数字农科院2.0

Light-nutrition coupling effect of degradable fluorescent carbon dots on lettuce

文献类型： 外文期刊

作者： Pan, Xiaoqin;Fu, Fangmei;Xie, Zhenxi;Li, Wei;Yang, Xian;Kang, Yunyan;Qu, Songnan;Zheng, Yinjian;Li, Qingming;Zhang, Haoran;Song, Shiwei;Lei, Bingfu

作者机构：

期刊名称： ENVIRONMENTAL SCIENCE-NANO

ISSN： 2051-8153

年卷期： 2023 年 2 期

页码：

收录情况： SCIE（2023版） ; ; EI（2023版）

摘要： The increasing application of carbon dots (CDs) inevitably leads to environmental leakage. To be environmentally friendly, degradable CDs will become a mainstream agricultural application in the future. We prepared three CDs with different functional groups. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis showed that -C equivalent to C-H and C equivalent to O groups on the CD surfaces are major sites for oxidative degradation of the CDs. The pyridine N is responsible for photoproduction of OH and O-.(2)-, which will self-induce degradation. By liquid chromatography-mass spectrometry (LC-MS) method, the routes for N-doped CDs degrading into carboxylic acid compounds, CO2, NH4+, and H2O are clearly illustrated. After spraying fluorescent CDs on lettuce leaves, only the group of lettuce that combined the light conversion function of N3-CDs and the final degradation products of N3-CDs exhibited a significant enhancement of the net photosynthesis rate by 1.13 times, acceleration of the ETR by 1.19 times, and improved expression of genes related to CO2 fixation in the C-4 cycle and carbon assimilation in the C-3 cycle.

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