Construction of dual-channel ratio sensing platform and molecular logic gate for visual detection of oxytetracycline based on biomass carbon dots prepared from cherry tomatoes stalk

被引：43

作者：

Arkin, Kamile ^{[1
]}

Zheng, Yuxin ^{[1
]}

Bei, Yuyang ^{[1
]}

Ma, Xuesong ^{[1
]}

Che, Weilong ^{[2
]}

Shang, Qingkun ^{[1
]}

机构：

[1] Northeast Normal Univ, Fac Chem, Changchun 130024, Peoples R China

[2] Yancheng Inst Technol, Fac Chem & Chem Engn, Yancheng 224051, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2023年 / 464卷

基金：

中国国家自然科学基金;

关键词：

Biomass carbon dots; Ratio fluorescent probe; Dual-channel ratio sensing platform; Molecular logic gate; Antibiotic; Visual identification and detection; GREEN SYNTHESIS; MECHANISM;

D O I：

10.1016/j.cej.2023.142552

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this work, blue carbon dots (Stalk-Trp CDs) with high fluorescence quantum yield were successfully prepared from biological waste cherry tomato stalk and tryptophan. The morphology, composition, and properties of Stalk-Trp CDs were characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, infrared spectroscopy, ultraviolet-visible absorption spectroscopy, and fluorescence spectroscopy. On this basis, a dual-channel ratio sensing platform (Stalk-Trp CDs@Eu) was constructed using the interaction of Stalk-Trp CDs with Eu3+, which reduced the detection limit of the antibiotic oxytetracycline from 0.15 & mu;mol/L to 0.018 & mu;mol/L. Channel 1 of the dual-channel ratio sensing platform is a neutral environment (pH = 6.5), and the specific response of the probe to OTC causes its fluorescence to change from blue to purple. Channel 2 is an alkaline environment (pH = 11.5), and the fluorescence of the probe turns green only in the presence of OTC. The interaction mechanism of the dual-channel ratio sensing platform with the antibiotics oxytetracycline (OTC), chlortetracycline (CTC), and tetracycline (TC) was also revealed. The detection results of OTC in honey and milk by using Stalk-Trp CDs@Eu were highly consistent with the HPLC method recommended by the national standard. This shows that the dual-channel ratio sensing platform has great practical application value in the field of antibiotic detection.

引用

页数：12

共 41 条

[1] Leftover Kiwi Fruit Peel-Derived Carbon Dots as a Highly Selective Fluorescent Sensor for Detection of Ferric Ion [J].