.01),as well as in the thoracic and abdominal aortic regions,and markedly decreased sinus lesions within the aortic root(P<0.05 or P<0.01).Additionally,GPS reduced oxidative stress markers and proinflammatory cytokines,including interleukin(IL)-1βand IL-18,in lesion areas(P<0.05,P<0.01).In vitro,GPS inhibited ox-LDL-induced NLRP3 activation,as evidenced by reduced NLRP3(P<0.01),apoptosis-associated speck-like protein containing a CARD,cleaved-caspase-1,and cleavedgasdermin D expressions(all P<0.01).GPS also decreased ROS production,apoptosis,and pyroptosis,with the beneficial effects being significantly reversed by SIRT1 or Nrf2 ***:GPS exe

关键词： endothelial dysfunction gentiopicroside NLRP3 inflammasome SIRT1 nuclear factor erythroid 2-related factor 2 Chinese medicine

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MXene Hybridized Polymer with Enhanced Electromagnetic Energy Harvest for Sensitized Microwave Actuation and Self‑Powered Motion Sensing

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Nano-Micro Letters 2025年第3期17卷 265-279页

作者： yu‑Ze Wang yu‑Chang Wang Ting‑Ting liu Quan‑Liang Zhao Chen‑Sha Li Mao‑Sheng Cao School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China School of Materials Science and Engineering Peking UniversityBeijing 100871People’s Republic of China School of Mechanical and Material Engineering North China University of TechnologyBeijing 100144People’s Republic of China Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People’s Republic of ChinaHeilongjiang UniversityHarbin 150080People’s Republic of China

Polymeric microwave actuators combining tissue-like softness with programmablemicrowave-responsive deformation hold great promise for mobile intelligentdevices and bionic soft robots. However, their application is challenged by restricted electromagneticsensitivity and intricate sensing coupling. In this study, a sensitized polymericmicrowave actuator is fabricated by hybridizing a liquid crystal polymer with Ti3C2Tx(MXene). Compared to the initial counterpart, the hybrid polymer exhibits unique spacechargepolarization and interfacial polarization, resulting in significant improvements of230% in the dielectric loss factor and 830% in the apparent efficiency of electromagneticenergy harvest. The sensitized microwave actuation demonstrates as the shortenedresponse time of nearly 10 s, which is merely 13% of that for the initial shape memory polymer. Moreover, the ultra-low content of MXene (upto 0.15 wt%) benefits for maintaining the actuation potential of the hybrid polymer. An innovative self-powered sensing prototype that combinesdriving and piezoelectric polymers is developed, which generates real-time electric potential feedback (open-circuit potential of ~ 3 mV) duringactuation. The polarization-dominant energy conversion mechanism observed in the MXene-polymer hybrid structure furnishes a new approachfor developing efficient electromagnetic dissipative structures and shows potential for advancing polymeric electromagnetic intelligent devices.

关键词： Microwave absorption Electromagnetic response Energy harvest Self-sensing Soft actuator

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Mitochondrial transplantation:a promising strategy for the treatment of retinal degenerative diseases

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Neural Regeneration Research 2025年第12期20卷 3370-3387页

作者： Jing Chi Bin Fan yulin Li qing Jiao Guang-yu Li Department of Ophthalmology The Second Norman Bethune Hospital of Jilin UniversityChangchunJilin ProvinceChina

The retina,a crucial neural tissue,is responsible for transforming light signals into visual information,a process that necessitates a significant amount of ***,the primary powerhouses of the cell,play an integral role in retinal physiology by fulfilling the high-energy requirements of photoreceptors and secondary neurons through oxidative *** a healthy state,mitochondria ensure proper visual function by facilitating efficient conversion and transduction of visual ***,in retinal degenerative diseases,mitochondrial dysfunction significantly contributes to disease progression,involving a decline in membrane potential,the occurrence of DNA mutations,increased oxidative stress,and imbalances in quality-control *** abnormalities lead to an inadequate energy supply,the exacerbation of oxidative damage,and the activation of cell death pathways,ultimately resulting in neuronal injury and dysfunction in the *** transplantation has emerged as a promising strategy for addressing these *** procedure aims to restore metabolic activity and function in compromised cells through the introduction of healthy mitochondria,thereby enhancing the cellular energy production capacity and offering new strategies for the treatment of retinal degenerative *** mitochondrial transplantation presents operational and safety challenges that require further investigation,it has demonstrated potential for reviving the vitality of retinal *** review offers a comprehensive examination of the principles and techniques underlying mitochondrial transplantation and its prospects for application in retinal degenerative diseases,while also delving into the associated technical and safety challenges,thereby providing references and insights for future research and treatment.

关键词： age-related macular degeneration Leber’s hereditary optic neuropathy mitochondrial transfer mitochondrial transplantation retinal degenerative diseases

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Probing the special angle in twisted bilayer MoS_(2)via angle-dependent scanning tunneling microscopy studies

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Science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 153-160页

作者： Xueying liu Shiying liu yulong Xiao Chang Xu Jiaxin Wu Kaihui Li Si-yu Li Anlian Pan Key Laboratory for Micro-Nano Physics and Technology of Hunan Province Hunan Institute of Optoelectronic Integration and College of Materials Science and EngineeringHunan UniversityChangsha410082China School of Physics and Electronics Hunan Normal UniversityChangsha410081China

Twisted transition metal dichalcogenides(TMDs)homo-bilayers host unique quantum properties,which can be tuned by interlayer twist angleθ.However,the systematic evolution of their typical electronic properties with respect to the twist angleθ,which is crucial for identifying the“special angle”analogous to the“magic angle”of twisted bilayer graphene in correlation physics studies,remains incompletely ***,via scanning tunneling microscopy(STM)and spectroscopy(STS),we investigate the variation of the moirépotential,flat band,and layer polarization characteristics across a wide range of twist angleθin twisted bilayer MoS_(2)(TB-MoS_(2)).The moirépotential of the valence band exhibits a non-monotonic variation withθ,peaking at a maximum value up to 204 me Vatθ~1.7°.Concurrently,at the sameθ,the bandwidth of the flat band at theΓ_(V)point of the valence band attains its minimum,precisely signifying the“special angle”θ_(c)~1.7°in TB-MoS_(2).Interestingly,layer polarization in the moirésuperlattice is spatially visualized through the distribution of local density of states(LDOS)at the energies of bothΓ_(V)and K_(V)points of the valence band,where the polarization degree at theΓ_(V)point demonstrates a close dependency onθ.Our findings deepen understanding of twist-angle effect in TMDs,advancing both fundamental physics and practical application.

关键词： twisted bilayer MoS_(2) flat band moirépotential twist-angle dependence scanning tunneling microscopy

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Residual symmetry and interactions between solitons and periodic waves of the Drinfeld-Sokolov-Satsuma-Hirota system

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Communications in Theoretical Physics 2025年第1期77卷 1-10页

作者： Jie-tong Li Jun yu Xi-zhong liu Institute of Nonlinear Science Shaoxing UniversityShaoxing 312000China

In this paper,the Drinfeld-Sokolov-Satsuma-Hirota(DSSH)system is studied by using residual symmetry and the consistent Riccati expansion(CRE)method,*** residual symmetry of the DSSH system is localized to Lie point symmetry in a properly prolonged system,based on which we get a new Bäcklund transformation for this *** symmetry reduction solutions of the DSSH system are obtained by applying the classical Lie group approach on the prolonged ***,the DSSH system proves to be CRE integrable and new interesting interaction solutions between solitons and periodic waves are generated and analyzed.

关键词： Drinfeld-Sokolov-Satsuma-Hirota system residual symmetry consistent Riccati expansion

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Effect of Hirudin on farnesol X receptor pathway during acute intrahepatic cholestasis

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Gastroenterology & Hepatology Research 2022年第2期4卷 29-35页

作者： yu-qing liu Yao Wang Wen-qian Tang Xin Cai Ren-wu Qin Lei Luo Fan Yang School of First Clinical Medicine Hubei University of Chinese MedicineHubei Wuhan 430061China Department of Infectious Diseases Renmin Hospital of Wuhan UniversityHubei Wuhan 430060China Yichang Hospital of TCM Affiliated to Clinical Medical College of TCM of China Three Gorges University Hubei Yichang 443003China The Second People’s Hospital of China Three Gorges University Hubei Yichang 443000China Department of Hepatology Hubei Provincial Hospital of Chinese MedicineHubei Wuhan 430061China

Objective:The purpose of this study is to explore the effect of Hirudin on the farnesoid X receptor(FXR)pathway during acute intrahepatic cholestasis in vivo and in ***:In vivo,sixty male Sprague-Dawley rats were randomly divided into six groups:regular group,model group,ursodeoxycholic acid(UDCA)group(60 mg/kg),hirudin treatment group(84 u/kg),hirudin treatment group(63 u/kg)and hirudin treatment group(42 u/kg).The male Sprague-Dawley rats of UDCA group were intragastrically administered with a corresponding concentration of 0.005 mL/g body weight for seven days,once a day;and the hirudin treatment group was injected subcutaneously with different concentrations of Hirudin for seven days,once a day;Except for the normal group,other groups of rats were given 100 mg/kg ANIT by gavage on the 5th *** model was administered by gavage once a day for three *** vitro,(Z)-Guggulsterone was used to stimulate the L02 cells(0.05μmol/ml),with or without different concentrations of Hirudin(2,4 and 8 u/ml)for 24 *** liver tissue was examined by HE microscope and the pathological state of the rat liver was observed;FXR,Small heterodimeric chaperone receptor(SHP),uridine diphosphate glucuronide transfer 2B4(UGT2B4),bile salt output pump(BSEP)mRNA and protein expressions were tested by real-time fluorescent quantitative PCR and Western blot *** immunohistochemistry(IHC)was used to analyze the expression of ***:Compared with the model group,the hirudin group can improve liver tissue damage,and promote FXR,SHP,BSEP and UGT2B4 proteins and mRNA expression in vivo and in ***:Hirudin can alleviate intrahepatic cholestasis,reduce liver tissue *** can up-regulate the expression of FXR gene,promote the up-regulation of SHP,BSEP and UGT2B4 genes,and inhibit the cholestasis pathway to protect liver *** study may provide an effective drug for clinical treatment of intrahepatic cholestasis.

关键词： hirudin (Z)-Guggulsterone α-isothiocyanate(ANIT) cholestasis FXR

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An efficient and accurate numerical method for simulating close-range blast loads of cylindrical charges based on neural network

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Defence Technology(防务技术) 2025年第2期44卷 257-271页

作者： Ting liu Changhai Chen Han Li Yaowen yu yuansheng Cheng School of Naval Architecture and Ocean Engineering Huazhong University of Science and TechnologyWuhan 430074China Hubei Key Laboratory of Naval Architecture and Ocean Engineering Hydrodynamics Wuhan 430074China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration Shanghai 200240China

To address the problems of low accuracy by the CONWEP model and poor efficiency by the Coupled Eulerian-Lagrangian(CEL)method in predicting close-range air blast loads of cylindrical charges,a neural network-based simulation(NNS)method with higher accuracy and better efficiency was *** NNS method consisted of three main ***,the parameters of blast loads,including the peak pressures and impulses of cylindrical charges with different aspect ratios(L/D)at different stand-off distances and incident angles were obtained by two-dimensional numerical ***,incident shape factors of cylindrical charges with arbitrary aspect ratios were predicted by a neural ***,reflected shape factors were derived and implemented into the subroutine of the ABAQUS code to modify the CONWEP model,including modifications of impulse and *** reliability of the proposed NNS method was verified by related experimental *** accuracy improvement was acquired by the proposed NNS method compared with the unmodified CONWEP ***,huge efficiency superiority was obtained by the proposed NNS method compared with the CEL *** proposed NNS method showed good accuracy when the scaled distance was greater than 0.2 m/kg^(1/3).It should be noted that there is no need to generate a new dataset again since the blast loads satisfy the similarity law,and the proposed NNS method can be directly used to simulate the blast loads generated by different cylindrical *** proposed NNS method with high efficiency and accuracy can be used as an effective method to analyze the dynamic response of structures under blast loads,and it has significant application prospects in designing protective structures.

关键词： Close-range air blast load Cylindrical charge Numerical method Neural network CEL method CONWEP model

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