Abstract An alternative way to produce Graphene Quantum Dots (GQDs) economically is proposed in this study where corn powder was used as a green precursor to fabricate GQDs in a hassle less one-step route. These GQDs showed a stable, size-dependent in aqueous solution. The size of GQDs obtained from this work is approximately measure from 0.21 to 5.20 nm. The XRD patterns showed a broad peak at 22 Å. Furthermore, the UV-vis absorption spectrum has a broad peak around the range of 250–350 nm which is ascribed to the typical absorption of n-π* transition of the carbonyl groups. The said sample also exhibited bright green photoluminescence under an UV light. The Raman spectra displayed a D band around 1375 cm−1 and G band around 1578 cm−1. The performed analysis confirms that the GQDs by this method has a similar result compared to the other methods. This suggests that corn powder as a precursor can be used to fabricate GQDs in a simplistic and environment-friendly way for potential application in sensors, very large scale integration and energy generation technology.

中文翻译：

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可持续 GQDs 在以玉米粉为绿色前驱体的工程中的潜在应用

摘要 本研究提出了一种经济地生产石墨烯量子点 (GQD) 的替代方法，其中玉米粉用作绿色前体，以简单的一步法制造 GQD。这些 GQD 在水溶液中表现出稳定的大小依赖性。从这项工作中获得的 GQD 的大小大约为 0.21 到 5.20 nm。XRD 图案显示在 22 Å 处有一个宽峰。此外，UV-vis 吸收光谱在 250-350 nm 范围内有一个宽峰，这归因于羰基的 n-π* 跃迁的典型吸收。所述样品在紫外光下也呈现亮绿色光致发光。拉曼光谱在 1375 cm-1 附近显示 D 带，在 1578 cm-1 附近显示 G 带。执行的分析证实，与其他方法相比，此方法的 GQD 具有相似的结果。