Zhou Tuantuan, Gao Wanlin, Wang Qiang, Umar Ahmad
College of Environmental Science and Engineering, Beijing Forestry University, Haidian District, Beijing 100083, P. R. China.
Department of Chemistry, College of Science and Arts, Najran University, Najran-11001, Kingdom of Saudi Arabia.
J Nanosci Nanotechnol. 2018 May 1;18(5):3499-3504. doi: 10.1166/jnn.2018.14639.
Herein, we report the facile synthesis of high-aspect ratio perforated Co3O4 nanowires derived from cobalt-carbonate-hydroxide (Co(CO3)0.5(OH) 0.11H2O) nanowires. The Co(CO3)0.5(OH) 0.11H2O nanowires were synthesized by simple hydrothermal process at 120 °C while annealing of such nanowires at 400 °C leads the formation of perforated Co3O4 nanowires. The prepared nanowires were characterized by several techniques which confirmed the high aspect ratio and well-crystallinity for the synthesized nanowires. For application point of view, the prepared perforated Co3O4 nanowires were used as efficient electrode material to fabricate highly sensitive and selective hydrazine chemical sensor. The electrochemical impedance spectroscopy (EIS) technique was employed to confirm the successful modification of the electrode. The key parameters of chemical sensor, such as detection limit, sensitivity, and linear range, have been systematically explored. The fabricated hydrazine sensor displayed a rather low detection limit of 4.52 μM (S/N = 3), a good sensitivity of 25.70 μA · mM-1, and a wide linear range of 16.97-358.34 μM.
在此，我们报道了一种由碱式碳酸钴（Co(CO3)0.5(OH) 0.11H2O）纳米线简便合成高长径比多孔Co3O4纳米线的方法。碱式碳酸钴纳米线是在120℃通过简单水热法合成的，而将此类纳米线在400℃退火则会形成多孔Co3O4纳米线。通过多种技术对制备的纳米线进行了表征，证实了合成的纳米线具有高长径比和良好的结晶性。从应用角度来看，制备的多孔Co3O4纳米线被用作高效电极材料来制造高灵敏度和选择性的肼化学传感器。采用电化学阻抗谱（EIS）技术确认了电极的成功修饰。系统地探索了化学传感器的关键参数，如检测限、灵敏度和线性范围。所制备的肼传感器显示出相当低的检测限，为4.52 μM（S/N = 3），良好的灵敏度为25.70 μA·mM-1，以及16.97 - 358.34 μM的宽线性范围。
