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金纳米粒子修饰的三维花状二硫化钼复合材料的制备及其用于检测过氧化氢的研究
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作者单位
吴晓惠,尚志航,隋丽丽,孙莹莹 沈阳医学院化学教研室 
基金项目:辽宁省自然科学基金项目(201602727)
中文摘要:以Na2MoO4?2H2O为钼源,硫脲为硫源和还原剂,氧化多壁碳纳米管(o-MWNTs)和氧化石墨烯(GO)为原料,采用水热法合成了三维花状MoS2/GO/o-MWNTs纳米复合材料,并进一步采用原位还原法将金纳米粒子修饰至MoS2/GO/o-MWNTs纳米复合材料表面。通过场发射扫描电镜、透射电镜、XRD、XPS等对上述复合材料进行表征。结果表明,该复合纳米材料具有3D花状球结构,且Au纳米粒子已成功生长在其花瓣状片层上。采用滴涂法制得该复合材料修饰的玻碳电极,研究了过氧化氢在该电极上的电化学行为。结果表明:该电极对过氧化氢的电还原表现出强催化活性。通过对不同浓度过氧化氢的催化还原,得出该电极对过氧化氢的线性范围为12.0×10-9~31.0×10-6 mol/L,灵敏度为56.6 μA/(mmol?L-1),检出限为12.0×10-9 mol/L。
中文关键词:金纳米粒子  二硫化钼  多壁碳纳米管  氧化石墨烯  过氧化氢
 
Preparation of Flower-like 3D MoS2/GO/o-MWNTs Composites Modified by Gold Nanoparticles and Their Application in Detection of Hydrogen Peroxide
Abstract:In this paper,the flowerlike MoS2/GO/o-MWNTs composites were synthesized by using Na2MoO4?2H2O as molybdenum source,thiourea as sulfur source and reducing agent,and mixed oxidized multi-walled carbon nanotubes(o-MWNTs) and graphene oxide(GO) as raw material,respectively.Then,the gold nanoparticles were deposited on the surface of MoS2/GO/o-MWNTs by in situ chemical reduction method.The characterization of this nanocomposites was performed by field emission scanning electron microscopy(FESEM),transmission electron microscopy(TEM),X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS).Results demonstrated that the MoS2/GO/o-MWNTs composites were synthesized successfully via the hydrothermal method,and gold nanoparticles were modified on the flower sheets.The nanocomposites were modified on the glassy carbon electrode(GCE) to investigate the electrochemical behavior for H2O2.The results showed that the electrode exhibited a strong catalytic activity toward H2O2,and there was a linear relationship between the electrode and H2O2 in the concentration range of 12.0×10-9-31.0×10-6 mol/L with a sensitivity of 56.6 μA/(mmol?L-1) and a detection limit of 12.0×10-9 mol/L.
Key Words:gold nanoparticles  MoS2  multi-walled carbon nanotubes  graphene oxide  H2O2
引用本文:吴晓惠,尚志航,隋丽丽,孙莹莹.金纳米粒子修饰的三维花状二硫化钼复合材料的制备及其用于检测过氧化氢的研究[J].分析测试学报,2019,(6):675-680.
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