Measuring Synthesis Yield in Graphene Oxide Synthesis by Modified Hummers Method

Frankberg, Erkka J.; George, Lijo; Efimov, Alexander; Honkanen, Mari; Pessi, Jenni; Levänen, Erkki

doi:10.1080/1536383x.2014.993754

Cited by 28 publications

(5 citation statements)

References 14 publications

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“…The main advantages of the reported method is does not produce the toxic gas i. e. NO 2 and N 2 O 4 , simplifies the wastewater disposal and hence it decreases the cost of production. Frankberg et al . synthesized graphene oxide using modified Hummer's methods from graphite powder.…”

Section: Preparations and Properties Of Graphene And Graphene – Basedmentioning

confidence: 99%

Graphene and Graphene‐Based Composites: A Rising Star in Water Purification ‐ A Comprehensive Overview

et al. 2016

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Graphene is an interesting two-dimensional carbon sheet possessing single-layered atom thickness that confers unique physical and chemical properties. The pristine graphene sheets have some limited applications in water purification, but the modification of graphene into the graphene composite by the incorporation of some functional groups or nanoparticles on the surface extensively increases its environmental applications. Recently, graphene nanocomposites have found to show very promising applications in all types of water purification. The present review highlights the recent developments in the applications of graphene and graphene-based composites as adsorbent, catalyst, photocatalyst, electrocatalyst, photoelectrocatalyst, and disinfection and desalination agent in comprehensive water purification systems. We primarily focus on the environmental engineering applications of graphene nanocomposites as sorbent materials for the elimination of toxic inorganic (cationic and anionic), organic, and mixed/multiple pollutants, and as catalysts for the degradation of toxic organic contaminants using catalytic oxidation, photocatalytic oxidation, electrocatalytic oxidation, and photoelectrocatalytic oxidation. We have also discussed the use and feasibility of graphene nanocomposites in water disinfection and desalination. Finally, the future challenges and perspectives are discussed.

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Section: Preparations and Properties Of Graphene And Graphene – Basedmentioning

confidence: 99%

Graphene and Graphene‐Based Composites: A Rising Star in Water Purification ‐ A Comprehensive Overview

et al. 2016

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“…The GO dispersion had a pH ~ 6.5 and the achieved concentration 117 ± 10 mg/mL was higher than the yield achieved by Jasim et al (2016) and Ali-Boucetta et al (2013) although lower than Frankberg et al (2015). This variation depends on the source of graphite used to synthesise GO (Jasim et al 2016) and oxidation time (Huang et al 2011).…”

Section: Resultsmentioning

confidence: 54%

Antibacterial effect of graphene oxide (GO) nano-particles against Pseudomonas putida biofilm of variable age

Fallatah

Elhaneid

Ali‐Boucetta

et al. 2019

Environ Sci Pollut Res

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Graphene oxide (GO) has been reported to possess antibacterial activity; therefore, its accumulation in the environment could affect microbial communities such as biofilms. The susceptibility of biofilms to antimicrobials is known to depend on the stage of biofilm maturity. The aim of this study was to investigate the effect of GO nano-particles on Pseudomonas putida KT2440 biofilm of variable age. FT-IR, UV-vis, and Raman spectroscopy confirmed the oxidation of graphene while XPS confirmed the high purity of the synthesised GO over 6 months. Biofilms varying in maturity (24, 48, and 72 h) were formed using a CDC reactor and were treated with GO (85 μg/mL or 8.5 μg/mL). The viability of P. putida was monitored by culture on media and the bacterial membrane integrity was assessed using flow cytometry. P. putida cells were observed using confocal microscopy and SEM. The results showed that GO significantly reduced the viability of 48-h biofilm and detached biofilm cells associated with membrane damage while the viability was not affected in 24- and 72-h biofilms and detached biofilm cells. The results showed that susceptibility of P. putida biofilm to GO varied according to age which may be due to changes in the physiological state of cells during maturation. Graphical abstract Electronic supplementary material The online version of this article (10.1007/s11356-019-05688-9) contains supplementary material, which is available to authorized users.

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“…The obtained GO suspension was further centrifuged at 8000 r min −1 , during which GO can be further exfoliated in water and GO suspension was divided into three layers. 25 The supernatant was removed and the sediment was allowed to disperse in DI water followed by centrifuged. This process was repeated for several cycles and the interlayer GO slurry was collected.…”

Section: Methodsmentioning

confidence: 99%

Silica/GO hybrids reinforced NR: Better interface interaction and dynamic behavior

Liu

Shang

Yang

et al. 2019

Journal of Elastomers & Plastics

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With silica firstly modified by 3-aminopropyl-triethoxysilane (APES), graphene oxide (GO) was prepared by modified Hummer’s method. APES-silica/GO (AsGO) hybrids were fabricated through hydrogen bond to reduce the polarity of silica and GO and increase the compatibility between natural rubber (NR) and AsGO. Subsequently, AsGO was incorporated into NR latex. The interaction between GO and silica in AsGO was characterized by X-ray diffraction, Raman, and Zeta potential. It was confirmed by transmission electron microscopy that the silica was uniformly dispersed on the surface of the GO. The filler–rubber interfacial interaction was thoroughly investigated. The amount of constrained region was quantified through differential scanning calorimetry results, and it showed that the high volume fraction of constrained region is responsible for the strong interfacial interaction. Besides, the mechanical performance, dynamic property, and electrical and thermal conductivity of NR-AsG x were studied. The results showed that the overall performance of NR-AsG x has an optimum value when the GO loading is 1.5 phr, which is due to the good filler dispersion and strong interface interaction.

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Measuring Synthesis Yield in Graphene Oxide Synthesis by Modified Hummers Method

Cited by 28 publications

References 14 publications

Graphene and Graphene‐Based Composites: A Rising Star in Water Purification ‐ A Comprehensive Overview

Graphene and Graphene‐Based Composites: A Rising Star in Water Purification ‐ A Comprehensive Overview

Antibacterial effect of graphene oxide (GO) nano-particles against Pseudomonas putida biofilm of variable age

Silica/GO hybrids reinforced NR: Better interface interaction and dynamic behavior

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