Chen Dejian, Zhou Haifeng, Li Hao, Chen Jie, Li Shunxing, Zheng Fengying
College of Chemistry and Environment, Minnan Normal University, Zhangzhou, Fujian, 363000, China.
School of Information and Technology, Northwest University, Xian, Shaanxi, 710069, China.
Sci Rep. 2017 Nov 3;7(1):14985. doi: 10.1038/s41598-017-15129-7.
Nitrogen doped hierarchical porous carbon materials (HPCs) was achieved by the successful carbonization, using pig lung as biomass precursor. Three-dimensional HPCs constituted with sheets and lines were synergistically inherited from original pig lung. Such structure provided a large specific surface area (958.5 g m) and rich porous, effectively supported a large number of electro-active species, and greatly enhanced the mass and electron transfer. High graphitization degree of HPCs resulted in good electrical conductivity. Furthermore, the different electronegativity between nitrogen and carbon atoms in HPCs could affect the electron cloud distribution, polarity and then the electrochemical oxidation kinetics of dihydroxybenzene isomers. Based on these characteristics of HPCs, the electrochemical sensor for dihydroxybenzene isomers exhibited high sensitivity, excellent specificity and stability. Quantitative analysis assays by differential pulse voltammetry (DPV) technology showed that the sensor has wide linear ranges (0.5-320, 0.5-340 and 1-360 μmol L) and low detection limits (0.078, 0.057 and 0.371 μmol L) for the catechol, resorcinol and hydroquinone, respectively. This proposed method was successfully applied for simultaneous detection of dihydroxybenzene isomers in river water.
以猪肺为生物质前驱体，通过成功碳化制备出氮掺杂分级多孔碳材料（HPCs）。由片状和线状构成的三维HPCs协同继承了原始猪肺的结构。这种结构提供了较大的比表面积（958.5 g/m）和丰富的孔隙，有效负载了大量的电活性物质，并极大地增强了质量和电子传递。HPCs的高石墨化程度导致其具有良好的导电性。此外，HPCs中氮原子和碳原子之间不同的电负性会影响电子云分布、极性，进而影响二羟基苯异构体的电化学氧化动力学。基于HPCs的这些特性，用于检测二羟基苯异构体的电化学传感器表现出高灵敏度、优异的特异性和稳定性。通过差分脉冲伏安法（DPV）技术进行的定量分析测定表明，该传感器对儿茶酚、间苯二酚和对苯二酚分别具有宽线性范围（0.5 - 320、0.5 - 340和1 - 360 μmol/L）和低检测限（0.078、0.057和0.371 μmol/L）。该方法成功应用于河水中二羟基苯异构体的同时检测。
