• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials science & engineering >A cobalt oxide nanocubes interleaved reduced graphene oxide nanocomposite modified glassy carbon electrode for amperometric detection of serotonin
【24h】

A cobalt oxide nanocubes interleaved reduced graphene oxide nanocomposite modified glassy carbon electrode for amperometric detection of serotonin

机译：氧化钴纳米立方体交错还原氧化石墨烯纳米复合改性玻璃碳电极的安培检测5-羟色胺

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Cobalt oxide nanocubes incorporated with reduced graphene oxide (rGO-Co3O4) was prepared by using simple one-step hydrothermal route. Crystallinity and structural characteristics of the nanocomposite were analyzed and confirmed using X-ray diffraction (XRD) and Raman analysis, respectively. The cubical shape of the Co3O4 nanostructures and the distribution of Co3O4 nanocubes on the surface of rGO sheets were identified through field emission scanning electron microscopy (FESEM) and energy dispersive X-ray (EDX) mapping analysis, respectively. Raman spectra depicted the presence of D and G bands for GO and rGO with different I-D/I-G values and thus confirmed the reduction of GO into rGO. The electrochemical study reflects that the rGO-Co3O4 nanocomposite shows good electrocatalytic activity in oxidation of depression biomarker serotonin (5-HT) in phosphate buffer (pH 7.2). The detection of 5-HT was carried out by using rGO-Co3O4 nanocomposite modified glassy carbon electrode under dynamic condition using amperometry technique with a linear range of 1-10 mu M. The limit of detection and limit of quantification were calculated and found to be 1.128 and 3.760 mu M, respectively with a sensitivity value of 0.133 mu A.mu M-1. The sensor showed selectivity in the presence of different interferent species such as ascorbic acid, dopamine and uric acid.
机译：通过简单的一步水热法制备了掺有还原氧化石墨烯（rGO-Co3O4）的氧化钴纳米立方体。分别使用X射线衍射（XRD）和拉曼分析对纳米复合材料的结晶度和结构特征进行了分析和确认。通过场发射扫描电子显微镜（FESEM）和能量色散X射线（EDX）作图分析分别确定了rGO片材表面的Co3O4纳米结构的立方形状和Co3O4纳米立方体的分布。拉曼光谱描述了具有不同I-D / I-G值的GO和rGO的D和G带的存在，因此证实了GO还原为rGO。电化学研究表明，rGO-Co3O4纳米复合材料在磷酸盐缓冲液（pH 7.2）中对抑郁生物标志物血清素（5-HT）的氧化中显示出良好的电催化活性。 5-HT的检测是通过使用rGO-Co3O4纳米复合修饰玻碳电极在动态条件下使用安培法进行的，线性范围为1-10μM。计算出检测极限和定量极限，得出分别为1.128和3.760μM，灵敏度值为0.133μA.μM-1。该传感器在存在不同干扰物（例如抗坏血酸，多巴胺和尿酸）的情况下显示出选择性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号