ACADSTAFF UGM

CREATION
Title : HYDROXYL FUNCTIONALIZED GRAPHENE AS A SUPERIOR ANODE MATERIAL FOR ELECTROCHEMICAL OXIDATION OF METHYLENE BLUE
Author :

YUSBARINA (1) Prof. Drs. Roto, M.Eng, Ph.D. (2) Prof. Dr. Eng. Kuwat Triyana, M.Si. (3)
Date : 1 2021
Keyword : Hydroxyl functionalized graphene, exfoliation, sonication, electrochemical degradation, methylene blue Hydroxyl functionalized graphene, exfoliation, sonication, electrochemical degradation, methylene blue
Abstract : Graphene and its derivates are among the emerging materials to be studied extensively for many electrochemical applications. The objective of the work is to study the hydroxyl functionalized graphene-modified electrode in the electrochemical oxidation of methylene blue, which is known as a major industrial dye. Hydroxyl functionalized graphene (G-OH) was first prepared using graphite as a precursor by a combination of electrochemical exfoliation and sonication methods. Graphite was electrochemically exfoliated in 1.0 M Li2SO4 solution for 2 h to produce oxidized graphene flakes. The oxidized graphene flakes were sonicated in 75?etone for 2 h to yield G-OH. The product crystal structure and elemental composition were checked with XRD and SEM-EDX. The produced G-OH has the atomic composition of C 77.98% and O 22.02%. We also confirmed the product by UV-Vis, FTIR, and Raman spectrometries. The G-OH was deposited on the stainless-steel electrode (SS) and tested in the electrochemical oxidation of methylene blue (MB). The cyclic voltammogram of the bare SS electrode and SS/G-OH modified electrode gives oxidation current peak detected at -0.61 V by 0.47 mA and 5.58 mA, respectively. It suggested a high electrocatalytic ability of the SS/G-OH electrode for the electrochemical oxidation reaction. The electrochemical process by the electrode could degrade >92% of the initial MB within 5 min and 98% within 30 min. The GC data suggested that MB mainly degraded to CO2 and H2O. This graphene-based electrode could be a potential for the electrochemical oxidation of many organic pollutants to yield environmentally friendly products.
Group of Knowledge : Kimia
Original Language : English
Level : Internasional
Status :
Published
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1 Rasayan J Chem RKI.pdf
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2 jurnal_2081081_d03d0827db80bd6f3da8dc1a2c9623d7.pdf
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3 jurnal_2081081_d03d0827db80bd6f3da8dc1a2c9623d7.pdf
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4 jurnal_2101436_9398414f5274bf20c52546fe6fba571a.pdf
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