摘要
以生物质甘蔗渣为碳源、磷酸氢二铵为N源和P源,经一步水热法制备了原位N、P共掺杂甘蔗渣基碳量子点(N/P-CDs)。以N/P-CDs的相对荧光强度为指标,采用单因素实验得到N/P-CDs的最佳制备条件,通过荧光分光光度计、XRD、UV-Vis、FTIR、AFM和瞬态/稳态荧光光谱仪表征了N/P-CDs的形貌结构和荧光性质,并将其应用于水溶液中Fe^(3+)[Fe(Ⅲ)]的检测。结果表明,在m(磷酸氢二铵)/m(甘蔗渣)=0.8、反应温度260℃、反应时间12 h、投料量(磷酸氢二铵和甘蔗渣总质量,下同)2.16 g的条件下,制备的N/P-CDs相对荧光强度最高;N/P-CDs粒子高度主要分布在0.2~0.7 nm,宽度约为9.7 nm;N/P-CDs的绝对量子产率达14.6%,平均荧光寿命约为12.02 ns;N/P-CDs表现出良好的荧光性能,在波长365 nm紫外灯照射下呈现蓝色荧光,其最大激发波长为330 nm,发射波长为407 nm,N/P-CDs在Fe^(3+)存在时表现出较强的特异性荧光猝灭效果,可用于水溶液中Fe^(3+)的选择性检测。
In situ N and P co-doped carbon quantum dots (N/P-CDs) were prepared by a one-step hydrothermal method using biomass sugarcane bagasse as carbon source and diammonium dihydrogen phosphate as N and P sources.The optimal preparation conditions for N/P-CDs were obtained through single factor experiments with the relative fluorescence intensity of N/P-CDs as an indicator.The N/P-CDs were characterized by fluorescence spectrophotometer,XRD,UV-Vis,FTIR,AFM,and transient/steadystate fluorescence spectrometer for analyses on morphology,structure and fluorescence properties,and then applied for aqueous Fe^(3+)[Fe(Ⅲ)]detection.The results showed that,under the conditions of m(diammonium dihydrogen phosphate)/m(sugarcane bagasse)=0.8,reaction temperature 260℃,reaction time 12 h,and feed amount (total mass of diammonium dihydrogen phosphate and sugarcane bagasse,the same below)2.16 g,the N/P-CDs obtained exhibited the highest relative fluorescence intensity,with the particle height mainly distributed between 0.2~0.7 nm,width approximately 9.7 nm,the absolute quantum yield reaching14.6%,and the average fluorescence lifetime about 12.02 ns.The N/P-CDs displayed excellent fluorescence performance,exhibiting blue fluorescence under UV irradiation at a wavelength of 365 nm,with maximum excitation wavelength of 330 nm and emission wavelength of 407 nm.The N/P-CDs displayed strong specific fluorescence quenching effect in the presence of Fe^(3+),indicating selective aqueous Fe^(3+)detection.
作者
靳玉辉
张东辉
李媚
林国友
孙守祥
孙国梁
方燕
JIN Yuhui;ZHANG Donghui;LI Mei;LIN Guoyou;SUN Shouxiang;SUN Guoliang;FANG Yan(Guangxi Key Laboratory for Polysaccharide Materials and Modifications,School of Chemistry and Chemical Engineering,Guangxi Minzu University,Nanning 530008,Guangxi,China;Key Laboratory of Chemical and Biological Transformation Process of Guangxi Higher Education Institutes,Nanning 530008,Guangxi,China;Guangxi Institute of Science and Technology Information,Nanning 530022,Guangxi,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2024年第12期2616-2621,2644,共7页
Fine Chemicals
基金
广西科技基地和人才资助项目(桂科AD20238036)
广西重点研发计划项目(桂科AB1850036)
广西生物多糖分离纯化及改性研究平台建设项目(桂科ZY18076005)
广西研究生教育创新计划项目(YCSW2021155)。
关键词
碳量子点
甘蔗渣
掺杂
离子检测
生物质
功能材料
carbon quantum dots
bagasse
doping
ion detection
biomass
functional materials
