School of Chemical Engineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan 44610, Republic of Korea.
School of Chemical Engineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan 44610, Republic of Korea.
Spectrochim Acta A Mol Biomol Spectrosc. 2022 Mar 5;268:120657. doi: 10.1016/j.saa.2021.120657. Epub 2021 Nov 23.
Low-cost nitrogen and boron-doped carbon nanodots (CPAP-CDs) with a high quantum yield (64.07%) were synthesized through a facile hydrothermal treatment. The obtained CPAP-CDs exhibited wide absorption, strong fluorescence, and pH-dependent behavior. The high fluorescence of CPAP-CDs was quenching in the presence of the nitrite ion in a concentration-dependent manner. The detection limit was as low as 6.6 nM with a wide linear detection range of 2 μM - 1 mM. Diazotization between the NO ion and CPAP-CDs resulted in the aggregation of CPAP-CDs and aggregation-induced emission quenching. The as-designed method was tested further with different water samples, such as tap, drinking, and seawater.
通过简便的水热法合成了具有高光量子产率（64.07%）的低成本氮、硼掺杂碳纳米点（CPAP-CDs）。所得 CPAP-CDs 表现出宽吸收、强荧光和 pH 依赖性。在亚硝酸盐离子存在下，CPAP-CDs 的高荧光以浓度依赖的方式猝灭。检测限低至 6.6 nM，线性检测范围为 2 μM-1 mM。NO 离子与 CPAP-CDs 之间的重氮化导致 CPAP-CDs 的聚集和聚集诱导的荧光猝灭。该设计方法进一步用不同的水样，如自来水、饮用水和海水进行了测试。
