Hou Juan, Gao Xu, Bao Siqi, Liu Shuqi, Yang Guang
Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology Changchun 130022 China
Department of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University Harbin 150040 China
RSC Adv. 2023 Apr 3;13(16):10508-10512. doi: 10.1039/d3ra01259j.
In this work, yellow emissive carbon dots (Y-CDs) were prepared a simple hydrothermal method using catechol and hydrazine hydrate as the carbon and nitrogen sources, respectively. The average particle size was 2.99 nm. The Y-CDs demonstrate excitation-dependent emission properties, and the maximum emission wavelength is 570 nm at = 420 nm. The fluorescence quantum yield is calculated to be 28.2%. Ag could quench the fluorescence of Y-CDs with high selectivity. The quenching mechanism was further explored by various characterization techniques. A sensitive fluorescent probe for Ag detection was established based on Y-CDs with a linear range of 3-300 μM. The detection limit was calculated to be 1.1 μM. The proposed method shows satisfactory results in real water samples without interference by coexistence.
在本工作中，采用简单的水热法，分别以邻苯二酚和水合肼作为碳源和氮源，制备了黄色发光碳点（Y-CDs）。平均粒径为2.99nm。Y-CDs表现出激发依赖的发射特性，在激发波长为420nm时，最大发射波长为570nm。计算得到荧光量子产率为28.2%。Ag能够以高选择性猝灭Y-CDs的荧光。通过各种表征技术进一步探究了猝灭机理。基于Y-CDs建立了一种用于Ag检测的灵敏荧光探针，线性范围为3-300μM。计算得到检测限为1.1μM。所提出的方法在实际水样中显示出令人满意的结果，不受共存物的干扰。
