1 School of Chemical Engineering, Northeast Electric Power University, Jilin 132012, Jilin, China 2 Ningbo Institute of Materials Technology& Engineering, Ningbo 315201, Zhejiang, China 3 School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin 132012, Jilin,China
Abstract: Using melamine as a nitrogen source, carbon quantum dots (CQDs) were doped with nitrogen. Nitrogen doped lignin-based carbon quantum dots (N-CQDs) were prepared through a one-step hydrothermal method. Doping nitrogen formed conjugation systems, introduced amino groups, thus improved the fluorescence intensity. Characterization and test of N-CQDs were performed. The average particle size of N-CQDs was 2.7 nm. N-CQDs were composed of many functional groups, including amino, hydroxyl, carboxyl, ether bonds, single bonds between carbon and nitrogen, double bonds between carbon and nitrogen, and benzene ring structures. The optimum excitation and emission wavelength were 400 nm and 500 nm respectively. In the UV-Vis absorption spectra, the absorption peak at 260 nm was due to π-π* leaps of C=O bond in enzymatic hydrolysis lignin and benzene ring, π-π* leaps of C=N bond in melamine. The absorption peak at 315 nm was due to n-π* leaps of C=O bond in enzymatic hydrolysis lignin or benzene ring, n-π* leaps of C-N bond and C=N bond in melamine. N-CQDs were applied to anion detection, having a sudden inactivation effect on hypochlorite ion (ClO-). N-CQDs had specific detection for ClO- and the detection limits were 1.21 μmol/L. N-CQDs could enter live cells successfully and N-CQDs, is harmless to cells, and bright green fluorescence in the cytoplasm of cells could be observed. Based on the good detection for ClO-, fluorescence effect and harmlessness to cells, N-CQDs have some potential applications in the ion detection and medical field.
通讯作者:
* 陈景,中国科学院宁波材料技术与工程研究所研究员、博士研究生导师。2008年于东南大学材料物理与化学专业取得博士学位,2010年到中科院宁波材料所工作至今。主要从事生物基聚氨酯弹性体及发泡材料的设计合成、改性应用等研究工作。已在Chemical Engineering Journal、Science of the Total Enviroment、Separation and Purification Technology、ACS Sustainable Chemistry & Engineering、ChemSusChem等期刊上发表80余篇学术论文,他引2 300多次,H=28。申请国家发明专利20项,授权15项。 chenjing@nimte.ac.cn
1 Zhao Y Y, Fan J Y, Wei J, et al. Materials reports, 2023, 37(5), 21060126 (in Chinese). 赵艳艳, 范敬煜, 魏景, 等. 材料导报, 2023, 37(5), 21060126. 2 Cao A, Sang L, Yu Z, et al. Catalysis Science & Technology, 2022, 12(6), 1859. 3 Abbas A, Abbas S, Tabish T A, et al. Journal of Environmental Chemical Engineering, 2021, 9(5), 106154. 4 Liu Q H, He Y F, Lang L N, et al. Chemical Industry and Engineering Progress, 2018, 37(10), 3936 (in Chinese). 刘清浩, 何艳飞, 梁丽娜, 等. 化工进展, 2018, 37(10), 3936. 5 Chuaicham C, Sekar K, Balakumae V, et al. Environmental Research, 2022, 212, 113635. 6 Singh H, Singh S, Bhardwaf S K, et al. Food Chemistry, 2022, 393, 133374. 7 Guo Y, Wang R, Wei C, et al. Food Chemistry, 2023, 415, 135749. 8 Hsieh C T, Sung P Y, Gandomi Y A, et al. Chemosphere, 2023, 318, 137926. 9 Mozdbar A, Nouralishahi A, Fatemi S, et al. Journal of Water Process Engineering, 2023, 51, 103465. 10 Zhao F, Li X, Zuo M, et al. Journal of Environmental Chemical Engineering, 2023, 11(2), 109487. 11 Latief U, Islam S U, Khan M S. Journal of Alloys and Compounds, 2023, 941, 168985. 12 Zhang S, Tian Y, Liu M, et al. Materials Chemistry Frontiers, 2022, 6(7), 973. 13 Chen J, Wu J, Zhong Y, et al. Separation and Purification Technology, 2023, 311, 123284. 14 Wu J, Ma X, Gnanasekar P, et al. Science of the Total Environment, 2023, 860, 160276. 15 Ju J, Chen W. Biosensors and Bioelectronics, 2014, 58, 219. 16 Shen D, Long Y, Wang J, et al. Nanoscale, 2019, 11(13), 5998. 17 Qiang S, Zhang L, Li Z, et al. Antioxidants, 2022, 11(12), 2475. 18 Zhong H, Wu Y X, Yu S, et al. Analytical Chemistry, 2021, 93(14), 5691. 19 Zhou W, Liu C, Fan J, et al. Journal of Alloys and Compounds, 2022, 920, 165963. 20 Zhu S, Zhang Q, Pan Q, et al. Applied Surface Science, 2022, 584, 152567. 21 Zhu L, Shen D, Wang Q, et al. ACS Applied Materials & Interfaces, 2021, 13(47), 56465. 22 Zhu L, Shen D, Hong L. Journal of Colloid and Interface Science, 2022, 617, 557. 23 Gorne A L, Sholz T, Kobertz D, et al. Inorganic Chemistry, 2021, 60(20), 15069. 24 Hashemi F, Heidari F, Mohajeri N, et al. Photochemistry and Photobio-logy, 2020, 96(5), 1032. 25 Ghafarloo A, Sabzi R E, Samadi N, et al. Journal of Photochemistry and Photobiology A: Chemistry, 2020, 388, 112197. 26 Wang C, Hu T, Wen Z, et al. Journal of Colloid and Interface Science, 2018, 521, 33. 27 Yang J, Jin X, Cheng Z, et al. ACS Sustainable Chemistry & Engineering, 2021, 9(39), 13206. 28 Jiang Q, Jing Y, Ni Y, et al. Microchemical Journal, 2020, 157, 105111.