氧化改性木质素磺酸钠-石墨烯复合量子点的制备及性能  

Synthesis and Properties of Oxidative Modified Satium Lignosulfonate/ Graphene Quantum Dots Composites

作　　者：许利娜 杨小华[1] 丁海阳[1] 李梅[1] 夏建陵[1,2] XU Lina;YANG Xiaohua;DING Haiyang;LI Mei;XIA Jianling(Institute of Chemical Industry of Forest Products,CAF/National Engineering Lab.for Biomass Chemical Utilization/Key and Open Lab.of Forest Chemical Engineering,SFA/Key Lab.of Biomass Energy and Material,JiangsuProcince,Nanjing 210042,China;Jiangsu Co-Innovation Center of Efficient Processing andUtilization of Forest Resources,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]中国林业科学研究院林产化学工业研究所生物质化学利用国家工程实验室国家林业局林产化学工程重点开放性实验室江苏省生物质能源与材料重点实验室,江苏南京210042 [2]南京林业大学江苏省林业资源高效加工利用协同创新中心,江苏南京210037

出　　处：《林产化学与工业》2019年第1期29-34,共6页Chemistry and Industry of Forest Products

基　　金：中央级公益性科研院所基本科研业务费专项资金(CAFYBB2017QA016)

摘　　要：以造纸废料木质素磺酸钠和柠檬酸为原料制备了氧化改性木质素磺酸钠/石墨烯复合量子点(HSL/GQDs),利用紫外可见光谱、荧光光谱、红外光谱和透射电镜等研究了复合量子点的荧光性能、结构及其对金属离子的选择性吸附性能,并考察了复合量子点结构与吸附性能之间的关系。研究表明:HSL/GQDs的荧光强度(F_0)是单纯的石墨烯量子点的2倍多,对Fe^(3+)有较好的荧光响应信号,可用于对Fe^(3+)的检测。在10～500μmol/L范围内,加入Fe^(3+)以后的该荧光探针的荧光猝灭强度(F)与Fe^(3+)的浓度有良好的线性关系,线性方程为:F/F_0=0.851 12-0.001 11C(Fe^(3+)),线性系数为0.99。Oxidative modified sodium lignosulfonate/graphene quantum dots(HSL/GQDs)composites was synthesized using by products of the sulfite-pulping procedure(sodium lignosulfonate)and citric acid.Fluorescence spectroscopy,UV-vis spectra,and TEM were used to investigate the optical properties,structure and ions detection of the prepared HSL/GQDs.The HSL/GQDs exhibited strong fluorescence,which present two times high intensity(F 0)than that of the free GQDs.The experimental results showed that HSL/GQDs could detect Fe^3+with high sensitivity and specificity according to the change of the fluorescence intensity.The Fe^3+concentration and the fluorescent quenching intensity of prepared HSL/GQD safter adding Fe^3+presented a good linearity in range of 10-500μmol/L,with alinear equation of F/F 0=0.851 12-0.001 11 C(Fe^3+)(R 2=0.99).

关 键 词：氧化改性木质素磺酸钠 石墨烯量子点 荧光探针 FE^3+ 

分 类 号：TQ35[化学工程]