| 石墨烯-CdS的制备及在光电化学检测Cu~(2+)中的应用 |
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| 作者单位： | ;1.河南师范大学化学化工学院;2.河南师范大学环境学院 |
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| 摘 要： | 通过一步溶剂热法制备了石墨烯-CdS复合材料(GR-CdS),并通过XRD、TEM、HRTEM等测试手段对其进行表征.结果表明CdS纳米颗粒的生成和氧化石墨烯的还原同时发生,CdS纳米颗粒分布在石墨烯的表面.实验中还探讨了氧化石墨烯的用量对复合材料光电性能的影响.实验结果证明氧化石墨烯的用量为10mg时,复合材料具有较好的光电活性(GR10-CdS).因此GR10-CdS修饰到导电玻璃表面作为光电化学传感器检测Cu2+,线性检测范围为10~80μmol/L,信噪比为3时传感器的检测限是9.5nmol/L,而且该光电化学传感器表现出很好的选择性.
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| 关 键 词： | 石墨烯-CdS 复合材料 光电化学传感 Cu2+ |
Synthesis of Graphene-CdS Nanocomposites and the Application in Selective Determination of Cu~(2+) |
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| Institution: | ,School of Chemistry and Chemical Engineering Henan Normal University,School of Environmental Henan Normal University |
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| Abstract: | Graphene-CdS nanocomposites were successfully prepared via one-step solvothermal method.TEM results proved that CdS were homogeneously dispersed on graphene sheets,which favorited the charge transport and separation.The controlled expriments proved that graphene-CdS nanocomposite/ITO electrode with 10 mg graphene oxide dosage exhibited the highest photocurrent.Therefore,aphotoelectrochemical sensor was developed to detected Cu2+using graphene-CdS/ITO electrode.The sensor exhibited good selectivity and linear relationship from 10μmol/L to 80μmol/L with detection limit of 9.5nmol/L at a signal-to-noise(S/N)ratio of 3. |
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| Keywords: | Graphene-CdS composite photoelectrochemical sensor Cu2+ |
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