Hydrogenated Amorphous Carbon Films from Palmyra Sugar

Priyanto, Budhi; Asih, Retno; Ardiani, Irma Septi; Laila, Anna Zakiyatul; Nadiyyah, Khoirotun; Romadhon, Bima; Tunmee, Sarayut; Nakajima, Hideki; Triwikantoro, T.; Cahyono, Yoyok; Darminto, Darminto

doi:10.32604/jrm.2021.014466

Cited by 12 publications

(17 citation statements)

References 28 publications

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“…66-1214), having peaks mostly between 13-29 [22,23]. Meanwhile, the a-C:NS displays broad and weak intensity peaks at ~25 and ~43, implying an amorphous feature of graphitic carbon [24,25]. This result confirms a phase transformation from PP to amorphous carbon.…”

Section: Resultsmentioning

confidence: 79%

Dual Doping of Sulfur and Nitrogen Induces Hierarchical Porous Carbon from Wastes Medical Masks for Supercapacitor Electrodes

Retno Asih,

Fitriani,

Dylia Rahmadyanti

et al. 2024

IJNeaM

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Demand for battery and supercapacitor materials rapidly increases as energy storage deployments accelerate. Waste-based supercapacitors have become a point of interest to accommodate growing demand and awareness of environmentally friendly products. This work aims to examine how doping with sulfur and nitrogen affects the morphology and structure of porous carbon synthesized from waste medical masks and the electrochemical performances of the prepared electrodes. Nitrogen- and sulfur-doped porous carbon (a-C:NS) is successfully obtained by solvothermal and hydrothermal processes in an autoclave followed by chemical activation using potassium hydroxide (KOH) and a carbonization procedure. Sulfur- and nitrogen-doping increase the yield compared to the directly carbonized process of the waste medical mask. The a-C:NS sample has a porous feature, showing the presence of S, N, O, and dominant C elements and the formation of C-S and C-N bonds. The supercapacitor electrode prepared from a-C:NS shows an electric double layer capacitor (EDLC)-like characteristic with a high specific capacitance (CS) of 300 F/g at the scanning rate of 5 mV/s. This study shows a possible route to transform polypropylene waste into functional materials for supercapacitor electrodes.

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Section: Resultsmentioning

confidence: 79%

Dual Doping of Sulfur and Nitrogen Induces Hierarchical Porous Carbon from Wastes Medical Masks for Supercapacitor Electrodes

Retno Asih,

Fitriani,

Dylia Rahmadyanti

et al. 2024

IJNeaM

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show abstract

“…This means that sulfur doping introduced through the synthesis method can enhance the final yield of the sample. In addition to improving a chemical property [2], sulfur doping also generates a porous structure of the obtained aC-S. Figure 4 shows SEM images of the aC-S powders, illustrating a tube-like structure with a significant porous at its surface.…”

Section: Figure 2 Ftir Spectra Of the Medical Mask And Sample Resulte...mentioning

confidence: 99%

Synthesis Routes of Sulfur-doped Porous Carbon from Mask Wastes for the Application of Supercapacitor Electrodes

Rahmadyanti,

Fitriani,

Asih

et al. 2024

J. Phys.: Conf. Ser.

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Increasing demand of energy storage devices stimulates growing research in supercapacitors technologies. Waste-based supercapacitor electrodes has become one of areas to be explored as they offer an environmentally friendly approach. Here we synthesis porous carbon from wastes of medical masks which have been generated a lot since the pandemic. Medical masks are composed of polypropylene which have high porosity; hence they have a potential to be used as a porous carbon source for supercapacitor applications. The synthesis routes include a solvothermal process inside a Teflon autoclave in a microwave and a washing process using dilute acid solution and distilled water. The routes successfully transform polypropylene to porous carbon, confirmed by XRD, FTIR, SEM-EDX and Raman spectrum analyses. The present of C-S bond are indicated from FTIR spectrum, implying a successful doping of sulphur into porous carbon. The electrochemical analysis of the prepared electrode using cyclic voltammetry shows an EDLC-like feature with high specific capacitance of ∼375 Fg−1 at the scan rate of 5 mV/s.

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“…The structure configuration of boron-doped graphene includes BC3 (87.7%) and B4C (12.3%). The presence of boron atoms can open an energy band gap of 0.09 eV [14]. The results of computational studies also state that as the concentration of boron atoms in the graphene structure increases, the band gap energy also increases.…”

Section: Introductionmentioning

confidence: 94%

Effect of Boron Substitution on Magnetic and Electronic Properties of Single-Layered Graphene Studied by Density Functional Theory Method

Agustin,

Asih,

Arifin

et al. 2024

J. Phys.: Conf. Ser.

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Graphene is a two-dimensional material that has special characteristics. The electronic properties of graphene show zero band gap conditions. The magnetic properties of graphene can be created by modifying the electronic properties through atomic substitution. In this research, we study the magnetic and electronic properties of single-layer graphene substituted with boron (B) atoms, because it has almost the same atomic radius as carbon (C) atoms, resulting in only small lattice deformation. The spin-polarized density functional theory (DFT) method implemented in the Quantum Espresso package was selected to perform the calculations. The simulated models are a 4×4×1 supercell of pristine graphene structure consisting of 32 C atoms and boron-substituted graphene with a variety number of atoms (B = 1 and 2 atoms). The results of band gap energy obtained after the structure was optimized are 0.19 and 0.21 eV (spin-down and spin-up) for G-B and 0.36 and 0.37 eV (spin-down and spin-up) for G-2B. Boron substitution in graphene opens the bandgap and shifts the Fermi energy level. It also influences the magnetic moment of the graphene layer, estimated at 0.22 and 0.06 μB/cell for G-B and G-2B, respectively. This research shows that modifying graphene by substituting boron makes the graphene material semiconductive and weakly magnetic.

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Hydrogenated Amorphous Carbon Films from Palmyra Sugar

Cited by 12 publications

References 28 publications

Dual Doping of Sulfur and Nitrogen Induces Hierarchical Porous Carbon from Wastes Medical Masks for Supercapacitor Electrodes

Dual Doping of Sulfur and Nitrogen Induces Hierarchical Porous Carbon from Wastes Medical Masks for Supercapacitor Electrodes

Synthesis Routes of Sulfur-doped Porous Carbon from Mask Wastes for the Application of Supercapacitor Electrodes

Effect of Boron Substitution on Magnetic and Electronic Properties of Single-Layered Graphene Studied by Density Functional Theory Method

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