双氮源共掺杂木素碳量子点/有机溶剂水份探针的构建及性能  

Construction and Performance of Dual-nitrogen Source Co-doped Lignin Carbon Quantum Dots/Organic Solvent Moisture Probes

作　　者：刘凯 张培培 胡妙言 高诗雨 连海兰 徐长妍 LIU Kai;ZHANG Peipei;HU Miaoyan;GAO Shiyu;LIAN Hailan;XU Changyan(College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]南京林业大学材料科学与工程学院,南京210037

出　　处：《光子学报》2024年第9期116-129,共14页Acta Photonica Sinica

基　　金：国家自然科学基金(No.32071703)。

摘　　要：以木素为碳源,以盐酸为解聚剂,以邻苯二胺和尿素为氮掺杂剂,通过一锅水热法获得了碳量子点。该碳量子点的荧光量子产率为2.05%,其水溶液在紫外区具有明显的吸收,并表现出较强的溶剂依赖性。将其用于检测实验室常用的三种有机溶剂(乙醇、N,N-二甲基甲酰胺和四氢呋喃)时,随着有机溶剂中水份含量的增加,发射光谱出现红移,且其荧光强度下降。在所构建的双氮源共掺杂木素碳量子点/有机溶剂水份荧光探针中,碳量子点的荧光强度与有机溶剂的水份含量存在良好的线性关系,对乙醇、N,N-二甲基甲酰胺和四氢呋喃中水份的检出下限分别为0.079%、0.075%和0.080%,并实现了可视化的水份检测。该研究结果可为有机溶剂中微量水份的检测提供理论和实验参考。Water is an essential substance in daily life,however,the presence of water in organic solvents is often considered a safety hazard in industrial production and chemical experiments.In chemical experiments,the moisture in organic solvents can affect product properties,reduce chemical reaction rates,and even alter reaction processes.Therefore,the determination of water content in organic solvents is of great practical significance.The Karl Fischer titration method,as a classic method,is widely used for the determination of water in organic solvents;however,this method has defects such as high reagent toxicity,complex operation,and inability to achieve real-time monitoring.Both gas chromatography and nuclear magnetic resonance can be used to detect water in organic solvents,with the advantages of fast detection speed,wide application range,and high detection sensitivity.However,there are also problems such as expensive instruments,long time consumption,and the need for professional personnel to operate.In recent years,some have proposed using fluorescent probes for the detection of water in organic solvents.However,the current synthesis process of fluorescent substances is complex and costly,which is not conducive to large-scale applications.Carbon Quantum Dots(CQDs),as a new type of fluorescent nanomaterial,have good optical stability,low toxicity,simple synthesis process,low cost,and are easy to functionalize.Therefore,they have received increasing attention in organic solvent water detection.At present,CQDs synthesized using chemical small molecules as carbon sources have potential applications in organic solvent moisture detection.However,compared with biomass materials,chemical small molecules are more expensive and require the use of strong acids such as HNO_(3) and H_(2)SO_(4) during the transition to CQDs.The resulting CQDs have potential toxicity,poor environmental friendliness,and are not conducive to large-scale applications.In addition,most reported CQDs/organic solvent fluorescent probes can only detec

关 键 词：木质素碳量子点 氮掺杂 荧光探针 可视化 有机溶剂水份检测 

分 类 号：O433.4[机械工程—光学工程]