Date of Publication
10-2020
Document Type
Master's Thesis
Degree Name
Master of Science in Chemistry
Subject Categories
Chemistry
College
College of Science
Department/Unit
Chemistry
Thesis Adviser
Drexel H. Camacho
Defense Panel Chair
Rafael A. Espiritu
Defense Panel Member
Jaime Raul O. Janairo
Abigail P. Cid-Andres
Abstract/Summary
Carbon nanodots (CNDs) is one of the new excellent carbon nanomaterials, which received a significant interest due to its excellent high fluorescence properties. This study explored the potential of carrageenan (ᴋ-, ɩ-, λ-) as a carbon source for CNDs since it contains sulfate ester groups that might offer different properties. TEM analysis showed the CNDs to have quasi-spherical shapes with average size at 3.8 nm. The CNDs were embedded in the carrageenan film to prevent its aggregation and to increase its stability for various applications. The CNDs embedded in films show different properties compared to bare CNDs in solution as determined by Dynamic Light Scattering, Zeta potential, UV-Vis, Fluorescence, FTIR, and NMR spectroscopies. The films loaded with CNDs were explored for its application in sensing heavy metal, degradation of dyes and antimicrobial activity. Results showed the potential of CNDs in films to selectively detect Cu2+ using digital colorimetric analysis. Its potential use in degrading dyes such as methyl orange and Eriochrome Black T was shown positively. Likewise, quick investigation on its effect in preventing the growth of molds was demonstrated. The study demonstrated the difference of the carrageenan-based CNDs compared to the CNDs prepared from simple sugar and showed its potential application outside the food industry.
Abstract Format
html
Language
English
Format
Electronic
Physical Description
xv, 144 leaves
Keywords
Nanoparticles; Quantum dots; Nanostructured materials
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Recommended Citation
Leuterio, J. C. (2020). Film-based carbon nanodots from carrageenan and its effects on heavy metals, dyes, and microbes. Retrieved from https://animorepository.dlsu.edu.ph/etd_masteral/5956
Embargo Period
5-4-2022