Extraction and Characterization of Preformed Mixed Phase Graphene Sheets from Graphitized Sub-Bituminous Coal

Rao, Akshatha A.; Raj, Ashlin M.; Balachandran, Manoj

doi:10.14233/ajchem.2017.20722

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…Ethylene diaminetetraacetic acid being a chelating agent will form complexes with the majority of the metals such as aluminum and titanium. The formed complex was eliminated from the synthesized material by acid treatment which was applied to the complex solution, leaving behind the material of interest (Rao et al 2017). The XRD spectra presented in Figure 3 revealed that the diffractogram of the raw coal has 2θ° values stretching between 11° to 65°.…”

Section: Characterization Of Raw Coal and Synthesized Coal Graphene (Scg)mentioning

confidence: 99%

Preparation, characterization, and application of a homemade graphene for the removal of Congo red from aqueous solutions

Popoola

Okoronkwo

Oluwasina

et al. 2021

Environ Sci Pollut Res

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Ethylene diaminetetraacetic acid (EDTA) functionalized graphene was synthesized from Nigerian coal using a chemical exfoliation method and the graphene was applied for the removal of Congo red dye from aqueous solutions.The synthesized coal graphene and the raw coal were characterized using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) spectroscopy, Scanning electron microscopy and Energy (SEM)-Energy dispersive X-ray (EDX) spectroscopy. The SEM data revealed surface roughness which is enhanced in the prepared graphene while the EDX revealed an increase in carbon, the main constituent of graphene, from about 26% in the raw coal to about 80% in the prepared graphene. Various adsorption parameters, such as pH, contact time, concentration of Congo red and temperature, were varied for the removal of the dye using raw coal and the synthesized coal graphene. The Liu isotherm gave the best fit of the equilibrium data than the Langmuir, Freundlich and Dubinin-Radushkevich models. The maximum adsorption capacities of the raw coal and synthesized coal graphene at 25 °C are 109.1 mg/g and 129.0 mg/g, respectively. The Avrami fractional order kinetic model was the best model for description of the kinetic data. The model had the lowest values of standard deviation than the pseudo-first order and pseudo-second order models. The adsorption process of the two materials occurred via two stages as proved by intraparticle diffusion model. The adsorption process of the Congo red removal was spontaneous, feasible and endothermic. The study conclusively revealed the graphene nanomaterial to be a viable adsorbent for textile wastewater treatment.

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Section: Characterization Of Raw Coal and Synthesized Coal Graphene (Scg)mentioning

confidence: 99%

Preparation, characterization, and application of a homemade graphene for the removal of Congo red from aqueous solutions

Popoola

Okoronkwo

Oluwasina

et al. 2021

Environ Sci Pollut Res

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show abstract

“…The structural parameters are elucidated and depicted in Table-1. The typical 2θ values for the sp 2 carbon forms of the (002) planes occur at approximately 25°, which constitutes the π band. However, there is a marked broadening of the peak, which can be attributed to the γ band, formed due to aliphatic [2][3][4][5][6]. Lattice strain can also result in the broadening of the peak, but due to the small particle size, this effect is negligible.…”

Section: And Discussionmentioning

confidence: 99%

Synthesis of Graphene Oxide Nano Structures from Kerosene Soot and its Impedance Analysis

Khan¹,

Jayachandran²,

Balachandran³

2018

Asian J. Chem.

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Nanotechnology and nanocarbon has gained tremendous progress in recent years owing to their versatile properties. It broadly deals with the making, characterization and utility of materials, devices and systems with dimensions in the nano range, exhibiting significantly enhanced physical, chemical and biological properties. Investigation of different types of carbon nanostructures and graphene-forms the trending field in Material Science [1-4]. Hence, newer, simpler ways are being devised to synthesize this wonder material-graphene. Synthesis of graphene at a large scale is still a challenge, owing to the economy of the methods employed. In the present work, kerosene soot has been employed as the precursor for the synthesis of few-layered graphene oxide. Also, soot being one of the pollutants of the atmosphere, harnessing it and using it to produce a fine material such as graphene, would be an ecofriendly solution to the current needs. Dielectric measurements and conductivity studies have been reported for a wide variety of inorganic semiconductors. In nanocarbon materials such reported studies are scarce. EXPERIMENTAL Kerosene soot: Kerosene soot was prepared by burning kerosene in a glass bottle, with the help of a wick and collecting the product of the incomplete combustion (soot) on a tile. This black matter was then transferred to containers and labelled

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An outlook on zero-dimensional nanocarbons as components of DSSC

Rao

Joseph²,

Balachandran³

2022

Biomass Conv. Bioref.

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Extraction and Characterization of Preformed Mixed Phase Graphene Sheets from Graphitized Sub-Bituminous Coal

Cited by 4 publications

References 17 publications

Preparation, characterization, and application of a homemade graphene for the removal of Congo red from aqueous solutions

Preparation, characterization, and application of a homemade graphene for the removal of Congo red from aqueous solutions

Synthesis of Graphene Oxide Nano Structures from Kerosene Soot and its Impedance Analysis

An outlook on zero-dimensional nanocarbons as components of DSSC

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