硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (5): 1790-1800.DOI: 10.16552/j.cnki.issn1001-1625.2025.1054
收稿日期:2025-10-29
修订日期:2026-01-26
出版日期:2026-05-15
发布日期:2026-06-10
通信作者:
郑佳红,副教授。E-mail: jhzheng@chd.edu.cn作者简介:郭 康(2001—),男,硕士研究生。主要从事荧光传感器的研究。E-mail: 1784360960@qq.com
基金资助:Received:2025-10-29
Revised:2026-01-26
Published:2026-05-15
Online:2026-06-10
摘要:
土霉素(OTC)残留的特异性检测对食品安全和环境监测具有重要意义,快速特异性测定环境中的OTC仍然是一项挑战。本文将Cs3Bi2Br9封装在Eu金属有机框架(Eu-MOF)中,构建比率荧光传感器Cs3Bi2Br9@Eu-MOF用于OTC的检测。结果表明,采用无水乙醇作为反溶剂,在油浴温度60 ℃和pH=7的环境下制备得到的传感器性能最佳。传感研究机制表明,随着OTC浓度的增加,在0~16 μmol·L-1,由于内滤效应,Cs3Bi2Br9@Eu-MOF在424 nm处的蓝色荧光发射峰强度逐渐减弱,而由于OTC对Eu3+的敏化作用,在616 nm处出现了红色荧光发射峰,且强度逐渐增强。基于此比率信号(F616/F424),Cs3Bi2Br9@Eu-MOF比率荧光传感器对OTC表现出高灵敏度和低检测限,并具有优良选择识别能力和抗干扰能力。
中图分类号:
郑佳红, 郭康. 基于铕金属有机框架封装Cs3Bi2Br9量子点的土霉素比率荧光检测[J]. 硅酸盐通报, 2026, 45(5): 1790-1800.
ZHENG Jiahong, GUO Kang. Oxytetracycline Ratio Fluorescence Detection Based on Europium Metal-Organic Framework Encapsulated Cs3Bi2Br9 Quantum Dots[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(5): 1790-1800.
图3 Cs3Bi2Br9@Eu-MOF、Eu-MOF的吸附-脱附等温线和孔径分布曲线(插图)及Cs3Bi2Br9@Eu-MOF的FTIR谱
Fig.3 Adsorption-desorption isotherms and pore size distribution curves (inset) of Cs3Bi2Br9@Eu-MOF and Eu-MOF and FTIR spectrum of Cs3Bi2Br9@Eu-MOF
图7 Cs3Bi2Br9@Eu-MOF、Cs3Bi2Br9和Eu-MOF对不同浓度OTC的荧光响应图谱及线性关系
Fig.7 Fluorescence response spectra and linear relationship of Cs3Bi2Br9@Eu-MOF, Cs3Bi2Br9 and Eu-MOF to different concentrations of OTC
| Sensing probe | Detection range/(μmol·L-1) | Limit of detection/(μmol·L-1) | Ref |
|---|---|---|---|
| COF-TD@Eu3+ | 5~40 | 0.79 | [ |
| Cs3Bi2Br9 | 2~18 | 0.432 | [34] |
| CuInS2/ZnS | 0~50 | 0.46 | [35] |
| Cs3Bi2Br9@Eu-MOF | 2~16 | 0.254 | This work |
表1 不同OTC检测方法的比较
Table 1 Comparison of different OTC detection methods
| Sensing probe | Detection range/(μmol·L-1) | Limit of detection/(μmol·L-1) | Ref |
|---|---|---|---|
| COF-TD@Eu3+ | 5~40 | 0.79 | [ |
| Cs3Bi2Br9 | 2~18 | 0.432 | [34] |
| CuInS2/ZnS | 0~50 | 0.46 | [35] |
| Cs3Bi2Br9@Eu-MOF | 2~16 | 0.254 | This work |
图9 样品的激发光谱、紫外-可见吸收光谱及含OTC和不含OTC的Cs3Bi2Br9@Eu-MOF的荧光寿命图
Fig.9 Excitation spectra and UV-vis absorption spectra of samples and fluorescence lifetime plots of Cs3Bi2Br9@Eu-MOF with and without OTC
| Sample | Spkied water concentraion/(μmol·L-1) | OTC detection concentration/(μmol·L-1) | Recovery/% |
|---|---|---|---|
| 1 | 5 | 5.06 | 101.20 |
| 2 | 10 | 10.09 | 100.94 |
| 3 | 15 | 14.62 | 97.46 |
表2 加标水样中的OTC 检出率
Table 2 OTC detection rate in spiked water samples
| Sample | Spkied water concentraion/(μmol·L-1) | OTC detection concentration/(μmol·L-1) | Recovery/% |
|---|---|---|---|
| 1 | 5 | 5.06 | 101.20 |
| 2 | 10 | 10.09 | 100.94 |
| 3 | 15 | 14.62 | 97.46 |
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