Preparation and adsorption property of graphene oxide by using waste graphite from diamond synthesis industry

Ding, Saisai; Sun, Shiping; Xu, Hongliang; Yang, Biye; Liu, Yingying; Wang, Hailong; Chen, Deliang; Zhang, Rui

doi:10.1016/j.matchemphys.2018.09.036

Cited by 37 publications

(12 citation statements)

References 50 publications

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“…Usually, the GO surface area according to the literature data is estimated to be 200–600 m 2 ·g –1 , , and the low surface area is due to the association of the layers via hydrogen bonds. Similar results were previously obtained by Ding et al for GO obtained from the waste graphite from diamond synthesis industry.…”

supporting

confidence: 91%

Graphene Oxide of Extra High Oxidation: A Wafer for Loading Guest Molecules

Abdelhalim

Sharoyko

Ageev

et al. 2021

J. Phys. Chem. Lett.

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We present a new modification of graphene oxide with very high content (85 wt %) of oxygen-containing functional groups (hydroxy, epoxy, lactol, carboxyl, and carbonyl groups) that forms stable aqueous dispersion in up to 9 g·L–1 concentration solutions. A novel faster method of the synthesis is described that produces up to 1 kg of the material and allows controlling the particle size in solution. The synthesized compound was characterized by various physicochemical methods and molecular dynamics modeling, revealing a unique structure in the form of a multilayered wafer of several sheets thick, where each sheet is highly corrugated. The ragged structure of the sheets forms pockets with hindered mobility of water that leads to the possibility of trapping guest molecules.

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supporting

confidence: 91%

Graphene Oxide of Extra High Oxidation: A Wafer for Loading Guest Molecules

Abdelhalim

Sharoyko

Ageev

et al. 2021

J. Phys. Chem. Lett.

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“…The decolorization efficiency for both dyes was higher at higher temperatures, indicating that the removal of MB and MO was relatively favorable at high temperature. The dependence of decolorization of water-soluble MB and MO on temperature can be used to calculate the value of ΔH0, ΔS0 and ΔG0, using the following Equations [61]:ΔG0=−RTLnKc, LnKc=ΔS°R−ΔH°RT, ΔG0=ΔH0−TΔS0, where ΔG0 is the standard Gibbs free energy changes (KJ·mol −1 ·K −1 ), T is the absolute temperature (K), R is the universal gas constant (KJ·mol −1 ·K −1 ), and Kc is equilibrium constant defined as:Kc=CaCe.…”

Section: Resultsmentioning

confidence: 99%

Functional Chitosan Derivative and Chitin as Decolorization Materials for Methylene Blue and Methyl Orange from Aqueous Solution

et al. 2019

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Dyes are classified as one of the major pollutants of water. They have negative impacts not only on environment but also on human health. In fact, wastewater that contains these harmful substances requires many types of treatments. Therefore, alternative methods and adsorption agents are needed. Herein, we propose to evaluate the decolorization of methylene blue (MB) and methyl orange (MO) as two models of soluble dyes from water using chitin and chitosan-graft-polyacrylamide. Furthermore, the applicability of these biomacromolecules as alternative adsorption agents, their sticking probability and desorption were also examined. Experimental parameters such as dye concentration, contact time, pH solution, adsorbent dosage and temperature were thoroughly examined for the grafted chitosan and chitin. The activation energy (Ea) and the thermodynamic variables (i.e., standard Gibb’s free energy (ΔG0), standard enthalpy (ΔH0), and standard entropy (ΔS0)) were determined using the Van’t Hoff and Arrhenius equations. The sticking probability (S*) model for MB and MO removal by chitin and the chitosan derivative demonstrated that both dyes were successfully removed under the proposed conditions. Desorption studies of MB and MO showed the reusability of both materials, suggesting their application for removing dyes from aqueous solution.

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“…GO was synthesized first by natural graphite powder via a modified Hummer’s method ( Hummers and Offeman, 1958 ; Ding et al, 2019 ). In brief, 5 g graphite was uniformly dispersed in 300 ml of concentrated H 2 SO 4 in a round-bottom flask, stirring for 5 min.…”

Section: Methodsmentioning

confidence: 99%

Preparation and Characterization of Reduced Graphene Oxide /TiO2 Blended Polyphenylene sulfone Antifouling Composite Membrane With Improved Photocatalytic Degradation Performance

et al. 2021

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Nanosized titanium oxide (TiO2)-based photocatalysts have exhibited great potential for the degradation of organic contaminants, while their weak absorption of visible light limits the photocatalytic efficiency. Herein, a novel reduced graphene oxide/TiO2-polyphenylenesulfone (rGO/TiO2-PPSU) hybrid ultrafiltration membrane has been successfully prepared via a non-solvent induced phase-separation method, in which the synergistic coupling between the rGO and TiO2 could endowed the fabricated membranes with visible-light-driven efficient photocatalytically degradation of organic pollutants and outstanding photocatalytic and antifouling properties. Compared with the PPSU membranes prepared with Graphene oxide and TiO2, respectively, the rGO/TiO2-PPSU membrane demonstrated significant photodegradation towards phenazopyridine hydrochloride (PhP) solution under ultraviolet light (improved about 71 and 43%) and visible light (improved about 153 and 103%). The permeability and flux recovery rates of the membrane indicated that the high flux of the rGO/TiO2-PPSU membrane can be greatly restored after fouling, due to the improved self-cleaning properties under visible light static irradiation. With the properties of high performance of photocatalytic degradation and good self-cleaning ability, the rGO/TiO2-PPSU membrane would have great potential in water treatment.

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Preparation and adsorption property of graphene oxide by using waste graphite from diamond synthesis industry

Cited by 37 publications

References 50 publications

Graphene Oxide of Extra High Oxidation: A Wafer for Loading Guest Molecules

Graphene Oxide of Extra High Oxidation: A Wafer for Loading Guest Molecules

Functional Chitosan Derivative and Chitin as Decolorization Materials for Methylene Blue and Methyl Orange from Aqueous Solution

Preparation and Characterization of Reduced Graphene Oxide /TiO2 Blended Polyphenylene sulfone Antifouling Composite Membrane With Improved Photocatalytic Degradation Performance

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