Nitrogen-Doped Porous Carbon-ZnO Nanopolyhedra Derived from ZIF-8: New Materials for Photoelectrochemical Biosensors.
Nitrogen-Doped Porous Carbon-ZnO Nanopolyhedra Derived from ZIF-8: New Materials for Photoelectrochemical Biosensors.
复制标题
DOI：
10.1021/acsami.7b10856
复制
发表时间：
2017-11
影响因子：
9.5
通讯作者：
Ruiying Yang;Xiaoxia Yan;Yanmei Li;Xiaohua Zhang;Jinhua Chen
中科院分区：
文献类型：
--
作者：
Ruiying Yang;Xiaoxia Yan;Yanmei Li;Xiaohua Zhang;Jinhua Chen
本文采用直接碳化法在氮气气氛下制备了新型光活性材料氮掺杂多孔碳-ZnO（NPC-ZnO）纳米多面体。采用扫描电子显微镜、透射电子显微镜、X射线光电子能谱、拉曼光谱、氮气吸附-脱附法和光电化学（PEC）方法对样品的形貌、结构和光电化学性能进行了表征。结果表明，所制备的NPC-ZnO纳米多角体具有菱形十二面体形貌，粒径均匀，约为100 nm，比表面积高达609.2 m2 g-1。在可见光照射下，NPC-ZnO纳米多面体在含有溶解氧和抗坏血酸的水介质中表现出比ZnO纳米棒和ZIF-8纳米多面体更好的PEC性能。以碱性磷酸酶（ALP）为模型，研制了一种基于NPC-ZnO纳米多面体的PEC传感器，该传感器对ALP的检测具有良好的线性响应范围（2 ~ 1500 U L-1）和低检测限（1.7 U L-1）。此外，PEC传感器具有可接受的选择性，重现性和稳定性。NPC-ZnO纳米多面体为PEC传感器的构建提供了一种新的光活性材料，并可能在重金属离子、有机污染物和生物分子的PEC检测中具有广阔的应用前景。
Herein, novel photoactive materials, nitrogen-doped porous carbon-ZnO (NPC-ZnO) nanopolyhedra, were prepared by direct carbonization of zeolitic imidazolate framework (ZIF)-8 nanopolyhedra in a nitrogen atmosphere. The morphology, structure, and photoelectrochemical (PEC) properties were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, nitrogen adsorption-desorption method, and PEC methods. The results showed that the obtained NPC-ZnO nanopolyhedra had a rhombic dodecahedron morphology with uniform particle size of about 100 nm and a high surface area of 609.2 m2 g-1. Under visible-light irradiation, the NPC-ZnO nanopolyhedra showed better PEC performance than ZnO nanorod and the ZIF-8 nanopolyhedra in aqueous media with dissolved oxygen and ascorbic acid. Taking alkaline phosphatase (ALP) as a model, a NPC-ZnO nanopolyhedra-based PEC sensor was developed and showed good performance for ALP assay with a wide linear response range from 2 to 1500 U L-1 and a low detection limit of 1.7 U L-1. Moreover, the PEC sensor possessed acceptable selectivity, reproducibility, and stability. The prepared NPC-ZnO nanopolyhedra provide a new photoactive material for the construction of PEC sensors and may have promising applications in PEC assay of heavy metal ions, organic pollutants, and biomolecules.