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Microstructures and mechanical properties of ferrite-based lightweight steel with different compositions

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Journal of Iron and Steel Research International 2017年第7期24卷 737-742页

作者： Reng-chong Xu Yan-lin He Hu Jiang Hua Wang Na-qiong zhu Xiao-gang Lu lin Li School of Materials Science and Engineering Shanghai University State Key Laboratory of Advanced Special Steel Shanghai University Instrumental Analysis & Research Center Shanghai University Materials Genome Institute Shanghai University

The microstructures and mechanical properties of ferrite-based lightweight steel with different compositions were investigated by tensile test,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,X-ray diffraction（XRD）and thermodynamic calculation（TC）.It was shown that the ferrite-based lightweight steels with 5wt.%or 8wt.%Al were basically composed of ferrite,austenite andκ-*** the annealing temperature increased,the content of the austenite in the steel gradually increased,while theκ-carbide gradually decomposed and finally *** mechanical properties of the steel with 5wt.%Al and 2wt.%Cr,composed of ferrite and Cr7C3carbide at different annealing temperatures,were significantly inferior to those of *** steel containing 5wt.%Al,annealed at 820°C for 50sthen rapidly cooled to 400°C and held for 180s,can obtain the best product of strength and elongation（PSE）of 31242MPa·%.The austenite stability of the steel is better,and its PSE is *** addition,the steel with higher PSE has a more stable instantaneous strain hardening exponent（n value）,which is mainly caused by the effect of transformation induced plasticity（TRIP）.When theκ-carbide or Cr7C3carbide existed in the microstructure of the steel,there was an obvious yield plateau in the tensile curve,while its PSE decreased significantly.

关键词： Ferrite-based lightweight steel Microstructure Mechanical property Transformation induced plasticity effect κ-carbide

Individualized minimally invasive treatment for adult testicular hydrocele: A pilot study

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World Journal of Clinical Cases 2019年第6期7卷 727-733页

作者： Le lin Huai-Shan Hong Yun-Liang Gao Jin-Rui Yang Tao Li Qing-Guo zhu Lie-Fu Ye yong-Bao Wei Shengli Clinical Medical College of Fujian Medical University Department of Urology Fujian Provincial Hospital Department of Urology the Second Xiangya HospitalCentral South University

BACKGROUND Hydrocelectomy is the gold standard for the treatment of hydrocele,but it often causes complications after surgery,including hematoma,infection,persistent swelling,hydrocele recurrence,and chronic pain. In recent years,several methods for minimally invasive treatment of hydrocele have been introduced,but they all have limitations. Herein,we introduce a new method of individualized minimally invasive treatment for *** To present a new method for the treatment of adult testicular *** Fifty-two adult patients with idiopathic testicular hydrocele were included. The key point of this procedure was that the scope of the resection of the sheath of the tunica vaginalis was determined according to the maximum diameter(d) of the effusion measured by ultrasound and the maximum diameter of the portion of the sheath pulled out of the scrotum was approximately πd/2. The surgical procedure consisted of a 2-cm incision in the anterior wall of the scrotum,drainage of the effusion,and dissection of part of the sheath of the tunica vaginalis. After the sheath was peeled away to the predetermined target extent,the pulled-out sheath was removed. The intraoperative findings and postoperative complications were *** All patients were successfully treated with a median operation time of 18 *** median maximum diameter of the effusion on ultrasound was 3.5 cm,and the median maximum diameter of the resected sheath was 5.5 cm. Complications occurred in four(7.7%) patients: two(3.8%) cases of mild scrotal edema,one(1.9%) case of scrotal hematoma,and one(1.9%) case of wound infection. All of the complications were grade I-II. Recurrent hydrocele,chronic scrotal pain,and testicular atrophy were not observed during a median follow-up of 12 *** We report a new technique for individualized treatment of testicular hydrocele,which is quantitative and minimally invasive and yields good outcomes. Further study is warranted to verify its potent

关键词： Testicular hydrocele Individual treatment Minimal invasion Complications Scrotoscope

Branched core-shell a-TiO_(2)@N-TiO_(2) nanospheres with gradient-doped N for highly efficient photocatalytic applications

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Chinese Chemical Letters 2023年第4期34卷 390-395页

作者： Qingsong Zhang Yang Xiao Liu Yang Yanjun Wen zhu Xiong lin Lei lin Wang Qingyi Zeng School of Resource&Environment and Safety Engineering University of South ChinaHengyang 421001China School of Chemistry and Chemical Engineering University of South ChinaHengyang 421001China Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of EducationSchool of Environmental Science and EngineeringGuangzhou UniversityGuangzhou 510006China Hunan Institute Of Traffic Engineering Hengyang 421001China

A branched core-shell nanosphere composed of an anatase TiO_(2)(a-TiO_(2)) core and a TiO_(2)nanobranch shell with gradient-doped N(a-TiO_(2)@N-TiO_(2)) is synthesized by a simple in situ doping method, in which mixed crystal anatase-rutile TiO_(2)(ar-TiO_(2)) nanosphere is first prepared by oxidizing Ti using H_(2)O_(2), and then is etched by NH_(3)·H_(2)O to form(NH_(4))2TiO_(3)nanobranches, which is converted into a-TiO_(2)@N-TiO_(2)following an ambient annealing process. The diameter of a-TiO_(2)core is ~500 nm, and the thickness of NTiO_(2)branched shell is ~100 nm with gradually increased N concentration from the bottom to the ***-thin amorphous coating layers on the branches are also observed. The morphology of the composites could be further tuned by the amount of NH_(3)·H_(2)O, and its effect on the photocatalytic performance is also investigated. The optimized a-TiO_(2)@N-TiO_(2)shows an outstanding hydrogen evolution rate of 308.1 μmol g^(-1)h^(-1)under air mass(AM) 1.5 illumination, and also exhibits highly active in photocatalytic degradation of various refractory organic pollutants, including organic dyes, phenols, antibiotics,and personal care products, with removal ratios higher than 96% after 2 h operation. This can be due to the gradient-doped N-TiO_(2)nanobranches, which not only provide bending band structure and defect level derived from the N impurities and O vacancies, resulting the formation of n-n+heterojunctions to improve the charge separation, but also enhance the charge transfer at the liquid-solid interface due to the numerous nanobranches and amorphous coating layers.

关键词： TiO_(2) Core-shell nanosphere N doping Gradient doping Photocatalytic H_(2)production

The Nucleon Direct Urca Processes in a Cooling Neutron Star

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Chinese Physics Letters 2013年第12期30卷 191-194页

作者： XU Yan LIU Guang-Zhou LIU cheng-Zhi FAN Cun-Bo WANG Hong-Yan zhu Ming-feng ZHAO En-Guang Changchun Observatory National Astronomical ObservatoriesChinese Academy of SciencesChangchun 130117 Center for Theoretical Physics Jilin UniversityChangchun 130012 College of Physics Beihua UniversityJilin 132013 Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190

In the relativistic mean field approximation,the relativistic energy losses of the nucleon direct Urca processes are studied in the degenerate baryon matter of neutron *** investigate the effects of hyperon degrees of freedom and the isovector scalar interaction which is considered by exchangingδmeson on the nucleon direct Urca processes in neutron star *** results indicate that the existence of hyperons decreases the abundance of protons and leptons and can sharply suppress the neutrino emissivity of the nucleon direct Urca processes,while it has only a little influence on the neutrino luminosity for a fixed neutron star whetherδmesons appear in a neutron star or ***,the presence ofδmesons can result in obvious growth in the neutrino emissivity and luminosity which will speed up the cooling rate for the nonsuperfluid neutron star.

关键词： meson relativistic sharply

Feasibility and safety of “bridging” pancreaticogastrostomy for pancreatic trauma in Landrace pigs

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World Journal of Gastrointestinal Surgery 2021年第5期13卷 419-428页

作者： Jian feng Hang-Yu Zhang Li Yan Zi-Man zhu Bin Liang Peng-Fei Wang Xiang-Qian Zhao yong-LiangChen Department of Hepatopancreatobiliary Surgery Peking University Shougang HospitalBeijing 100144China Faculty of Hepato-Pancreato-Biliary Surgery Institute of Hepatobiliary Surgery of Chinese PLAKey Laboratory of Digital Hepetobiliary SurgeryChinese PLA General HospitalBeijing 100853China

BACKGROUND In recent years,we created and employed a new anastomosis method,“bridging”pancreaticogastrostomy,to treat patients with extremely severe pancreatic *** surgery has advantages such as short length of surgery,low secondary trauma,rapid construction of shunts for pancreatic fluid,preventing second surgeries,and achieving good treatment outcomes in clinical ***,due to the limited number of clinical cases,there is a lack of strong evidence to support the feasibility and safety of this surgical ***,we carried out animal experiments to examine this procedure,which is reported *** To examine the feasibility and safety of a new rapid method of pancreaticogastrostomy,“bridging”*** Ten Landrace pigs were randomized into the experimental and control groups,with five pigs in each group.“Bridging”pancreaticogastrostomy was performed in the experimental group,while routine mucosa-to-mucosa pancreaticogastrostomy was performed in the control *** surgery,the general condition,amylase levels in drainage fluid on Days 1,3,5,and 7,fasting and 2-h postprandial blood glucose 6 mo after surgery,fasting,2-h postprandial peripheral blood insulin,and portal vein blood insulin 6 mo after surgery were *** was carried out at 1 and 6 mo after the former one to examine the condition of the abdominal cavity and firmness and tightness of the pancreaticogastric anastomosis and *** After surgery,the general condition of the animals was *** in the control group did not gain weight 6 mo after surgery,whereas significant weight gain was present in the *** were significant differences on Days 1 and 3 after surgery between the two groups but no differences on Days 5 and *** were no differences in fasting and 2-h postprandial blood glucose and fasting and 2-h insulin values of postprandial peripheral blood and portal vein blood 6 mo after surgery between the two ***

关键词： Pancreatic trauma Damage control surgery “Bridging”pancreaticogastrostomy Severe pancreatic injury Safety

Improving performance of Cs_(2)AgBiBr_(6)solar cell through constructing gradient energy level with deep-level hole transport material

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Rare Metals 2023年第9期42卷 3004-3012页

作者： Zi-Yang Xia Wei Zhang cheng Chen Hao-Xin Wang lin-Qin Wang Ya-Wei Miao Xing-Dong Ding Li-cheng Sun Ming cheng Institute for Energy Research School of Energy and Power EngineeringJiangsu UniversityZhenjiang212013China Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry School of ScienceWestlake UniversityHangzhou310024China

The valence band offset between Cs_(2)AgBiBr_(6)and hole transport layer(HTL)is approximately 1.00 e V,which results in high energy loss and is identified as one of the bottle necks of Cs_(2)Ag BiBr_(6)perovskite solar cell(PSC)for achieving high power conversion efficiency(PCE).To tackle this problem,we propose the optimization of the energy level alignment by designing and synthesizing novel deep-level hole transport materials(HTMs).The sole introduction of deep-level HTMs successfully reduces the valence band offset between Cs_(2)Ag Bi Br_(6)and HTL,but induces the increased valence band offset at HTL/Au interface,limiting the PCE *** further solve the problem and improve the PCE,the gradient energy level arrangement is constructed by combining the newly developed deep-level HTM 6,6’-(3-((9,9-dimethyl-9H-fluoren-3-yl)(4-methoxyphenyl)amino)thiophene-2,5-diyl)bis(N-(9,9-dimethyl-9H-fluoren-2-yl)-N,9-bis(4-methoxyphenyl)-9H-carbazol-3-amine)(TF)with 2,2’,7,7’-tetrakis(N,N’-dipmethoxyphenylamine)-9,9-spirobifluorene(Spiro-OMeTAD).Through optimization,an impressive PCE of 3.50%with remarkably high open-circuit voltage(V_(oc))and fill factor(FF)is achieved,qualifying it among the best pristine Cs_(2)AgBiBr_(6)PSCs.

关键词： All-inorganic Cs_(2)AgBiBr_(6)perovskite Stepped energy level structure Energy loss Moisture resistance

MXenes for perovskite solar cells:Progress and prospects

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Journal of Energy Chemistry 2023年第6期81卷 443-461,I0010页

作者： lin Yang Peng Li Jiangang Ma Xintong Zhang Xiao-feng Wang Yichun Liu Key Laboratory for UV-Emitting Materials and Technology of Ministry of Education Northeast Normal UniversityChangchun 130024JilinChina Key Laboratory of Physics and Technology for Advanced Batteries(Ministry of Education) College of PhysicsJilin UniversityChangchun 130012JilinChina

Perovskite solar cells(PSCs)have been developed over the past decade as the forefront of the state-of-theart photovoltaic technologies owing to their high efficiency and low cost,where nanostructured functional materials play key roles in performance *** a versatile class of two-dimensional(2D)materials,transition metal carbides/nitrides MXenes have gained enormous attentions in PSCs since 2018 due to their superior properties such as excellent metallic conductivity,abundant surface functional groups,tunable work functions,high optical transparency,and mechanical *** explorations of MXenes are of significance in performance promotion and commercialization expansion of *** such,this review focuses on the diversified advantages of MXenes,comprehensively summarizing their applications and developments in PSCs as additives,electron/hole transporting layers,interfacial engineering layers,and electrodes in sequence and explaining the relevant mechanisms ***,the problems emerged from the related studies are considered and the corresponding suggestions like opening up the type of MXenes usage,taking further insight of the modulation of surface termination groups on Fermi levels,understanding the effect on energy level structures of perovskite or other functional layers,and realizing commercialization,*** provided for the future in-depth *** review is intended to provide overall perspective of the current status of MXenes and highlight the direction for the future advancements in MXenes design and processes towards efficient,stable,large-area,and low-cost PSCs.

关键词： MXenes Two-dimensional materials Perovskite solar cells Photovoltaic technologies Environment

The practically renewable and highly efficient electrocatalysts derived from a newly-designed Mo_(8)Pt polyoxometalate compound

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Science China Chemistry 2023年第2期66卷 492-499页

作者： Di Yin Yun-Dong Cao Yi feng Guang-Gang Gao Hong Liu lin-lin Fan Zhen-Hui Kang School of Materials Science and Engineering University of JinanJinan250022China Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials and DevicesSoochow UniversitySuzhou215123China Macao Institute of Materials Science and Engineering(MIMSE) MUST-SUDA Joint Research Center for Advanced Functional MaterialsMacao University of Science and TechnologyTaipaMacao999078China

Platinum(Pt)catalysts are the most practical electrocatalysts;however,their low abundance and high cost severely limit their large-scale *** recovery is a key issue to be resolved before the use of Pt-based electrocatalysts can be broadly ***,the newly designed polyoxometalate[Pt^(II)(NH_(3))_(4)]_(2)[Mo_(8)O26](Mo_(8)Pt)acts as an ideal recycling medium for renewable and highly effective Pt *** from Mo_(8)Pt,by a facile reduction reaction,the formed Pt/Mo_(2)C/Mo_(2)N@C-N electrocatalyst shows superior electrocatalytic activity as compared to commercial Pt/C(20%)under both acidic and alkaline ***,the reaction of Pt/Mo_(2)C/Mo_(2)N@C-N in H_(2)O_(2)solution can regenerate Mo_(8)Pt for Pt *** is also demonstrated that the Pt electrocatalyst can be used for at least five rounds of recycling and regeneration,showing its efficiency and stability as well as its *** work highlights a recycling medium strategy to the new generation of renewable Pt-based catalysts.

关键词： platinum polyoxometalate electrocatalyst recycling-medium renewability

Exogenous calcium enhances the physiological status and photosynthetic capacity of rose under drought stress

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Horticultural Plant Journal 2024年第3期10卷 853-865页

作者： Xiaojuan Zhao Shang lin Shuang Yu Yichang Zhang lin Su Lifang Geng Chenxia cheng Xinqiang Jiang College of Landscape Architecture and Forestry Qingdao Agricultural UniversityQingdaoShandong 266000China College of Horticultural Qingdao Agricultural UniversityQingdaoShandong 266000China

Drought(water shortage)can substantially limit the yield and economic value of rose plants(Rosa spp.).Here,we characterized the effect of exogenous calcium(Ca^(2+))on the antioxidant system and photosynthesis-related properties of rose under polyethylene glycol 6000(PEG6000)-induced drought *** levels,as well as leaf and root biomass,were significantly reduced by drought;drought also had a major effect on the enzymatic antioxidant system and increased concentrations of reactive oxygen *** of exogenous Ca^(2+)increased the net photosynthetic rate and stomatal conductance of leaves,enhanced water-use efficiency,and increased the length and width of stomata following exposure to ***-specific physiological responses were observed under different concentrations of Ca^(2+).Application of 5 mmol·L^(-1)Ca^(2+)promoted photosynthesis and antioxidant activity in the leaves,and application of 10 mmol·L^(-1)Ca^(2+)promoted antioxidant activity in the *** of exogenous Ca^(2+)greatly enhanced the phenotype and photosynthetic capacity of potted rose plants following exposure to drought ***,our findings indicate that the application of exogenous Ca^(2+)enhances the drought resistance of roses by promoting physiological adaptation and that it could be used to aid the cultivation of rose plants.

关键词： Rosa hybrida L. Exogenous calcium Drought stress Physiological index Photosynthetic capacity