Effect of bacterial cellulose on the conversion of copper nanoparticles to Cu2O nanocrystals
Date of Publication
2016
Document Type
Bachelor's Thesis
Degree Name
Bachelor of Science in Biochemistry
Subject Categories
Biochemistry
College
College of Science
Department/Unit
Chemistry
Honor/Award
Glenn V. Alea
Thesis Adviser
Gerardo C. Janairo
Defense Panel Chair
Francisco C. Franco
Derrick Ethelbert C. Yu
Defense Panel Member
Francisco C. Franco
Abstract/Summary
Copper-based nanoparticles specifically nanocrystals were successfully synthesized through the horizontal vapor phase growth technique (HVPGT). Bacterial cellulose (BC) was incorporated with 10% copper overnight and was subjected to in situ reduction reaction approach via the reducing agents: sodium borohydride (NaBH4) and ascorbic acid (AscA). The reduction of copper on BC with sodium borohydride yielded copper nanosphres while reduction via ascorbic acid resulted to copper nanoflakes as seen under the scanning electron microscope (SEM). Characterization of the copper nanoparticles was then conducted via energy dispersive X-ray spectroscopy (EDX) which showed copper composition of approximately 90% and 70% for the nanospheres and nanoflakes respectively. The reduced BC-CU nanocomposites were placed in a quartz tube and was vacuum sealed at a vacuum pressure of approximately 10-5 torr. SEM micrographs of both samples at 1000oC showed incomplete formation of nanoparticles while SEM micrographs at 1200oC showed the formation of Cu2O nanocrystals for the BC-Cu nanocomposite reduced via NaBH4 and irregulary-shaped, spherical and hexagonal planar nanoparticles for the sample reduced via AscA.
Abstract Format
html
Language
English
Format
Accession Number
TU18952
Shelf Location
Archives, The Learning Commons, 12F, Henry Sy Sr. Hall
Physical Description
xix, 109 leaves, illustrations (some color), 28 cm.
Keywords
Nanostructured materials; Copper--Assaying
Recommended Citation
Diwa, M. B., & Floro, J. S. (2016). Effect of bacterial cellulose on the conversion of copper nanoparticles to Cu2O nanocrystals. Retrieved from https://animorepository.dlsu.edu.ph/etd_bachelors/14961
Embargo Period
5-10-2021