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Reactant enrichment in hollow void of Pt NPs@MnOx nanoreactors for boosting hydrogenation performance

National Science Review 2023年第10期10卷 114-122页

作者： Yanfu Ma Liwei Wang Wantong Zhao Tianyi Liu Haitao Li Wenhao luo qike Jiang Wei Liu qihua Yang Jun Huang Riguang Zhang Jian Liu g.q.max lu Can Li State Key Laboratory of Catalysis Dalian Institute of Chemical Physics (DICP)Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of Technology DICP-Surrey Joint Centre for Future Materials Department of Chemical and Process EngineeringUniversity of Surrey CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences School of Chemistry and Chemical Engineering Inner Mongolia University Division of Energy Research Resources Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academyof Sciences Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces Institute of Physical ChemistryZhejiang Normal University Laboratory for Catalysis Engineering School of Chemical and Biomolecular Engineering Sydney Nano Institute The University of Sydney University of Surrey

In confined mesoscopic spaces,the unraveling of a catalytic mechanism with complex mass transfer and adsorption processes such as reactant enrichment is a great *** this study,a hollow nanoarchitecture of MnOx-encapsulated Pt nanoparticles was designed as a nanoreactor to investigate the reactant enrichment in a mesoscopic hollow *** employing advanced characterization techniques,we found that the reactant-enrichment behavior is derived from directional diffusion of the reactant driven through the local concentration gradient and this increased the amount of *** experimental results with density functional theory calculations,the superior cinnamyl alcohol(COL)selectivity originates from the selective adsorption of cinnamaldehyde(CAL) and the rapid formation and desorption of COL in the *** superb performance of 95% CAL conversion and 95% COL selectivity is obtained at only 0.5 MPa H2and 40 *** findings showcase that a rationally designed nanoreactor co uld boost catalytic performance in chemoselective hydrogenation,which can be of great aid and potential in various application scenarios.

关键词： reactant enrichment nanoreactor effect selective hydrogenation hollow nanostructure mesoporous materials

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Nanoengineering of amino-functionalized mesoporous silica nanospheres as nanoreactors

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Progress in Natural Science:Materials International 2018年第2期28卷 242-245页

作者： Jinsuo gao Shouchun Wu Feng Tan Hao Tian Jian Liu g.q.max lu Key Laboratory of Industrial Ecology and Environmental Engineering (MOE) School of Environmental Science and Technology Dalian University of Technology State Key Laboratory of Catalysis iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Department of Chemical and Process Engineering and Advanced Technology Institute University of Surrey Vice-Chancellor's Office University of Surrey

Selective functionalization of mesoporous silica nanospheres（MSNs） is crucial for nanoengineering of ***, we have combined "surface-protected etching strategy" and "cationic surfactant assisted etching strategy" to prepare functionalized MSNs with externally attached amino groups. The externally attached NH;groups endow the catalysts with excellent catalytic performance for nitroaldol reaction between nitromethane and benzaldehyde. In addition, those NH;-MSNs can also be used to support gold nanoparticles, which display very good catalytic performance for reduction of 4-nitrophenol. It can be envisioned that the synthesis protocol developed in this work could also be extended to nanoengineered MSNs, which provides opportunities for nanoreactors design.

关键词： Mesoporous silica nanospheres Nanoengineering Nanoreactors Catalysis

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Rational design of AggaS/ZnS/ZnS quantum dots with a near-unity photoluminescence quantum yield via double shelling scheme

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Journal of Materials Science & Technology 2024年第2期169卷 235-242页

作者： H.X.lu H.Liu Z.Z.Fu Y.Y.Chen H.q.Dai Z.Hu W.L.Zhang R.q.guo Institute for Electric Light Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China Institute of Future Lighting Academy for Engineering and TechnologyFudan UniversityShanghai 200433China Yiwu Research Institute of Fudan University YiwuZhejiang 322000China Zhongshan-Fudan Joint Innovation Center Zhongshan 528437China

In this study,a two-step method was used to synthesize highly luminescent AggaS/ZnS/ZnS quantum dots(qDs).In the first step,an inner ZnS shell was formed via a one-pot method,which resulted in a smaller lattice mismatch between the AggaS core and the outer ZnS shell,thereby facilitating the formation of a thick outer *** the two-step shelling process,the synthesized AggaS/ZnS/ZnS qDs showed an excellent photoluminescence quantum yield(PLqY)of 96.4%with a peak wavelength of 508 nm,repre-senting the highest PLqY reported thus far for AggaS ***,the effect of halogen ions in Zn precursors on the shelling process was *** was proposed that the capacity of halogen ions to coordinate with the qDs influenced the balance between Zn cation diffusion and ZnS shelling ***,the ZnS shelling reaction was dominant when ZnCl_(2)was employed,while Zn cation diffusion was the dominant process under the I^(−)-rich *** work provides insights into the interfacial restructuring during the ZnS shelling and offers a clear map for the tailored synthesis of core/shell qDs.

关键词： AggaS quantum dots Photoluminescence Core/shell Alloyed core/shell interface

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Preface

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Chinese Science Bulletin 2014年第18期59卷 2071-2071页

作者： g.q.max lu The University of queensland

The ever increasing concerns over energy security due to the depletion of fossil fuel give rise to heightened interest in and greater effort towards more sustainable energy supply and *** the meantime,the climate change as a result of CO2emission from fossil fuel use is undoubtedly another key driver for renewable energy ***,renewable energy such as solar,hydroelectric,wind and geothermal only constitutes a very

关键词：可再生能源 CO2排放量化石燃料能源供应能源安全气候变化太阳能地热能

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A flexible multiscale algorithm based on an improved smoothed particle hydrodynamics method for complex viscoelastic flows

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Applied Mathematics and Mechanics(English Edition) 2024年第8期45卷 1387-1402页

作者： Jinlian REN Peirong lu Tao JIANg Jianfeng LIU Weigang lu College of Mathematical Science Yangzhou University College of Hydraulic Science and Engineering Yangzhou University

Viscoelastic flows play an important role in numerous engineering fields,and the multiscale algorithms for simulating viscoelastic flows have received significant attention in order to deepen our understanding of the nonlinear dynamic behaviors of viscoelastic fluids. However, traditional grid-based multiscale methods are confined to simple viscoelastic flows with short relaxation time, and there is a lack of uniform multiscale scheme available for coupling different solvers in the simulations of viscoelastic fluids. In this paper, a universal multiscale method coupling an improved smoothed particle hydrodynamics(SPH) and multiscale universal interface(MUI) library is presented for viscoelastic flows. The proposed multiscale method builds on an improved SPH method and leverages the MUI library to facilitate the exchange of information among different solvers in the overlapping domain. We test the capability and flexibility of the presented multiscale method to deal with complex viscoelastic flows by solving different multiscale problems of viscoelastic flows. In the first example, the simulation of a viscoelastic Poiseuille flow is carried out by two coupled improved SPH methods with different spatial resolutions. The effects of exchanging different physical quantities on the numerical results in both the upper and lower domains are also investigated as well as the absolute errors in the overlapping domain. In the second example, the complex Wannier flow with different Weissenberg numbers is further simulated by two improved SPH methods and coupling the improved SPH method and the dissipative particle dynamics(DPD) method. The numerical results show that the physical quantities for viscoelastic flows obtained by the presented multiscale method are in consistence with those obtained by a single solver in the overlapping domain. Moreover, transferring different physical quantities has an important effect on the numerical results.

关键词： 35q30 76A10 76M28 complex viscoelastic flow dissipative particle dynamics (DPD) improved smoothed particle hydrodynamics (SPH) multiscale method multiscale universal interface (MUI) O373

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From non-carbon host toward carbon-free lithium-sulfur batteries

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Nano Research 2024年第3期17卷 1337-1365页

作者： Yanqi Feng Hui Liu qiongqiong lu School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science and TechnologyXi’an 710021China Institute of Materials Henan Key Laboratory of Advanced Conductor MaterialsHenan Academy of SciencesZhengzhou 450046China Leibniz Institute for Solid State and Materials Research(IFW)Dresden e.V. Helmholtzstraβe 2001069 DresdenGermany School of Materials&Environment Engineering Chengdu Technological UniversityChengdu 611730China

Lithium-sulfur(Li-S)batteries with advantages of high energy densities(2600 Wh·kg^(-1)/2800 Wh·L^(-1))and sulfur abundance are regarded as promising candidates for next-generation high-energy ***,the conventional carbon host used in sulfur cathodes suffers from poor chemical adsorption towards Li-polysulfides(LPS)in liquid electrolyte and sluggish redox kinetics,leading to low capacity and rate ***,carbon host used in Li metal anode with the intrinsic property of poor lithiophilicity and high Li-nucleation barrier gives rise to uncontrollable dendrite growth and further battery ***,non-carbon hosts with chemical adsorption toward LPS and catalytic activity for accelerating LPS redox conversion as well as lithiophilic property for guiding uniform Li deposition are proposed and demonstrated a high efficiency in both sulfur cathodes and Li metal *** this review,the principle and challenges of Li-S batteries are first presented,then recent work using non-carbon hosts in Li-S batteries is summarized comprehensively,and the mechanism of non-carbon host in improving sulfur utilization and stabilizing Li metal anode is discussed in ***,remaining challenges and outlook on the implementation of non-carbon host for practical carbon-free Li-S batteries are also provided.

关键词： sulfur cathode Li metal anode polysulfides adsorption catalytic effect Li dendrite carbon-free lithium-sulfur batteries

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A Degree Condition for graphs Having All(a,b)-parity Factors

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Acta Mathematicae Applicatae Sinica 2024年第3期40卷 656-664页

作者： Hao-dong LIU Hong-liang lu School of Mathematics and Statistics Xi'an Jiaotong UniversityXi'an 710049China

Let a and b be positive integers such that a≤b and a≡b(mod 2).We say that g has all(a,b)-parity factors if g has an h-factor for every function h:V(g)→{a,a+2,…,b-2,b} with b|V(g)| even and h(v)≡b(mod 2) for all v∈V(g).In this paper,we prove that every graph g with n≥2(b+1)(a+b) vertices has all(a,b)-parity factors if δ(g)≥(b^(2)-b)/a,and for any two nonadjacent vertices u,v ∈V(g),max{d_(g)(u),d_(g)(v)}≥bn/a+***,we show that this result is best possible in some sense.

关键词： degree condition all(a,b)-factors

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Rational Design of Plasmonic Nanoparticle-Molecule Complexes for Chirality Sensing

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Chinese Journal of Chemistry 2024年第8期42卷 903-919页

作者： Chen Wang Dandan lu Lichao Sun qingfeng Zhang College of Chemistry and Molecular Sciences Wuhan UniversityWuhanHubei430072 China

Comprehensive Summary,Sensing the chirality of molecules is of great importance to fields such as enantioselective synthesis,pharmaceutical industry,and *** nanoparticles are ideal candidates for molecular sensing due to their inherent plasmonic properties that significantly enhance their sensitivity to surrounding *** plasmonic nanoparticle-molecule complexes for chirality sensing has drawn enormous attention in recent years due to their intriguing properties and potential ***,in this review,we believe it is timely to circumnavigate the rational design of plasmonic nanoparticle-molecule complexes and widen the scope of their emerging applications in chirality ***,we present different fundamental mechanisms for plasmon-based chirality that are built on the system of plasmonic nanoparticle-molecule ***,we review the typical applications of plasmonic nanoparticle-molecule complexes in chirality ***,we discuss the emerging biomedical applications that the plasmon-based chirality has attracted enormous ***,we provide an outlook on the challenges and opportunities in the field of plasmonic approaches for chirality sensing.

关键词： Chirality Surface plasmon resonance Nanoparticles Chiral molecules Chirality sensing

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geometric phase-encoded stimuli-responsive cholesteric liquid crystals for visualizing real-time remote monitoring:humidity sensing as a proof of concept

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Light(Science & Applications) 2024年第2期13卷 283-293页

作者： Shi-Long Li Zhao-Yi Chen Peng Chen Wei Hu Chaohong Huang Sen-Sen Li Xuejia Hu Yan-qing lu lu-Jian Chen Department of Electronic Engineering School of Electronic Science and EngineeringXiamen University361005 XiamenChina College of Engineering and Applied Sciences Nanjing University210093 NanjingChina Fujian Key Laboratory of Ultrafast Laser Technology and Applications Xiamen University361005 XiamenChina

Liquid crystals are a vital component of modern photonics,and recent studies have demonstrated the exceptional sensing properties of stimuli-responsive cholesteric liquid ***,existing cholesteric liquid crystal-based sensors often rely on the naked eye perceptibility of structural color or the measurement of wavelength changes by spectrometric tools,which limits their practical ***,developing a platform that produces recognizable sensing signals is *** this study,we present a visual sensing platform based on geometric phase encoding of stimuli-responsive cholesteric liquid crystal polymers that generates real-time visual patterns,rather than frequency *** demonstrate this platform’s effectiveness,we used a humidity-responsive cholesteric liquid crystal polymer film encoded with a q-plate pattern,which revealed that humidity causes a shape change in the vortex beam reflected from the encoded cholesteric liquid crystal ***,we developed a prototype platform towards remote humidity monitoring benefiting from the high directionality and long-range transmission properties of laser beams carrying orbital angular *** approach provides a novel sensing platform for cholesteric liquid crystals-based sensors that offers promising practical *** ability to generate recognizable sensing signals through visual patterns offers a new level of practicality in the sensing field with stimuli-responsive cholesteric liquid *** platform might have significant implications for a broad readership and will be of interest to researchers working in the field of photonics and sensing technology.

关键词： humidity visual liquid

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Large reversible magnetocaloric effect in antiferromagnetic Er_(3)Si_(2)C_(2) compound

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Journal of Rare Earths 2024年第8期42卷 1555-1559,I0005页

作者： Hao Sun lu Tian Xinqiang gao Zhaojun Mo Jun Shen Baogen Shen School of Rare Earths University of Science and Technology of ChinaHefei230026China ganjiang Innovation Academy Chinese Academy of SciencesGanzhou34100China Department of Energy and Power Engineering School of Mechanical EngineeringBeijing Institute of TechnologyBeijing00081China

The magnetic properties,magnetic phase transition and magnetocaloric effects(MCE) of Er_(3)Si_(2)C_(2) compound were investigated based on theoretical calculations and experimental *** on the first principles calculations,the antiferromagnetic(AFM) ground state type in Er_(3)Si_(2)C_(2) compound was predicted and its electronic structure was *** experimental results show that Ei_(3)Si_(2)C_(2) compound is an AFM compound with the Neel temperature(I_N) of 7 K and undergoes a field-induced firstorder magnetic phase transition from AFM to ferromagnetic(FM) under magnetic fields exceeding 0.6 T at 2 *** magnetic transition process of Er_(3)Si_(2)C_(2) compound was investigated and *** values of the maximum magnetic entropy change(-ΔS_(M)^(max)) and the refrigeration capacity(RC) are 17 J/(kg·K)and 193 J/kg under changing magnetic fields of 0-5 T,*** a potential cryogenic magnetic refrigerant,the Er_(3)Si_(2)C_(2) compound also provides an interesting research medium to study the magnetic phase transition process.

关键词： Magnetic materials Magnetocaloric Metamagnetic transitions Magnetic phase transition Rare earths

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