Theses and Dissertations

Author

Wen Che

Issuing Body

Mississippi State University

Advisor

Barnes, H. Michael

Committee Member

Zhang, Dongmao

Committee Member

Horstemeyer, Mark

Committee Member

Shmulsky, Rubin

Committee Member

Shi, Q. Sheldon

Date of Degree

1-1-2012

Document Type

Graduate Thesis - Open Access

Major

Forest Products

Degree Name

Master of Science

College

College of Forest Resources

Department

Department of Forest Products

Abstract

The objective of this research was to study the catalytic graphitization of cellulose fibers coated with iron oxide nanoparticles. Bleached cellulose fibers and iron oxide nanoparticles coated cellulose fibers were pyrolyzed at five elevated temperatures. The crystallographic structures of carbon-encapsulated iron oxide nanoparticles were then investigated by the following techniques: Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Raman Spectroscopy, Transmission Electron Microscopy (TEM), and Selected-Area Electron Diffraction (SAED). The graphitization of cellulosic fibers was enhanced by the presence of iron oxide nanoparticles. Moreover, iron oxide nanoparticles deposited on cellulosic fiber samples pyrolyzed above 800°C produced graphitic structures. TEM and XRD were performed to identify and characterize the phase transitions of carbon-encapsulated iron oxide nanoparticles after pyrolysis treatment at four temperatures: 500°C, 800°C, 1000°C, and 1600°C. TEM of samples pyrolyzed at or above 800°C showed resulting units were core-shell structures consisting of dark grains and a light matrix with graphitic structure.

URI

https://hdl.handle.net/11668/20687

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