In:
Environmental Science: Nano, Royal Society of Chemistry (RSC), Vol. 10, No. 2 ( 2023), p. 539-551
Abstract:
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 –CC–H and CO 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, 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.
Type of Medium:
Online Resource
ISSN:
2051-8153
,
2051-8161
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2758235-8
Permalink