Carbon nanofibers are hydrophobic with poor dispersion in water. They are normally functionalised using highly acidic solutions and elevated temperatures. In this communication, we show that tannic acid can be employed at room temperature using a simple sonication method to give very good dispersions of the CNFs in distilled water. Using a factorial design, the three components, the sonication period, the concentration of tannic acid and the concentration of CNFs were found to be significant, while the concentration of the tannic acid as a single component had an equally significant effect. The optimum conditions were 1.0–1.25 mg mL of CNFs, and 0.85 – 1.0 mM of tannic acid with a sonication period between 50 and 60 min. The well-dispersed CNFs exhibited very good electrochemical characteristics, with efficient electron transfer in the oxidation of acetaminophen, which was used as a model analyte.

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碳纳米纤维在水中天然多酚的简单分散及其电化学特性

碳纳米纤维具有疏水性，在水中的分散性较差。它们通常使用高酸性溶液和高温进行官能化。在这篇文章中，我们表明，单宁酸可以在室温下使用简单的超声处理方法，使 CNF 在蒸馏水中得到非常好的分散。使用因子设计，发现三个组分、超声处理时间、单宁酸浓度和 CNF 浓度具有显着性，而单宁酸浓度作为单一组分也具有同样显着的影响。最佳条件为 1.0–1.25 mg/mL 的 CNF 和 0.85 – 1.0 mM 的单宁酸，超声处理时间为 50 至 60 分钟。分散良好的 CNF 表现出非常好的电化学特性，在对乙酰氨基酚的氧化过程中具有有效的电子转移，对乙酰氨基酚被用作模型分析物。