Abstract The present work demonstrates the fabrication and sensing performance of a free-standing paper electrode composed of boron oxide (B2O3) and graphene for the application of the simultaneous detection of melatonin (MEL) and ascorbic acid (AA). The flexible paper electrode (B-RGO) was fabricated through vacuum filtration of homogeneous composite dispersion (B-GO) consisting of B2O3 in GO, followed by chemical reduction with HI. The structural, chemical and morphological characterization of B-RGO composite paper was performed by using various techniques. This flexible paper electrode exhibited high sensitivity, wide linear range and low detection limit for the simultaneous determination of MEL and AA. The outstanding performance of B-RGO paper electrode could be attributed to the round-edged rod-like B2O3 structures between graphene layers, which provide an increment of the surface area and the electrochemical activity of the composite paper. Furthermore, this paper electrode showed high sensitivity and selectivity for the determination of MEL and AA in real sample analysis.

中文翻译：

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在新型柔性 B-RGO 复合纸电极上电化学同时传感褪黑激素和抗坏血酸

摘要 目前的工作展示了由氧化硼 (B2O3) 和石墨烯组成的独立纸电极的制备和传感性能，用于同时检测褪黑激素 (MEL) 和抗坏血酸 (AA)。柔性纸电极（B-RGO）是通过真空过滤由GO中的B2O3组成的均质复合分散体（B-GO），然后用HI进行化学还原来制造的。B-RGO 复合纸的结构、化学和形态表征是通过使用各种技术进行的。这种柔性纸电极在同时测定 MEL 和 AA 时表现出高灵敏度、宽线性范围和低检测限。B-RGO 纸电极的优异性能可归因于石墨烯层之间的圆边棒状 B2O3 结构，这增加了复合纸的表面积和电化学活性。此外，这种纸电极在实际样品分析中对 MEL 和 AA 的测定显示出高灵敏度和选择性。