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Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications

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Preparation and application of solid-state upconversion materials based on sodium polyacrylate.

Changqing Ye¹, Jinsuo Ma¹, Pengju Han¹

¹Research Centre for Green Printing Nanophotonic Materials, Jiangsu Key Laboratory for Environmental Functional Materials, Institute of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology Suzhou 215009 P. R. China wxyhpj@163.com.

|May 6, 2022

Summary

This summary is machine-generated.

This study developed a novel water-absorbent resin upconversion material for photocatalysis. The material efficiently converts low-energy light to high-energy light, overcoming oxygen quenching for practical applications.

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Area of Science:

Materials Science
Photocatalysis
Upconversion Technology

Background:

Upconversion (UC) materials are crucial for photocatalysis, but often suffer from oxygen quenching in ambient conditions.
Triplet-triplet annihilation upconversion (TTA-UC) offers an efficient pathway but requires specific environments.
Developing solid-state TTA-UC materials is essential for practical applications.

Purpose of the Study:

To fabricate a novel water-absorbent resin (WAR) based upconversion (UC) material for photocatalysis.
To address the oxygen quenching issue in TTA-UC systems.
To demonstrate the material's efficacy in photocatalytic synthesis and degradation.

Main Methods:

Fabrication of a WAR UC material by loading a sensitizer/emitter microemulsion into porous sodium polyacrylate (PAAS).
Utilizing a triplet-triplet annihilation upconversion (TTA-UC) oil-in-water (O/W) microemulsion.
Testing the material's performance in synthesizing 7-hydroxycoumarin and degrading rhodamine B.

Main Results:

The developed WAR UC material exhibited a highly efficient UC process in ambient conditions due to its liquid/solid encapsulation.
The material successfully excited Pt/WO3 to produce hydroxyl radicals for coumarin conversion.
Photocatalytic degradation of rhodamine B was achieved with up to 97% efficiency by utilizing the UC emission to generate hole-electron pairs.

Conclusions:

The novel WAR UC material effectively overcomes oxygen quenching in TTA-UC processes.
This work presents a new pathway for developing solid-state TTA-UC devices.
The material shows significant potential for future practical applications in photocatalytic synthesis and degradation.