Confined synthesis of phosphorus, nitrogen co-doped carbon dots with green luminescence and anion recognition performance

被引：26

作者：

Yang, Xiaolin ^{[1
]}

Zhang, Yushan ^{[1
]}

Liu, Wanqiang ^{[2
]}

Gao, Jinwei ^{[3
]}

Zheng, Yuhui ^{[1
]}

机构：

[1] South China Normal Univ, Sch Chem & Environm, Key Lab Theoret Chem Environm, Minist Educ, Guangzhou 510006, Guangdong, Peoples R China

[2] Hunan Univ Sci & Technol, Sch Chem & Chem Engn, Xiangtan 411201, Peoples R China

[3] South China Normal Univ, Guangdong Prov Engn Technol Res Ctr Transparent C, Guangzhou 510006, Guangdong, Peoples R China

来源：

POLYHEDRON | 2019年 / 171卷

基金：

中国国家自然科学基金;

关键词：

Carbon dots; Luminescence; Sensor; Nitrite; Cellular imaging; SENSITIVE DETECTION; QUANTUM DOTS; WATER; NITRITE; NANODOTS; NANOPLATFORM; COMPOSITE; PROBE; IONS;

D O I：

10.1016/j.poly.2019.07.040

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Carbon nanomaterials have aroused considerable interests due to excellent optical performances, but most of achieved carbon dots possess blue luminescence under UV-light irradiations. Herein, we report the preparation of phosphorus and nitrogen co-doped carbon quantum dots (PNCQDs) via hydrothermal method by employment of 1,3-phenylenediamine, citric acid and H3PO4 as precursors. The particle size of the water-soluble PNCQDs is in the range between 4 and 6 nm and the average diameter is determined to be 4.75 nm. The resulted quantum dots give rise to bright green emission at 504 nm and the excitation-dependent behavior has been found. Moreover, it demonstrates luminescence stability toward a broad pH range from 1 to 10. Fluorometric titration studies reveal that close interactions occur between carbon dots and nitrite ions and a switched off effect has been achieved. In addition, prospective application of the quantum dots in tap water and live cells has also been demonstrated. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：389 / 395

页数：7

共 33 条

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