Abstract Bacterial cellulose aerogels (BCAs) were obtained from a delicious food grade coconut. Following with a simple process of carbonized calcination (700 °C~1100 °C). The obtained coconut matrix carbon nanofiber aerogels (CMCNFs) exhibit low density (≤3.47 mg/cm3), high surface area (≥1102 m2/g), and high porosity (≈99.6%), which are much higher than those of common BCAs owing to the removal of hydrogen, oxygen and other elements along with only small volume changes. Due to the flexibility of the nanofiber matrix of our presoma, the three-dimensional network micro-structure is preserved during high temperature carbonization process. The obtained CMCNFs show an excellent conductivity bearing a direct electron transfer process between glucose oxidase (GOx) and electrode surface in the electrochemical processes. It was discovered that CMCNFs can achieve a fast direct electron transfer (DET) of GOx to the rapid detection of glucose. This character should be related to the three-dimensional pore structure determined by carbonization temperature, which has been proved that the CMCNFs calcined at 1000 °C possesses the best capabilities. With merits above, a highly sensitive glucose sensor is successfully prepared by the simple carbonization of coconut cellulose matrix, which expands the application scope of bacterial cellulose aerogels. This work also offers insights for the future develop of protein-based electrochemical devices.

中文翻译：

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从椰子基质中新合成碳纳米纤维气凝胶用于葡萄糖的电化学检测

摘要 细菌纤维素气凝胶 (BCA) 是从美味的食品级椰子中获得的。接下来是简单的碳化煅烧过程（700°C~1100°C）。获得的椰子基质碳纳米纤维气凝胶（CMCNFs）具有低密度（≤3.47 mg/cm3）、高表面积（≥1102 m2/g）和高孔隙率（≈99.6%），远高于普通BCA由于去除了氢、氧和其他元素，体积变化很小。由于我们的前体纳米纤维基质的柔韧性，三维网络微结构在高温碳化过程中得以保留。获得的CMCNFs显示出优异的导电性，在电化学过程中葡萄糖氧化酶（GOx）和电极表面之间具有直接的电子转移过程。发现CMCNFs可以实现GOx的快速直接电子转移（DET）以快速检测葡萄糖。这个特性应该与碳化温度决定的三维孔结构有关，这已经证明在 1000°C 煅烧的 CMCNFs 具有最好的性能。基于上述优点，通过椰子纤维素基质的简单碳化成功制备了一种高灵敏度的葡萄糖传感器，扩大了细菌纤维素气凝胶的应用范围。这项工作还为基于蛋白质的电化学装置的未来发展提供了见解。已证明在 1000 °C 下煅烧的 CMCNFs 具有最佳性能。基于上述优点，通过对椰子纤维素基质进行简单碳化，成功制备了一种高灵敏度的葡萄糖传感器，拓展了细菌纤维素气凝胶的应用范围。这项工作还为基于蛋白质的电化学装置的未来发展提供了见解。已证明在 1000 °C 下煅烧的 CMCNFs 具有最佳性能。基于上述优点，通过对椰子纤维素基质进行简单碳化，成功制备了一种高灵敏度的葡萄糖传感器，拓展了细菌纤维素气凝胶的应用范围。这项工作还为基于蛋白质的电化学装置的未来发展提供了见解。