简介：1）碳、硅同为第ⅣA族元素且在周期表中位置相邻,为什么CO_2为气态,而SiO_2则为坚硬的固态？碳元素与硅元素的原子结构相似,故其单质及化合物在物理、化学性质方面有很多相似之处.比如,其单质均可形成微观四面体结构（金刚石与晶体硅）;其简单氢化物分子均为正四面体型结构;最高价氧化物的水化物均为弱酸等.

简介：摘要将程序升温方式和阀切时间的优化相互结合到一起，采用此种方式，把微量CO、CO_2从液态烃中分离出来，这样既能够缩短分析时间，还减少了乙烯/丙烯进入TDX-1型色谱柱中。在具体分析过程中，新优化的方法和出厂设置的恒温控制、恒定阀切时间分析样品相比较而言，并没有出现较大程度的基线漂移过低以及色谱柱分析效果降低的情况，从一定程度上提升了分析效率，并且可以延长色谱的使用寿命，对仪器维护有着十分重要的作用。

简介：CO2capturewithionicliquids（ILs）hasattractedmanyattentions,andmostworksfocusedonabsorptionabilityatambienttemperatures,whileseldomresearchwasconcernedatelevatedtemperatures.ThisnotonlylimitstheCO2absorptionapplicationatelevatedtemperature,butalsothedeterminationoftheoperationconditionoftheCO2desorptiongenerallyoccurringathighertemperature.ThisworkmainlyreportedCO2solubilitiesinILsatelevatedtemperaturesandrelatedpropertieswerealsoprovided.1-alkyl-3-methylimidazoliumbis（trifluoromethylsulfonyl）imide（[CnMIm][Tf2N]）ILswereselectedasphysicalabsorbentsforCO2captureinthisworkduetotheirrelativehigherCO2absorptioncapacitiesandgoodthermalstabilities.Thelong-termstabilitytestsshowedthat[CnMIm][Tf2N]isthermallystableat393.15Kforlongtime.CO2solubilitiesin[CnMIm][Tf2N]weresystematicallydeterminedattemperaturesfrom353.15Kto393.15K.ItdemonstratedthatCO2solubilityobviouslyincreaseswiththeincreaseofpressurewhileslightlydecreaseswithincreaseoftemperature.Asthelengthofalkylchainonthecationincreases,CO2solubilityinILsincreases.Additionally,thethermodynamicpropertiesincludingtheGibbsfreeenergy,enthalpy,andentropyofCO2werealsocalculated.

简介：Co-electrolysisofCO2andH2Ousinghigh-temperaturesolidoxideelectrolysiscells（SOECs）intovaluablechemicalshasattractedgreatattentionsrecentlyduetothehighconversionandenergyefficiency,whichprovidesopportunitiesofreducingCO2emission,mitigatingglobalwarmingandstoringintermittentrenewableenergies.AsingleSOECtypicallyconsistsofanionconductingelectrolyte,ananodeandacathodewheretheco-electrolysisreactiontakesplace.Thehighoperatingtemperatureanddifficultactivatedcarbon-oxygendouble-bondofCO2putforwardstrictrequirementsforSOECcathode.Greateffortsarebeingdevotedtodevelopsuitablecathodematerialswithhighcatalyticactivityandexcellentlong-termstabilityforCO2/H2Oelectro-reduction.Thesofarcathodematerialdevelopmentisthekeypointofthisreviewandalternativestrategiesofhigh-performancecathodematerialpreparationisproposed.UnderstandingthemechanismofCO2/H2Oelectro-reductionisbeneficialtohighlyactivecathodedesignandoptimization.Thusthepossiblereactionmechanismisalsodiscussed.Especially,amethodincombinationwithelectrochemicalimpedancespectroscopy（EIS）measurement,distributionfunctionsofrelaxationtimes（DRT）calculation,complexnonlinearleastsquare（CNLS）fittingandoperandoambientpressureX-rayphotoelectronspectroscopy（APXPS）characterizationisintroducedtocorrectlydisclosethereactionmechanismofCO2/H2Oco-electrolysis.Finally,differentreactionmodesoftheCO2/H2OcoelectrolysisinSOECsaresummarizedtooffernewstrategiestoenhancetheCO2conversion.Otherwise,developingSOECsoperatingat300-600°CcanintegratetheelectrochemicalreductionandtheFischer-TropschreactiontoconverttheCO2/H2Ointomorevaluablechemicals,whichwillbeanewresearchdirectioninthefuture.

简介：ReducingtheanthropogenicCO2emissionsfromfossilresourcecombustionandhumanactivitieshasbecomeoneofthemajorchallengeswearefacingtoday.BeyondthosepracticalapplicationsfortheutilizationofCO2,suchasthesynthesisofsalicylicacid,methanol,urea,NaHCO3-Na2CO3chemicalsandrecentlydevelopedpolycarbonatesynthesis,scientistsarestillseekingnewmaterialsandtechnologiesforefficientcapture,

简介：TheeffortonelectrochemicalreductionofCO2tousefulchemicalsusingtherenewableenergytodrivetheprocessisgrowingfastrecently.Inthisreview,weintroducetherecentprogressesontheelectrochemicalreductionofCO2insolidoxideelectrolysiscells（SOECs）.Athightemperature,onlyCOisproducedwithhighcurrentdensitiesandFaradicefficiencywhilethereactoriscomplicatedandabettersealingtechniqueisurgentlyneeded.Thetypicalelectrolytessuchaszirconia-basedoxides,ceria-basedoxidesandlanthanumgallates-basedoxides,anodesandcathodesareintroducedinthisreview,andthecathodematerials,suchasconventionalmetal–ceramics（cermets）,mixedionicandelectronicconductors（MIECs）arediscussedindetail.Inthefuture,togainmorevalue-addedproducts,theelectrolyte,cathodeandanodematerialsshouldbedevelopedtoallowSOECstobeoperatedattemperaturerangeof573–873K.Atthosetemperatures,SOECsmaycombinetheadvantagesofthelowtemperaturesystemandthehightemperaturesystemtoproducevariousproductswithhighcurrentdensities.

简介：Wesynthesizedonequaternaryammoniumpolymericionicliquids（PILs）P[VBTHEA]ClandthreeimidazoliumPILsofP[VEIm]Br,P[VEIm]BF4,P[VEIm]PF6byfree-radicalpolymerizationinsolution.ThesePILswerecharacterizedbyFT-IR,1H-NMR,13C-NMR,TGA,XRDandSEM.TheirCO2adsorptioncapacitiesweremeasuredunderdifferentpressuresandtemperaturesbyconstant-volumetechnique.ItwasobservedthatquaternaryammoniumPILsofP[VBTHEA]ClhavehigheradsorptioncapacityforCO2thanthoseimidazoliumPILs,followingP[VBTHEA]Cl>P[VEIm]PF6>P[VEIm]BF4>P[VEIm]Br,whichmaybeascribedtohigherpositivechargedensityonammoniumcationthanthatonimidazoliumcationandthusstrongerinteractionwithCO2,consistentwiththeresultsfromdual-modeadsorptionmodelthatammoniumPILshavemuchhigherCO2bulkabsorptionthanimidazoliumPILs.CO2adsorptioncapacityofP[VBTHEA]Clis9.02mg/gunder295Kand1bar,whichiscomparabletothatofsomeotherPILs,andismuchhigherthanthatofthecorrespondingILsmonomer.ThesePILshavegoodadsorptionselectivityforCO2overN2andregenerationefficiency.

简介：Amine-silicacompositematerialsforpost-combustionCO2capturehaveattractedconsiderableattentionbecauseoftheirhighCO2uptakeatlowCO2concentrations,excellentCO2captureselectivityinthepresenceofmoisture,andlowerenergyrequirementsforsorbentregeneration.Thisreviewdiscussestherecentadvancesinamine-silicacompositesforCO2capture,includingadsorbentpreparationandcharacterization,CO2captureunderdryandmoistureconditionsatdifferentCO2partialpressures,sorbentregeneration,andstabilityaftermanycyclicsorption-desorptionruns.

简介：

简介：Embodiedcarbonintradehasattractedtheattentionofresearchers,developers,andindustryleadersworldwide,asithasbecomeaconsiderablesourceoftradeconflict.BecauseChinaistheworld’sleadingcarbon-emittingcountry,itisimportanttostudythechangetrendsofembodiedCO2inChinesetradetoidentifykeyinfluencingfactors.ThispaperinvestigatesthetradeembodiedCO2inChina,withspecialfocusontheproductionprocessandmaterialsofeachindustrialsectorfrom1990to2013.Thisstudywasconductedbyusinganinput-outputmodel,whichanalyzesthespecificcausesofperiodicwaves.Ourfindingssuggestthatthemachinemanufacturingsectorproducedthelargestshareofemissions,whereasthemetalandnon-metalsectorhasthehighestemissionintensity.Moreover,thetotalemissionquantitiesintradeincreasedfrom612to3331milliontonsin1990to2013,aperiodcharacterizedbydecentralizedtrendsinemissionsexportedtotradepartners.Wealsoemployedthelog-meanDivisiaindex（LMDI）modeltodecomposethecarbonemissionschangesintoexportstructure,exportscale,energystructure,andenergyintensity,andestimatetheinfluenceofthesefactorsatanumberoftimepoints.Wefoundthatenergyintensitycurbsemissionsincrease,andthatexportscaleexpansionisthestrongestdrivingforce.

简介：在不同植物社区(落叶松，桦树，丁香花，和草地)的公司2集中在黑隆贾恩格·福雷斯特在成长季节期间被测量学习的植物的花园日报在不同空格影响公司2集中的变化，季节、年度的动力学和因素。在在绿陆地的不同社区的公司2集中有一明显日报变化，长期地减少，并且温度影响了丁香花区域和草地。季节地，公司2在落叶松绿色陆地是最低的(344.03吗？

简介：TogaindeepinsightintotheMorphologicaleffectofNixMg1-xOcatalystsonthereactionofCO2reformingwithmethane,wedesignedandfabricatedthreedifferentspatialstructuralNixMg1-xOcatalysts.TheseNixMg1-xOcatalystswithspecificmodelssuchasrod,sheetandsphere,exhibitedvariousactivityandstabilityinCO2reformingreaction.HereinNixMg1-xOnanorodsdisplayedhighercatalyticactivity,inwhichmethaneconversionwasupto72%andCO2conversionwas64%at670°Cwithaspacevelocityof79,200mL/（gcath）,comparedwithnanosheetandnanospherecounterparts.Furthermore,bothcatalystsofNixMg1-xOnanorodandnanosheetshowedahighresistancetowardcokedepositionandsinteringofactivesitesintheprocessofCO2reformingofmethane.

简介：摘要目的试评价CO2激光对皱纹和光损伤疗效。方法2014年9月～2016年7月，医院皮肤美容科门诊共收治采用CO2激光治疗皱纹以及光损伤患者184例，随访1个月，评价疗效。结果治疗后面部皮肤皱纹，松弛，皮肤修复性增厚，色素沉着积分与CMSS评分低于治疗前，差异有统计学意义（P＜0.05）。治疗后，CMSS评分阳性率、轻度率、中度率低于治疗前，差异有统计学意义（P＜0.05）。结论CO2激光治疗皱纹和光损伤疗效肯定，能够有效减轻面部皮肤皱纹，松弛，皮肤修复性增厚，色素沉着问题，减轻患者体像障碍。

简介：

简介：摘要目的探讨CO2激光联合光动力治疗尖锐湿疣临床效果。方法研究我院2015年5月—2017年3月期间随机抽取的80例尖锐湿疣患者，分为对照组与观察组各40例，其中对照组运用CO2激光治疗，观察组运用CO2激光联合光动力治疗，分析两组患者治疗效果差异。结果在治愈率上，观察组为75%，对照组为37.5%，组间差异显著，P＜0.05；在复发率上，观察组为25%，对照组为62.5%，组间差异显著，P＜0.05；在不良反应率上，两组没有显著性差异，P＞0.05。结论CO2激光联合光动力治疗尖锐湿疣可以有效的保证治愈率，减少复发率，同时不会提升不良反应，治疗安全与效果均有保证。

简介：为研究城市区域近地面CO2浓度变化特征,于2016年1月-12月对济南城市大气中CO2浓度进行了连续观测.结果表明,CO2具有明显的日变化规律,其中春、夏、秋季存在一峰一谷的现象,而冬季只有一峰.CO2浓度随季节变化明显,浓度最高值出现在冬季1月份,最低值出现在夏季6月份.CO2与SO2相关性较高,说明二者都来源于燃煤贡献.CO2浓度与风速和气温呈负相关关系,而与相对湿度呈正相关关系.

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.

简介：Inthiswork,a2Dcovalenttriazine-basedframeworkwaspreparedbyusing1,3-dicyanobenzo[c]thiophene（DCBT）asmonomertoeffectivelycaptureCO2.TheresultingCTF-DCBTwascharacterizedbyFT-IR,XPS,PXRD,elementalanalysis,SEM,TEM,andN2adsorption-desorption.TheresultsindicatethatCTF-DCBTispartiallycrystallineandhasultramicropore（6.5A?）aswellashighheteroatomcontents（11.24wt%and12.61wt%forNandS,respectively）.Inaddition,theBETsurfaceareaandtotalporevolumeofCTF-DCBTare500m2/gand0.26cm3/g,respectively.CTF-DCBTpossessesexcellentthermalstability（450°C）andchemicalstabilitytowardsboilingwater,4MHCl,and1MNaOH.TheCO2adsorptioncapacityofCTF-DCBTis37.8cm3/gat1barand25°C.Aftersixadsorption-desorptioncycles,thereisnoobviouslossofCO2uptakeobserved.Duetotheultramicroporeandhighheteroatomcontents,CTF-DCBThashighisostericheatsofadsorptionforCO2andhighselectivitiesofCO2overN2andCH4.At25°C,theCO2/N2andCO2/CH4selectivitiesare112.5and10.3,respectively,whicharehigherthanthoseofmostPOFs.BreakthroughcurvesindicatethatCTF-DCBTcouldeffectivelyseparateCO2/N2andCO2/CH4mixtures.

简介：CO2conversionviaphotocatalysisisapotentialsolutiontoaddressglobalwarmingandenergyshortage.PhotocatalysiscandirectlyutilizetheinexhaustiblesunlightasanenergysourcetocatalyzethereductionofCO2tousefulsolarfuelssuchasCO,CH4,CH3OH,andC2H5OH.Amongstudiedformulations,CubasedphotocatalystsarethemostattractiveforCO2conversionbecausetheCu-basedphotocatalystsarelow-costandabundancecomparingnoblemetal-basedcatalysts.Inthisliteraturereview,acomprehensivesummaryofrecentprogressonCu-basedphotocatalystsforCO2conversion,whichincludesmetalliccopper,copperalloynanoparticles（NPs）,copperoxides,andcoppersulfidesphotocatalysts,canbefound.Thisreviewalsoincludedadetaileddiscussiononthecorrelationsofmorphology,structure,andperformanceforeachtypeofCu-basedcatalysts.Thereactionmechanismsandpossiblepathwaysforproductionsofvarioussolarfuelswereanalyzed,whichprovideinsightintothenatureofpotentialactivesitesforthecatalysts.Finally,thecurrentchallengesandperspectivefutureresearchdirectionswereoutlined,holdingpromisetoadvanceCu-basedphotocatalystsforCO2conversionwithmuch-enhancedenergyconversionefficiencyandproductionrates.

简介：摘要用高效液相色谱法测定水中苯胺，采用自动固相萃取和液液萃取两种不同的前处理方法，比较两种前处理方法在实际应用中的优缺点。自动固相萃取选择用HLB小柱采用5%甲醇水溶液活化小柱，上样然后使用甲醇完全洗脱。液液萃取用1mol/L的氢氧化钠将水样的pH值调至11-12，加入5g氯化钠，将水样转入250mL分液漏斗中，用10mL二氯甲烷分两次萃取。HPLC采用V（0.05mol/L乙酸-乙酸铵缓冲溶液）V（甲醇）=6535混合溶液为流动相等度洗脱。该法的检测限为0.3ug/L。