纺锤形介孔纳米二氧化锰的控制合成.pdf

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1、物理化学学~E(WuliHuaxueXuebao)MarchActaP．一Chim．Sin．2011，27(3)，743-748743[Article]www．whxb．pku．edu．cn纺锤形介孑L纳米二氧化锰的控制合成韩玲倪纪朋张良苗岳宝华申杉杉张浩陆文聪(上海大学化学系，上海200444)摘要：在KMnO和葡萄糖水溶液体系中，用一步水热法控制合成了介孔MnCO。纳米纺锤体，通过焙烧MnCO。前驱体可以得到介孔纳米Mn0，且保持了原有的纺锤体形貌．用X射线衍射(XRD)、傅里叶变换红外(FTIR)

2、光谱、扫描电镜(SEM)、透射电镜(TEM)和N：吸附-脱附(BET)对制备的样品进行了形貌和结构的表征．并对反应时间、反应物浓度等对产物形貌的影响进行了研究．实验结果表明，反应时间和葡萄糖的浓度对MnCO。前驱体的尺寸和形貌具有重要影响，MnCO。纵横比可从1．35：1到2．89：1之间改变．并初步探讨了介孔MnO纺锤体的生K机制，MnO孔的形成是由于焙烧葡萄糖降解形成的纳米碳颗粒所致．关键词：水热法：纺锤形：MnO：：介孔中图分类号：O641ControlledSynthesisofMesoporo

3、usMnO2NanospindlesHANLingNIJi—PengZHANGLiang—MiaoYUEBao—HuaSHENShan—ShanZHANGHaoLUWen—Cong(DepartmentofChemistry,ShanghaiUniversity,Shanghai200444，PRChina)Abstract：WesynthesizedmesoporousMnO2nanospindlesbyaone-stephydrothermaIprocessinanaqueoussolutionof

4、KMnO4andglucose．Thestructure，morphology，purity，andsizeoftheproductswerecharacterizedbyX-raydifraction(XRD)，Fouriertransforminfrared(FTIR)spectroscopy，transmissionelectronmicroscopy(TEM)，highresolutiontransmissionelectronmicroscopy(HRTEM)，scanningelectron

5、microscopy(SEM)，andnitrogenadsorplion，desorption(BET)measurements．ThereactiontimeandconcentrationsofglucoseinfluencedthefinaIstructuresandshapesoftheMnO2nanospindles．ThelengthtodiameterratiooftheMnCO3precursornanospindlescanbeeasilytunedfr0m1．35：1t02．89：

6、1．ApossibleformationmechanismforthemesoporousMnO2nanospindlesisproposedanddiscussed．KeyWords：Hydrothermalmethod；Spindle；MnO2：Mesoporous1lntroductionandV2O5，etc．～Thus，mesoporousproductswithcontrolledRecently,mucheforthasbeendevotedtothesynthesisofstructur

7、esandshapesremainanewchallengebecauseoftheirmesoporousmaterials，becauseoftheirwonderfulstructurespossiblepotentialfunctionscausedbythecombinationoftheandwidepotentialapplicationsintheareasofcatalysis，sorp—specific—shapeandthemesoporousstructures．tion，che

8、micalandbiologicalseparation，photonicandelectron—Manganeseoxides(MnO2)havebeenextensivelystudiedasicdevices，anddrugdelivery．一Sincethemesoporoussilicaawell—knowntransition—metaloxide．becauseoftheirnove1wasreported，manyresea