比率荧光碳点对部分水解聚丙烯酰胺精准识别与降解  

Ratiometric Fluorescent Carbon Dots for Detection and Degradation of Partially Hydrolyzed Polyacrylamide

作　　者：施伟光[1] 孙晓静 邵丹阳 李昌升 董彪[2] SHI Weiguang;SUN Xiaojing;SHAO Danyang;LI Changsheng;DONG Biao(State Key Laboratory of Continental Shale Oil,College of Chemistry&Chemical Engineering,Northeast Petroleum University,Daqing 163318,China;State Key Laboratory of Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,Changchun 130012,China)

机构地区：[1]东北石油大学化学化工学院多资源协同陆相页岩油绿色开采全国重点实验室,黑龙江大庆163318 [2]吉林大学电子科学与工程学院集成光电子全国重点实验室,吉林长春130012

出　　处：《发光学报》2025年第3期545-552,共8页Chinese Journal of Luminescence

基　　金：黑龙江省省属本科高校优秀青年教师基础研究支持计划重点项目(YQJH_(2)024036);吉林省卫生厅项目(ZYXWST2021061)。

摘　　要：以L-色氨酸、叶酸和氯化铜为原料,采用自下而上的方法水热合成了特异性识别部分水解聚丙烯酰胺(HPAM)的铜掺杂碳点(Cu-CDs)。采用透射电子显微镜、X射线光电子能谱和稳态瞬态荧光光谱等表征方法对碳点结构、HPAM识别机制与降解性能进行了研究。结果表明,Cu-CDs的荧光量子产率为60%,具有抗离子干扰特性,特异性识别水中的HPAM。在1~1000 mg/L范围内,Cu-CDs的比率荧光强度(I_(360)/I_(450))和HPAM浓度呈现良好的线性关系,最低检测限为0.27 mg/L。经365 nm紫外光照射2 h,Cu-CDs催化HPAM的降解率为78%,而且经过5个降解循环后,仍保持较高的降解率(67%),展现出优异的光催化稳定性。本研究为精准识别与降解HPAM、实现高效的污染物处理提供了一种可行策略。Copper-doped carbon dots(Cu-CDs)were fabricated through bottom-up hydrothermal method based on L-tryptophan,folic acid and copper chloride.Characterization of the carbon dots’structure,HPAM recognition mechanism,and degradation performance were conducted using transmission electron microscopy,X-ray photoelec-tron spectroscopy,and steady-state transient fluorescence spectroscopy.As a result,Cu-CDs exhibited a high quan-tum yield of 60%,proving capable of anti-ion interference and specific recognition of partially hydrolyzed polyacryl-amide(HPAM)in water.The fluorescence intensity ratio(I_(360)/I_(450))of Cu-CDs displayed a strong linear correlation with HPAM concentration from 1 mg/L to 1000 mg/L,with a remarkable detection limit of 0.27 mg/L.The degrada-tion of HPAM achieved a rate of 78%within 2 hours under 365 nm ultraviolet irradiation,showcasing the efficacy of Cu-CDs.Even after 5 cycles,Cu-CDs retained their high degradation efficiency(67%),underscoring their excep-tional photocatalytic stability.This study presents a practical approach for the precise detection and degradation of HPAM,offering promise for the effective treatment of pollutants.

关 键 词：比率荧光碳点 部分水解聚丙烯酰胺 特异性识别 光催化降解 

分 类 号：O482.31[理学—固体物理]