Synthesis of Mn3O4 nanoparticles/nitrogen-doped graphene hybrid composite for nonenzymatic glucose sensor
Synthesis of Mn3O4 nanoparticles/nitrogen-doped graphene hybrid composite for nonenzymatic glucose sensor
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DOI：
10.1016/j.snb.2015.06.110
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发表时间：
2015-12
影响因子：
8.4
通讯作者：
Suling Yang;Gang Li;Guifang Wang;Junhong Zhao;Xiu-hua Gao;Ling‐bo Qu
中科院分区：
文献类型：
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作者：
Suling Yang;Gang Li;Guifang Wang;Junhong Zhao;Xiu-hua Gao;Ling‐bo Qu
通过简单的方法制备了一种新型的Mn3O4纳米颗粒（Mn3O4 NPs）修饰的氮掺杂石墨烯（N-GR），并制备了Mn3O4 NPs/N-GR修饰碳糊电极（CPE）。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）和电化学等手段对Mn3O4 NPs/N-GR进行了表征，XPS检测到石墨烯表面存在大量的N（约占原子比的9.86%）。将Mn3O4纳米颗粒（50-80 nm）均匀包覆在N-GR上，制备了Mn3O4纳米颗粒/N-GR/CPE非酶葡萄糖传感器，其响应电流约为100mA。10-倍高于纯CPE。在最佳测定条件下，Mn3O4 NPs/N-GR/CPE对葡萄糖的检测范围为2.5 - 529.5 μ M，检出限为1.0 μ M（S/N = 3）。该方法已成功地应用于人尿样中葡萄糖的测定。
Through a simple method, a new kind of Mn3O4nanoparticles (Mn3O4NPs) decorated nitrogen-doped graphene (N-GR) was synthesized firstly, and then a Mn3O4NPs/N-GR modified carbon paste electrode (CPE) was fabricated. Several techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and electrochemistry, were performed to characterize Mn3O4NPs/N-GR. A large amount of N on the graphene surface (about 9.86% of atomic ratio) was detected by XPS. Mn3O4nanoparticles (50–80 nm) homogeneously coated on N-GR. Mn3O4NPs/N-GR/CPE was used for sensitive non-enzymatic glucose sensing, which exhibited the response current of glucose ca. 10-fold higher than that of pure CPE. Under the optimum determination conditions, Mn3O4NPs/N-GR/CPE provided glucose with a broader detection range of 2.5–529.5 μM with a low detection limit (1.0 μM, S/N = 3). This novel method was successfully used to determine glucose in human urine sample.