Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/80193
Title: The Exploration of IN SITU Carbon-Carbon Transitions to Form Porous Fibers
Authors: ZHOU YI'EN
Keywords: Porous Carbon Fibers, Carbon-Carbon Transitions, Dendritic Carbon, Carbon Precursor, Honeycomb Carbon, Phenol Removal
Issue Date: 7-Jan-2014
Source: ZHOU YI'EN (2014-01-07). The Exploration of IN SITU Carbon-Carbon Transitions to Form Porous Fibers. ScholarBank@NUS Repository.
Abstract: Though carbon-carbon transition systems and mechanisms have been extensively studied, this thesis aims to further explore areas that have not been previously described in literature. Unlike well-studied transformations relating to allotropes of carbon and other inorganic substances, this work investigates the conversion of activated carbon flakes derived from various polymers into carbon fibers. The conversion takes place through the in-situ vaporization-condensation of the activated polyaromatic hydrocarbon (PAH) flakes cut up by CO2 functioning as the etching gas, where porous carbon fibers and dendritic carbon structures are grown. The reverse-Boudouard reaction (CO2+C=2CO) is the theoretical chemistry primarily responsible for the etching of activated carbon by CO2. A further study was initiated to inquire if the reverse-Boudouard reaction could be mediated by a transition metal, resulting in dendritic carbon needles along the edges of the carbon flakes. The resultant fibers were also tested as adsorbent for gas and water purification.
URI: http://scholarbank.nus.edu.sg/handle/10635/80193
Appears in Collections:Ph.D Theses (Open)

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