Performance Efficiency and Stability Assessment of Graphene Oxide-Based Heterogeneous Catalysts
Author : Ramirez, Denise Navasero
Major Adviser : Gatdula, Kristel M.
Major Co-Adviser : Aguila, Mae Joanne B.
Committee Members : Dizon, Lisa Stephanie H.; Eusebio, Ramon Christian P.
Year : 2020
Month : August
Type : Thesis
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Recently, graphene oxide (GO) has been gaining great attention in many research because it’s cheap, reusable and can be easily obtained from renewable sources. The presence of various functional groups on its edges and basal planes led to its remarkable performance in different reactions such as organic, electrochemical, and photochemical reactions. In this study, the efficiency of GO-catalyzed reactions was compared with non- catalytic and non-GO catalyzed reactions and the catalyst’s stability was evaluated. For organic reactions, the efficiency was based on the yield and/or selectivity of each reactions while for water disinfection applications, percent degradation of pollutants was used as basis. For stability, the analysis was based on whether the yield and/or selectivity of the reaction or degradation of pollutant changes significantly after the repeated use of the catalyst involved. Results revealed that the yield and/or selectivity as well as the percent degradation of the GO-catalyzed reactions were much higher compared with non-catalytic and non-GO catalyzed reactions. It was also observed that these GO catalysts could be easily recovered with no significant reduction in their catalytic performance even after being reused. Different studies claim that the remarkable performance of GO catalysts can be attributed to their structure and oxygen-containing functional groups. These studies were reviewed with the goal of discussing the various applications of GO heterogeneous catalysts to promote further investigations on synthesizing a more effective and stable form of GO-based catalysts and explore GO’s great performance especially in electrochemical reactions since GO’s full potential as catalyst has not yet been reached.
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