Ezhil Vilian A T, Kang Sung-Min, Yeong Oh Seo, Woo Oh Cheol, Umapathi Reddicherla, Suk Huh Yun, Han Young-Kyu
Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul 100-715, Republic of Korea.
Department of Biological Engineering, Inha University, Incheon 22212, Republic of Korea.
Food Chem. 2020 Apr 18;323:126848. doi: 10.1016/j.foodchem.2020.126848.
Consumption of sunset yellow (SY) above a certain concentration through food products may leads to adverse health issues. Therefore, it is imperative to develop technologies for rapid and selective detection of SY. Herein, a flower-like reduced graphene oxide (rGO)-graphitic carbon nitride (g-CN)/ZnO-Au nanoparticle (NPs) has been prepared and utilized for the specific detection of SY. The fabricated rGO-g-CN/ZnO-AuNPs composite was characterized and investigated by XRD, FTIR, SEM, TEM, XPS, EIS, and voltammetry techniques. Characterization techniques elucidated the deposition of ZnO-AuNPs on to the rGO-g-CN and successful fabrication of rGO-g-CN/ZnO-AuNPs composite. rGO-g-CN/ZnO-AuNPs composite possesses excellent catalytic activity for the oxidation of SY. Developed rGO-g-CN/ZnO-AuNPs sensor exhibits LOD of 1.34 nM for SY concentrations ranging from 5 to 85 nM. Noteworthily, the sensor has been successfully employed for the detection and recovery of SY in real-time samples. Fabricated composite opens up new avenues to develop electrochemical sensor for food safety.
通过食品摄入超过一定浓度的日落黄（SY）可能会导致健康问题。因此，开发快速、选择性检测SY的技术势在必行。在此，制备了一种花状还原氧化石墨烯（rGO）-石墨相氮化碳（g-CN）/氧化锌-金纳米颗粒（NPs），并将其用于SY的特异性检测。通过XRD、FTIR、SEM、TEM、XPS、EIS和伏安法技术对制备的rGO-g-CN/ZnO-AuNPs复合材料进行了表征和研究。表征技术阐明了ZnO-AuNPs在rGO-g-CN上的沉积以及rGO-g-CN/ZnO-AuNPs复合材料的成功制备。rGO-g-CN/ZnO-AuNPs复合材料对SY的氧化具有优异的催化活性。所开发的rGO-g-CN/ZnO-AuNPs传感器对5至85 nM范围内的SY浓度表现出1.34 nM的检测限。值得注意的是，该传感器已成功用于实时样品中SY的检测和回收率测定。制备的复合材料为开发用于食品安全的电化学传感器开辟了新途径。
