文献类型：期刊文献

英文题名：Potential Application of Nitrogen-Doped Carbon Quantum Dots Synthesized by a Solvothermal Method for Detecting Silver Ions in Food Packaging

作者：Lu, Zifan[1];Su, Tiantian[1];Feng, Yanting[1];Jiang, Shiqi[2,3];Zhou, Chunxia[1];Hong, Pengzhi[1,2];Sun, Shengli[3];Li, Chengyong[2,3]

机构：[1]Guangdong Ocean Univ, Coll Food Sci & Technol, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Shenzhen Inst, Shenzhen 518108, Peoples R China;[3]Guangdong Ocean Univ, Sch Chem & Environm, Zhanjiang 524088, Peoples R China

年份：2019

卷号：16

期号：14

外文期刊名：INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH

收录：SSCI(收录号：WOS:000480659300071)、SCI-EXPANDED(收录号：WOS:000480659300071)、、Scopus(收录号：2-s2.0-85070469134)、WOS

基金：This research was funded by the National Natural Science Foundation of China (21874029), Guangdong Yangfan Program (201635018), Guangdong Special Support Program (2017TQ04N706), Science and Technology Planning Project of Guangdong Province (2016A020210114), Science and Technology Planning Project of Shenzhen City (JCYJ20170818111719650), Industrial Development Special Funds of Dapeng New Area (KY20170209, KY20180202) and Innovation and Development Project aboutMarine Economy Demonstration of Zhanjiang City (2017C8B1).

语种：英文

外文关键词：Nitrogen-doped carbon quantum dots; fluorescence intensity; Ag+; food packaging material

外文摘要：In this paper, nitrogen-doped carbon quantum dots ( N-CQDs) were synthesized by a solvothermal method using 1,2,4-triaminobenzene as a carbon precursor. The surface of the synthesized N-CQDs was modified with amino functional groups. The results indicated that N-CQDs had various N-related functional groups and chemical bonds and were amorphous in structure. At the same time, the quantum yield of N-CQDs was 5.11%, and the average lifetime of fluorescence decay was 5.79 ns. The synthesized N-CQDs showed good selectivity for and sensitivity to Ag+. A linear relationship between N-CQDs detection efficiency and Ag+ concentration was observed for concentration ranges of Ag+ corresponding to 0-10 mu M and 10-30 mu M. In addition, N-CQDs were used for the detection of trace Ag+ in food packaging material. The silver ion content of the sample determined by the N-CQDs detection method was 1.442 mg/L, with a relative error of 6.24% with respect to flame atomic absorption spectrometry, according to which the Ag+ content was 1.352 mg/L. This indicates that the N-CQDs detection method is reliable. Therefore, the N-CQDs prepared in this paper can detect Ag+ rapidly, simply, and sensitively and are expected to be a promising tool for the detection of trace Ag+ in food packaging materials.