Center for Smart Molecular Memory, Department of Chemistry and Department of Energy Science, Sungkyunkwan University, 2066 Seoburo, Jangan-gu, Suwon, Gyeonggi-do 440-746, Republic of Korea.
Nanoscale. 2015 Mar 19;7(13):5633-7. doi: 10.1039/c5nr00814j.
To prepare carbon-based fluorescent materials such as graphene quantum dots (GQDs), new and effective methods are needed to convert one-dimensional (1D) or two-dimensional (2D) carbon materials to 0D GQDs. Here, we report a novel acid-free and oxone oxidant-assisted solvothermal synthesis of GQDs using various natural carbon resources including graphite (G), multiwall carbon nanotubes (M), carbon fibers (CF), and charcoal (C). This acid-free method, not requiring the neutralization process of strong acids, exhibits a simple and eco-friendly purification process and also represents a recycling production process, together with mass production and high yield. Newly synthesized GQDs exhibited a strong blue photoluminescence (PL) under 365 nm UV light illumination. The PL emission peaks of all the recycled GQDs did not change.
为了制备基于碳的荧光材料，如石墨烯量子点（GQDs），需要新的、有效的方法将一维（1D）或二维（2D）碳材料转化为 0D GQDs。在这里，我们报告了一种使用各种天然碳资源（包括石墨（G）、多壁碳纳米管（M）、碳纤维（CF）和木炭（C）），在无酸和过氧单磺酸钾氧化剂辅助下，通过溶剂热合成制备 GQDs 的新方法。这种无酸方法不需要强酸的中和过程，具有简单、环保的纯化过程，同时也是一种循环生产过程，可实现大规模生产和高产量。新合成的 GQDs 在 365nm 紫外光照射下表现出强烈的蓝色光致发光（PL）。所有回收 GQDs 的 PL 发射峰都没有变化。
