比率荧光碳点对部分水解聚丙烯酰胺精准识别与降解

打开文本图片集

关键词：比率荧光碳点；部分水解聚丙烯酰胺；特异性识别；光催化降解中图分类号：0482.31 文献标识码：ADOI： 10.37188/CJL.20240311 CSTR：32170.14.CJL.20240311

RatiometricFluorescentCarbonDotsforDetectionand Degradationof PartiallyHydrolyzed Polyacrylamide

SHI Weiguang1*，SUN Xiaojing'，SHAO Danyang²，LI Changsheng'，DONG Biao²*

（1.StateKeyLaboratoryofContinental ShaleOil，CollegeofChemistry&Chemical Engineering， Northeast Petroleum University，Daqing163318，China；

2.StateKeyLaboratory of Integrated Optoelectronics，Collegeof Electronic Scienceand Engineering， JilinUniversity，Changchun130012，China） （2 CorrespondingAuthors，E-mail：sswwgg20o3@126.com；dongb@jlu.edu.cn

Abstract：Copper-doped carbon dots（Cu-CDs）werefabricated through bottom-up hydrothermal method based on L-tryptophan，folicacid and copper chloride.Characterization of the carbon dots’structure，HPAMrecognition mechanism，and degradation performance wereconducted usingtransmision electron microscopy，X-ray photoelectronspectroscopy，and steady-state transientfluorescence spectroscopy.Asaresult，Cu-CDs exhibitedahigh quantumyieldof 60 % ，proving capable of anti-ion interferenceand specific recognition of partially hydrolyzed polyacrylamide（HPAM） in water. The fluorescence intensity ratio（ ）of Cu-CDs displayed a strong linear correlation with HPAM concentration from 1 m g / L to 1 0 0 0 m g / L ，witharemarkabledetection limitof 0 . 2 7 m g / L .ThedegradationofHPAMachievedarateof 78 % within2 hours under 365 nmultraviolet irradiation，showcasing the efficacy of Cu-CDs.Even after5 cycles，Cu-CDs retained their high degradation eficiency（ 67 % ），underscoring their exceptionalphotocatalytic stability.Thisstudypresentsapracticalapproachforthe precisedetectionand degradationof HPAM，offering promise for the effective treatment of pollutants.

KeyWords：ratiometric fluorescent carbon dots；HPAM；specific recognition；photocatalytic degradation

1引言

部分水解聚丙烯酰胺（HPAM）作为一种线型水溶性高分子化合物，不仅在污水处理方面得到广泛应用，还在油田聚合物驱油提高采收率中发挥至关重要的作用2。（剩余11164字）