School of Electronic Communication Technology, Shenzhen Institute of Information Technology, Shenzhen 518172, China; College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
School of Electronic Communication Technology, Shenzhen Institute of Information Technology, Shenzhen 518172, China.
Ecotoxicol Environ Saf. 2021 Dec 1;225:112745. doi: 10.1016/j.ecoenv.2021.112745. Epub 2021 Sep 1.
In the present work, hematite-boron-carbonitride (FeO-BCN) nanosheets were synthesized by a simple hydrothermal reaction and the following high temperature treatment. The morphology, structure and chemical composition of the as-prepared material were carefully characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The FeO-BCN nanosheets were used to modified on the surface of the glassy carbon electrode to fabricate an electrochemical sensor for lead ions (Pb(II)) via differential pulse anodic stripping voltammetry (DPASV). At the same time, the influence of the modification concentration, solution acidity, deposition potential and deposition time on response peak current of Pb(II) at the FeO-BCN-based electrochemical sensor was well investigated. Under the optimized conditions, the electrochemical signal and concentration of Pb(II) show two-stage linear relationship in the range of 0.5 - 40 μg/L and 40 -140 μg/L, with a limit of detection (LOD) of 0.129 μg/L. The FeO-BCN-based electrochemical sensor shows excellent selectivity and anti-interference ability in the anti-interference experiments and actual sample analysis experiments, revealing its broad application in environmental monitoring of Pb(II).
在本工作中，通过简单的水热反应和随后的高温处理合成了赤铁矿-硼碳氮化物（FeO-BCN）纳米片。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X 射线衍射（XRD）和 X 射线光电子能谱（XPS）对所制备材料的形貌、结构和化学组成进行了仔细的表征。将 FeO-BCN 纳米片用于修饰玻碳电极表面，通过差分脉冲阳极溶出伏安法（DPASV）制备用于检测铅离子（Pb(II)）的电化学传感器。同时，研究了修饰浓度、溶液酸度、沉积电位和沉积时间对基于 FeO-BCN 的电化学传感器中 Pb(II)响应峰电流的影响。在优化条件下，电化学信号和 Pb(II)浓度在 0.5-40μg/L 和 40-140μg/L 范围内呈现出两段线性关系，检测限（LOD）为 0.129μg/L。基于 FeO-BCN 的电化学传感器在抗干扰实验和实际样品分析实验中表现出优异的选择性和抗干扰能力，表明其在 Pb(II)的环境监测中有广阔的应用前景。
