Zhou Tingting, Zhao Xiaoya, Xu Yinghua, Tao Yun, Luo Dan, Hu Liqin, Jing Tao, Zhou Yikai, Wang Peng, Mei Surong
Department of Clinical Laboratory, The Affiliated Hospital of Qingdao University #16, Jiangsu Road Qingdao Shandong 266003 China.
Technology Center of Wuhan Customs Wuhan Hubei 430050 China
RSC Adv. 2020 Jan 10;10(4):2123-2132. doi: 10.1039/c9ra06980a. eCollection 2020 Jan 8.
Carbon nanotubes@zeolitic imidazole framework-67 (CNTs@ZIF-67), a conductive composite was prepared from carboxylic carbon nanotubes and a cobalt-imidazole framework. It possesses an excellent adsorption capacity (92.12 mg g) for the flame retardant tetrabromobisphenol A (TBBPA). The composite was characterized by transmission and scanning electron microscopy, FTIR and X-ray diffractometry. It was then used to modify an acetylene black electrode. Electrochemical studies showed the current response of the modified electrode to be larger than that of electrodes modified with CNTs-COOH or ZIF-67 only. Electrochemical impedance spectroscopy showed this material combination to improve the conductivity of ZIF-67. The addition of perfluorodecanoic acid further improves the response. The sensor is stable, reproducible, and has a linear range of 0.01-1.5 μM TBBPA concentration, with a 4.2 nM detection limit (at S/N = 3). The sensor was successfully applied to the detection of TBBPA in spiked rain and pool water samples.
碳纳米管@沸石咪唑框架-67（CNTs@ZIF-67），一种由羧基化碳纳米管和钴-咪唑框架制备的导电复合材料。它对阻燃剂四溴双酚A（TBBPA）具有出色的吸附容量（92.12 mg g）。通过透射电子显微镜、扫描电子显微镜、傅里叶变换红外光谱和X射线衍射对该复合材料进行了表征。然后用它来修饰乙炔黑电极。电化学研究表明，修饰电极的电流响应大于仅用羧基化碳纳米管（CNTs-COOH）或ZIF-67修饰的电极。电化学阻抗谱表明这种材料组合提高了ZIF-67的导电性。添加全氟癸酸进一步改善了响应。该传感器稳定、可重现，TBBPA浓度的线性范围为0.01 - 1.5 μM，检测限为4.2 nM（信噪比S/N = 3）。该传感器已成功应用于加标雨水和泳池水样中TBBPA的检测。
