Synthesis of graphene oxide from used electrode graphite with controlled oxidation process

Handayani, Murni; Ganta, M.; Susilo, D N A; Yahya, M.S.; Sunnardianto, Gagus Ketut; Darsono, Nono; Sulistiyono, Eko; Setiawan, Iwan; Lestari, Franciska Pramuji; Erryani, Aprilia

doi:10.1088/1757-899x/541/1/012032

Cited by 22 publications

(11 citation statements)

References 14 publications

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“…Despite the sulfur residue, manganese and nitrogen impurities were not detected in the synthesized GO (Fig. 5e and f) 65,66 . The elemental analysis by XPS revealed that the contents of carbon, oxygen, and sulfur were 65.9, 33.6, and 0.4 at%, respectively.…”

Section: Characteristics Of Go From Modified Hummers' Methodsmentioning

confidence: 97%

Reduced graphene oxide/zinc oxide composite as an electrochemical sensor for acetylcholine detection

Pitiphattharabun,

Auewattanapun,

Htet

et al. 2024

Sci Rep

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Acetylcholine (ACh) plays a pivotal role as a neurotransmitter, influencing nerve cell communication and overall nervous system health. Imbalances in ACh levels are linked to neurodegenerative diseases, such as Alzheimer's and Parkinson's. This study focused on developing electrochemical sensors for ACh detection, utilizing graphene oxide (GO) and a composite of reduced graphene oxide and zinc oxide (rGO/ZnO). The synthesis involved modified Hummers' and hydrothermal methods, unveiling the formation of rGO through deoxygenation and the integration of nano-sized ZnO particles onto rGO, as demonstrated by XPS and TEM. EIS analysis also revealed the enhancement of electron transfer efficiency in rGO/ZnO. Cyclic voltammograms of the electrode, comprising the rGO/ZnO composite in ACh solutions, demonstrated prominent oxidation and reduction reactions. Notably, the composite exhibited promise for ACh detection due to its sensitivity, low detection threshold, reusability, and selectivity against interfering compounds, specifically glutamate and gamma-aminobutyric acid. The unique properties of rGO, such as high specific surface area and electron mobility, coupled with ZnO's stability and catalytic efficiency, contributed to the composite's potential in electrochemical sensor applications. This research, emphasizing the synthesis, fabrication, and characterization of the rGO/ZnO composite, established itself as a reliable platform for detecting the acetylcholine neurotransmitter.

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Section: Characteristics Of Go From Modified Hummers' Methodsmentioning

confidence: 97%

Reduced graphene oxide/zinc oxide composite as an electrochemical sensor for acetylcholine detection

Pitiphattharabun,

Auewattanapun,

Htet

et al. 2024

Sci Rep

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“…Among them, 1449 cm −1 is the torsional vibration of the−OH bond, and 1380 cm −1 is the stretching vibration of C− O. 24,25 This indicates that the oxidation treatment successfully generated many oxygen-containing groups on the MWCNTs. Comparison between the O-MWCNTs and the rest of the samples showed that the loading of Pt resulted in a decrease in the peak intensity of the oxygen-containing groups.…”

Section: Structural and Morphological Characterization Of Catalystsmentioning

confidence: 98%

Stepwise Preparation of Uniform-Size Ultrafine Pt Nanoparticles for High-Performance Catalysis of Methanol Oxidation and Nitrophenol Reduction

Li,

Xian,

Zhao

et al. 2023

ACS Appl. Nano Mater.

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Ultrafine Pt nanoparticles (Pt UPs) were prepared using a stepwise modulation approach, ensuring consistent reaction kinetics throughout each step to achieve uniform size and high dispersion of Pt UPs. The morphology of the Pt nanoparticle was precisely controlled by managing the reaction conditions at each step, thereby enhancing the catalytic activity of the Pt metals. In order to form photoinduced hydrolysis products with different dispersions and particle sizes, two steps were conducted. First, homogeneously dispersed photoinduced hydrolysis products were adsorbed on nitrogen-doped multiwalled carbon nanotubes using ice photochemistry under stabilizer-free conditions. Second, these products were photoinduced by using different wavelengths of light. Subsequent in situ reduction with various reducing agents influenced the composition, particle size, and dispersion degree of the Pt UPs. Furthermore, the subtle charge transfer between the supporter and Pt was adjusted by employing low- and high-temperature nitrogen doping methods, resulting in Pt UPs with electron-deficient and electron-rich charge structures on the surface. This study offers insights into the precise modulation of the Pt nanoscale morphology and reveals the subtle adjustments in charge transfer between the supporter and the metal through nitrogen doping. Additionally, the origin of the catalytic activity of Pt in various reactions was explored.

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“…rGO derived from spent coffee grounds has been reported as electrode material for RFBs [61]. The coffee grounds were washed and dried, then were carbonized at 850 • C in nitrogen for 2 (rGO-2) or 3 h (rGO-3), chemically activated via modified Hummer's method to prepare GO [62], then reduced by hydrazine monohydrate reduction to produce rGO [63], obtaining BET surface areas of 72 m 2 g −1 for both rGO-2 and rGO-3. The rGO-3 sample presented 1% more O and rGO-2 1% more N determined by XPS, indicating higher reduction in the case of rGO-2.…”

Section: Boosting Activity Of Carbon Felts Via Decoration With Biomas...mentioning

confidence: 99%

Sustainable electrodes for the next generation of redox flow batteries

2022

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The development of alternative energy storage technologies is key to advance renewable energy resources. Among them, redox flow batteries (RFBs) have been identified to be one of the most promising technologies in the field of stationary batteries. The carbon-based electrodes in these batteries are a crucial component and play an important part in achieving high efficiency and performance. A further leap into this direction is the design of fossil-free materials by incorporating sustainable alternative resources as the carbon component in the processing of the electrodes. The use of biomass as carbon precursor for electrode applications has also been a focus of research for other energy storage devices and in the case of RFBs, it has become an emergent topic in recent years. This short review presents the recent advances in the design of biomass-derived carbon materials as electrodes in RFBs, strategies to enhance their electrocatalytic properties, challenges, and future outlook in the design of sustainable electrode materials.

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Synthesis of graphene oxide from used electrode graphite with controlled oxidation process

Cited by 22 publications

References 14 publications

Reduced graphene oxide/zinc oxide composite as an electrochemical sensor for acetylcholine detection

Reduced graphene oxide/zinc oxide composite as an electrochemical sensor for acetylcholine detection

Stepwise Preparation of Uniform-Size Ultrafine Pt Nanoparticles for High-Performance Catalysis of Methanol Oxidation and Nitrophenol Reduction

Sustainable electrodes for the next generation of redox flow batteries

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