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硅量子点修饰海藻酸钠-羧甲基纤维素钠纳米复合生物聚合物薄膜的荧光和力学性能

Fluorescent and Mechanical Properties of Silicon Quantum Dots Modified Sodium Alginate-Carboxymethylcellulose Sodium Nanocomposite Bio-Polymer Films.

作者信息

Ji Yali, Zhang Huimin, Zhang Canfu, Quan Zhiyi, Huang Min, Wang Lili

机构信息

College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, China.

Ministry of Education Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, China.

出版信息

Polymers (Basel). 2019 Sep 9;11(9):1476. doi: 10.3390/polym11091476.

DOI:10.3390/polym11091476
PMID:31505896
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6780071/
Abstract

Highly luminescent silicon quantum dots (SiQDs) were prepared via one-pot hydrothermal route. Furthermore, the optimal synthetic conditions, dependence of the emission spectrum on the excitation wavelength and fluorescent stability of SiQDs were investigated by fluorescence spectroscopy. SiQDs exhibited bright blue fluorescence, and photoluminescence (PL) lifetime is 10.8 ns when excited at 325 nm. The small-sized SiQDs (~3.3 nm) possessed uniform particle size, crystal lattice spacing of 0.31 nm and silicon (111), (220) crystal planes. Luminescent SiQDs/sodium alginate (SA)-carboxymethylcellulose sodium (CMC) nanocomposite bio-polymer films were successfully fabricated by incorporating SiQDs into the SA-CMC matrix. Meanwhile, SiQDs not only impart strong fluorescence to the polymer, but also make the composite films have favorable toughness.

摘要

通过一锅水热法制备了高发光硅量子点（SiQDs）。此外，通过荧光光谱研究了SiQDs的最佳合成条件、发射光谱对激发波长的依赖性以及荧光稳定性。SiQDs呈现出明亮的蓝色荧光，在325nm激发时光致发光（PL）寿命为10.8ns。小尺寸的SiQDs（~3.3nm）具有均匀的粒径、0.31nm的晶格间距以及硅（111）、（220）晶面。通过将SiQDs掺入海藻酸钠（SA）-羧甲基纤维素钠（CMC）基质中，成功制备了发光SiQDs/SA-CMC纳米复合生物聚合物薄膜。同时，SiQDs不仅赋予聚合物强烈的荧光，还使复合薄膜具有良好的韧性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/0f0e9ad16543/polymers-11-01476-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/72c7133607fa/polymers-11-01476-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/4c5b9b149966/polymers-11-01476-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/ac5821362748/polymers-11-01476-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/bf9941a4dc4f/polymers-11-01476-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/0a464e243275/polymers-11-01476-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/c20027fa569a/polymers-11-01476-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/a2686371d14a/polymers-11-01476-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/0f0e9ad16543/polymers-11-01476-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/72c7133607fa/polymers-11-01476-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/4c5b9b149966/polymers-11-01476-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/ac5821362748/polymers-11-01476-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/bf9941a4dc4f/polymers-11-01476-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/0a464e243275/polymers-11-01476-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/c20027fa569a/polymers-11-01476-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/a2686371d14a/polymers-11-01476-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e2d0/6780071/0f0e9ad16543/polymers-11-01476-g008.jpg

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本文引用的文献

[1]
Nanoforest: Polyaniline Nanotubes Modified with Carbon Nano-Onions as a Nanocomposite Material for Easy-to-Miniaturize High-Performance Solid-State Supercapacitors.

Polymers (Basel). 2018-12-19

[2]
Luminescent and UV-Shielding ZnO Quantum Dots/Carboxymethylcellulose Sodium Nanocomposite Polymer Films.

Polymers (Basel). 2018-10-8

[3]
Synthesis of Poly(ε-caprolactone)-Based Miktoarm Star Copolymers through ROP, SA ATRC, and ATRP.

Polymers (Basel). 2018-8-2

[4]
The Structure and Mechanical Properties of the UHMWPE Films Modified by the Mixture of Graphene Nanoplates with Polyaniline.

Polymers (Basel). 2018-12-24

[5]
Size-Dependent Electronic Properties of Uniform Ensembles of Strongly Confined Graphene Quantum Dots.

J Phys Chem Lett. 2019-3-7

[6]
Highly sensitive and selective "off-on" fluorescent sensing platform for ClO in water based on silicon quantum dots coupled with nanosilver.

Anal Bioanal Chem. 2019-2-14

[7]
White-Light-Emitting Melamine-Formaldehyde Microspheres through Polymer-Mediated Aggregation and Encapsulation of Graphene Quantum Dots.

Adv Sci (Weinh). 2018-11-22

[8]
Synthesis of Silicon Quantum Dots with Highly Efficient Full-Band UV Absorption and Their Applications in Antiyellowing and Resistance of Photodegradation.

ACS Appl Mater Interfaces. 2019-1-30

[9]
Eco-friendly modification of a regenerated cellulose based film by silicon, carbon and N-doped carbon quantum dots.

Carbohydr Polym. 2018-10-29

[10]
Solid-State Carbon Dots with Efficient Cyan Emission towards White Light-Emitting Diodes.

Chem Asian J. 2018-12-13

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