Zhao Qiang, Zhang Ke, Yu Guangxia, Wu Weixiang, Wei Xiaoyun, Lu Qing
Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, #13 Hangkong Road, Wuhan, Hubei, 430030, China.
Department of Clinical Laboratory, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, #1277 jiefang Road, Wuhan, Hubei 430022, China.
Talanta. 2016 May 1;151:209-216. doi: 10.1016/j.talanta.2016.01.033. Epub 2016 Jan 18.
In this study, surface-functionalized nitrogen-doped graphene was prepared with 1, 3, 6, 8-pyrenetetrasulfonic acid tetrasodium salt in a simple way. The characteristics of the material were demonstrated by UV-vis absorption spectra, X-ray photoelectron spectroscopy, and electrochemical experiments. Then, the glassy carbon electrode was modified by the functionalized nitrogen-doped graphene and hexadecyltrimethylammonium bromide for tetrabromobisphenol A (TBBPA) determination. The oxidation current response of TBBPA was enhanced at the modified electrode and the mechanism was investigated. Upon the optimization of assay parameters, including pH value, accumulation potential and time, the oxidation current was linearly related to the concentration of TBBPA in the range of 0.01-1μM with a detection limit of 9nM. Moreover, the modified electrode was applied to detect TBBPA in water samples with simple, low cost, and high efficiency.
在本研究中，采用1, 3, 6, 8-芘四磺酸四钠盐以简单的方式制备了表面功能化的氮掺杂石墨烯。通过紫外可见吸收光谱、X射线光电子能谱和电化学实验对该材料的特性进行了表征。然后，用功能化的氮掺杂石墨烯和十六烷基三甲基溴化铵修饰玻碳电极用于测定四溴双酚A（TBBPA）。研究了修饰电极上TBBPA氧化电流响应增强的情况及其机理。在优化分析参数（包括pH值、富集电位和时间）后，氧化电流与TBBPA浓度在0.01 - 1μM范围内呈线性关系，检测限为9nM。此外，该修饰电极可用于简单、低成本且高效地检测水样中的TBBPA。
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