Nazar Muhammad, Hasan Muhammad, Wirjosentono Basuki, Gani Basri A, Nada Cut Elvira
Graduate School of Mathematics and Applied Sciences, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia.
Department of Chemistry Education, Universitas Syiah Kuala, Kopelma Darussalam, Banda Aceh 23111, Indonesia.
ACS Omega. 2024 Apr 24;9(18):20571-20581. doi: 10.1021/acsomega.4c02254. eCollection 2024 May 7.
In this study, carbon quantum dots (CQDs), which were synthesized from arabica coffee ground-derived activated carbon, have been successfully employed as a fluorescence sensor to detect Fe ions. CQDs were fabricated using microwave heating for 5-10 min, which emitted vibrant blue light at 455 nm when exposed to excitation at 365 nm. Dynamic light scattering (DLS) analysis revealed that the average size of CQDs was 10.12 nm with a quantum yield of 6.01%. Fluorescence detection was developed for sensing Fe, Pb, and Cr ions. The addition of the three metal ions resulted in a decrease in the fluorescence (FL) intensity of the CQDs, with the addition of Fe ions demonstrating a more significant decrease in FL compared to the addition of both Cr and Pb ions. The results indicated that the CQDs synthesized from activated carbon of arabica coffee waste performed as a selective fluorescent detector for Fe ions, with a detection limit of 0.27 μM.
在本研究中，由阿拉比卡咖啡渣衍生的活性炭合成的碳量子点（CQDs）已成功用作检测铁离子的荧光传感器。通过微波加热5 - 10分钟制备了CQDs，当在365nm激发下时，其在455nm处发出明亮的蓝光。动态光散射（DLS）分析表明，CQDs的平均尺寸为10.12nm，量子产率为6.01%。开发了用于传感铁、铅和铬离子的荧光检测方法。添加这三种金属离子导致CQDs的荧光（FL）强度降低，与添加铬和铅离子相比，添加铁离子导致FL强度下降更显著。结果表明，由阿拉比卡咖啡渣活性炭合成的CQDs作为铁离子的选择性荧光检测器，检测限为0.27μM。
