摘要
碳点作为最为新型的零维碳纳米材料,具有尺寸小(<10 nm)、优异的光学稳定性和表面易修饰等特点,因此被广泛应用于各个领域[1]。其中生物质作为来源最广泛,最廉价的碳基材料,所制备成的碳点易被引入杂原子,使其具有独特的荧光性质[2]。在本次工作中,我们利用溶热法,以樟属植物叶为碳源合成一类具有多功能的生物质碳点(BD-CDs)。在405 nm的激发下,BD-CDs在470和670 nm处具有双发射荧光。基于聚集诱导荧光增强效应(AEE),利用470 nm处的发射峰可实现铝离子的检测;根据溶剂效应,利用670 nm处的发射峰可实现水含量的检测。另外,还构建了一种基于便携式智能手机结合荧光信号对Al3+和H2O含量现场检测的平台(图1)。实验结果证明基于BD-CDs的荧光传感体系和智能手机检测平台能够达到快速,准确的检测效果,并在食品安全和环境监测方面具有很大的应用潜力。
As the newest type of zero-dimensional carbon nanomaterials,carbon dots(C-dots)perform the characteristics of small size(<10 nm),excellent optical stability and easy surface modification.Therefore,they are widely used in various fields.As the most widely sourced and cheapest carbon-based material,biomass are prepared as carbon dots with heteroatoms,giving them unique fluorescent properties.In this work,biomass dual-emission C-dots(BD-CDs)were synthesized from the leaves of Cinnamomum.Under the excitation of 405 nm,BD-CDs exhibited dual emission fluorescence at 470 and 670 nm.Due to the aggregation-induced emission enhancement(AEE)and solvent effect,the distinctive emission wavelengths of BD-CDs were capable of responding to Al3+and H2O.In addition,a platform for on-site detection of Al3+and H2O based on portable smartphone combined with fluorescent signals was established(Figure 1).The experimental results proved that the BD-CDs-based fluorescence sensor system and smartphone detection platform can achieve fast and accurate detection for Al3+and H2O,and have great application potential in food safety and environmental monitoring.
作者
张树欣
黎检
陈俗汝
陈茂婷
鲁志伟
饶含兵
ZHANG Shu-xin;LI Jian;CHEN Su-ru;CHEN Mao-ting;LU Zhi-wei;RAO Han-bing(College of Science,Sichuan Agricultural University,Sichuan,Ya’an 625014,China)
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2020年第S01期219-220,共2页
Spectroscopy and Spectral Analysis
基金
四川农业大学双向支持项目(2021993036)
国家自然科学基金项目(201905186)资助
关键词
生物质碳点
智能手机
比率荧光
目标检测物
Biomass carbon dots
Smartphone
Ratiometric fluorescence
Target detection
