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首页> 外文期刊>RSC Advances >An electrochemical sensor based on reduced graphene oxide and copper sulfide hollow nanospheres
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An electrochemical sensor based on reduced graphene oxide and copper sulfide hollow nanospheres

机译：基于还原氧化石墨烯和硫化铜空心纳米球的电化学传感器

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摘要

A nonenzymatic sensor for the detection of hydrogen peroxide (H2O2) was fabricated with reduced graphene oxide (RGO) and copper sulfide hollow nanospheres (CuSHNs). The RGO was obtained by an electrochemical reduction method; and the CuSHNs were acquired using Cu2O nanoparticles as sacrificial templates. The prepared CuSHNs showed a rough hollow ball structure surrounded with a porous shell which supplies many exposed electrocatalytic active sites for the target analyte. The RGO and CuSHNs have good synergistic effects, which can significantly enhance the amperometric response of the sensor toward H2O2. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and electrochemical measurements were used to characterize the RGO and the CuSHNs. The reduction time of graphene oxide, the pH of PBS and the applied potential were optimized. Under the optimized experimental conditions, a linear range of 0.005 to 4 mM was obtained with a detection limit of 3 mM (S/N = 3). The linear equation is y = 7.1245x + 0.3659 (R = 0.9989). The reproducibility was investigated with an RSD of 2.46% (n = 3). The developed H2O2 sensor based on the RGO and CuSHNs possesses advantages such as simple fabrication, fast response, good selectivity, wide linear range and low detection limit.
机译：用还原的氧化石墨烯（RGO）和硫化铜空心纳米球（CuSHNs）制成了用于检测过氧化氢（H2O2）的非酶传感器。 RGO是通过电化学还原法获得的。并以Cu2O纳米颗粒为牺牲模板获得了CuSHNs。制备的CuSHNs显示出一个粗糙的空心球结构，周围是多孔壳，该多孔壳为目标分析物提供了许多暴露的电催化活性位。 RGO和CuSHN具有良好的协同作用，可以显着增强传感器对H2O2的安培响应。扫描电子显微镜（SEM），透射电子显微镜（TEM）和电化学测量用于表征RGO和CuSHNs。优化了氧化石墨烯的还原时间，PBS的pH和施加的电势。在优化的实验条件下，线性范围为0.005至4 mM，检测极限为3 mM（S / N = 3）。线性方程为y = 7.1245x + 0.3659（R = 0.9989）。用2.46％（n = 3）的RSD研究了可重复性。基于RGO和CuSHNs开发的H2O2传感器具有制造简单，响应速度快，选择性好，线性范围宽，检测限低等优点。

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