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Smart Molecules 2023年第3期1卷 89-97页

作者： Miao Dong Dazhuang Wang Jinrong Yang Pingping Sun Weilu Ding Jianxin Yang Jinwu Yan Weijie Chi Collaborative Innovation Center of One Health Key Laboratory of Green Catalysis and Reaction Engineering of HaikouSchool of Chemistry and Chemical EngineeringHainan UniversityHaikouChina MOE International Joint Research Laboratory on Synthetic Biology and Medicines School of Biology and Biological EngineeringSouth China University of TechnologyGuangzhouChina Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijingChina

Deep understanding of the fluorescence quenching mechanisms of probes plays a crucial role in developing their practical *** fluorescence quenching mechanism of hydrazine-based fluorescence probes needs to be clarified up to the ***,we designed and synthesized a new hydrazine-based fluorescence probe(HA-Na)based on the naphthalimide *** clarified the molecular origin of the non-fluorescence of this probe with the aid of computational chemistry and spectroscopic *** showed that the significant rotation of the hydrazine group in the excited state potential energy surface,which caused the complete charge separation,was responsible for the fluorescence quenching of the probe in an organic *** the rotation was prevented in an aggregative state or high-viscosity solution,the fluorescence of the probe *** other words,the fluorescence quenching mechanism of hydrazine-based fluorescence probes was attributed to the formation of a twisted intramolecular charge transfer(TICT)*** importantly,we demonstrated that this fluorescence molecular rotor could be used to monitor the autophagy process in living cells by detecting lysosomal viscosity changes during ***,this work provides an essential theoretical basis for the developing potential hydrazine-based fluorescence molecular rotors.

关键词： computational chemistry fluorescence probes fluorescence quenching mechanisms twisted intramolecular charge transfer

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Shale oil redistribution-induced flow regime transition in nanopores

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Energy 2023年 282卷

作者： Hai Sun Tianhao Li Zheng Li Dongyan Fan Lei Zhang Yongfei Yang Kai Zhang Junjie Zhong Jun Yao Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)) Ministry of Education Qingdao 266580 PR China Research Center of Multiphase Flow in Porous Media School of Petroleum Engineering China University of Petroleum (East China) Qingdao 266580 PR China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Chengdu 610059 PR China

The previous neglect of shale oil multi-component characteristics and the nanpore wall properties of real shale result in an insufficient understanding of shale oil flow mechanisms in nanopores . Meanwhile, research on the flow regimes of shale oil remains lacking. In this study, molecular dynamics simulations are employed to investigate the flow of shale oil in hydroxylated quartz nanopores and rough kerogen nanopores. Simulation results show that the flow regime changed as the pressure gradient (∇ p ) increased to a critical value (∇ p c ). The velocity profile was parabolic when ∇ p < ∇ p c , but gradually became piston-like when ∇ p ≥ ∇ p c . Because increasing ∇ p leads the adsorbed molecules desorbing, aggregating in the pore center, and forming clusters that are not easy to shear. Increasing vertical force from pore wall causes fluid aggregation in the pore center as ∇ p increases. The ∇ p c in kerogen nanopores is larger than that in quartz nanopores due to the rough kerogen surface and sticky layers. Multi-component fluids have higher ∇ p c than single-component fluids in quartz nanopores. However, they have the same ∇ p c in kerogen nanopores due to the rough kerogen surface. This investigation can provide theoretical basis for high-efficient production of shale oil.

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Towards strength-ductility synergy in nanosheets strengthened titanium matrix composites through laser power bed fusion of MXene/Ti composite powder

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Materials and Processing Report 2023年第1期38卷 Article: 2181680页

作者： L. Wang J. Li Z.Q. Liu S.F. Li Y.F. Yang R.D.K. Misra Z.J. Tian a College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics Nanjing China b Department of Technology Nanjing Chamlion Laser Technology Co. LTD Nanjing China c State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing Chinad Hefei University Hefei China c State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing Chinae University of Chinese Academy of Sciences Beijing China c State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing Chinae University of Chinese Academy of Sciences Beijing Chinaf Key Laboratory of Science and Technology on Particle Materials Chinese Academy of Sciences Beijing China g Department of Metallurgical Materials and Biomedical Engineering University of Texas at El Paso TX USA

ABSTRACTABSTRACTA Ti3C2MXene/Ti composite powder was developed through surface modification and powder coating for producing a high-performance titanium matrix composites (TMCs) by laser power bed fusion. Introducing MXene rarely changed the original sphericity and flowability of Ti powder while it slightly enhanced the laser absorption capacity of Ti powder. The printing conditions in turn affected the morphology and distribution of MXene in as-printed composites. At optimised printing parameters, majority of MXene with high structural integrity and uniform distribution remained along the grain boundaries of as-printed composites, and a combination of high surface quality, geometrical accuracy and densification was obtained. The remaining MXene played the synergy of pulling-out effect and load transfer role, which increased the yield strength from 530 to 710 MPa, while retaining good ductility (elongation of 19.8%). Compared with ASTM standard cast Ti64 alloy, our MXene/Ti composites also exhibited superior comprehensive tensile properties and excellent strength-ductility synergy.

关键词： Composite titanium powder processing MXene two-dimensional material

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Corrigendum to “A 1D model to predict ejector performance at critical and sub-critical operational regimes” [JIJR 36/6 (2013) 1750–1761]

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International Journal of Refrigeration 2017年 75卷 177-177页

作者： Weixiong Chen Ming Liu Daotong Chong Junjie Yan Adrienne Blair Little Yann Bartosiewicz State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China Université Catholique de Louvain (UCL) Institute of Mechanics Materials and Civil Engineering (iMMC) Place du Levant 2 B-1348 Louvain-la-Neuve Belgium George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA 30332-0405 USA

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Sodium-Ion Batteries: In Situ Fabrication of Branched TiO2/C Nanofibers as Binder-Free and Free-Standing Anodes for High-Performance Sodium-Ion Batteries (Small 30/2019)

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Small 2019年第30期15卷

作者： Ling Wang Guorui Yang Jianan Wang Silan Wang Caiyun Wang Shengjie Peng Wei Yan Seeram Ramakrishna Department of Environmental Science & Engineering State Key of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China ARC Centre of Excellence for Electromaterials Science Intelligent Polymer Research Institute University of Wollongong New South Wales 2522 Australia Department of Mechanical Engineering National University of Singapore Singapore 117574 Singapore

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Transient Evaporation Simulation of the Forced Circulation Hot Water Boiler

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IOP Conference Series: Materials Science and engineering 2020年第1期721卷

作者： Junjie Bao Di Wang Feng Liu Zhiguo Qu Hongtao Xu Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering School of Energy and Power Engineering University of Shanghai for Science and Technology Shanghai 200093 China Shanghai Institute of Special Equipment Inspection and Technical Research Shanghai 200062 China China Special Equipment Inspection and Research Institute Beijing 10013 China Moe Key Laboratory of Thermo-Fluid Science and Engineering Xi'an Jiaotong University Xi'an 710049 China

This paper presents a comprehensive analysis of the water vaporization in a hot water boiler system. The Computational Fluid Dynamics (CFD) technology was adopted to simulate the transient water evaporation in the boiler termed as DZL14-1.25/115/70-AⅡ under the assumption of extreme conditions such as the water pump failure. The results indicated that the average pressure in the pipeline increased from 0.57Mpa to 0.66Mpa (the setting pressure of the safety valve) within 1050s. The pressure increased rapidly with the time increase. The average temperature of hot water changed linearly with time, and the internal thermal deviation of the hot water pipeline in the boiler decreased with time. The internal vaporization phenomenon of the hot water boiler became significant under the extreme condition. The steam flowed upward and accumulated in the upper part of the boiler shell. At 1050s, the vapor volume fraction in the hot boiler was 1.05%, which indicated that the safety valve above the stream shell need to be opened in time after 1050s to ensure the safety of the boiler.

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Correction: Efficient transformation of CO2 to cyclic carbonates using bifunctional protic ionic liquids under mild conditions

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Green Chemistry 2021年第22期23卷 9179-9179页

作者： Xianglei Meng Zhaoyang Ju Suojiang Zhang Xiaodong Liang Nicolas von Solms Xiaochun Zhang Xiangping Zhang Beijing Key Laboratory of Ionic Liquids Clean Process Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 People's Republic of China Department of Chemical and Biochemical Engineering Center for Energy Resources Engineering (CERE) Technical University of Denmark Kgs. Lyngby Denmark School of Chemical Engineering University of Chinese Academy of Sciences Beijing 100049 China

Correction for ‘Efficient transformation of CO2 to cyclic carbonates using bifunctional protic ionic liquids under mild conditions’ by Xianglei Meng et al., Green Chem., 2019, 21, 3456–3463, DOI: 10.1039/C9GC01165J.

Correction for ‘Efficient transformation of CO₂ to cyclic carbonates using bifunctional protic ionic liquids under mild conditions’ by Xianglei Meng et al., Green Chem., 2019, 21, 3456–3463, DOI: 10.1039/C9GC01165J.

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Microalgae bio-oil production by pyrolysis and hydrothermal liquefaction: Mechanism and characteristics

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Bioresource Technology 2023年 376卷 128860页

作者： Ağbulut, Ümit Sirohi, Ranjna Lichtfouse, Eric Chen, Wei-Hsin Len, Christophe Show, Pau Loke Le, Anh Tuan Nguyen, Xuan Phuong Hoang, Anh Tuan Department of Mechanical Engineering Duzce University Düzce81620 Turkey School of Health Sciences and Technology University of Petroleum and Energy Studies Uttarakhand Dehradun248 007 India State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Shaanxi Xi'an710049 China Department of Aeronautics and Astronautics National Cheng Kung University Tainan701 Taiwan Research Center for Smart Sustainable Circular Economy Tunghai University Taichung407 Taiwan Department of Mechanical Engineering National Chin-Yi University of Technology Taichung411 Taiwan Institute of Chemistry for Life and Health Sciences PSL University France Department of Chemical Engineering Khalifa University P.O. Box 127788 Abu Dhabi United Arab Emirates Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protection Wenzhou University Wenzhou325035 China Department of Chemical and Environmental Engineering Faculty of Science and Engineering University of Nottingham Malaysia Jalan Broga Selangor Darul Ehsan Semenyih43500 Malaysia Department of Sustainable Engineering Saveetha School of Engineering SIMATS Chennai602105 India School of Mechanical Engineering Hanoi University of Science and Technology Hanoi Viet Nam PATET Research Group Ho Chi Minh City University of Transport Ho Chi Minh City Viet Nam Institute of Engineering HUTECH University Ho Chi Minh City Viet Nam

Microalgae have great potential in producing energy-dense and valuable products via thermochemical processes. Therefore, producing alternative bio-oil to fossil fuel from microalgae has rapidly gained popularity due to its environmentally friendly process and elevated productivity. This current work aims to review comprehensively the microalgae bio-oil production using pyrolysis and hydrothermal liquefaction. In addition, core mechanisms of pyrolysis and hydrothermal liquefaction process for microalgae were scrutinized, showing that the presence of lipids and proteins could contribute to forming a large amount of compounds containing O and N elements in bio-oil. However, applying proper catalysts and advanced technologies for the two aforementioned approaches could improve the quality, heating value, and yield of microalgae bio-oil. In general, microalgae bio-oil produced under optimal conditions could have 46 MJ/kg heating value and 60% yield, indicating that microalgae bio-oil could become a promising alternative fuel for transportation and power generation. © 2023 Elsevier Ltd

关键词： Microalgae

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Inside Back Cover: A Universal Formation Mechanism of Hollow Multi-Shelled Structures Dominated by Concentration Waves (Angew. Chem. Int. Ed. 28/2023)

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Angewandte Chemie International Edition 2023年第28期62卷

作者： Dr. Yanze Wei Yiping Cheng Dr. Decai Zhao Yuan Feng Peng Wei Dr. Jiangyan Wang Prof. Wei Ge Prof. Dan Wang State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P. R. China

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A Universal Formation Mechanism of Hollow Multi-Shelled Structures Dominated by Concentration Waves

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Angewandte Chemie 2023年第28期135卷

Hollow multi-shelled structures (HoMS), a new family of hierarchical nano/micro-structured materials, have evoked intensive studies to discover their unique temporal-spatial ordering features. The theoretical understanding of the general synthetic methods of HoMS, i.e. the sequential templating approach (STA), makes it possible to understand, predict, and control the shell formation process. Herein, a mathematical model is established based on the experiment results, which reveal the appearance of concentration waves in the STA. The numerical simulation results not only correspond well to the experimental observations but also explain the regulation methods. Whereby, the underlying physical essence of STA is elucidated, suggesting that HoMS is the concrete representation of the concentration waves. Thereafter the formation of HoMS is not limited to the solid-gas reactions through high-temperature calcination, but could be extended to solution systems under low-temperature conditions.

关键词： Concentration Wave General Synthesis Hollow Multishelled Structure Numerical Simulation Sequential Templating Approach

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