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Engineering the microstructures of manganese dioxide coupled with oxygen vacancies for boosting aqueous ammonium-ion storage in hybrid capacitors

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Rare Metals 2024年第11期43卷 5734-5746页

作者： Xin-Liang Han Jie Zhang zuo-shu Wang Hussein A.Younus De-Wei Wang College of Materials Science and Engineering North Minzu UniversityYinchuan 750021China Nanotechnology Research Centre Sultan Qaboos UniversityAl-Khoudh123 MuscatOman

The aqueous ammonium ion(NH_(4)^(+))is a promising charge carrier in virtue of its safety,environmental friendliness,abundant resources and small hydrated ionic *** exploration of NH_(4)^(+)host electrodes with good reversibility and large storage capacity to construct high-performance ammonium-ion hybrid capacitors(AIHCs),however,is still in its ***,a facile etching technique is put forward to produce oxygen-deficient MnO_(2)(O_(d)-MnO_(2))as the electrode material for NH_(4)^(+)*** to the experimental and theoretical calculation results,the etching process not only creates more porosity,offering abundant active sites,but also generates abundant oxygen vacancies,which modify the structure of pristine MnO_(2),enhance charge storage capacity and boost ion diffusion ***,Od-MnO_(2)can deliver a specific capacity of 155 mAh·g^(-1)at 0.5 A·g^(-1)and a good long-term cycling stability with86.8%capacity maintained after 10,000 cycles at5.0 A·g^(-1).Additionally,the NH_(4)^(+)storage mechanism was evidenced by several ex-situ characterization *** examine the actual implementation of O_d-MnO_(2)as a positive electrode for NH_(4)^(+)full device,AIHCs are assembled with activated carbon functionalized with Fe_3O_(4)nanoparticles(Fe_(3)O_(4)@AC)as a negative electrode.A high specific capacitance of 184 F·g^(-1)at 0.5 A·g^(-1),satisfactory energy density of 102 Wh·kg^(-1)at 500 W·kg^(-1),a low self-discharge rate and good cycling durability after 10,000 cycles are *** electrochemical performance of these AIHCs is comparable to or surpass those of traditional supercapacitors with metal ions as charge carriers,highlighting the advantages of structural modification in enhancing the NH_(4)^(+)storage performance.

关键词： Ammonium ion hybrid capacitors NH_(4)^(+)storage Oxygen vacancy Manganese oxide Energy storage mechanism

Infrared Spectroscopic Investigations of J-aggregates of Protonated Tetraphenylporphine

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Chemical Research in Chinese Universities 2009年第2期25卷 257-260页

作者： ZHOU Mi LU Guo-hui GAO shu-qin LI zuo-wei State Key Laboratory of Superhard Materials College of Physics Jilin University Changchun 130023 China

Protonated tetraphenylporphine（H2TPP） J-aggregates were prepared by aggregation on the liquid-air interface. Using FTIR spectroscopy, the authors observed the infrared absorption spectra of H2TPP and its J-aggregates. The IR spectra of H2TPP J-aggregates show significant changes compared with that of HETPP monomer. Intensity changes（e.g., strong enhancement of the in-plane vibronic mode and weakening of the out-of-plane vibronic mode of phenyl and porphyrin skeletal） were interpreted on the basis of stacking effects. Observation of the same type of bands collapse into single band was explained by the increase in the symmetry of H2TPP molecules. And the new bands at 1635 and 3407 cm^-1 indicate the aggregates containing a large amount of bound water.

关键词： J-aggregate Meso-tetraphenylporphine Stacking effect

A study of suspended sediment concentration in Yangshan deep-water port in Shanghai,China

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International Journal of Sediment Research 2012年第1期27卷 50-60页

作者： shu-hua zuo Ning-chuan ZHANG Bei LI Shen-liang CHEN Key Laboratory of Engineering Sediment of Ministry of Communications Tianjin Research Institute of Water Transport Engineering State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology State Key Laboratory of Estuarine and Coastal Research East China Normal University

Suspended sediment concentration(SSC) plays an important role in the estuarine *** spatial or temporal variations in coastal zones and estuaries indicate that sediments are suspended, transported and deposited under various actions,such as the river discharge,waves,currents and local *** deep-water port is located in the Qiqu Archipelago with many islands and tidal *** Yangshan deep-water port sea area as an example,an analysis of distributions and variations in the SSC based on data measured in Oct.1996,Jan.1999,May 2006 and May 2007 and the surface SSC data measured during the period from 1998 to 2008,has been *** from the study suggest that:(1) the yearly-averaged SSC decreased from 1998 to 2008;(2) the SSC has strong seasonal variations,the monthly-averaged SSC values are higher from November to April of the next year(the winter half year) than from May to October(the summer half year);(3) the periodic nature of the changes are obvious,which is consistent with a tidal semimonthly cycle of approximately 14.8 days;(4) the vertical distribution which is an e exponential distribution increase from the surface to the ***,the data indicate that tidal currents are the most dominant factor affecting the *** the Yangtze River discharges abundant sediments to the study area,it does not directly affect concentration variations in seasonal time *** in yearly variation or long time scales,the SSC varying trend is coincident with sediment discharge change of the Yangtze *** addition,the construction projects,or dumping of sediments,have obvious effects on SSC and sedimentation for part of the area."Strait-channel effects" have some degree of influence to the SSC distribution around islands.

关键词： Yangshan deep-water port Hydrodynamic Suspended sediment concentration(SSC) Strait-channel effects

Nonextensive effects on QCD chiral phase transition with a chiral chemical potential

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Chinese Physics C 2022年第10期46卷 98-106页

作者： Ya-Peng Zhao shu-Yu zuo Cheng-Ming Li School of Mathematics and Physics Henan Urban Construction UniversityPingdingshan 467036China College of Science Henan University of TechnologyZhengzhou 450000China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China

In this study,we investigate the QCD chiral phase diagram in the presence of a chiral chemical potential μ based on nonextensive statistical mechanics.A feature of this new statistic is a dimensionless nonextensivity parameter q,which summarizes all possible effects violating the assumptions of Boltzmann-Gibbs(BG)statistics(when q→1,it returns to the BG case).Within the nonextensive Polyakov-Nambu-Jona-Lasinio model,we find that as μ increases,the critical end point(CEP)in the T-μ plane continues to CEP_(5)in the T-μ plane,and nonextensive effects have a significant impact on the evolution from the CEP to CEP_(5).Generally,with an increase in q,both the CEP and CEP_(5)move in the direction of a lower temperature T and larger chemical potentialμ(μ_(5)).In addition,we find that chiral charge density ngenerally increases with T,μ,μ_(5),and *** study may provide useful hints about lattice QCD and relativistic heavy-ion collision experiments.

关键词： nonextensive statistics Polyakov-Nambu-Jona-Lasinio model QCD phase diagram chiral chemical potential

QCD chiral phase transition and critical exponents within the nonextensive Polyakov-Nambu-Jona-Lasinio model

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Chinese Physics C 2021年第7期45卷 65-73页

作者： Ya-Peng Zhao shu-Yu zuo Cheng-Ming Li Collage of Physics and Electrical Engineering Anyang Normal UniversityAnyang 455000China College of Science Henan University of TechnologyZhengzhou 450000China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China

We present a nonextensive version of the Polyakov-Nambu-Jona-Lasinio model that is based on nonextentive statistical *** new statistics model is characterized by a dimensionless nonextensivity parameter q that accounts for all possible effects violating the assumptions of the Boltzmann-Gibbs(BG) statistics(for q→ 1,it returns to the BG case).Based on the nonextensive Polyakov-Nambu-Jona-Lasinio model,we discussed the influence of nonextensive effects on the curvature of the phase diagram at μ=0 and especially on the location of the critical end point(CEP).A new and interesting phenomenon we found is that with an increase in q,the CEP position initially shifts toward the direction of larger chemical potential and lower ***,when q is larger than a critical value qc,the CEP position moves in the opposite *** other words,as q increases,the CEP position moves in the direction of smaller chemical potential and higher *** U-turn phenomenon may be important for the search of CEP in relativistic heavy-ion collisions,in which the validity of BG statistics is questionable due to strong fluctuations and long-range correlations,and nonextensive effects begin to manifest *** addition,we calculated the influence of the nonextensive effects on the critical exponents and found that they remain almost constant with q.

关键词： nonextensive statistics Polyakov-Nambu-Jona-Lasinio model QCD chiral phase

Patient satisfaction and follow-up adherence to glaucoma case management clinic in China

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International Journal of Ophthalmology(English edition) 2024年第1期17卷 73-81页

作者： Hao Lin Hu-Jie Lu Wen-Zhe Zhou shu-shu zuo Yan-Yan Chen Shao-Dan Zhang National Clinical Research Center for Ocular Diseases Eye HospitalWenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina School of Ophthalmology and Optometry Biomedical EngineeringWenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina

AIM:To assess glaucoma patient satisfaction and follow-up adherence in case management and identify associated predictors to improve healthcare quality and patient ***:In this cross-sectional study,a total of 119 patients completed a Patient Satisfaction Questionnaire-18 and a sociodemographic *** data was obtained from the case management ***-up adherence was defined as completing each follow-up within±30d of the scheduled time set by ophthalmologists during the study ***:Average satisfaction scored 78.65±7,with an average of 4.39±0.58 across the seven *** negatively correlated with satisfaction(P=0.008),whilst patients with follow-up duration of 2 or more years reported higher satisfaction(P=0.045).Multivariate logistics regression analysis revealed that longer follow-up durations were associated with lower follow-up adherence(OR=0.97,95%CI,0.95-1.00,P=0.044).Additionally,patients with suspected glaucoma(OR=2.72,95%CI,1.03-7.20,P=0.044)and those with an annual income over 100000 Chinese yuan demonstrated higher adherence(OR=5.57,95%CI,1.00-30.89,P=0.049).CONCLUSION:The case management model proves effective for glaucoma patients,with positive adherence *** implementation of this model can be optimized in the future based on the identified factors and extended to glaucoma patients in more hospitals.

关键词： glaucoma patient satisfaction follow-up adherence case management

Electrochemical urea synthesis by co-reduction of CO_(2) and nitrate with Fe^(Ⅱ)-Fe^(Ⅲ)OOH@BiVO_(4) heterostructures

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Journal of Energy Chemistry 2023年第9期84卷 385-393页

作者： Hua-Qing Yin zuo-shu Sun Qiu-Ping Zhao Lu-Lu Yang Tong-Bu Lu Zhi-Ming Zhang Institute for New Energy Materials&Low Carbon Technologies School of Chemistry and Chemical EngineeringSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China

Traditional urea synthesis under harsh conditions is usually associated with high energy input and has aroused severe environmental *** C-N coupling by converting nitrate and CO_(2) into urea under ambient conditions represents a promising alternative *** it was still limited by the strong competition between nitrate electrochemical reduction(NO_(3)ER) and CO_(2) electrochemical reduction(CO_(2)ER).Here,Fe^(Ⅱ)-Fe~ⅢOOH@BiVO_(4)-n heterostructures are constructed through hydrothermal synthesis and exhibited superior performance toward urea electrosynthesis with NO_(3)~-and CO_(2) as *** optimized urea yield and Faradaic efficiency over Fe^(Ⅱ)-Fe~ⅢOOH@BiVO_(4)-2 can reach13.8 mmol h^(-1) g^(-1) and 11.5% at-0.8 V *** hydrogen electrode,which is much higher than that of bare FeOOH(3.2 mmol h^(-1) g^(-1) and 1.3%),pristine BiVO_(4)(2.0 mmol h^(-1) g^(-1) and 5.4%),and the other Fe^(Ⅱ)-Fe~ⅢOOH@BiVO_(4)-n(n=1,3,5) *** experiments have verified that BiVO_(4)and FeOOH are subreaction active sites towards simultaneous CO_(2)ER and NO_(3)ER,respectively,achieving co-activation of CO_(2) and NO_(3)~-on Fe^(Ⅱ)-Fe~ⅢOOH@BiVO_(4)-***,the urea synthesis via the ^(*)CO and NO*intermediates and C-N coupling was confirmed by the in situ Fourier transform infrared *** work not only alleviates the CO_(2) emission and nitrate pollution but also presents an efficient catalyst for synergistic catalysis towards sustainable urea synthesis.

关键词： Electrocatalysis Urea synthesis CO_(2)reduction Nitrate conversion

Numerical Modeling of the Undertow Structure and Sandbar Migration in the Surfzone

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China Ocean Engineering 2017年第5期31卷 549-558页

作者： XIE Ming-xiao ZHANG Chi YANG Zhi-wen LI Shan LI Xin GUO Wei-jun zuo shu-hua Key Laboratory of Engineering Sediment Tianjin Research Institute for Water Transport EngineeringM.O.T. National Engineering Laboratory for Port Hydraulic Construction Technology Tianjin Research Institute for Water Transport EngineeringM.O.T. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research Institute State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University Key Laboratory of Coastal Engineering Hydrodynamics of CCCC Tianjin Port Engineering InstituteCCCC College of Environmental Sciences and Engineering Dalian Maritime University

A process-based 3D numerical model for surfzone hydrodynamics and beach evolution was established. Comparisons between the experimental data and model results proved that the model could effectively describe the hydrodynamics, sediment transport feature and sandbar migration process in the surfzone with satisfactory precision. A series of numerical simulations on the wave breaking and shoaling up to a barred beach were carried out based on the model system. Analyzed from the model results, the wave-induced current system in the surfzone consists of two major processes, which are the phase-averaged undertow caused by wave breaking and the net drift caused by both of the nonlinear wave motion and surface roller effect. When storm waves come to the barred beach, the strong offshore undertow along the beach suppresses the onshore net drift, making the initial sandbar migrate to the seaside. Under the condition of calm wave environment, both the undertow and net drift flow to the shoreline at the offshore side of the sandbar, and then push the initial sandbar to the shoreline. The consideration of surface roller has significant impact on the modeling results of the sandbar migration. As the roller transfer rate increases, the sandbar moves onshore especially under the storm wave condition.

关键词： process-based numerical model undertow net driit sediment wansport sandbar migration

2:17-type SmCo permanent magnets with controllable remanence temperature coefficients via substitution of heavy rare earth elements

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Rare Metals 2024年第8期43卷 3990-3996页

作者： Jia-Yi Huang shu-Lan zuo Qi Zhang Hong-Yang Dai Lei Yang Jing-Hua Liu Cheng-Bao Jiang Key Laboratory of Aerospace Materials and Performance(Ministry of Education) School of Materials Science and EngineeringBeihang UniversityBeijing 100191China

Permanent magnets that can maintain a constant magnetic flux over a wide temperature range are highly desirable in certain applications such as precision instruments.2:17-type SmCo permanent magnets are promising for such instruments owing to their excellent high-temperature magnetic properties that can be further manipulated byadding heavy rare earth elements (HREs).

关键词： magnets permanent earth