Waste chicken eggshell as low-cost precursor for efficient synthesis of nitrogen-doped fluorescent carbon nanodots and their multi-functional applications
Waste chicken eggshell as low-cost precursor for efficient synthesis of nitrogen-doped fluorescent carbon nanodots and their multi-functional applications
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DOI：
10.1039/c4ra10178b
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发表时间：
2014-01-01
期刊：
影响因子：
3.9
通讯作者：
Ling, Yong-Chien
中科院分区：
文献类型：
--
作者：
Ke, Yaotang;Garg, Bhaskar;Ling, Yong-Chien
以煅烧处理过的废鸡蛋壳为原料，提出了一种自上而下一步高效合成氮掺杂碳纳米点的新方法。基于尿素作为掺杂剂的使用，合成的NCND被称为NCND 1（无掺杂）和NCND 2。结构和成分分析表明，ncnd2的平均粒径为2.6 nm，晶格间距为0.38 nm，为非晶碳结构。尽管氮含量低（约为4%），但制备的NCND 1也表现出优异的光致发光性能，低细胞毒性，可以与NCND 2结合有效地用于生物成像。ncnd2的多功能能力进一步证明了冲压，印刷和法医应用。这项工作可能为利用碳质废物作为潜在的前体在碳纳米材料的合成中获得广泛的技术应用铺平道路。
A novel one-step top-down method is developed for the efficient synthesis of nitrogen-doped carbon nanodots (NCNDs) by using calcination treatment of waste chicken eggshell as resources. Based on the usage of urea as a dopant, the as-synthesized NCNDs are referred to as NCND 1 (no dopant) and NCND 2. The structural and composition analysis indicate that NCND 2 possesses a mean particle diameter of 2.6 nm and an amorphous carbon structure with a lattice spacing of 0.38 nm. Despite having a low N-content (similar to 4%), the as-prepared NCND 1 was also found to exhibit excellent photoluminescent properties, low cytotoxicity and could be effectively used for bioimaging, in conjunction with NCND 2. The multi-functional capability of NCND 2 is further demonstrated for stamping, printing, and forensic applications. This work may pave the way for employing carbonaceous waste materials as potential precursors in the synthesis of carbon nanomaterials for wide technological applications.