RGO-YO 和 RGO-YO:Cr 纳米复合材料传感器对多巴胺的影响。

Effect of RGO-YO and RGO-YO:Cr nanocomposite sensor for dopamine.

机构信息

Department of P.G. Studies and Research in Industrial Chemistry, Kuvempu University, Jnana Sahyadri, Shankaraghatta, Shimoga, Karnataka, 577451, India.

Department of Studies and Research in Physics, Tumkur University, Tumkur, Karnataka, 572 103, India.

出版信息

Sci Rep. 2021 Apr 30;11(1):9372. doi: 10.1038/s41598-021-87749-z.

The RGO-YO and RGO-YO: Cr (5 mol %) nanocomposite (NC) synthesized by hydrothermal technique. The structure and morphology of the synthesized NCs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). YO:Cr displays spherical-shaped particles. Conversely, the surface of the RGO displays a wrinkly texture connecting with the existence of flexible and ultrathin graphene sheets. The photoluminescence (PL) emission spectra showed series of sharp peaks at 490, 591, and 687 nm which corresponding to F → H, F → H and F → H transitions and lies in the blue, orange, and red region. The prepared NCs were used for the preparation of modified carbon paste electrodes (MCPE) in the electrochemical detection of dopamine (DA) at pH 7.4. Both modified electrodes provide a good current response towards voltammetric detection of DA. Doping is an effective method to improve the conductivity of YO:Cr and developed a method for the sensor used in analytical applications.

采用水热技术合成了 RGO-YO 和 RGO-YO:Cr（5 mol %）纳米复合材料（NC）。通过 X 射线衍射（XRD）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对合成的 NCs 的结构和形态进行了表征。YO:Cr 呈现出球形颗粒。相比之下，RGO 的表面呈现出褶皱状纹理，与柔性和超薄石墨烯片的存在相连接。光致发光（PL）发射光谱在 490、591 和 687nm 处显示出一系列尖锐的峰，分别对应于 F→H、F→H 和 F→H 跃迁，并位于蓝色、橙色和红色区域。将制备的 NCs 用于在 pH 7.4 下电化学检测多巴胺（DA）的修饰碳糊电极（MCPE）的制备。两种修饰电极对 DA 的伏安检测都提供了良好的电流响应。掺杂是提高 YO:Cr 电导率的有效方法，并为用于分析应用的传感器开发了一种方法。