A Case Study on the Comparative Properties and Performance of Graphite Oxide, Graphene Oxide and Reduced Graphene Oxide on Cationic Dye Treatment
Author : Acasio, John Penedict Piol
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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Adsorbent related studies have grown in number exponentially over the recent years. Thus, the goal of this study is to determine the best adsorbent among GrO, GO, and GrO. The major parameters to be compared are removal efficiency and adsorption capacity. Reduced graphene oxide was concluded to be the most competent of the three. It had the highest adsorption capacity of 1301.80 mg/g when it is reduced for 48 hours during synthesis. Also, rGO obtained 100 % removal efficiency across three different studies. The best synthesis methodology to be used is Modified Hummer’s Method paired with L- Cysteine reduction. Cationic dye adsorption pH was determined to perform best at the neutral to alkaline range due to the lack of competition between the cationic dye and the functional groups of the adsorbent. It is recommended that future comparative studies should include more parameters to be subjected to comparison. These parameters include temperature, dye concentration, and pressure, which also influence adsorption mechanisms. Lastly, it was determined that graphene-based nanocomposites have potential for wastewater treatment application with enhanced photocatalytic and adsorption capabilities. Other future applications such as air purification and 3D biomedical scaffolding were also discussed.
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