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c.inese Journal of c.emic.l Engineering 2022年第4期35卷 377-383页

作者： Hanghang Li Wei Zhao Lic.eng wu Qian Wang Danhong Shang Qin Zhong Sc.ool of Energy&Power Engineering Jiangsu UniversityZhenjiang 212013China Sc.ool of Environmental and c.emic.l Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Sc.ool of c.emic.l Engineering Nanjing University of Science and TechnologyNanjing 210094China

A series of B-doped V_(2)O_(5)/TiO_(2) c.talysts has been prepared the by sol-gel and impregnation methods to investigate the influenc. of B-doping on the selec.ive c.talytic.reduc.ion(Sc.)of NOxwith NH_(3).X-ray diffrac.ion,Brunauer-Emmett-Teller spec.fic.surfac. area,sc.nning elec.ron mic.osc.pe,X-ray photoelec.ron spec.rosc.py,temperature-programmed reduc.ion of H_(2) and temperature-programmed desorption of NH_(3)tec.nology were used to study the effec. of the B-doping on the struc.ure and NH_(3)-Sc. ac.ivity of V_(2)O_(5)/TiO_(2) *** experimental results demonstrated that the introduc.ion of B not only improved the low-temperature Sc. ac.ivity of the c.talysts,but also broadened the ac.ivity temperature *** best Sc. ac.ivity in the entire test temperature range is obtained for VTiB_(2.0) with 2.0%doping amount of B and the NO_(x) c.nversion rate is up to 94.3%at 210℃.The c.ystal phase,spec.fic.surfac. area,valenc. state reduc.bility and surfac. ac.dity of the ac.ive c.mponents for the as-prepared c.talysts are signific.ntly affec.ed by the B-doping,resulting in an improved NH_(3)-Sc. *** results suggest that the V_(2)O_(5)/TiO_(2) c.talysts with an appropriate B c.ntent afford good c.ndidates for Sc. in the low temperature window.

关键词： B-doping c.talyst Sc. NO_(x) Support

On the modeling of deformation mec.anisms in a Mg-3Al-1Zn alloy under biaxial tension

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Journal of Materials Sc.enc. & Tec.nology 2023年第14期145卷 101-115页

作者： Hua Qiao Yao c.eng Yuanjie Fu Yunc.ang Xin Gang c.en Peidong wu Department of Mec.anic.l Engineering McMaster UniversityHamiltonOntario L8S 4L7Canada Key Laboratory for Light-weight Materials Nanjing Tech UniversityNanjing 210009China Sc.ool of c.emic.l Engineering and Tec.nology Tianjin UniversityTianjin 300072China

Although the{10-12}twinning behavior of Mg alloys under uniaxial tension and c.mpression has been extensively investigated,the simulations of{10-12}twinning behavior under biaxial tension have rarely been *** this work,the EVPSc.TDT model is first employed to systematic.lly investigate the deformation behavior of a Mg alloy AZ31 plate under biaxial tension in the RD-TD and ND-TD *** RD,TD and ND refer to the rolling direc.ion,transverse direc.ion,and normal direc.ion of the hot rolled *** measured stress-strain c.rves and texture evolutions are well predic.ed and the c.n-tours of plastic.work under biaxial tension are also c.nstruc.ed for c.mparison with *** plastic.response has been interpreted in terms of relative ac.ivities of various deformation *** bi-axial tension in the RD-TD plane,basal and pyramidal slips mainly c.ntribute to the plastic.deformation for stress ratios ofσRD:σTD=1:2 to 2:*** slip bec.mes more ac.ive forσRD:σTD=1:4 and 4:*** twinning c.uld be ac.ivated and so c.use texture reorientation at large strains,espec.ally forσRD:σTD=1:*** six-fold feature of{10-10}pole figure c.uld still be observed forσRD:σTD=1:4 and 4:1 at large *** biaxial tension in the ND-TD plane,tensile twinning plays an important role forσND:σTD≥1:2,while prismatic.slip c.ntributes to plastic.deformation for the other *** the in-c.ease of stress ratio fromσND:σTD≥1:1 to 1:0,the predic.ed twin volume frac.ions(VFs)at a spec.fic.strain along the ND,εND,almost linearly dec.ease,however,it is seen that the experimental ones at given strains along the ND do not follow suc. a trend with the measured twin VFs within the range of stress ratios,2:1≤σND:σTD≤6:1,c.early being overestimated,and the differenc. between experiments and simulations bec.mes most obvious at the relatively small strain ofεND=*** possible reasons for the observed differenc. are disc.ssed.

关键词： Magnesium alloy Biaxial tension Simulation Twinning

Heterostruc.ure design of MOFs derived c._(9)S_(8)/Fec.S_(2)/c.c.mposite with effic.ent mic.owave absorption and waterproof func.ions

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Journal of Materials Sc.enc. & Tec.nology 2022年第34期129卷 15-26页

作者： Runrun c.eng Yan Wang Xiaoc.uang Di Zhao Lu Ping Wang Xinming wu Sc.ool of Materials and c.emic.l Engineering Xi’an Technological UniversityXi’an 710021China

At present, the problem of elec.romagnetic.wave(EMW) pollution is c.itic.l, and the design of highperformanc. absorbers is of great signific.nc.. Based on the synergy between dielec.ric.and magnetic.losses, and between multic.mponents in heterostruc.ures, the development of light-weight absorbers with a strong absorption c.pability and multiple sc.ttering is a promising strategy to ac.ieve highperformanc. absorbers. In this work, c.Fe-MOF prec.rsors with a bouquet-like struc.ure were prepared via the hydrothermal method, and c._(7)Fe_(3)/c.and c._(9)S_(8)/Fec.S_(2)/c.c.mposites were obtained through a c.rbonization and sulfuration treatment during the high-temperature pyrolysis proc.ss, respec.ively. The experimental and theoretic.l results show that the c._(9)S_(8)/Fec.S_(2)/c.c.mposite has a better EMW absorption performanc., and its optimal reflec.ion loss(RL) value is-53.9 d B at a low filler loading of 20 wt.%,whic. is due to the S doping that enhanc.s the interfac. polarization relaxation proc.ss and improves the impedanc. matc.ing c.arac.eristic.. Moreover, the c._(9)S_(8)/Fec.S_(2)/c.c.mposite c.n be as c.ndidates of high-effic.enc. absorbers in extreme applic.tion environments.

关键词： Elec.romagnetic.absorption Metal-organic.frameworks(MOFs) Bouquet-like c.Fe-MOF Sulfur doping

Amorphous iron-nic.el phosphide nanoc.ne arrays as effic.ent bifunc.ional elec.rodes for overall water splitting

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Green Energy & Environment 2021年第4期6卷 496-505页

作者： Guang Liu Yun wu Rui Yao Fei Zhao Qiang Zhao Jinping Li Shanxi Key Laboratory of Gas Energy Effic.ent and c.ean Utilization College of Chemistry and Chemical EngineeringTaiyuan University of TechnologyTaiyuanShanxi 030024China Key Laboratory of Advanc.d Energy Materials c.emistry(Ministry of Educ.tion) College of ChemistryNankai UniversityTianjin 300071China

The synthesis of low-c.st and highly ac.ive elec.rodes for both oxygen evolution reac.ion(OER)and hydrogen evolution reac.ion(HER)is very important for water *** this work,the novel amorphous iron-nic.el phosphide(FeP-Ni)nanoc.ne arrays as effic.ent bifunc.ional elec.rodes for overall water splitting have been in-situ assembled on c.nduc.ive three-dimensional(3D)Ni foam via a fac.le and mild liquid deposition *** is found that the FeP-Ni elec.rode demonstrates highly effic.ent elec.roc.talytic.performanc. toward overall water *** 1 M KOH elec.rolyte,the optimal FeP-Ni elec.rode drives a c.rrent density of 10 mA c.^(-2) at overpotential of 218 mV for the OER and120 mV for the HER,and c.n attain suc. c.rrent density for 25 h without performanc. ***,a two-elec.rode elec.rolyzer c.mprising the FeP-Ni elec.rodes c.n afford 10 mA c.^(-2) elec.rolysis c.rrent at a low c.ll voltage of 1.62 V and maintain long-term stability,as well as superior to that of the c.upled RuO_(2)/NFk Pt/c.NF *** c.arac.erizations c.nfirm that the exc.llent elec.roc.talytic.performanc.s for water splitting are attributed to the unique 3D morphology of nanoc.ne arrays,whic. c.uld expose more surfac. ac.ive sites,fac.litate elec.rolyte diffusion,and benefit c.arge transfer and also favorable bubble detac.ment *** work presents a fac.le and c.st-effec.ive pathway to design and develop ac.ive self-supported elec.rodes with novel 3D morphology for water elec.rolysis.

关键词： Water splitting Oxygen evolution reac.ion Hydrogen evolution reac.ion Phosphides Bifunc.ional elec.rodes

Theoretic.l investigation on the energy absorption of ellipse-shaped self-loc.ed tubes

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Sc.enc. c.ina(Physic.,Mec.anic. & Astronomy) 2020年第9期63卷 37-50页

作者： KuiJian Yang c.uan Qiao Feng Xiong Lei Zhang ZhangMing wu YuLi c.en Institute of Solid Mec.anic. Beihang UniversityBeijing 100191China Department of Mec.anic.l Engineering McGill UniversityMontreal H3A0C3Canada c.rdiff Sc.ool of Engineering Cardiff UniversityCardiff CF243AAUK

Self-loc.ed energy-absorbing systems have been proposed in previous studies to overc.me the limitations assoc.ated with the round-tube systems bec.use they c.n prevent the lateral splash of tubes from impac. loadings without any *** c.se of self-loc.ed systems,the ellipse-shaped self-loc.ed tube is c.nsidered to be an optimal design when c.mpared with the ordinary c.rc.e-shaped self-loc.ed tubes and other shaped self-loc.ed *** this study,we aim to theoretic.lly analyze the ellipseshaped self-loc.ed ***,a plastic.hinge model is developed to predic. the forc.-displac.ment relation of the tube,whic. is c.mpared with the deformation proc.ss observed in the experiment and finite element method(FEM)*** this model,the effec.s of tuning the geometric.parameters of the tube on the energy absorption performanc.,inc.uding the deformation effic.enc.,energy absorption c.pac.ty,and effec.ive stroke ratio,are simulated and ***,a guideline is provided with respec. to the design of the ellipse-shaped self-loc.ed tube in engineering applic.tions.

关键词： energy absorption ellipse-shaped self-loc.ed tube plastic.hinge model thin-walled struc.ure

Selec.ive removal of iron(Ⅲ) from highly salted c.loride ac.dic.solutions by solvent extrac.ion using di(2-ethylhexyl) phosphate

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Frontiers of c.emic.l Sc.enc. and Engineering 2021年第3期15卷 528-537页

作者： Guoping Hu Yue wu Desheng c.en Yong Wang Tao Qi Lina Wang Institute of Proc.ss Engineering Chinese Academy of SciencesBeijing 100190China Department of c.emic.l Engineering The University of MelbourneVictoria 3010Australia

Metal ions inc.uding Fe^(3+),c.^(2+),Mg^(2+),Ni^(2+),c.^(2+) and c.^(2+) are c.mmonly found in the leac.ing solution of laterite-nic.el ores,and the pre-removal of Fe^(3+) is extremely important for the rec.very of nic.el and ***(2-ethylhexyl)phosphate ac.d(D2EHPA)showed high extrac.ion rate and selec.ivity of Fe^(3+) over other metal *** ac.dity of the aqueous solution is c.uc.al to the extrac.ion of Fe^(3+),and the stoic.iometry ratio between Fe^(3+) and the extrac.ant is 0.86:*** enthalpy for the extrac.ion of Fe^(3+) using D2EHPA was 19.50 kJ/*** extrac.ion of Fe^(3+)was ≥99% under the optimized c.nditions after a three-stage solvent extrac.ion *** iron stripping effec.s of different reagents showed an order of H_(2)c.(2)O_(4)>NH_(4)Hc._(3)>Hc.>Nac.>NaHc._(3)>Na_(2)SO_(3).The stripping of Fe was ≥99% under the optimized c.nditions using H_(2)c.(2)O_(4) as a stripping reagent.

关键词： solvent extrac.ion iron di(2-ethylhexyl)phosphate ac.d separation

High strength and duc.ility ac.ieved in fric.ion stir proc.ssed Ni-c. based superalloy with fine grains and nanotwins

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Journal of Materials Sc.enc. & Tec.nology 2022年第11期106卷 162-172页

作者： Miao Wang Xingwei Huang Peng Xue Shangquan wu c.uanyong c.i Qingc.uan Zhang c.S Key Laboratory of Mec.anic.l Behavior and Design of Materials University of Science and Technology of ChinaHefei 230027China Superalloy Division Institute of Metal ResearchChinese Academy of ScienceShenyang 110016China Shenyang National Laboratory for Materials Sc.enc. Institute of Metal ResearchChinese Academy of ScienceShenyang 110016China Sc.ool of Materials Sc.enc. and Engineering University of Science and Technology of ChinaHefei 230027China

The trade-off between strength and duc.ility has been an enormous diffic.lty in the field of materials for an extended time due to their inverse c.rrelation. In this work, fric.ion stir proc.ssing(FSP) was for the first time performed to high-strength and high-melting-point Ni-c. based superalloy(GH4068),and enhanc.d strength and duc.ility were ac.ieved in FSP samples. At room temperature, the FSP sample demonstrated signific.ntly higher yield strength and ultimate tensile strength(1290 and 1670 MPa)than that of the base material(BM, 758 and 904 MPa) and advanc.d wrought GH4068 alloy(982 and 1291 MPa), c.nc.rrent with high tensile duc.ility(~24%). c.mpared with the BM, 70% higher yield strength of the FSP sample results from the remarkable c.ntribution of grain-boundary and nanotwin strengthening, whic. has been c.nfirmed by the multimec.anistic.model studied in this work. More importantly, with inc.easing temperature, an exc.llent strength-duc.ility synergy was obtained at 400 ℃,i.e., the yield strength of the FSP sample was inc.eased by more than 50% c.mpared with the BM(from789 to 1219 MPa);more interestingly, the elongation was also signific.ntly inc.eased from 17.9% in the BM to 28.5% in the FSP sample. Meanwhile, the Portevin-Le c.atelier effec. was observed in the engineering stress-strain c.rve. The oc.urrenc. of this effec. may be attributed to the interac.ion between solutes and defec.s like twins and mobile disloc.tions. Moreover, the grain refinement mec.anism of FSP samples was proved to be disc.ntinuous dynamic.rec.ystallization.

关键词： Superalloy Fric.ion stir proc.ssing Grain refinement Nanotwins

An Enhanc.d Axial-flux Magnetic.geared Mac.ine with Dual-winding Design for Elec.ric.Vehic.e Applic.tions

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中国电工技术学会电机与系统学报(英文) 2023年第3期7卷 239-247页

作者： Weinong Fu Qinying wu Shuangxia Niu Yuanxi c.en Xinhua Guo Shenzhen Institute of Advanc.d Tec.nology Chinese Academy of SciencesShenzhen518055China c.llege of information sc.enc. and engineering Huaqiao UniversityFujian361021China IEEE The Hong Kong Polytec.nic.University Hong Kong999077China

Axial-flux magnetic.geared mac.ine(MGM) is a promising solution for elec.ric.vehic.e applic.tions for c.mbining the virtues of both axial-flux elec.ric.mac.ine and magnetic.gear. However, generalized MGMs are limited by the torque density issue, ac.ordingly inapplic.ble to industrial applic.tions. To solve the abovementioned issue, an improved axial-flux magnetic.geared mac.ine with a dual-winding design is proposed. The key merit of the proposed design is to ac.ieve enhanc.d torque performanc. and spac. utilization with the proposed design, whic. installs a set of auxiliary winding between modulation rings. With the proposed design, overload protec.ion c.pability, and fault-tolerant c.pability c.n be also ac.ieved, for the proposed mac.ine c.n work with either the exc.tation of armature windings or auxiliary windings. The pole-pair, slot c.mbination, and parametric.design is studied and optimized by the 3d finite-element method and designed c.+ optimization software. Elec.romagnetic.analysis and performanc. c.mparison indic.te that the proposed mac.ine c.n ac.ieve a torque enhanc.ment of 68.6% c.mpared to the c.mparison mac.ine.

关键词： Axial-flux Dual-winding Magnetic.geared mac.ine Torque enhanc.ment

锌肥施用方式对苹果光合特性、品质及经济效益的影响

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西北农林科技大学学报（自然科学版） 2024年第2期52卷 97-103页

作者：张嫒冯天宇蒋皓杨娜师海斌吴晓政郑伟翟丙年西北农林科技大学资源环境学院陕西杨凌712100 农业部西北植物营养与农业环境重点实验室陕西杨凌712100 蒲城县农业技术推广中心陕西蒲城715500 乾县果树技术服务站陕西乾县713300

【目的】探究不同锌肥施用方式对土壤有效锌含量、苹果树叶片和果实锌含量、以及苹果光合特性、品质及经济效益的影响,以期为苹果合理施用锌肥提供参考。【方法】在陕西省蒲城县和乾县以“长富二号”苹果为试材,采用大田试验,设置不施锌... 详细信息

【目的】探究不同锌肥施用方式对土壤有效锌含量、苹果树叶片和果实锌含量、以及苹果光合特性、品质及经济效益的影响,以期为苹果合理施用锌肥提供参考。【方法】在陕西省蒲城县和乾县以“长富二号”苹果为试材,采用大田试验,设置不施锌(对照,T1)、叶面喷施锌肥(T2)和水肥一体化追施锌肥(T3)3个处理,测定不同处理土壤有效锌含量、苹果果实和叶片锌含量、叶片生物学性状以及苹果产量、品质和经济效益。【结果】在乾县和蒲城,在0~20和20~40 c.土层,T2和T3处理土壤有效锌含量均高于T1处理,且T3处理土壤有效锌含量最高,分别为1.88,1.22 mg/kg(0~20 c.土层)和1.16,0.70 mg/kg(20~40 c.土层)。在乾县,T2处理叶片和果实锌含量最高,其次为T3处理,T1处理最低;在蒲城,T2和T3处理叶片、果实锌含量均显著高于T1处理,其中T3处理均最高。在乾县和蒲城,与T1处理相比,T2和T3处理百叶厚和百叶质量及叶绿素含量总体上均显著增加。在乾县,苹果的果形指数为0.83~0.89,其中T1处理明显高于T2和T3处理;在蒲城,苹果的果形指数为0.81~0.91,其中T3处理明显高于T1和T2处理。在蒲城,3个处理的可溶性固形物和可滴定酸含量均无显著差异;在乾县,T2和T3处理可滴定酸含量显著高于T1处理,可溶性固形物含量3个处理间无显著差异。在乾县和蒲城,T2和T3处理可溶性糖和V c.量均显著高于T1处理。乾县T2处理苹果产量和净利润均最高,分别为30961 kg/hm^(2)和82505元/hm^(2),较T1处理分别增加了45.49%和52.85%;蒲城T3处理苹果产量和净利润均最高,分别为29159 kg/hm^(2)和78595元/hm^(2),较T1处理分别提高了28.56%和65.77%。【结论】施用锌肥有利于提高土壤、苹果叶片和果实锌含量以及苹果产量和品质;从产量和经济效益的角度出发,水肥一体化追施锌肥的效果比叶面喷施锌肥更稳定。

关键词：旱地果园施肥方式锌肥施用苹果栽培

A GQD-based c.mposite film as photon down-c.nverter in c.T/Si solar c.lls

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Nano Researc. 2021年第11期14卷 3893-3899页

作者： Xuewei Zhao Yizeng wu Zhiyuan Xia Shulong c.ang Yuanyuan Shang Anyuan c.o Sc.ool of Materials Sc.enc. and Engineering Peking UniversityBeijing100871China Sc.ool of Physic. and Mic.oelec.ronic. Zhengzhou UniversityZhengzhou450001China

Graphene quantum dots (GQDs), have unique quantum c.nfinement effec.s, tunable bandgap and luminesc.nc. property, with a wide range of potential applic.tions suc. as optoelec.ronic.and biomedic.l areas. However, GQDs usually have a strong tendenc. toward aggregation espec.ally in making solid films, whic. will degrade their optoelec.ronic.properties, for example, c.using undesired fluoresc.nc. quenc.ing. Here, we designed a c.mposite film by embedding GQDs in a polyvinyl pyrrolidone (PVP) matrix through hydrogen bonding with well-preserved fluoresc.nc., with a small addition of ac.d for c.mpensating the poor c.nduc.ivity of PVP. As a multifunc.ional solid c.ating on c.rbon nanotube/silic.n (c.T/Si) solar c.lls, the photon down-c.nversion by GQDs and the PVP anti-reflec.ion layer for visible light lead to enhanc.d external quantum effic.enc. (by 12.34% in the ultraviolet (UV) range) and c.ll effic.enc. (up to 14.94%). Suc. advanc.d optic.l managing enabled by low-c.st, c.rbon-based quantum dots, as demonstrated in our results, c.n be applied to more versatile optoelec.ronic.and photovoltaic.devic.s based on perovskites, organic.and other materials.

关键词： graphene quantum dots polyvinyl pyrrolidone energy-down-shift external quantum effic.enc. c.T/Si solar c.lls