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Flexible Zn-ion batteries based on manganese oxides: Progress and prospect

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Carbon Energy 2020年第3期2卷 387-407页

作者： Xingyuan Gao Haozhe Zhang Xiaoqing Liu Xihong Lu Department of Chemistry Engineering Technology Development Center of Advanced Materials&Energy Saving and Emission Reduction in Guangdong Colleges and UniversitiesGuangdong University of EducationGuangzhouChina MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry The Key Lab of Low-carbon Chem&Energy Conservation of Guangdong ProvinceSchool of ChemistrySun Yat-Sen UniversityGuangzhouChina

The ever-growing market of wearable electronic devices has greatly stimulated the rapid development of flexible Zn-ion batteries(ZIBs).Manganese oxides are one of the most commonly used hosts for zinc ion accommodation and thus receive particular research interest for high-performance flexible ZIB *** this review,a comprehensive summary of the recent development of flexible ZIBs with manganese oxides as cathode materials is *** from the brief introduction of flexible electronic devices and ZIBs,the charge storage mechanisms and crystal structures of various manganese oxides are *** of the cathode materials in terms of morphology,conductivity,structures,and flexibilities are illustrated in detail,together with the demonstration of structure-performance relationships and applications in flexible ***,limitations to be overcome are indicated and the future work directions are proposed.

关键词： cathodes flexible devices manganese oxides MnO2 Zn-ion batteries

Microwave CVD Thick Diamond Film Synthesis Using CH4/H2/H2O Gas Mixtures

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Plasma Science and Technology 2006年第3期8卷 329-332页

作者：满卫东汪建华王传新马志斌王升高熊礼威 Hubei Provincial Key Laboratory of Plasma Chemistry & advanced Materials Wuhan Institute of Technology Wuhan 430073 China Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China Hubei Provincial Key Laboratory of Plasma Chemistry & advanced Materials Wuhan Institute of Technology Wuhan 430073 China Hubei Provincial Key Laboratory of Plasma Chemistry & advanced Materials Wuhan Institute of Technology Wuhan 430073 China Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China

Thick diamond films with a thickness of up to 1.2 mm and a area of 20 cm^2 have been grown in a homemade 5 kW microwave plasma chemical vapor deposition （MPCVD） reactor using CH4/H2/H2O gas mixtures. The growth rate, radial profiles of the film thickness, diamond morphology and quality were evaluated with a range of parameters such as the substrate temperature of 700℃ to 1100℃, the fed gas composition CH4/H2 = 3.0%, H2O/H2 = 0.0%,-2.4%. They were characterized by scanning electron microscopy and Raman spectroscopy. Translucent diamond wafers have been produced without any sign of non-diamond carbon phases, Raman peak as narrow as 4.1 cm^-1. An interesting type of diamond growth instability under certain deposition conditions was observed in a form of accelerated growth of selected diamond crystallites of a very big lateral size, about 1 mm, and of a better structure compared to the rest of the film.

关键词： diamond film microwave Raman spectroscopy water

Optimal power and subcarrier allocation with partial side information for downlink OFDMA system

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The Journal of China Universities of Posts and Telecommunications 2010年第5期17卷 50-57页

作者： ZENG Ling-kang LIU Yuan-an XIE Gang CHANG Ling-jun Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

In this paper,we investigate the power and subcarrier allocation issue in the case of partial side information for downlink orthogonal frequency division multiple access （OFDMA） *** method is utilized to characterize the necessary conditions of the optimal solution and the uniqueness of the optimal solution is *** game theoretical concept,surplus function is also introduced to analyze the optimal *** on the theoretical analysis,we propose iterative surplus balancing algorithm （ISBA） that can jointly assign the power and subcarriers in multiple rounds,and then the optimality of ISBA is *** results are presented to show the characteristics of the theoretical analysis and ISBA.

关键词： resource allocation partial side information OFDMA surplus function game theory

Hole quality in longitudinal–torsional coupled ultrasonic vibration assisted drilling of carbon fiber reinforced plastics

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Frontiers of Mechanical Engineering 2020年第4期15卷 538-546页

作者： Guofeng MA Renke KANG Zhigang DONG Sen YIN Yan BAO Dongming GUO Key Laboratory for Precision and Non-Traditional Machining of Ministry of education Dalian University of TechnologyDalian 116024China

Carbon fiber reinforced plastic (CFRP) composites are extremely attractive in the manufacturing of structural and functional components in the aircraft manufacturing field due to their outstanding properties, such as good fatigue resistance, high specific stiffness/strength, and good shock absorption. However, because of their inherent anisotropy, low interlamination strength, and abrasive characteristics, CFRP composites are considered difficult-to-cut materials and are prone to generating serious hole defects, such as delamination, tearing, and burrs. The advanced longitudinal–torsional coupled ultrasonic vibration assisted drilling (LTC-UAD) method has a potential application for drilling CFRP composites. At present, LTC-UAD is mainly adopted for drilling metal materials and rarely for CFRP. Therefore, this study analyzes the kinematic characteristics and the influence of feed rate on the drilling performance of LTC-UAD. Experimental results indicate that LTC-UAD can reduce the thrust force by 39% compared to conventional drilling. Furthermore, LTC-UAD can decrease the delamination and burr factors and improve the surface quality of the hole wall. Thus, LTC-UAD is an applicable process method for drilling components made with CFRP composites.

关键词： longitudinal–torsional coupled ultrasonically drilling CFRP thrust force hole quality

Optimal regenerative repair of large segmental bone defect in a goat model with osteoinductive calcium phosphate bioceramic implants

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Bioactive Materials 2022年第5期7卷 240-253页

作者： Wei Zhi Xiaohua Wang Dong Sun Taijun Chen Bo Yuan Xiangfeng Li Xuening Chen Jianxin Wang Zhao Xie Xiangdong Zhu Kai Zhang Xingdong Zhang Key Laboratory of advanced Technologies of Materials Ministry of EducationSouthwest Jiaotong UniversityChengdu610031China Department of Orthopaedics First Affiliated HospitalThird Military Medical University(Army Medical University)Gaotanyan No.30400038ChongqingChina National Engineering Research Center for Biomaterials College of Biomedical EngineeringSichuan UniversityChengdu610064China

So far,how to achieve the optimal regenerative repair of large load-bearing bone defects using artificial bone grafts is a huge challenge in *** this study,a strategy of combining osteoinductive biphasic calcium phosphate(BCP)bioceramic scaffolds with intramedullary nail fixation for creating stable osteogenic microenvironment was applied to repair large segmental bone defects(3.0 cm in length)in goat femur *** material characterization results showed that the BCP scaffold had the initial compressive strength of over 2.0 MPa,and total porosity of 84%.The cell culture experiments demonstrated that the scaffold had the excellent ability to promote the proliferation and osteogenic differentiation of rat bone marrow-derived mesenchymal stem cells(BMSCs).The in vivo results showed that the intramedullary nail fixation maintained the initial stability and structural integrity of the implants at early stage,promoting the osteogenic process both guided and induced by the BCP *** 9 months postoperatively,good integration between the implants and host bone was observed,and a large amount of newborn bones formed,accompanying with the degradation of the *** 18 months postoperatively,almost the complete new bone substitution in the defect area was *** maximum bending strength of the repaired bone defects reached to the 100% of normal femur at 18 months *** results demonstrated the good potential of osteoinductive BCP bioceramics in the regenerative repair of large load-bearing bone *** current study could provide an effective method to treat the clinical large segmental bone defects.

关键词： Calcium phosphate bioceramics Large segmental bone defects Bone regenerative repair Osteoinduction Mechanical stability

Parameter identification of the fractional-order systems based on a modified PSO algorithm

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Journal of Southeast University(English Edition) 2018年第1期34卷 6-14页

作者： Liu Lu Shan Liang Jiang Chao Dai Yuewei Liu Chenglin Qi Zhidong School of Automation Nanjing University of Science and TechnologyNanjing 210094China Key Laboratory of advanced Process Control for Light Industry of Ministry of education Jiangnan UniversityWuxi 214122China

In order to better identify the parameters of the fractional-order system,a modified particle swarm optimization(MPSO)algorithm based on an improved Tent mapping is *** MPSO algorithm is validated with eight classical test functions,and compared with the POS algorithm with adaptive time varying accelerators(ACPSO),the genetic algorithm(GA),a d the improved PSO algorithm with passive congregation(IPSO).Based on the systems with known model structures a d unknown model structures,the proposed algorithm is adopted to identify two typical fractional-order *** results of parameter identification show that the application of average value of position information is beneficial to making f 11 use of the information exchange among individuals and speeds up the global searching *** introducing the uniformity and ergodicity of Tent mapping,the MPSO avoids the extreme v^ue of position information,so as not to fall into the local optimal *** brief the MPSOalgorithm is an effective a d useful method with a fast convergence rate and high accuracy.

关键词： particle swarm optimization Tent mapping parameter identification fractional-order systems passive congregation

Tunable Luminescence Properties and Elucidating the Electronic Structures of Single-Phase Spherical BaWO 4:Dy^(3+),Tm^(3+),Eu^(3+)Phosphors for Warm-White-Lighting

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Journal of Renewable Materials 2022年第2期10卷 431-451页

作者： Zun Bi Ke Jia Yunfei Liu Yinong Lyu State Key Laboratory of Materials–Orient Chemical Engineering College of Materials Science and EngineeringNanjing Tech UniversityNanjingChina Jiangsu National Synergetic Innovation Center for advanced Materials(SICAM) NanjingChina Jiangsu Collaborative Innovation Center for advanced Inorganic Function Composites NanjingChina

A series of uniform single-phase spherical BaWO 4:Dy^(3+),Tm^(3+),Eu^(3+)phosphors were prepared via a microwave hydrothermal method by using trisodium citrate dehydrate as *** phase structure,morphology and photoluminescence properties were measured by powder X-ray diffraction,scanning electron microscope and fluorescence spectrometer,*** results show that uniform spherical microcrystals with diameters in the range of 2–4μm are *** the phase and morphology of samples are not significantly changed by doping rare earth(RE^(3+))*** the excitation wavelength of 356 and 365 nm,the samples BaWO 4:0.03Dy^(3+),yTm^(3+)can emit cold white *** order to lower the correlated color temperature(CCT)to get a warm white light,the Eu^(3+)ions were doped into BaWO 4:0.03Dy^(3+),0.01Tm^(3+).Especially,under the excitation of 365 nm,BaWO 4:0.03Dy^(3+),0.01Tm^(3+),0.03Eu^(3+)phosphor shew a bright warm white light with color coordi-nate of(0.4013,0.3629)and CCT of 3288 ***,in the BaWO 4:Dy^(3+),Tm^(3+),Eu^(3+)phosphors,the energy transfer mechanism among Dy^(3+),Tm^(3+)and Eu^(3+)ions have been discussed and the change of electron structures have been calculated by first-principles *** results shew that the uniform single-phase spherical BaWO 4:Dy^(3+),Tm^(3+),Eu^(3+)phosphors could be favorable candidates in warm white LEDs.

关键词： Barium tungstate microwave hydrothermal method spherical warm white lighting electron structures

Advances in coatings on magnesium alloys for cardiovascular stents-A review

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Bioactive Materials 2021年第12期6卷 4729-4757页

作者： Zhao-Qi Zhang Yong-Xin Yang Jing-An Li Rong-Chang Zeng Shao-Kang Guan School of Material Science and Engineering&Henan Key Laboratory of advanced Magnesium Alloy&Key Laboratory of Materials Processing and Mold Technology(Ministry of education) Zhengzhou University100 Science RoadZhengzhou450001PR China Corrosion Laboratory for Light Metals College of Material Science and EngineeringShandong University of Science and TechnologyQingdao266590China

Magnesium(Mg)and its alloys,as potential biodegradable materials,have drawn wide attention in the cardiovascular stent field because of their appropriate mechanical properties and ***,the occurrence of thrombosis,inflammation,and restenosis of implanted Mg alloy stents caused by their poor corrosion resistance and insufficient endothelialization restrains their anticipated clinical *** surface treatment tactics have mainly striven to modify the Mg alloy for inhibiting its degradation rate and enduing it with biological *** review focuses on highlighting and summarizing the latest research progress in functionalized coatings on Mg alloys for cardiovascular stents over the last decade,regarding preparation strategies for metal oxide,metal hydroxide,inorganic nonmetallic,polymer,and their composite coatings;and the performance of these strategies in regulating degradation behavior and *** research direction is also concisely discussed to help guide biological functionalized strategies and inspire further *** is hoped that this review can give assistance to the surface modification of cardiovascular Mg-based stents and promote future advancements in this emerging research field.

关键词： Magnesium alloy Cardiovascular stent Surface modification Rapid endothelialization Functional properties

In situ single iron atom doping on Bi_(2)WO_(6)monolayers triggers efficient photo-fenton reaction

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Environmental Science and Ecotechnology 2024年第4期20卷 315-322页

作者： Wei Liu Peifang Wang Juan Chen Xin Gao Huinan Che Xiaozhi Su Bin Liu Yanhui Ao Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of EducationCollege of EnvironmentHohai UniversityNo.1Xikang RoadNanjing210098China School of Chemical and Biomedical Engineering Nanyang Technological UniversitySingapore637459Singapore Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai201204China

Developing an efficient photocatalytic system for hydrogen peroxide(H_(2)O_(2))activation in Fenton-like processes holds significant promise for advancing water purification ***,challenges such as high carrier recombination rates,limited active sites,and suboptimal H_(2)O_(2)activation efficiency impede optimal *** we show that single-iron-atom dispersed Bi_(2)WO_(6)monolayers(SIAD-BWOM),designed through a facile hydrothermal approach,can offer abundant active sites for H_(2)O_(2)*** SIAD-BWOM catalyst demonstrates superior photo-Fenton degradation capabilities,particularly for the persistent pesticide dinotefuran(DNF),showcasing its potential in addressing recalcitrant organic *** reveal that the incorporation of iron atoms in place of tungsten within the electron-rich[WO_(4)]^(2-)layers significantly facilitates electron transfer processes and boosts the Fe(II)/Fe(III)cycle *** experimental investigations and theoretical analyses further elucidate how the atomically dispersed iron induces lattice strain in the Bi_(2)WO_(6)monolayer,thereby modulating the d-band center of iron to improve H_(2)O_(2)adsorption and *** research provides a practical framework for developing advanced photo-Fenton catalysts,which can be used to treat emerging and refractory organic pollutants more effectively.

关键词： H_(2)O_(2)activation Water treatment Bismuth tungstate Photo-fenton catalysts Emerging organic pollutants