Rapid synthesis of nitrogen-doped carbon dots by microwave method for sensitive detection of co(II) in water environment

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Diamond and Related Materials Pub Date : 2024-11-27 DOI:10.1016/j.diamond.2024.111830

Junmei Liu, Yu Zhang, Xirui Miao, Haichao Li, Chunying Tao, Jin Liu, Xudong Yang

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Abstract

Novel nitrogen-doped carbon dots (N-CDs) were prepared by microwave method using o-phenylenediamine and formamide as raw materials, and the N-CDs were used successfully for sensing Co(II) on the basis of photoluminescence quenching. The structural characterization of the obtained N-CDs was thoroughly performed by transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) and X-ray diffraction (XRD) spectroscopy. The optical properties were also determined by absorption and fluorescence spectra. N-CDs have bright yellow fluorescence emission and high quantum yield (29 %), with a detection limit as low as 0.38 μM. In order to detect Co(II) more conveniently and quickly, N-CDs/PVA fluorescence composite film was prepared by compounding N-CDs with polyvinyl alcohol. The fluorescence composite film combines the fluorescence characteristics of N-CDs and the stability of polyvinyl alcohol. The application range of Co(II) visual detector in the water environment is expanded.

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微波法快速合成氮掺杂碳点用于水环境中co（II）的灵敏检测

以邻苯二胺和甲酰胺为原料，采用微波法制备了新型氮掺杂碳点（N-CDs），并在光致发光猝灭的基础上成功用于Co（II）的传感。利用透射电子显微镜（TEM）、傅里叶变换红外（FT-IR）和x射线衍射（XRD）对所制得的N-CDs进行了全面的结构表征。用吸收光谱和荧光光谱测定了其光学性质。N-CDs具有亮黄色荧光发射和高量子产率（29%），检测限低至0.38 μM。为了更方便、快速地检测Co(II)，将N-CDs与聚乙烯醇复配制备了N-CDs/PVA荧光复合膜。该荧光复合膜结合了N-CDs的荧光特性和聚乙烯醇的稳定性。扩大了Co（II）视觉检测仪在水环境中的应用范围。

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.