One-step green synthesis of in-situ functionalized carbon quantum dots from Tagetes patula flowers: Applications as a fluorescent probe for detecting Fe3+ ions and as an antifungal agent

被引：15

作者：

Patra, Santosini ^{[1
]}

Singh, Manasi ^{[2
]}

Subudhi, Subhasri ^{[1
]}

Mandal, Manoranjan ^{[1
]}

Nayak, Alok Kumar ^{[1
]}

Sahu, Binod Bihari ^{[2
]}

Mahanandia, Pitamber ^{[1
]}

机构：

[1] Natl Inst Technol Rourkela, Dept Phys & Astron, Rourkela 769008, Odisha, India

[2] Natl Inst Technol Rourkela, Dept Life Sci, Rourkela 769008, Odisha, India

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2023年 / 442卷

关键词：

Carbon quantum dots; Quantum yield; Fluorescent probe; Tagetes patula flowers; Green synthesis; ONE-POT SYNTHESIS; SELECTIVE DETECTION; SENSITIVE DETECTION; FACILE SYNTHESIS; SENSING PLATFORM; GRAPHENE OXIDE; NITROGEN; NANODOTS; NANOPARTICLES; EMISSION;

D O I：

10.1016/j.jphotochem.2023.114779

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this research, for the first time, fluorescent carbon quantum dots (CQDs) synthesized by using a green, simple, and efficient one-step hydrothermal carbonization technique from Tagetes patula flowers as carbon precursors without using any toxic chemicals are reported. The as-prepared CQDs have been characterized by Transmission electron microscope (TEM), Field emission scanning electron microscopy with Energy dispersive X-ray spectroscopy (FESEM-EDX), UV-Visible spectroscopy, Raman spectroscopy, X-ray Diffraction (XRD), zeta potential analysis, Fourier-transform infrared spectroscopy (FTIR), fluorescence spectroscopy, and X-ray photoelectron spectroscopy (XPS). As analyzed by TEM and XRD analysis, it is observed that the as-synthesized CQDs are spherical having an average particle diameter of about 5.15 nm. The quantum yield (QY) of the CQDs was calculated and found to be 29.88%. The as-synthesized CQDs show an excellent fluorescence quenching behavior towards Fe3+ ions as compared to other metal ions. Therefore, CQDs were used as a sensing probe for detecting Fe3+ ions in a linear range of 0-4 & mu;M and a limit of detection (LOD) of 0.32 & mu;M. A comprehensive study has been conducted to show the effectiveness of the CQDs on the growth of rice plants (Oryza sativa) and the antifungal activities of CQDs on the mycelial growth of Magnaporthe oryzae (a plant pathogenic fungus).

引用

页数：13