Electrochemistry Communications ( IF 5.4 ) Pub Date : 2020-03-21 , DOI: 10.1016/j.elecom.2020.106715 Shun Lu , Matthew Hummel , Ke Chen , Yue Zhou , Shuai Kang , Zhengrong Gu
Gold nanoparticles and zeolitic imidazolate framework-8 nanocomposites (Au@ZIF-8) were synthesized through a simple hydrothermal method and used as an enzyme-free sensor for dopamine detection. Various characterizations were used to investigate the structure and morphology of Au@ZIF-8 nanocomposites. The electrochemical performance of Au@ZIF-8 nanocomposite modified glassy carbon electrode (Au@ZIF-8/GCE) was examined in 0.1 M phosphate-buffered saline with different concentrations of dopamine. Consequently, Au@ZIF-8/GCE possessed an excellent electrochemical catalytic performance to dopamine, having been reported to its wider linear range from 0.1 to 50 μM, lower detection limit of 0.01 μM (S/N = 3) and higher sensitivity of 6.452 μA mM−1 cm−2. The proposed sensor exhibited acceptable stability and repeatability due to the coupling effect of Au nanoparticles and ZIF-8. All the evidence suggested a potential application of Au@ZIF-8 nanocomposites in a non-enzymatic dopamine sensor.
中文翻译:
Au @ ZIF-8纳米复合材料的合成用于增强多巴胺的电化学检测
通过简单的水热法合成了金纳米粒子和沸石咪唑盐骨架8纳米复合材料(Au @ ZIF-8),并用作多巴胺检测的无酶传感器。各种表征用于研究Au @ ZIF-8纳米复合材料的结构和形态。在具有不同浓度多巴胺的0.1 M磷酸盐缓冲盐水中检测了Au @ ZIF-8纳米复合修饰玻碳电极(Au @ ZIF-8 / GCE)的电化学性能。因此,Au @ ZIF-8 / GCE对多巴胺具有出色的电化学催化性能,据报道其线性范围从0.1到50μM,检测限较低,为0.01μM(S / N = 3),灵敏度更高,为6.452 μA毫米-1 厘米-2。由于金纳米粒子和ZIF-8的耦合作用,拟议的传感器表现出可接受的稳定性和可重复性。所有证据表明,Au @ ZIF-8纳米复合材料在非酶促多巴胺传感器中的潜在应用。