Wang Min, Bai Lu, Zhang Lingling, Sun Guangping, Zhang Xiaowei, Dong Shaojun
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun 130022, Jilin, P.R. China.
Analyst. 2016 Apr 21;141(8):2447-53. doi: 10.1039/c6an00016a. Epub 2016 Mar 16.
Porous silk carbon (Silk C) was obtained through carbonization and KOH activation of natural silk cocoons. The as-prepared Silk C presented the good characteristics of a large surface area (SBET: 2854.53 m(2) g(-1)) and a high volume of pores (1.54 cm(3) g(-1)) with uniform micropores (2.5 nm) and multiple defects. The metal-free silk carbon-ionic liquid (Silk C-IL) composite, synthesized by modifying Silk C with ionic liquid through non-covalent (π-π) interactions under grinding conditions, was prepared for electrochemical determination of dopamine (DA). The detection limit of DA was 79 nM (S/N = 3) with a linear range from 0.6 μM to 140 μM. Meanwhile, the as-made Silk C-IL/GCE presented good selectivity for DA detection from other possible interferences, such as ascorbic acid, glucose and uric acid. Furthermore, the Silk C-IL/GCE was also successfully used for the detection of DA in fetal bovine serum and dopamine hydrochloride injection samples.
通过对天然蚕茧进行碳化和KOH活化制备了多孔丝炭（丝炭C）。所制备的丝炭C具有大表面积（比表面积：2854.53 m² g⁻¹）和高孔隙率（1.54 cm³ g⁻¹）的良好特性，具有均匀的微孔（2.5 nm）和多个缺陷。通过在研磨条件下通过非共价（π-π）相互作用用离子液体修饰丝炭C合成了无金属丝炭-离子液体（丝炭C-IL）复合材料，用于多巴胺（DA）的电化学测定。DA的检测限为79 nM（S/N = 3），线性范围为0.6 μM至140 μM。同时，所制备的丝炭C-IL/GCE对DA检测具有良好的选择性，可避免其他可能的干扰，如抗坏血酸、葡萄糖和尿酸。此外，丝炭C-IL/GCE还成功用于检测胎牛血清和盐酸多巴胺注射液样品中的DA。
