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Interfacial synergism of hollow mesoporous Pt/WO_(x)/SiO_(2)-TiO_(2)catalysts enable highly selective hydrogenolysis of glycerol to 1,3-propanediol

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Nano Research 2023年第7期16卷 9081-9090页

作者： Yan Chen Yang Zeng chin-te hung Zhenghao Zhang Zirui Lv Senchuan Huang Yi Yang Yupu Liu Wei Li Department of Chemistry Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsState Key Laboratory of Molecular Engineering of Polymersand iChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Fudan UniversityShanghai 200433China

The selective hydrogenolysis of glycerol exhibits great prospects,while the catalysts with high selectivity and activity are still missing and need to be created ***,we report the synthesis of hollow mesoporous Pt/WO_(x)/SiO_(2)-TiO_(2)nanosphere catalysts with bi-functional interfaces synergistically for high efficiency conversion of glycerol to 1,*** hollow mesoporous Pt/WO_(x)/SiO_(2)-TiO_(2)catalysts show a typical brick-concrete liked framework with a high surface area(179.3 m^(2)·g^(-1)),large mesopore size(10.6 nm),uniform particle size(~400 nm),and ultrathin shell thickness(~75 nm).The brick anatase nanocrystals and concrete amorphous SiO_(2)networks can selectively rivet Pt nanoparticles and WO_(x)nanocluster species,respectively,thus constructing two interfaces for effective adsorption,rapidly catalytic dehydration and hydrogenation *** hollow mesoporous Pt/WO_(x)/SiO_(2)-TiO_(2)catalysts deliver a high selectivity of 53.8%for 1,3-propanediol(1,3-PDO)at a very high glycerol conversion of 85.0%.As a result,a favorable 1,3-PDO yield of 45.7%can be obtained with excellent stability,which is among the best performances of previously reported *** work paves a new way to synthesize catalysts with high selectivity,high activity and high stability.

关键词： hollow nanospheres mesoporous materials Pt/WO_(x)/SiO_(2)-TiO_(2)catalysts selective hydrogenolysis of glycerol 1,3-propanediol

Sorption Mechanism of CO2 in Amine-functionalized SBA-15 Mesoporous Silica Studied by Multinuclear Solid-state NMR Spectroscopy

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Sorption Mechanism of CO2 in Amine-functionalized SBA-15 Mes...

Ordered mesoporous carbon supported bifunctional PtM(M=Ru,Fe,Mo)electrocatalysts for a fuel cell anode

第十七届全国波谱学学术会议

作者： Jen-Shan Lin chin-te hung Shing-Jong Huang Yu-Chi Chang Institute of Atomic and Molecular Sciences Academic SinicaTaipei 10617 Department of Chemical and Materials Engineering Tamkang UniversityTamsui 23157 Department of Chemistry National Taiwan UniversityTaipei 10617

＜正＞Capture of CO2 via amine-functionalized SBA-15 mesoporous silica has attracted considerable attentions due to its high adsorption capacity and superior durability. However,the detailed mechanism invoked for such...

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chinese Journal of Catalysis 2016年第1期37卷 43-53页

作者：洪锦德刘子豪维拉库玛吴培豪刘端祺刘尚斌 "中央"研究院原子与分子科学研究所台湾台北10617 "国立"台湾科技大学化学工程系台湾台北10607 "国立"台湾师范大学化学系台湾台北10617

The deposition onto an ordered mesoporous carbon（OMC）support of well dispersed PtM（M = Ru,Fe,Mo）alloy nanoparticles（NPs）were synthesized by a direct replication method using SBA-15 as the hard template,furfuryl alcohol and trimethylbeneze as the primary carbon sources,and metal acetylacetonate as the alloying metal precursor and secondary carbon *** physicochemical properties of the PtM-OMC catalysts were characterized by N2 adsorption-desorption,X-ray diffraction,transmission electron microscopy,X-ray absorption near edge structure,and extended X-ray absorption fine *** alloy PtM NPs have an average size of 2-3 nm and were well dispersed in the pore channels of the OMC *** second metal（M）in the PtM NPs was mostly in the reduced state,and formed a typical core（Pt）-shell（M）*** voltammetry measurements showed that these PtM-OMC electrodes had excellent electrocatalytic activities and tolerance to CO poisoning during the methanol oxidation reaction,which surpassed those of typical activated carbon-supported PtRu *** particular,the PtFe-OMC catalyst,which exhibited the best performance,can be a practical anodic electrocatalyst in direct methanol fuel cells due to its superior stability,excellent CO tolerance,and low production cost.

关键词： Ordered mesoporous carbon Platinum-based electrocatalysts Methanol oxidation reaction X-ray absorption spectroscopy Core-shell alloy nanoparticles Carbon monoxide-stripping voltammetry Fuel cells

Apolipoprotein E elicits targetdirected miRNA degradation to maintain neuronal integrity

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Neural Regeneration Research 2025年第9期20卷 2577-2578页

作者： Jiazi Tan chin-Tong Ong temasek Life Sciences Laboratory National University of SingaporeSingapore Department of Biological Sciences National University of SingaporeSingapore

Apolipoprotein E has diverse functions in neurons:Apolipoprotein E(ApoE)is a glycoprotein that primarily regulates lipid metabolism and transport in the central nervous *** are three predominant human ApoE protein isoforms with cysteine and arginine substitutions at amino acid positions 112 and 158 that impact their lipidation and related functions(Flowers and Rebeck,2020).ApoE2 is characterized by Cys112 and Cys158,ApoE3 by Cys112 and Arg158,whereas ApoE4 contains Arg112 and Arg158.

关键词： metabolism glycoprotein maintain

Role of metabolic dysfunction and inflammation along the liver-brain axis in animal models with obesity-induced neurodegeneration

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Neural Regeneration Research 2025年第4期20卷 1069-1076页

作者： Evridiki Asimakidou Eka Norfaishanty Saipuljumri Chih hung Lo Jialiu Zeng Department of Clinical Neurosciences University of CambridgeCambridgeUK School of Applied Science Republic PolytechnicSingaporeSingapore Lee Kong Chian School of Medicine Nanyang Technological UniversitySingaporeSingapore

The interaction between metabolic dysfunction and inflammation is central to the development of neurodegenerative diseases such as Alzheimer’s disease and Parkinson’s ***-related conditions like type 2 diabetes and non-alcoholic fatty liver disease exacerbate this *** lipid accumulation,particularly in the liver,initiates a cascade of inflammatory processes that extend to the brain,influencing critical metabolic regulatory *** and palmitate,key lipid components,along with lipid transporters lipocalin-2 and apolipoprotein E,contribute to neuroinflammation by disrupting blood–brain barrier integrity and promoting *** insulin resistance further exacerbates brain insulin resistance and *** interventions targeting peripheral lipid metabolism and insulin signaling pathways have shown promise in reducing neuroinflammation in animal ***,translating these findings to clinical practice requires further investigation into human *** conclusion,metabolic dysfunction,peripheral inflammation,and insulin resistance are integral to neuroinflammation and *** these complex mechanisms holds potential for identifying novel therapeutic targets and improving outcomes for neurodegenerative diseases.

关键词： Alzheimer’s disease inflammatory cytokines insulin resistance lipid

Diffusion characteristics of HTO and 99TcO_4^- in compacted Gaomiaozi(GMZ) bentonite

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Nuclear Science and techniques 2017年第5期28卷 60-67页

作者： Tsuey-Lin Tsai Shih-chin Tsai Yu-hung Shih Liang-Cheng Chen Chuan-Pin Lee te-Yen Su Chemistry Division Institute of Nuclear Energy ResearchNo. 1000 Wenhua Rd. Jiaan Village Longtan DistrictTaoyuan China Nuclear Science and technology Development Center National Tsing Hua University Hsinchu China Department of Earth Sciences National Cheng Kung University No. 1 University Road Tainan China

The characteristics of diffusion are essential to the transport of radionuclides through buffer/backfill materials, such as bentonite, which are commonly found in waste repositories. This study used through-diffusion techniques to investigate the diffusion behavior of HTO and ^(99)TcO_4^- on GMZ bentonite of various densities. Diffusion rates were calculated by measuring the diffusion coefficients(De, Da), plotting breakthrough curves and interpreting experiment data. The apparent and effective diffusion coefficients of HTO ranged from(1.68 ± 0.40) 9 × 10^(-11) to(2.80 ± 0.62) 9 × 10^(-11) m^2/s and from(4.61 ±1.28) 9 × 10^(-12) to (16.2 ± 2.50) 9 × 10^(-12) m^2/s, *** apparent and effective diffusion coefficients of^(99)TcO_4^-ranged from(5.26 ± 0.16) 9 × 10^-12to(7.78 ± 0.43) 9× 10^-12m^2/s and from(1.49 ± 0.002) 9 × 10^(-12) to(4.16 ±0.07) 9 × 10^(-12) m^2/s, respectively. The distribution coefficients of HTO and^(99)TcO_4^-ranged from(0.70 ± 0.12) 9× 10^(-2) to(1.36 ± 0.53) 9 × 10^(-2) mL/g and from(1.12 ±0.06) 9 × 10^(-2) to(5.79 ± 2.22) 9 × 10^(-2) mL/g, *** Deand Kdvalues were shown to decrease with an increase in the bulk dry density of compacted bentonite. Our results show that HTO and ^(99)Tc could be considered nonsorbent radionuclides. The data obtained in this studyprovide a valuable reference for the safety assessment of waste repositories.

关键词： Distribution coefficient Apparent diffusion coefficient Effective diffusion coefficient Compacted bentonite Through-diffusion

Characterization and thrust measurements from electrolytic decomposition of ammonium dinitramide(ADN)based liquid monopropellant FLP-103 in MEMS thrusters

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chinese Journal of Chemical Engineering 2018年第9期26卷 1992-2002页

作者： Asad Rahman Jitkai chin Feroz Kabir Yew Mun hung Department of Chemical and Environmental Engineering University of Nottingham Malaysia Campus Jalan Broga43500 SemenyihSelangorMalaysia Department of Engineering and Mathematics Sheffield Hallam UniversitySheffield S1 1WBUnited Kingdom Department of Mechanical Engineering Monash University Sunway Campus Jalan Lagoon Selatan47500 5ubang JayoSelangorMalaysia

Although ammonium dinitramide(ADN)has been targeted as a potential green monopropellant in future space vehicles,its application potential in Micro-electrical–Mechanical System(MEMS)thrusters or microthrusters has been seldom reported in open *** this paper,electrolytic decomposition of Ammonium Dinitramide(ADN)-based liquid monopropellant FLP-103 was carried out in an open chamber and MEMS thrusters were fabricated from poly-dimethylsiloxane(PDMS)to characterize the power *** thrust measurement methods were employed to investigate the electrolytic decomposition of FLP-103 in MEMS *** results show that the monopropellant can be successfully ignited at room temperature through 80 V,0.1 A(8 W)using copper wire as *** the current thruster design,low thrust was obtained at FLP-103 flowrate of 40μl·min^(-1)but it generated the highest specific impulse,Isp,among all the flowrates *** experiments successfully demonstrated the potential application of electrolytic decomposition of FLP-103 in MEMS thrusters.

关键词： Ammonium Dinitramide (ADN) FLP-103 Electrolytic decomposition MEMS thruster

AModeling Study on ParticleDispersion inWall-Bounded Turbulent Flows

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Advances in Applied Mathematics and Mechanics 2014年第6期6卷 764-782页

作者： Jian-hung Lin Keh-chin Chang Department of Aeronautics and Astronautics National Cheng Kung UniversityNo.1University RdTainan 701Taiwan

Three physicalmechanismswhichmay affect dispersion of particle’smotion in wall-bounded turbulent flows,including the effects of turbulence,wall roughness in particle-wall collisions,and inter-particle collisions,are numerically investigated in this *** studies with differentwall roughness extents and with different mass loading ratios of particles are performed in fully developed channel flows with the Eulerian-Lagrangian approach.A low-Reynolds-number k−ǫturbulence model is applied for the solution of the carrier-flow field,while the deterministic Lagrangian method together with binary-collision hard-sphere model is applied for the solution of particle *** is shown that the mechanism of inter-particle collisions should be taken into account in the modeling except for the flows laden with sufficiently low mass loading ratios of *** of wall roughness on particle dispersion due to particle-wall collisions are found to be considerable in the bounded particleladen *** the investigated particles are associated with large Stokes numbers,i.e.,larger than O(1),in the test problem,the effects of turbulence on particle dispersion aremuch less considerable,as expected,in comparison with another two physical mechanisms investigated in the study.

关键词： Particle-laden flow turbulent dispersion inter-particle collision particle-wall collision.

Sediment removal efficiency of siphon dredging with wedge-type suction head and float tank

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International Journal of Sediment Research 2010年第2期25卷 149-160页

作者： Su-chin CHEN Chun-hung WU Department of Soil and Water Conservation National Chung Hsing University

Siphon dredging with a float tank and different siphon suction heads, including the plain-type and wedge-type with/without side holes, through flume experiments were used to investigate the reservoir sediment removal efficiency. The experiment revealed maximum suction pressure and velocity when the distance from the suction head to the bed was about 25% of suction head diameter. Suction pressure decreased rapidly as the distance from the suction head to the bed increased to 50% and 100% of suction head diameter. Suction pressure achieved by wedge-type suction head was only 16.9-17.6% of that around plain-type suction head, and the velocity around wedge-type suction head was 64.7-68.4% of that around plain-type suction head. However the plain-type suction head was easily clogged doe to its long bobbing period. The average bobbing period for the plain-type suction head was about 105-263% that of the wedge-type suction head. The sediment removal efficiency was achieved when float tank diameter was 3-4 times that of the suction head. Flow discharge and sediment removal increased as the suction head diameter and side hole diameter increased, respectively. The most efficient side hole area was an area within 15% of suction head area. Totally, the optimal sediment removal efficiency was the wedge angle of 20° with 3 side holes. The efficiency of sediment dredging by siphon suction with a suction tube passing through the dam bottom was better than that with suction passing over the top of the dam. The wedge-type siphon suction with a float tank is preferable for sediment dredging in small reservoirs because it is inexpensive and efficient.

关键词： Siphon dredging Sediment removal Wedge-type suction head Side hole Float tank