基于锌掺杂碳点比色传感器的构建及其在硫脲可视化检测中的应用

打开文本图片集

关键词：碳点；锌掺杂；光催化；比色传感；硫脲检测中图分类号：0482.31；0657.3 文献标识码：DOI：10.37188/CJL.20250245 CSTR：32170.14.CJL.20250245

Zn-dopedCarbonDots-basedColorimetricSensorfor VisualDetectionofThiourea

ZHU Yunxiao，NAN Xinru，HUANG Yue，YANG Xiaoqing，HUANG Qitong*， FANGXiaojun*，LINXiaofeng*

（Schoolof Medical Information Engineering，SchoolofPharmacy，Research Center，Key Laboratoryof Biomedical Sensors ofGanzhou，Gannan Medical University，Ganzhou 341ooo，China） *Corresponding Authors，E-mail：hqt@gmu.edu.cn；fxj@gmu.edu.cn；Linxf@gmu.edu.cn

Abstract：Thiourea （TU），as a sulfur-containing organic compound，is widelyused in industrial，agricultural， and pharmaceuticalfields.Althoughitsacute toxicityislow，long-term exposure maypose high biologicalandhealth risks，and it has been clasifiedas a Group 3carcinogenby the InternationalUnion for Researchon Cancer.Therefore，establishingarapidandhighlysensitiveTUdetection method isofgreatsignificance forenvironmentalmonitoring and food safety. This study successfully synthesized zinc doped carbon dot nanomaterials（ Zn CDs）using a onestep hydrothermal method.This material can directly catalyze the conversion of colorless substrate 3，3′，5，5′ -tetramethylbenzidine（TMB）to blue oxidation product（oxTMB）under xenon lamp irradiation，exhibiting excelent photocatalyticactivity.Basedontheabsorbanceandcolorchanges induced bytheinhibitionofthephotocatalyticreactionby TU，acolorimetric methodwithawide linear range and low detection limit wasestablished.Meanwhile， smartphone-based color recognition was employed for quantitativedetectionof TU.Finaly，the proposed method was appliedto thedeterminationofTUinreal watersamples，andtheresults demonstrated its goodaccuracyandfeasibility.

eywords：carbon dots；zinc doping；photocatalysis；colorimetric sensing；thiourea detecti

1引言

硫脲（Thiourea，TU）作为一种重要的化工原料，其在工业生产和农业领域应用广泛[1-2]。（剩余15814字）