Functionalization of cellulose carbon dots with different elements(N,B and S)for mercury ion detection and anti-counterfeit applications

扫码查看

原文链接

万方数据
维普

外文摘要：Mercury ion(Hg2+),as one of the most toxic heavy metal ions,accumulates easily in the environment,which can generate potential hazards to the ecosystem and human health.To effectively detect and re-move Hg2+,we fabricated four types of carbon dots(CDs)using carboxymethyl nanocellulose as a carbon source doped with different elements using a hydrothermal method.All the CDs exhibited a strong fluo-rescence emission,excitation-dependent emission and possessed good water dispersibility.Moreover,the four fluorescent CDs were used for Hg2+recognition in aqueous solution,where the CDs-N exhibited better sensitivity and selectivity for Hg2+detection,with a low limit of detection of 8.29×10-6 mol/L.It was determined that the fluorescence quenching could be ascribed to a photoinduced charge-transfer processes between Hg2+and the CDs.In addition,the CDs-N were used as a smart invisible ink for anti-counterfeiting,information encryption and decryption.Furthermore,the CDs-N were immersed into a cellulose(CMC)-based hydrogel network to prepare fluorescent hydrogels capable of simultaneously de-tecting and adsorbing Hg2+.We anticipate that this research will open possibilities for a green method to synthesize fluorescent CDs for metal ion detection and fluorescent ink production.

外文关键词：

Carbon dotsFunctional groupsHg2+detectionMechanismAnti-counterfeiting

作者：

Xiaoning Li、Quanyu Shi、Meng Li、Ningxin Song、Yumeng Xiao、Huining Xiao、Tony D.James、Lei Feng

展开 >

作者单位：

Second Affiliated Hospital of Dalian Medical University,Dalian 116023,China

Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control,Department of Environmental Science and Engineering,North China Electric Power University,Baoding 071003,China

Department of Chemical Engineering and Limerick Pulp&Paper Centre,University of New Brunswick,15 Dineen Drive,Fredericton NB E3B 5A3,Canada

Department of Chemistry,University of Bath,Bath BA2 7AY,United Kingdom

School of Chemistry and Chemical Engineering,Henan Normal University,Xinxiang 453007,China

展开 >

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central UniversitiesOpen Research Fund of the School of Chemistry and Chemical Engineering,Henan Normal University for supportOpen Research Fund of the School of Chemistry and Chemical Engineering,Henan Normal University for supportRoyal Society for a Wolfson Research Merit Award

项目编号：

52370110216070442023MS1462020ZD012021YB07

出版年：

2024

DOI：

10.1016/j.cclet.2023.109021

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(7)