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时间:2020-03-27
《粒度可调纳米CuO的制备及其表面硫化研究.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29卷第6期无机化学学报Vol-29No.62013年6月CHINESEJOURNALOFINORGANICCHEMISTRY1185—1l9l粒度可调纳米Cuo的制备及其表面硫化研究顾少楠孙和云范迎菊孙中溪(济南大学化学化工学院,济南250022)摘要:用Cu(NO3)·3H,0为原料,25%氨水为配位剂.用NaOH做沉淀剂,在不同醇一氨水体系中用配位沉淀法制备粒径可调的纳米Cu0。通过热重差热分析法fTG—DTA)分析前驱体的组成并得到煅烧最佳温度。在制备前驱体过程中,探究了反应体系溶剂分别为乙醇、正丁醇、正辛醇时对产物粒径的影响,实验结果
2、表明:随着醇溶剂中碳链的增长.得到纳米CuO的比表面积依次增大.粒度依次减小。将纳米CuO与硫单质混合.在通入氮气的管式炉中以200℃加热90min.可以得到表面硫化的CuO(CuO/CuS),利用x一射线粉末衍射fxRD)和红外吸收光谱(Fr.IR)对纳米Cu0和CuO/CuS进行表征最后将纳米CuO和CuO/CuS分别对乙基黄原酸钾进行吸附.结果表明CuO/CuS对乙基黄原酸钾吸附能力明显增强.进而证明氧化铜表面发生了硫化关键词:配位沉淀;纳米CuO;表面硫化;吸附;黄原酸盐中图分类号:0614.121文献标识码:A文章编号:1001—486
3、1(2013)06—1185—07DOI:10.39696.issn.1001—4861.2013.O0.181SynthesisofSizeTunableNanoCopperOxideandItsSurfaceSulphidizationGUShao—NanSUNHe-YunFANYing—JuSUNZhong—Xi(SchoolofChemistryandChemicalEngineering,UniversityofJ/nan,J/nan250022,China)Abstract:UsingCu(NO3)2‘3H20asrawmateria
4、ls,25%ammoniaascomplexingagentandNaOHasprecipitant,thesizetunablenanoCuOwassynthesizedinvariablealcoho1.watersystems.ThecomponentandtheoptimizedcalcinationtemperatureoftheprecursorweredeterminedthroughTG.DTAanalysis.Thesolventusedinammonia.watersystemwasethano1.butano1andoeta
5、nolrespectivelyandtheireffectontheproductparticlesizewasdiscussed.TheresultsshowedthatthespecificsurfaceareasofCuOnanoparticlesincreasedandtheirsizesdecreasedwithincreasingthecarbonchainlengthofalcoholused.ThesurfacesulphidizationofCuO(CuO/CnS)wasobtainedbyheattreatmentofCuOa
6、ndelementalsulfurmixtureinatubetypefurnaceundernitrogenatmosphereat200oCfor90minutes.PowderX—raydiffractionandinfraredabsorptionspectroscopyanalysismethodswereusedtocharacterizethephysicalandchemicalpropertiesofnanoCu0andCuO/CuS.Theadsorptionofpotassiumethylxanthateatthesurfa
7、cesofnanoCuOandCuO/CuSwasstudied.TheresultrevealedthatthecapabilityofCuO/CuSadsorbingpotassiumethylxanthatewasmarkedlyenhanced,furtherprovingthesurfaeesulphidizationoccurredonthesurfaceofnanoCu0.Keywords:complexprecipitation;nanocopperoxide;surfacesulphidization;adsorption;xa
8、nthate不同形貌的氧化铜和表面改性氧化铜纳米粒子是近些年的研究热点_l9—301。采用传统的直接沉淀法制在气敏传感『1.81、催化[
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