The Study of Partially and Fully Oxidized Graphene Oxide Prepared by Green Synthesis for Wide-Scale Fabrication

Fatmawati, Dyah Ayu; Triyono, Triyono; Trisunaryanti, Wega; Oktaviano, Haryo Satriya; Chasanah, Uswatul

doi:10.31788/rjc.2021.1436004

Cited by 3 publications

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“… 65 , 66 In the FTIR GO spectrum, the hydroxyl and carboxyl peaks have indicated oxidation. 67 , 68 The insertion of functional oxygen-carrying groups in the GO form exhibited that the acidic and oxidative compounds successfully modified the surface, and this is in line with the SEM and TEM results.…”

Section: Resultssupporting

confidence: 80%

“…The emergence of the carbon peak was in line with the EDX analysis. The peak of moderate intensity at 1716 cm –1 indicated the CO stretching of carboxylic acid. − The peak at 1579 cm –1 is a symmetrical CC stretching vibration of the aromatic group, and the peak at 1103 cm –1 can be attributed to the C–C asymmetric stretching vibration of the aromatic group. , In addition, the two shoulder peaks at 2848 and 2927 cm –1 corresponded to the C–H aromatic sp strain vibrations. , In the FTIR GO spectrum, the hydroxyl and carboxyl peaks have indicated oxidation. , The insertion of functional oxygen-carrying groups in the GO form exhibited that the acidic and oxidative compounds successfully modified the surface, and this is in line with the SEM and TEM results.…”

Section: Resultsmentioning

confidence: 99%

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Dielectric Properties and Flexibility of Polyacrylonitrile/Graphene Oxide Composite Nanofibers

et al. 2022

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Energy storage and modern electronics industries are in essential need of high dielectric and highly flexible materials. In this study, polyacrylonitrile and reduced graphene oxide (PAN/GO) were prepared by electrospinning. The composite morphology produced a homogeneous, smooth, and flexible surface with high tensile strength and durability. The diameter of the fibers in the composite mats ranged from 232 to 592 nm. The X-ray diffraction pattern recording displayed a sharp peak characteristic centered between 20 and 30° angles with a maximum degree of crystallinity of 86.23%. The evaluation of the Fourier-transform infrared spectrum indicated the interaction between GO and PAN through hydrogen bonds. The differential scanning calorimetry measurements confirmed that GO acted as a nucleating agent that improves the thermal stability of the composite. The dielectric properties exhibited the relative permittivity of the composite of 86.4 with a dielectric loss (tan δ) of 4.97 at 10 2 Hz, and the maximum conductivity was achieved at 34.9 × 10 –6 Sm –1 at high frequencies.

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Dielectric Properties and Flexibility of Polyacrylonitrile/Graphene Oxide Composite Nanofibers

et al. 2022

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“…KMnO 4 1.3125 g was mixed with 0.375 g graphite powder (weight ratio of 3.5) and placed in Beaker I [22]. Then, in Beaker II, 45 mL H 2 SO 4 and 5 mL H 3 PO 4 (volume ratio of 9) were added.…”

Section: Synthesis Of Graphene Oxide (Go)mentioning

confidence: 99%

“…Therefore, in this work, we investigated the Pd/RGO utilizing the GO precursor obtained from the Tour method. This GO preparation was adapted from Fatmawati et al, which used a weight of oxidizing agent for graphite of 3.5 [22], which is lower than the usual value of 6. Then the Pd/RGO synthesis was carried out by microwave-assisted in-situ reduction heating using ascorbic acid.…”

Section: ■ Introductionmentioning

confidence: 99%

Microwave-Assisted Chemical Co-reduction of Pd Nanoparticles Anchored on Reduced Graphene Oxide with Different Loading Amounts

et al. 2022

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Microwave-assisted Palladium/Reduced Graphene Oxide (Pd/RGO) synthesis was effectively carried out in this study, which looked at the effects of different Pd loading weights in Graphene Oxide (GO) on its physicochemical qualities. The Tour technique was used to make GO, with a KMnO4:graphite weight ratio of 3.5. Meanwhile, Pd/RGO was synthesized utilizing the in-situ reduction method of one-pot synthesis with ascorbic acid as the green reducing agent, yielding Pd-0.5/RGO, Pd-1.0/RGO, and Pd-2.0/RGO, respectively, with variations in Pd loading weight of 0.5, 1.0, and 2.0%. XRD, FTIR, SAA, SEM-EDX, and TEM were used to examine all material characterizations. As a result, Pd-1.0/RGO had the largest surface area of 65.168 m2/g among the Pd-based materials, with a pore volume of 0.111 cc/g, the pore diameter of 3.316 nm, Pd crystallite size of 28.29 nm, RGO nanostructure dimension of 3.37 × 28.53 nm, and reduction level (C/O) of 3.02. This material also contains specific functional groups, including O-H, C-H, CO2, C=C, C=O, and C-O, based on FTIR spectra. Therefore, optimal weight loading of metal on the surface of the supporting material will provide a large material surface area. Increasing the surface area of the material improves its performance as a catalyst.

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Towards High-quality graphite oxide from graphite – Systemization of the balance in oxidative and mechanical forces for yield enhancement

Mahanta

Balaji

Pradhan

et al. 2022

Chemical Engineering Science

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The Study of Partially and Fully Oxidized Graphene Oxide Prepared by Green Synthesis for Wide-Scale Fabrication

Cited by 3 publications

References 0 publications

Dielectric Properties and Flexibility of Polyacrylonitrile/Graphene Oxide Composite Nanofibers

Dielectric Properties and Flexibility of Polyacrylonitrile/Graphene Oxide Composite Nanofibers

Microwave-Assisted Chemical Co-reduction of Pd Nanoparticles Anchored on Reduced Graphene Oxide with Different Loading Amounts

Towards High-quality graphite oxide from graphite – Systemization of the balance in oxidative and mechanical forces for yield enhancement

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