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

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 (...

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Veröffentlicht in:Environmental science. Nano 2023-02, Vol.1 (2), p.539-551
Hauptverfasser: Pan, Xiaoqin, Fu, Fangmei, Xie, Zhenxi, Li, Wei, Yang, Xian, Kang, Yunyan, Qu, Songnan, Zheng, Yinjian, Li, Qingming, Zhang, Haoran, Song, Shiwei, Lei, Bingfu
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container_end_page 551
container_issue 2
container_start_page 539
container_title Environmental science. Nano
container_volume 1
creator Pan, Xiaoqin
Fu, Fangmei
Xie, Zhenxi
Li, Wei
Yang, Xian
Kang, Yunyan
Qu, Songnan
Zheng, Yinjian
Li, Qingming
Zhang, Haoran
Song, Shiwei
Lei, Bingfu
description 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&z.dbd;C-H and C&z.dbd;O groups on the CD surfaces are major sites for oxidative degradation of the CDs. The pyridine N is responsible for photoproduction of &z.rad;OH and &z.rad;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, CO 2 , NH 4 + , and H 2 O 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 CO 2 fixation in the C 4 cycle and carbon assimilation in the C 3 cycle. Degradable fluorescent N-doped CDs are oxidized and degraded into substances that can be used for lettuce growth. Their excellent light conversion characteristics promote the utilization of the CD degradation products by lettuce.
doi_str_mv 10.1039/d2en00574c
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source Royal Society Of Chemistry Journals 2008-
subjects Analytical methods
Carbon
Carbon cycle
Carbon dioxide
Carbon dioxide fixation
Carbon dots
Carbon fixation
Carboxylic acids
Chromatography
Degradation
Degradation products
Fluorescence
Fourier transforms
Functional groups
Gene expression
Infrared analysis
Infrared spectroscopy
Ions
Light effects
Liquid chromatography
Mass spectrometry
Mass spectroscopy
Nutrition
Photoelectron spectroscopy
Photoelectrons
Photoproduction
Photosynthesis
Pyridines
Quantum dots
Spraying
X ray photoelectron spectroscopy
title Light-nutrition coupling effect of degradable fluorescent carbon dots on lettuce
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