Zhou Ying, Liu Yao, Li Yeqing, He Ziying, Xu Quan, Chen Yusheng, Street Jason, Guo Hao, Nelles Michael
Faculty of Agricultural and Environmental Sciences, Department Waste Management, University of Rostock Justus-v.-Liebig-Weg 6 18059 Rostock Germany
Research Institute for New Materials Technology, Chongqing University of Arts and Sciences Chongqing 402160 China.
RSC Adv. 2018 Jun 29;8(42):23657-23662. doi: 10.1039/c8ra03272f. eCollection 2018 Jun 27.
Multicolor carbon dots (C-dots) have excellent performance characteristics, high photoluminescence efficiency, ease of fabrication and low toxicity. C-dots have been used in a wide variety of fields including bioimaging, biomedicine, photocatalysis and environmental monitoring. The mass production of multicolor CDs using low-cost, facile methods is an important issue for future industrial applications. In this article, we reported a simple and highly effective way to prepare the multicolor C-dots and use them to detect heavy metal iron ions. Hydrochar acquired from food waste processed with hydrothermal carbonization (HTC) was used as the carbonaceous material for this process. Four colors of C-dots were obtained and included blue, green, yellow and red. These multicolor C-dots could be used as fluorescence probes with unique selectivity to detect the Fe ion. The luminescence response ranged from 1 to 50 μM with a correlation coefficient of 0.9968. This discovery not only shows the high value-added products which can be obtained from food waste but can also lead to new developments in carbonaceous materials which can be used as "green resources".
多色碳点（C点）具有优异的性能特点、高光致发光效率、易于制备且毒性低。C点已被应用于包括生物成像、生物医学、光催化和环境监测在内的广泛领域。采用低成本、简便方法大规模生产多色碳点是未来工业应用的一个重要问题。在本文中，我们报道了一种制备多色C点并用于检测重金属铁离子的简单且高效的方法。通过水热碳化（HTC）处理食品废料得到的水热炭被用作该过程的含碳材料。获得了四种颜色的C点，包括蓝色、绿色、黄色和红色。这些多色C点可用作具有独特选择性的荧光探针来检测铁离子。发光响应范围为1至50μM，相关系数为0.9968。这一发现不仅展示了可从食品废料中获得的高附加值产品，还能引领用作“绿色资源”的含碳材料的新发展。
