CAJ | 학술논문

通过一步电沉积技术在玻碳电极表面构建了石墨烯-纳米金复合材料。将该复合材料与铋膜相结合，采用阳极溶出伏安法实现了对Pb(II)的检测。通过SEM对制备的石墨烯-纳米金复合材料进行了微观结构表征。拉曼光谱及电化学研究表明，石墨烯-纳米金复合材料具有良好的导电性和大的比表面积，修饰电极的电化学信号得到较明显增强，同时促进了铋膜预富集铅的能力，对Pb(II)检测灵敏度高，检测范围宽。在最佳实验条件下，其对Pb(II)浓度的定量测定线性范围为1~220μg?L-1，R=0.9987，检出限为0.1μg?L-1(S/N=3)。实际样品中铅的测定结果表明，该方法简便、可靠，具有实际应用价值。
통과일보전침적기술재파탄전겁표면구건료석묵희-납미금복합재료。장해복합재료여필막상결합，채용양겁용출복안법실현료대Pb(II)적검측。통과SEM대제비적석묵희-납미금복합재료진행료미관결구표정。랍만광보급전화학연구표명，석묵희-납미금복합재료구유량호적도전성화대적비표면적，수식전겁적전화학신호득도교명현증강，동시촉진료필막예부집연적능력，대Pb(II)검측령민도고，검측범위관。재최가실험조건하，기대Pb(II)농도적정량측정선성범위위1~220μg?L-1，R=0.9987，검출한위0.1μg?L-1(S/N=3)。실제양품중연적측정결과표명，해방법간편、가고，구유실제응용개치。
Graphene-Aunano (GR-Aunano) nanocomposites were prepared by a one-step deposition method. Trace Pb(II) detection was realized by using anodic stripping voltammetry combining GR-Aunano nanocomposites with Bi films. The morphology of the GR-Aunano nanocomposite was investigated by SEM. Raman spectra and electrochemical results indicate that the GR-Aunano modified electrode shows better electrochemical signal and can enhance the metal ion pre-concentrating ability of Bi films, which is due to high conductivity and large surface area of the GR-Aunano nanocomposite. Under the optimal condition, the sensor exhibits a linear detection of Pb(II) from 1 μg·L-1 to 220 μg·L-1 with correlation coefficient of 0.9987. The detection limit is 0.1 μg·L-1 with a signal to noise ratio of 3 (S/N= 3). Furthermore, the GR-Aunano modified electrode displays rapid response, high stability, good reproducibility and high sensitivity for Pb(II) detection in real application.