简介：这份报纸为为敏化染料的太阳能电池(DSSC)经由一起沉淀为TiO2nanoparticles准备建模并且优化作为一条有效途径论述反应表面方法论(RSM)性能。钛(IV)二度--(acetylacetonate)di-isopropoxide(DIPBAT)，isopropanol和水分别地被用作先锋，溶剂和合作溶剂。象准备因素与的水，老化温度和锻烧温度的臼齿的比率主要并且粒子特征和表演上的相互作用效果被调查。粒子特征被X光检查diffractometry(XRD)以主要、第二等的尺寸，晶体取向和形态学决定并且扫描电子显微镜学(SEM)。乐队差距精力和DSSC的力量变换效率被用于表演研究。根据在反应表面方法论(RSM)的变化(ANOVA)的分析，所有三个独立参数是统计上重要的，最后的模型是精确的。模型在1:10:500的DIPBAT-to-isopropanol-to-water的臼齿的比率的最佳的条件下面预言了最大的力量变换效率(0.14%)，变老36潰獳獥楳湯的温度吗？

简介：Improvementonextinctionandpollutionemissionhavebecomeoneofthemostprominentresearchtopicsingasturbine.Itiswidelyrecognizedthatthefuel/airmixturedistributionintherecirculationzoneisacriticalfactorinimprovingleanblow-out(LBO)andignition.Thispaperproposedanewlowemissionschemewithfuelstagedcentrallyandhybridinjectortoimproveflameoutandemission.Arelativesmallamountoffuelentersintocentralpilotairblastatomizerburnerandthenatomizedbyinnerswirlair.Theremainingmajorityoffuelisdirectlyinjectedintovanechannelsoftheprimaryswirlerthroughaseriesofholeslocatedonthesidewallofthemainstage.Onlypilotstageisfueledunderignitionandleanflameoutcondition.Theuniformityoffuel/airmixturedistributionintheprimaryzoneofthenewdesigndecreasesNOXemission,meanwhilethefuelairmixtureinpilotrecirculationzoneislocallyrichtoimproveflameoutandignition.Experimentalinvestigationwasconductedtocomparethenewschemewithbaselinedesignofdual-swirlerintermsofLBOandignitioncharacteristicsunderthesameconditioninamulti-sectorcombustor.Itisfoundthatthefuel-airratioofignitionlimitandLBOdecreasewiththereferencevelocityincreasing.Theexperimentalresultsalsoshowthatthenewschemesuccessfullyimproveleanblow-outandbroadentheoperationrangeofthecombustor.Theexperimentalresultsindicatedthatthecentrallystagedschemecanwidentheoperationboundaryofthecombustorandcanprovideguidancefordesignandoptimizationofcombustionchamber.

简介：Recently,bismuthsulfide(Bi2S3)hasattractedmuchattentioninthethermoelectriccommunityowingtoitsabundance,lowcost,andadvancedproperties.However,itspoorelectricaltransportpropertieshavepreventedBi2S3devicesfromrealizinghighthermoelectricperformance.Inthiswork,ourmotivationistodecreasethelargeelectricalresistivity,whichisrecognizedastheoriginofthelowZTvalueinundopedBi2S3.Wecombinedmeltingandsparkplasmasintering(SPS)inacontinuousfabricationprocesstoproduceBi2S3–xSex(x=0,0.09,0.15,0.21)andBi2S2.85–ySe0.15Cly(y=0.0015,0.0045,0.0075,0.015,0.03)samples.OurresultsshowthatSealloyingatSsitescannarrowthebandgapandactivateintrinsicelectronconduction,leadingtoahighpowerfactorof~2.0μW·cm–1·K–2atroomtemperatureinBi2S2.85S0.15,about100timeshigherthanthatofundopedBi2S3.Moreover,ourfurtherintroductionofClatomsintotheSsitesresultedinasecond-stageoptimizationofcarrierconcentrationandsimultaneouslyreducedthelatticethermalconductivity,whichcontributedtoahighZTvalueof~0.6at723KforBi2S2.835Se0.15Cl0.015.OurresultsindicatethathighthermoelectricperformancecouldberealizedinBi2S3withearth-abundantandlow-costelements.

简介：二phenylethanoidglycosides(PhGs)被高效第一次从Plantagoasiatica的天线部分孤立并且净化用乙醇acetate-n-butanol-ethanol-water的离心的分区层析(HPCPC)(0.5:0.5:0.1:1，v/v/v/v)。化合物2的化合物1和293.8mg的45.6mg的一个总数从P的n-butanol摘录的1341mg被净化。asiatica。当由electrospray电离的plantamajoside和acteoside或isoacteoside多在否定离子模式上演双人脚踏车团spectrometry(ESI-MSn)，二PhGs的结构尝试性地被识别。

简介：Cu2ZnSnS4(CZTS)基于太阳能电池被microelectronic和photonic结构(AMPS-1D)的一个维的太阳能电池模拟软件分析数字地模仿。在模拟使用的设备结构是Al/ZnO:Al/nZn(O，S)/pCZTS/Mo。工作是在ZnO1xSx缓冲区层，它将产出更高的变换效率。由改变S/(S+O)比率x，在CZTS/Zn的传导乐队偏移量(CBO)(O，S)如果比率的完整的范围被考虑，接口能从0.23eV到1.06eV。当时，0.23eV的最佳的CBO能被完成ZnO1xSx缓冲区有S/(S+O)0.6的比率。太阳能电池效率首先与增加硫内容增加然后为x突然地减少>0.6，它由我们的建议的最佳的硫内容x=到达17.55%的最高的价值0.6。我们的结果在处理ZnO1x为高效率CZTS的Sx缓冲区层免职太阳能电池。

简介：Afewclassesoforganiccompoundsarepromisingelectrode-activematerialsduetotheirhighpowerandenergydensities,lowcost,environmentalfriendliness,andfunctionality.Inthepresentwork,thepossibilityofusingKlasonligninextractedfrombuckwheathusksasacathode-activematerialforaprimarylithiumbatteryhasbeeninvestigatedforthefirsttime.Thereactionmechanisminthelithium/ligninelectrochemicalcellwassuggestedbasedonthedeepgalvanostaticdischarge(upto0.005V)dataandcyclicvoltammetryresults.ThedependenceoftheelectrochemicalbehavioroftheKlasonligninonthemillingdegreewasevaluated.Themaximumspecificcapacityoftheligninisequalto600mAhg-1atadischargecurrentdensityof75μAcm-2.BeneficialeffectofthethermaltreatmentoftheKlasonlignincathodeat250°Conthecellperformancewasestablished.Itwasfoundthatthedischargecapacityofthecellincreasedby30%intherangefrom3.3to0.9Vforthetreatedcathodematerial.TheseresultsdemonstratetheprospectsofusingKlasonlignin-basedelectrochemicalcellsaslow-rateprimarypowersources.

简介：Owingtoitsthickness-modulateddirectenergybandgap,relativelystronglight–matterinteraction,anduniquenonlinearopticalresponseatalongwavelength,few-layerblackphosphorus,orphosphorene,becomesveryattractiveinultrafastphotonicsapplications.Herein,wesynthesizedagraphene/phosphorenenano-heterojunctionusingaliquidphase-strippingmethod.Tinylatticedistortionsingrapheneandphosphorenesuggesttheformationofanano-heterojunctionbetweengrapheneandphosphorenenanosheets.Inaddition,wesystematicallyinvestigatetheirnonlinearopticalresponsesatdifferentwavelengthregimes.Ourexperimentsindicatethatthecombinedadvantagesofultrafastrelaxation,broadbandresponseingraphene,andthestronglight–matterinteractioninphosphorenecanbecombinedtogetherbynano-heterojunction.Wehavefurtherfabricatedtwo-dimensional(2D)nano-heterojunctionbasedopticalsaturableabsorbersandintegratedthemintoanerbium-dopedfiberlasertodemonstratethegenerationofastableultrashortpulsedownto148fs.Ourresultsindicatethatagraphene/phosphorenenano-heterojunctioncanoperateasapromisingsaturableabsorberforultrafastlasersystemswithultrahighpulseenergyandultranarrowpulseduration.Webelievethisworkopensupanewapproachtodesigning2Dheterointerfacesforapplicationsinultrafastphotonicsandotherresearch.Thefabricationofa2Dnano-heterojunctionassembledfromstackingdifferent2Dmaterials,viathisfacileandscalablegrowthapproach,pavesthewayfortheformationandtuningofnew2Dmaterialswithdesirablephotonicpropertiesandapplications.

简介：Novelhierarchicalporouscarbonmembraneswerefabricatedthroughasimplecarbonizationprocedureofwell-definedblendingpolymermembraneprecursorscontainingthesourceofcarbonpolyacrylonitrile(PAN)andanadditiveofpolyvinylpyrrolidone(PVP),whichwaspreparedusingphaseinversionmethod.Theas-fabricatedmaterialswerefurtherusedastheactiveelectrodematerialsforsupercapacitors.TheeffectsofPVPconcentrationinthecastingsolutiononstructurefeatureandelectrochemicalcapacitiveperformanceoftheas-preparedcarbonmembraneswerealsostudiedindetail.Astheelectrodematerialforsupercapacitor,ahighspecificcapacitanceof278.0F/gcouldbeattainedatacurrentof5mA/cm2andabout92.90%capacityretentioncouldbemaintainedafter2000charge/dischargecyclesin2mol/LKOHsolutionwithaPVPconcentrationof0.3wt%inthecastingsolution.Thefacilehierarchicalporestructurepreparationmethodandthegoodelectrochemicalcapacitiveperformancemakethepreparedcarbonmembraneparticularlypromisingforuseinsupercapacitor.

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简介：ActivatedcarbonsforelectrochemicalcapacitorelectrodesarepreparedfromsoyabeanusingchemicalactivationwithKOH.TheporesizeiseasilycontrollablebychangingthemassratiobetweenKOHandcarbonizedproduct.Theas-preparedmaterialspossessalargespecificsurfacearea,uniquestructure,well-developedhierarchicalporosityandplentifulheteroatoms(mainlyOandN).Thusresultedinitshighspecificcapacitance,goodratecapacityandcyclingstability.Moreover,attributingtoworldwideavailability,renewablenatureandlow-cost,activatedcarbonpreparedfromsoyabeanhasagoodpotentialinenergyconversionandstoragedevices.

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简介：Acompositebeamissymmetricifboththematerialpropertyandsupportaresymmetricwithrespecttothemiddlepoint.Inordertostudythefreevibrationperformanceofthesymmetriccompositebeamswithdifferentcomplexnonsmooth/discontinuousinterfaces,wedevelopanR(x)-orthonormaltheory,whereR(x)isanintegrableflexuralrigidityfunction.TheR(x)-orthonormalbasesinthelinearspaceofboundaryfunctionsareconstructed,ofwhichthesecond-orderderivativesoftheboundaryfunctionsareaskedtobeorthonormalwithrespecttotheweightfunctionR(x).WhenthevibrationmodesofthesymmetriccompositebeamareexpressedintermsoftheR(x)-orthonormalbaseswecanderiveaneigenvalueproblemendowedwithaspecialstructureofthecoefficientmatrixA:=[aij],aij=0ifi+jisodd.Basedonthespecialstructurewecanprovetwonewtheorems,whichindicatethatthecharacteristicequationofAcanbedecomposedintotheproductofthecharacteristicequationsoftwosub-matriceswithdimensionshalflower.Hence,wecansequentiallysolvethenaturalfrequenciesinclosed-formowingtothespecialtyofA.Weusethispowerfulnewtheorytoanalyzethefreevibrationperformanceandthevibrationmodesofsymmetriccompositebeamswiththreedifferentinterfaces.

简介：Inthisstudy,anelectro-mechanicalvalve(EMV)systemfortheintakevalveofafourstroke,singlecylinder,overheadvalveandsparkignition(SI)enginewasdesignedandconstructed.AnenginewiththeEMVsystemandastandardengineweretestedtoobservetheeffectsoftheEMVonengineperformanceandemissionsatdifferentspeedsunderfullload.TheEMVengineshowedimprovedenginepower,enginetorqueandbreakspecificfuelconsumption(BSFC).A66%decreaseinCOemissionswasalsoobtainedwiththeEMVsystem,buthydrocarbons(HC)andNOxemissionsincreasedby12%and13%respectively.

简介：简单、快速、精确的高效液体色析法(HPLC)技术结合了化合光(CL)察觉为肾上腺素(E)，noradrenaline(NA)和多巴胺(DA)的同时的决心被开发。它在在发光氨和钾铁氰酸盐之间的CL反应上基于analyte改进效果。各种各样的参数的效果发光氨集中，pH价值和analytes(E，NA和DA)的色析法的行为上的活动阶段的部件例如钾铁氰酸盐集中，被调查。分离用0.01mol/L钾氢phthalate答案和甲醇的活动阶段在C18列上被执行(92:8，V/V)。在1愠?桰獹潩潬楧慣?潣摮瑩潩?眠楨档椠?的范围在最佳条件，E，NA和DA下面显示出好线性关系???鶍?????鐿?醭靠??颮題????鞪吗？？

简介：Micro-mesoporouscompositemolecularsievesH-ZSM-5/MCM-41werepreparedbythehydrothermaltechniquewithalkali-treatedH-ZSM-5zeoliteasthesourceandcharacterizedbyscanningelectronmicroscopy,transmissionelectronmicroscopy,energydispersivespectroscopy,X-raydiffraction,N2adsorption-desorptionmeasurementandNH3temperature-programmeddesorption.ThecatalyticperformancesforthemethanoldehydrationtodimethyletheroverH-ZSM-5/MCM-41wereevaluated.Amongthesecatalysts,H-ZSM-5/MCM-41preparedwithNaOHdosage(nNa/nSi)varyingfrom0.4to0.47presentedexcellentcatalyticactivitywithmorethan80%methanolconversionand100%dimethyletherselectivityinawidetemperaturerangeof170—300℃,andH-ZSM-5/MCM-41preparedwithnNa/nSi=0.47showedconstantmethanolconversionofabout88.7%,100%dimethyletherselectivityandexcellentlifetimeat220℃.Theexcellentcatalyticperformanceswereduetothehighlyactiveanduniformacidicsitesandthehierarchicalporosityinthemicro-mesoporouscompositemolecularsieves.ThecatalyticmechanismofH-ZSM-5/MCM-41forthemethanoldehydrationtodimethyletherprocesswasalsodiscussed.

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简介：Theenantiomersofthirty-nineO-ethylO-phenylN-isopropylphosphoroamidothioateshavebeenseparatedbyhighperformanceliquidchromatographyonaPirklemodelchiralstationaryphaseusingtenmobilephase.Chromatographicdataarepresentedfortheseparationoftheseorganicphosphorusenantiomersonthechiralphase.Theinfluencesofmolecularstructuresandcompositionsofmobilephaseshavebeendescribed.

简介：Non-noblemetal-basedcatalysts,especiallystableones,havegainedincreasingattentionsinthefieldofelectronicallycatalytichydrogenevolutionreaction(HER).Inthiswork,anN-dopedcarbonconfinedCo–Nialloywithreducedgrapheneoxide(rGO)decoration(CoNi@N-C/rGO)wasfabricatedforHER.ThepreparedcatalystexhibitedexcellentHERactivityinanacidicelectrolyte(Tafelslopeof~133.7mV).TheresultsshowedthattheenhancedHERperformanceofthenanostructuresisattributedtothechemicalandelectronicsynergiceffectbetweentheconfinedCo–NialloyandrGO.Stabilitytests,realizedvialongtermpotentialcyclesandextendedelectrolysis,providedtheconfirmationoftheexceptionaldurabilityofthecatalyst,whichoriginatedfromtheconfiningeffectoftheN-dopedcarbonshell.Thisversatilemethodprovidesastrategyfordesigningstablenon-preciousmetalelectrocatalystsconfinedbycarboncoating.

简介：Aseriesofamine-basedadsorbentsweresynthesizedusingsiliceousMCM-41individuallyimpregnatedwithfourdifferentamines(ethylenediamine(EDA),diethylenetriamine(DETA),tetraethylenepentamine(TEPA)andpentaethylenehexamine(PEHA))tostudytheeffectofaminechainlengthandloadingweightontheirCO2adsorptionperformancesindetail.TheadsorbentswerecharacterizedbyFT-IR,elementalanalysis,andthermo-gravimetricanalysistoconfirmtheirstructureproperties.Thermo-gravimetricanalysiswasalsousedtoevaluatetheCO2adsorptionperformanceofadsorbents.Longerchainamine-basedmaterialscanachievehigheramineloadingsandshowbetterthermalstability.TheCO2adsorptioncapacitiesatdifferenttemperaturesindicatethattheCO2adsorptionisthermodynamicallycontrolledoverEDAMCM41andDETA-MCM41,whiletheadsorptionoverTEPA-MCM41andPEHA-MCM41isunderkineticcontrolatlowtemperature.ThechainlengthofaminesaffectstheCO2adsorptionperformanceandtheadsorptionmechanismsignificantly.TheresultsalsoindicatethatCO2adsorptioncapacitycanbeenhanceddespiteofhighoperationtemperatures,ifappropriateamines(TEPAandPEHA)areapplied.However,adsorbentswithshortchainamineexhibithigheradsorptionanddesorptionratesduetothecollaborativeeffectofrapidreactionmechanismsofprimaryaminesandlessdiffusionresistanceofshorterchainlengthamines.

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