Application of fluorescent carbon quantum dots functional modified carboxymethyl cellulose film in toluene gas specific detection

被引:1
|
作者
Zhao, Tengda [1 ]
Han, Liang [1 ]
Jia, Benzhen [1 ]
Li, Qing [1 ]
Huang, Xiaoyu [1 ]
Dong, Hongyu [1 ]
Ren, Hongwei [1 ,2 ,3 ]
Zhang, Jinfeng [1 ,2 ,3 ]
机构
[1] Hebei Univ Sci & Technol, Sch Environm Sci & Engn, Shijiazhuang 050018, Hebei, Peoples R China
[2] Pollut Prevent Biotechnol Lab Hebei Prov, Shijiazhuang 050018, Hebei, Peoples R China
[3] Ctr Volatile Organ Cpds & Odorous Pollut Control T, Natl Local Joint Engn, Shijiazhuang 050018, Hebei, Peoples R China
基金
美国国家科学基金会;
关键词
Toluene; Carbon quantum dots; Carboxymethyl cellulose film; Fluorescent spectrometry; VOLATILE ORGANIC-COMPOUNDS; PERSPECTIVE;
D O I
10.1016/j.ijbiomac.2024.134005
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
With the increasing consumption of organic solvents in chemical and pharmaceutical industries, the environment pollution of volatile organic compounds (VOCs) has become an urgent problem. Therefore, the rapid-visual detection method is of great significance in the analysis of VOCs. Based on the fluorescence quenching/ enhancement mechanism of carbon quantum dots (CQDs), with the help of carboxymethyl cellulose membrane with porous and large specific surface area structure, a series of green CQDs@carboxymethyl cellulose composite film (CQDs@CMC composite film) was prepared in this study. In the typical-targeted pollutants (toluene) detection application, a fluorescence spectroscopy method was established which could achieve the high sensitivity and strong specificity detection. The mainly conclusions were as follows: The fluorescence spectrometric detection method for toluene: A kind of hydrophobic Lmi/Bet CQDs@CMC composite film was prepared and characterized with imidazole/betaine CQDs and porous carboxymethyl cellulose composite film as raw materials. The toluene detection performance was studied, and the recognition mechanism was explored. The results showed that toluene enhanced the fluorescence of Lmi/Bet CQDs@CMC composite film. The fluorescence intensity of composite films was proportional to toluene concentration when the toluene concentration ranged from 200 to 2200 mg/L. The detection limit of toluene was 1.169 mg/L, which provides a theoretical basis for the detection of toluene by fluorescence spectrometry.
引用
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页数:10
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