新型碳量子点荧光探针的制备及其对Mn2+的选择性检测
Preparation of a Novel Carbon Quantum Dot Photoluminescent Probe and Its Selective Detection of Mn2+
邓祥 1黄小梅 2邓子禾 3李敏 4龚安界 2黄涛2
作者信息
- 1. 四川文理学院化学化工学院,四川 达州 635002;乡村低成本环境治理技术四川省高校重点实验室,四川 达州 635002
- 2. 四川文理学院化学化工学院,四川 达州 635002
- 3. 石河子大学化学化工学院,新疆 石河子 832003
- 4. 达州中医药职业学院,四川 达州 635000
- 折叠
摘要
以中药材厚朴为碳源,采用水热法制备得到荧光碳量子点(CQDs),并构建了Mn2+荧光探针.碳量子点表现出良好的荧光性能,最大激发波长为285 nm,最大发射波长为425 nm,荧光量子产率为28.4%.Mn2+荧光探针具有良好的选择性、优异的抗干扰能力和较高的灵敏度,在Mn2+浓度为0.2～800 μmol/L范围内,(I0-I)/I与Mn2+浓度呈现出良好的线性关系,相关系数为0.9996,检测限为52 nmol/L.通过添加5 μmol/L、50 μmol/L和100 μmol/L的Mn2+来检测真实水样中的Mn2+,相对标准偏差为0.9%～2.9%,回收率为98.8%～101.5%,该新型碳量子点荧光探针在Mn2+的环境分析中具有广阔的应用前景.
Abstract
A photoluminescent probe for Mn2+detection was constructed using photoluminescent carbon quantum dots(CQDs)obtained from the traditional Chinese medicinal material Magnolia officinalis as the carbon source via a one-step hydrothermal method.These CQDs exhibit excellent photoluminescence performance,including a maximum excitation wavelength of 285 nm,maximum emission wavelength of 425 nm,and a photoluminescent quantum yield of 28.4%.The Mn2+photoluminescent probe shows exceptional selectivity,excellent anti-interference ability,and high sensitivity.Over the Mn2+concentration range of 0.2‒800 μmol/L,a linear correlation exists between(I0-I)/I and Mn2+concentration,with a correlation coefficient of 0.9996 and a low limit of detection at 52 nmol/L.Mn2+in real water samples was detected by adding 5,50,and 100 μmol/L Mn2+to the samples.The relative standard deviations were 0.9%‒2.9%,and the recoveries were 98.8%‒101.5%.This novel CQDs photoluminescent probe has broad application prospects in the environmental analysis of Mn2+.
关键词
锰离子/碳量子点/荧光猝灭/中药材厚朴Key words
Mn2+/carbon quantum dots/photoluminescent quenching/Chinese medicinal material Magnolia officinalis引用本文复制引用
基金项目
四川省科技厅应用基础研究项目(2019YJ0307)
乡村低成本环境治理技术四川省高校重点实验室项目(XCH2022ZB-05)
省级大学创新创业训练计划项目(202310644034)
达州市科技局应用基础研究项目(21YYJC0005)
出版年
2024
NETL
NSTL
万方数据