赵瑀杨,赵东洋,姚娜,丁海阳,李梅,李守海,许利娜

• 1:中国林业科学研究院林产化学工业研究所
• 2:江苏省生物质能源与材料重点实验室
• 3:国家林业和草原局林产化学工程重点实验室
• 4:林木生物质低碳高效利用国家工程研究中心

摘要(Abstract)：

木质素作为具有巨大应用前景的生物质资源,提高木质素的利用率和挖掘木质素的潜在价值持续吸引着业界的关注与探索。传统木质素修饰的荧光碳点检测金属离子,检测结果具有“不可预测性”,这一特性对此类碳量子点的开发与应用造成一定程度的限制。离子印迹技术凭借其特异性离子识别机制,可使碳点“专一性”和“特异性”识别金属离子功能得到加强,为碳点检测金属离子领域提供新的研究思路。文中首先进行木质素的胺化改性,随后采用柠檬酸热解法制备出以Co~(2+)为模板离子的离子印迹改性木质素/石墨烯复合量子点(IIT/GQDs)。利用荧光光谱仪测得IIT/GQDs的最大激发波长和发射波长分别为318 nm和425 nm,利用透射电镜测得复合量子点的粒径平均分布在0.5～5 nm且呈准零维球形,以乙二胺四乙酸(EDTA)洗脱Co~(2+)后,可作为检测Co~(2+)的荧光探针,在10～500μmol·L~(-1)内,荧光强度(F_0/F)与Co~(2+)浓度呈线性关系,Stern-volmer线性回归方程可以表示为F_0/F=1.06+(3.18×10~(-4))C(Co~(2+)),相关性系数R2为0.98。此外,IIT/GQDs可以用于实际水样中的Co~(2+)检测,研究结论为碳点在环境监测领域提供了新的思路。

关键词(KeyWords)： 离子印迹;木质素磺酸钠;石墨烯复合量子点;Co~(2+);荧光探针

Abstract:

Keywords:

基金项目(Foundation): 中国林业科学研究院中央级公益性科研院所基本科研业务费专项资助（CAFYBB2021QB005）;; 国家自然科学基金（32001284）

作者(Author): 赵瑀杨,赵东洋,姚娜,丁海阳,李梅,李守海,许利娜

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