Nitrogen-doped carbon dots derived from mangosteen peel for the detection of Cr2O72− and vanillin

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-08-06 DOI:10.1016/j.jphotochem.2024.115945

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Abstract

Nitrogen-doped biomass carbon dots (MP-NCDs) based on mangosteen peel were prepared by one-step hydrothermal method. Transmission electron microscopy demonstrated that MP-NCDs were spherical and their particle size ranged from 2.6 to 5.0 nm. X-ray photoelectron spectroscopy indicated that they were composed of C, N, and O elements. Fourier transform infrared revealed that their surface was equipped with oxygen-containing and amino-containing groups. Bright blue light emission characteristics were demonstrated. They had high light stability in aqueous solution and salt solution. Furthermore, MP-NCDs could be utilized as a bifunctional fluorescent probe for detecting Cr₂O₇²⁻ and vanillin through the fluorescence quenching method, which exhibited high selectivity, sensitivity, and anti-interference performance. The detection limits of vanillin and Cr₂O₇²⁻ by MP-NCDs were determined to be 2.33 μM and 4.6 μM, respectively. A detailed analysis was conducted on the fluorescence quenching mechanism. The performance of the sensing system was tested in real samples using river water and infant formula as models.

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提取自山竹皮的掺氮碳点用于检测 Cr2O72- 和香兰素

一步水热法制备了基于山竹皮的掺氮生物质碳点（MP-NCDs）。透射电子显微镜显示，MP-NCDs 呈球形，粒径在 2.6 至 5.0 nm 之间。X 射线光电子能谱显示它们由 C、N 和 O 元素组成。傅立叶变换红外光谱显示，它们的表面含有含氧基团和含氨基基团。它们具有明亮的蓝光发射特性。它们在水溶液和盐溶液中具有很高的光稳定性。此外，MP-NCDs 可用作双功能荧光探针，通过荧光淬灭法检测 Cr2O72- 和香兰素，具有高选择性、灵敏度和抗干扰性能。经测定，MP-NCDs 对香兰素和 Cr2O72- 的检测限分别为 2.33 μM 和 4.6 μM。对荧光淬灭机制进行了详细分析。以河水和婴儿配方奶粉为模型，在实际样品中测试了传感系统的性能。

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.

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