研究目的
Investigating the preparation of carbon quantum dots (CQDs) inside a Nafion matrix via hydrothermal treatment of organic precursors and characterizing the swelling and ion transport properties of the resulting composite materials.
研究成果
Hydrothermal treatment of Nafion membranes impregnated with organic precursors successfully produced CQDs, enhancing membrane swelling and proton conductivity. The presence of CQDs reduced proton conductivity but remained above that of pristine membranes. Vanadyl permeability was marginally affected by the modifications.
研究不足
The study faced challenges in reproducing certain experiments due to the fragility of specimens. The effect of Nafion matrix on hydrothermal synthesis of CQDs requires more systematic experiments for full elucidation.
1：Experimental Design and Method Selection:
Hydrothermal treatment was chosen for the synthesis of CQDs due to its simplicity and versatility. The precursors (ascorbic acid, glucose, and glucosamine hydrochloride) were selected based on their propensity to form carbon nanoparticles under hydrothermal conditions.
2：Sample Selection and Data Sources:
Commercial Nafion 112 membranes were used, conditioned via sequential boiling in various solutions before hydrothermal treatment.
3：List of Experimental Equipment and Materials:
Teflon autoclave reactor, UV lamp for fluorescence observation, and standard laboratory equipment for membrane characterization.
4：Experimental Procedures and Operational Workflow:
Membranes were soaked in precursor solutions, subjected to hydrothermal treatment at 160 °C for 6 hours, then rinsed and treated with sulfuric acid.
5：Data Analysis Methods:
Membrane thickness, water content, proton conductivity, and vanadyl ion permeability were measured and analyzed.
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