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简介：在水热条件下,制备了一种基于Keggin型多金属氧酸盐的银配合物[Ag（10）（NCA）4（PW9ⅥW3ⅤO（40））（H2O）4].通过元素分析、红外光谱和X-射线单晶衍射方法确定了该配合物的晶体结构.在合成过程中,3-（2-吡啶羧酸）酰胺-吡嗪配体（L）分解成烟酸NCA.结构分析表明：该化合物属于三斜晶系,P1空间群,晶胞参数a=1.18874（9）nm,b=1.24950nm,c=1.41103（10）nm,α=73.712（2）°,β=66.720（2）°,γ=83.467（2）°,V=1.8479（2）nm3,Z=1,R1=0.0731,ωR2=0.1974.配合物中含有一种六核银亚单元[Ag6（NCA）4]（2＋）,不同亚单元间通过配位水的氧原子连接形成一维双链结构,而一维双链进一步通过Ag—N键连接形成二维层状结构,二维层则通过[PW9ⅥW3ⅤO（40）]（6-）多阴离子形成最终的三维金属有机框架.标题配合物修饰的碳糊电极对H2O2和KNO2还原有好的电催化活性,而且该配合物对降解亚甲基蓝、罗丹明B分子有较高的光催化效率.

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简介：CO2photoreductionisanattractiveprocesswhichallowsthestorageofsolarenergyandsynthesisofsolarfuels.Manydifferentphotocatalyticsystemshavebeendeveloped,whilethealternativephoto-reactorsarestillinsufficientlyinvestigated.Inthiswork,photoreductionofCO2withH2OintoCH4wasinvestigatedinamodifiedconcentratingsolarreactor,usingTiO2andPt/TiO2asthecatalysts.TheTiO2andPt/TiO2sampleswereextensivelycharacterizedbydifferenttechniquesincludingpowderX-raydiffraction（XRD）,N2adsorption/desorptionandUV–visabsorption.ThecatalyticperformanceoftheTiO2andPt/TiO2samplesinthegasphasewasevaluatedunderunconcentratedandconcentratedXe-lamplightandnaturesolarlightwithdifferentconcentratingratios.VariousparametersofthereactionsystemandthecatalystswereinvestigatedandoptimizedtomaximizethecatalyticperformanceofCO2reductionsystem.Comparedwiththenormallightirradiation,theTiO2andPt/TiO2samplesshowhigherphotocatalyticactivity（about6–7times）forreducingCO2intoCH4underconcentratedXe-lamplightandnaturesolarlight.Intherangeofexperimentallightintensity,itisfoundthattheconcentrationofthelightmakesitsuitableforthecatalyticreaction,andincreasestheutilizationefficiencyoftheTiO2andPt/TiO2sampleswhiledoesnotdecreasethequantumefficiency.

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简介：在这研究，塑料闪烁器察觉者的不同参数被Geant4模拟工具箱调查。这些参数由PMT以及表面的半径，长度和位置组成了反射打并且完成选择。而且，二器官的塑料材料的反应时间分布被学习。结果显示收集光光子与PMT半径头一起有一种线性关系。另外，PMT的垂直地点与光光子收集有一种非线性的关系。然而，收集由增加PMT长度或动人的PMT头减少了水平位置。二塑料闪烁器材料的反应功能在对试验性的出版结果的好同意。另外，Geant4放射运输代码能模仿事件放射光子并且预言随后的事件到PMT头很好。结果显示BC-404有更快的焕发性质对BC-400器官的闪烁器材料。在Geant4产量之间的比较说明最好的反射镜材料和表面为光光子完成类型，这是地面TiO2。

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简介：CrystallineTiO2（P25）andisolatedtitanatespeciesinaZSM-5structure（TS-1）weremodifiedwithAuandAg,respectively,andtestedinthegas-phasephotocatalyticCO2reductionunderhighpurityconditions.Thenoblemetalmodificationwasperformedbyphotodeposition.LightabsorbancepropertiesofthecatalystsareexaminedwithUV–Visspectroscopybeforeandaftertheactivitytest.Inthegas-phasephotocatalyticCO2reduction,itwasobservedthatthecatalystswithAgnanostructuresaremoreactivethanthosewithAunanostructures.Itisthusfoundthattheenergeticdifferencebetweenthebandgapenergyofthesemiconductorandthepositionoftheplasmonisinfluencingthephotocatalyticactivity.Potentially,plasmonexcitationduetovisiblelightabsorptionresultsinplasmonresonanceenergy,whichaffectstheexcitationofthesemiconductorpositively.Therefore,anoverlapbetweenbandgapenergyofthesemiconductorandmetalplasmonisneeded.

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简介：Two-dimensional（2D）graphitecarbonnitride（g-C3N4）nanosheetshavebeensuccessfullyusedasasaturableabsorber（SA）inapassivelyQ-switchedNd:LLFlaserat1.3μmforthefirsttime,tothebestofourknowledge.Underanincidentpumppowerof9.97W,theshortestpulsedurationof275nswasacquiredwithoutputpowerof0.96Wandpulserepetitionrateof154kHz,resultinginapulseenergyof6.2μJ.Inaddition,thesaturableabsorptionbehaviorsofzero-dimensional12nmg-C3N4nanoparticles（g-C3N4-NPs）andthree-dimensionalorderedmesoporousg-C3N4（mpg-C3N4）werealsoobserved,althoughtheirmorphologyandstructurewerequitedifferentfrom2Dg-C3N4.Theexperimentalresultsintroducethepotentialapplicationofg-C3N4nanomaterialsasSAsinQ-switchedlasers.

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简介：小说荧光灯coumarin-4H-pyran结合被各种各样的合成-ketoesters的三部件的反应在水的媒介与醛和malononitrile完成。除温和反应条件以外，运作的简洁，乏味的分离过程的缺席，因为催化剂是这个方法的突出的优点，便宜、无毒的商业地可得到的cationic表面活化剂cetyltrimethylammonium氯化物(CTAC)使用。

简介：One-potachievementofethyllevulinatefromcassavawasconductedinethanol-watersystemoverseveralsimplesulfatesaltcatalysts.Al2（SO4）3catalysthadthebestperformanceinsynthesizingethyllevulinatecomparingwiththoseofaseriesofsulfatesalts.Thehighestyieldsofethyllevulinatewasupto39.27%aswellas7.78%levulinateacidwhencassavawascatalyzedinethanolmediumbyadding10wt%water.13Cand1HNMRspectroscopicinvestigationsconfirmedthatisomerizationofglucosetofructoseoverAl2（SO4）3catalystisanimportantstepinproducingethyllevulinateandlevulinateacid.DuetoaggregationsofAl3+underhydrothermalconditions,tinyamountofAl3+weredetectedinfiltrateatthepercentageof0.32%evenifinabsolutewater.BronstedandLewisacidscouldimprovetheyieldofethyllevulinateandlevulinateacidbysynergisticeffect.AllresultssuggestedthatA12（SO4）3wasasimpleandefficientcatalystforethyllevulinateandlevulinateacidproduction.

简介：Ablackphosphorus（BP）saturableabsorber（SA）solutionwithdifferentconcentrations（1.0and0.5mg/ml）isfabricatedwiththeliquid-phaseexfoliationmethod.ByusingtheBP-SA,acompactdiode-pumpedpassivelyQ-switchedNd：YV04laserisdemonstrated.OnereflectingBragggratingsisusedastheoutputcouplerformodeselection.ByinsertingthoseBP-SAsolutionsinthelasercavity,themaximumsinglelongitudemode,Q-switchedoutputpowersof126mWat692.5kHzand149mWat630.3kHzareachievedatthepumppowerof8.0W,correspondingtothepulsedurationsof144nsand196ns,respectively.Moreover,longitudinal-modecharacteristicsofQ-switchedoutputlaserindifferentopticalcavitylengthsbasedontwo-kindBP-SAsolutionconcentrationsareinvestigated.OurresultsshowthatBP-SAcouldalsobedevelopedasaneffectiveSAfortheQ-switched,singlelongitudinalmodepulselaser.