Ionic liquids have excellent physical and chemical properties, enabling them to be widely used in electrochemical oxygen sensors. In recent years, the preparation of modified materials and ionic liquids mixed to improve the oxygen sensitivity of sensors has become a hotspot. In this study, 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF₆), which is a liquid at room temperature, was successfully prepared by a simple one-pot method, and BMIMPF₆ reacts at different oxygen concentrations. Bamboo-like carbon nanotube (BCNT) composites containing cobalt nanoparticles derived from graphite phase carbon nitride (g-C₃N₄) were prepared and fully mixed with the ionic liquid to form the BCNT/Co + BMIMPF₆ composite. The electrochemical behavior of oxygen in the electrochemical sensor was studied. The results show that the response current and stability of the oxygen sensor based on the BCNT/Co + BMIMPF₆ composite are significantly improved, the sensitivity is 1.15 μA/[%O₂], the response time is 16 s, and the linearity is good.

中文翻译：

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含有钴纳米粒子的竹状碳纳米管复合材料与咪唑基离子液体结合增强氧传感器的性能

离子液体具有优异的物理和化学性质，使其在电化学氧传感器中得到广泛应用。近年来，改性材料与离子液体混合制备以提高传感器的氧敏感性已成为研究热点。本研究通过简单的一锅法成功制备了室温下为液体的1-丁基-3-甲基咪唑六氟磷酸盐（BMIMPF _{6 ），并且BMIMPF 6}在不同的氧气浓度下发生反应。制备含有源自石墨相氮化碳(gC ₃ N ₄ )的钴纳米粒子的竹状碳纳米管(BCNT)复合材料，并将其与离子液体充分混合以形成BCNT/Co + BMIMPF ₆复合材料。研究了电化学传感器中氧的电化学行为。结果表明，基于BCNT/Co+BMIMPF ₆复合材料的氧传感器的响应电流和稳定性显着提高，灵敏度为1.15 μA/[%O ₂ ]，响应时间为16 s，线性度为好的。