Budimir Milica, Marković Zoran, Jovanović Dragana, Vujisić Miloš, Mičušík Matej, Danko Martin, Kleinová Angela, Švajdlenková Helena, Špitalský Zdeno, Marković Biljana Todorović
Vinča Institute of Nuclear Sciences, University of Belgrade Mike Petrovića Alasa 12-14 11001 Belgrade Serbia
School of Electrical Engineering, University of Belgrade Bulevar kralja Aleksandra 73 11000 Belgrade Serbia.
RSC Adv. 2019 Feb 21;9(11):6278-6286. doi: 10.1039/c9ra00500e. eCollection 2019 Feb 18.
In recent years, water pollution and contamination had become a major threat to the ecosystem. However, the use of nanostructured materials has been proven as a very promising approach in the treatment of polluted water. The present study reports the results of the gamma ray-assisted modification of hydrophobic carbon quantum dot (hCQD)/polyurethane nanocomposites for photocatalytic degradation of organic dyes. Different characterization methods were applied to investigate the influence of the different doses of gamma irradiation (1, 10 and 200 kGy) on the physical and chemical properties of nanocomposites (morphology, chemical content, mechanical properties, wettability, and potential for singlet oxygen generation). Surface morphology and mechanical properties analyses showed that gamma rays induced insignificant changes in the structure of nanocomposites, but the potential for singlet oxygen generation increased significantly. Here we also explore, in detail, the photocatalytic properties of gamma-ray modified hCQDs/polyurethane nanocomposites. UV-vis analysis showed that the removal efficiency of the rose bengal dye reached up to 97% for the nanocomposite irradiated with the dose of 200 kGy.
近年来，水污染和污染已成为对生态系统的重大威胁。然而，纳米结构材料的使用已被证明是一种非常有前景的处理污染水的方法。本研究报告了γ射线辅助改性疏水性碳量子点（hCQD）/聚氨酯纳米复合材料用于光催化降解有机染料的结果。应用不同的表征方法来研究不同剂量的γ辐射（1、10和200 kGy）对纳米复合材料的物理和化学性质（形态、化学组成、机械性能、润湿性和单线态氧生成潜力）的影响。表面形态和机械性能分析表明，γ射线对纳米复合材料的结构引起的变化不显著，但单线态氧生成潜力显著增加。在此我们还详细探讨了γ射线改性的hCQDs/聚氨酯纳米复合材料的光催化性能。紫外可见分析表明，对于剂量为200 kGy辐照的纳米复合材料，孟加拉玫瑰红染料的去除效率高达97%。
