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时间:2020-03-27
《碳催化剂的合成及其在多巴胺电化学检测中的应用.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第25卷第4期化学研究中国科技核心期刊2014年7月CHEMICALRESEARCHhttp://hxya.chinajourna1.net.cnSynthesisofgoldnan0particles/carb0ncatalystanditsapplicatoninelectrochemicaldetectionofdopamineYANGJinghe’“,YANGDuo。,LIYamin(1.CollegeofChemistryandChemicalEngineering,HenanUniversity,Kaifeng475004,Henan,China;2.Col
2、legeofChemistryandMolecularEngineering,PekingUniversity,Beijing100871,China;3.XinlianCollege(FacultyofScience),HenanNormalUniversity,Xinxiang453007,Henan,China)Abstract:Anewmethodhasbeendevelopedforthesynthesisofcarbon—supportedgoldnanop—articles(denotedasAuC).Thusyeast,glucoseandHAuC14s
3、olutionweremixedwithashakerunder310Kforseveraldaystoaffordprecursorsaltofgoldadsorbedbyyeast(codedasAuY).ResultantAuYwascalcinatedinN2at1273Kaffordingtitlecatalyst.Themorphologyoftheproductwasobservedwithascanningelectronmicroscopeandatransmissionelectronmicro—scope.Furthermore,as—prepar
4、edAuCwasintroducedontothesurfaceofglassycarbonelec-trodegeneratingAuC——modifiedglassycarbonelectrodefortheelectrochemicaldetectionofdo-—pamine.Itwasfoundthat,afterAuYprecursorwasculturedfor3d,thesizeoftheyeastisnotuniformbecauseoftheabsorptionandpackageofplentyofglucoseandtheexistenceofm
5、anyyeastspores.ThesizeofgoldnanoparticlesinAuYculturedfor6disabout10nm,andtheyareuniformlydispersedonthecarbonsubstrate.Inthemeantime,AuC—modifiedglassye—lectrodeshowsexcellentresponsetotheelectro—oxidationofdopamineandhasalowdetectionlimit,whileitselectrochemicalprocessisdominatedbyahyb
6、ridkineticmechanism.Keywords:nanoscalegold/carboncatalyst;yeastadsorption;carburizationroute;synthesis;dopamine;electrochemicaldetection;applicationCICnumber10627.12Documentcode:AArticleID:1008—1O11(2014)04~0331一O5纳米金/碳催化剂的合成及其在多巴胺电化学检测中的应用杨敬贺,杨朵。,李亚敏(1.河南大学化学化工学院,河南开封475004;2.北京大学化学与分子工
7、程学院,北京1008713.河南师范大学新联学院(理学院),河南新乡453007)摘要:建立了一种合成碳负载型金纳米颗粒(AuC)的新方法.将酵母菌、葡萄糖及HAuC1溶液混合后置于恒温摇床中,在310K下振荡数天得到酵母菌吸附的金前体盐(AuY);将AuY在氮气气氛中1273K下煅烧得到AuC.采用扫描电镜和透射电镜观察了AuC的形貌;将AuC修饰在玻碳电极上并用于多巴胺的电化学检测.结果表明,AuY培养3d后,其酵母菌颗粒粒径分布不均匀,这主要是由于大量葡萄糖的吸附和包裹以及酵母孢子的存在所致;而AuY培养6d后得到的金颗粒粒径分布均
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