Production and properties of top-down and bottom-up graphene oxide

Poniatowska, Aleksandra; Trzaskowski, Maciej; Ciach, Tomasz

doi:10.1016/j.colsurfa.2018.10.049

Cited by 26 publications

(13 citation statements)

References 38 publications

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“…Therefore to improve permeability and ion selectivity defects or functional groups must be generated designedly. Nanoporous graphene can be fabricated either by electrochemical modification of pristine graphene or by growth on supports from different chemical reactions [128]. The most commonly applied techniques to generate nanosized pores on graphene structure include high-temperature oxidation, ultraviolet (UV) ozone treatment and plasma etching [129,130,131].…”

Section: Reverse Osmosis and Nanofiltration Membranesmentioning

confidence: 99%

A Review on Reverse Osmosis and Nanofiltration Membranes for Water Purification

et al. 2019

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Sustainable and affordable supply of clean, safe, and adequate water is one of the most challenging issues facing the world. Membrane separation technology is one of the most cost-effective and widely applied technologies for water purification. Polymeric membranes such as cellulose-based (CA) membranes and thin-film composite (TFC) membranes have dominated the industry since 1980. Although further development of polymeric membranes for better performance is laborious, the research findings and sustained progress in inorganic membrane development have grown fast and solve some remaining problems. In addition to conventional ceramic metal oxide membranes, membranes prepared by graphene oxide (GO), carbon nanotubes (CNTs), and mixed matrix materials (MMMs) have attracted enormous attention due to their desirable properties such as tunable pore structure, excellent chemical, mechanical, and thermal tolerance, good salt rejection and/or high water permeability. This review provides insight into synthesis approaches and structural properties of recent reverse osmosis (RO) and nanofiltration (NF) membranes which are used to retain dissolved species such as heavy metals, electrolytes, and inorganic salts in various aqueous solutions. A specific focus has been placed on introducing and comparing water purification performance of different classes of polymeric and ceramic membranes in related water treatment industries. Furthermore, the development challenges and research opportunities of organic and inorganic membranes are discussed and the further perspectives are analyzed.

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Section: Reverse Osmosis and Nanofiltration Membranesmentioning

confidence: 99%

A Review on Reverse Osmosis and Nanofiltration Membranes for Water Purification

et al. 2019

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“…Los espectros FTIR GO sintetizados muestran señales a 2900 cm -1 , 1700 cm -1 , 1650 cm -1 1400 cm -1 , las cuales están Figura 1. Procedimiento experimental para la preparación de óxido de grafeno adherido a las placas de grafito pirolítico por el método de spray coating ácido asociadas a los enlaces C-OH, C=O, -COOH y C-O-C.Las señales anchas alrededor de 3500 provienen de grupos hidroxilos (9) .…”

Section: Análisis Ftir Del Hopgunclassified

“…El plano basal del grafito se compone de un arreglo en forma de panal de átomos de carbono (7) . La oxidación del grafito produce óxido de grafeno (8) , que incluso puede contener hasta un 20-25% de oxígeno en su peso (9) . La oxidación química de grafito implica la generación de oxígeno que contiene grupos -OH, C=O, en la superficie del grafeno y -COOH en los bordes.…”

Section: Introductionunclassified

“…En la revisión de la literatura para funcionalizar el material, los autores siguen el procedimiento de sumergir el material en ácido sulfúrico (H2SO4) y acido nítrico (HNO3) (10) , según estos autores insertan grupos carboxílicos (-COOH), hidroxilos (-OH) y carbonilos (-C=O) (11) , modificando las propiedades de la superficie. Existen diversos métodos para la funcionalización del grafito, dentro de los más conocidos se tienen: El método de Hummer (1958) donde el grafito es oxidado por KMnO4/NaNO3/H2SO4 (2,9,12,13) . El método de oxidación del grafito a varios niveles donde Brodie y Staudenmaier utilizaron una combinación de clorato de potasio (KClO3) y ácido nítrico (HNO3) (11,14) , métodos electroquímicos (15) , método de Mercano donde se mezcla (H2SO4/H3PO4) (16) , método de Osorio donde combina (H2SO4/HNO3/HCl) (17) .…”

Section: Introductionunclassified

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Método de funcionalización química para la obtención de óxido de grafeno adherido a la superficie de placas de grafito pirolítica de alta densidad por spray coating ácido

Camargo-Amado

Sevilla-Abarca

2021

inycomp

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En los últimos años el óxido de grafeno ha sido motivo de estudio debido a sus propiedades electrónicas, magnéticas, térmicas y mecánicas. Este estudio presenta dos métodos diferentes de funcionalización química para la obtención óxidos de grafeno (GO) adheridos a una superficie de grafito pirolítico de alta densidad (HOPG) por spray coating ácido. Para el rociado en el primer método, se utilizaron dos ácidos fuertes (H2SO4 y HNO3). En el segundo método de rociado, se utilizaron tres ácidos fuertes (H2SO4/HNO3/HCl). Para los dos casos el intervalo de rociado fue de 2, 4 y 6 horas. Se caracterizaron las placas de HOPG mediante análisis de SEM–EDS, FTIR. Se pudo determinar la presencia de óxido de grafeno en la superficie de la placa. Este método demuestra la capacidad de funcionalizar la superficie del (HOPG), rompiendo su estructura sp2 y formando defectos donde se encuentran los grupos funcionales característicos del GO.

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“…However, some of these methods need a precise substrate substance. An assessment summarizes modern chemical procedures . Supplementary advanced concepts that have been lately projected include dismantling of Carbon Nanotubes (CNTs) …”

Section: Amalgamation Of Graphenementioning

confidence: 99%

Electrochemical Sensors and Biosensors Based on Graphene Functionalized with Metal Oxide Nanostructures for Healthcare Applications

et al. 2019

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Graphene has attracted wide consideration in recent years to the assembly of sensitive sensors and biosensors due to its unique and remarkable physical and electrochemical properties. Moreover, graphene, as an essential two‐dimensional carbon material with remarkably high quartz and electronic superiority, has also received significant research attention. This review presents the different synthesis techniques of graphene; graphene functionalized based electrochemical sensors and biosensors for various health care appellations. Further, were discussed on the basis of enhanced catalytic activity, improved detection limit in conjunction with sensitivity, and selectivity. Synergistic action of graphene and metal oxide nanostructure has contributed towards high activity as a biosensing material. The results with different sensors and biosensors for the detection of significant biomarkers such as protein sensor, electrochemical immune sensor, phytochrome sensor, cholesterol biosensor glucose, hydrogen peroxide, and nicotinamide adenine dinucleotide detection sensor etc., and highlighted the use of graphene and functionalized graphene in different sensing platforms. Finally, the challenges related to less aggregated graphene‐based electrochemical sensors and biosensors as well as future research directions are discussed.

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Production and properties of top-down and bottom-up graphene oxide

Cited by 26 publications

References 38 publications

A Review on Reverse Osmosis and Nanofiltration Membranes for Water Purification

A Review on Reverse Osmosis and Nanofiltration Membranes for Water Purification

Método de funcionalización química para la obtención de óxido de grafeno adherido a la superficie de placas de grafito pirolítica de alta densidad por spray coating ácido

Electrochemical Sensors and Biosensors Based on Graphene Functionalized with Metal Oxide Nanostructures for Healthcare Applications

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