Structure, Mechanical and Electrochemical Properties of Thermally Reduced Graphene Oxide-poly (Vinyl Alcohol) Foams

Wang, Wenxiu; Xu, Hui; Chen, Jian; Shen, Yingqiang; Bertóti, I.; Guo, Xinli; Shi, Xiaoyan; Elsiddig, Zuhair Agab

doi:10.3311/ppch.11148

Cited by 6 publications

(5 citation statements)

References 43 publications

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“…In addition, I D /I G values of GO+PVA composites annealed at three different temperatures were calculated to be about 0.83, where I D /I G are integrated intensity ratio of the D band to that of the G band. This value is a little lower than that obtained from GO's I D /I G value, 0.93, due to thermal annealing [37].…”

Section: Resultscontrasting

confidence: 65%

Resistive switching behaviour of multi-stacked PVA/graphene oxide + PVA composite/PVA insulating layer-based RRAM devices

Kim

et al. 2019

Semicond. Sci. Technol.

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In this study, we have investigated the resistive switching behavior of multi-stacked PVA/ GO+PVA composite/PVA insulating layer-based RRAM (resistive random-access memory) as the annealing temperature of the insulating layer was varied between 100 °C, 150 °C, and 200 °C. The fabricated RRAM device with a multi-stacked insulating layer annealed at 200 °C showed relatively good switching properties with a high on/off ratio (∼10 4 ) and low V SET (3.5±0.29 V) and V RESET (−1.81±0.10 V), which were uniformly distributed over 100 DC sweep cycles. In terms of reliability, multi-stacked insulating layer-based RRAM devices exhibited good retention (>2×10 3 s) and DC sweep endurance (>80) due to the enhanced stability of the insulating layer by good dispersion and the thermal treatment. The conduction mechanisms of the device at low resistance state (LRS) and high resistance state (HRS) were analyzed through Ohmic conduction LRS and Poole-Frenkel emission of HRS, respectively. In addition, we demonstrated the filamentary switching mechanism of resistive switching in our proposed devices.

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Section: Resultscontrasting

confidence: 65%

Resistive switching behaviour of multi-stacked PVA/graphene oxide + PVA composite/PVA insulating layer-based RRAM devices

Kim

et al. 2019

Semicond. Sci. Technol.

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“…The uv irradiated membrane that possessed the best performance was then modified using a pva coating [22]. PVA solutions were prepared at concentrations of 1, 3, and 5 % by weight.…”

Section: Modification Of the Membranementioning

confidence: 99%

Improving the Performance of Polysulfone-nano ZnO Membranes for Water Treatment in Oil Refinery with Modified UV Irradiation and Polyvinyl Alcohol

Hidayah

Kusworo

Susanto

2021

Period. Polytech. Chem. Eng.

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Refinery wastewater is generated from the process of refining large amounts of oil. Oil refined wastewater contains micron-scaled emulsion droplets, and sub-micron droplets that are difficult to remove from water, which poses problems for researchers. Membrane technology is widely used in water treatment because it is very selective and effective in the filtration process. This research focuses on oil refinery water treatment using polysulfone (PSF) membrane ZnO nano composites modified with ultraviolet (UV) irradiation and polyvinyl alcohol. This membrane was prepared using the dry / wet phase inversion method. Then-the membrane was modified using UV irradiation and coated with polyvinyl alcohol (PVA). PSF-nano ZnO modifications have an impact on membrane performance; UV irradiation showed an increase in the value of membrane pure water flux from 4.5 Lm–2h–1 to 5.7 Lm–2h–1. However, after UV irradiation, the rejection value decreased after UV irradiation, whereas the presence of PVA as a coating agent increased the rejection value to 77.2 % for Total Dissolve Solid (TDS) rejection, 76 % for Chemical Oxyugen Demand COD rejection, and 65.3 % for ammonia rejection. This value was higher than that obtained for membranes without PVA coating, namely only 47.3 % for TDS, 51.1 % for (COD), and 29.4 % for ammonia rejection. Modifications with UV and PVA irradiation provide interrelated effects to improve membrane performance.

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“…Graphene is a two-dimensional (2D) sheet-like material with sp 2 hybridized carbon atoms configured in a hexagonal structure and its thickness is equivalent to an atom diameter [10,11]. Along with its derivatives, graphene oxide (GO) and reduced graphene oxide (rGO), graphene materials have been deeply studied and applied in various fields due to the presence of aromatic rings, free π-π electron and reactive functional groups [12,13].…”

Section: Graphene Derivates and Virus Interactionmentioning

confidence: 99%

Viewpoint: How the Graphene Could Help to Decrease SARS-CoV-2 Spread?

Ruíz-Santoyo

Romero-Toledo

Andrade-Espinoza

et al. 2021

Period. Polytech. Chem. Eng.

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The COVID-19 (Coronavirus Disease 2019), caused by the SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2) began in December 2019 in Wuhan, China. Until February 2021, there are 110 million of infected people, 60 million have recovered and approximately 2.5 million have passed away worldwide according to WHO. The coronavirus pandemic is evolving very rapidly and represents a risk for health care workers and society in general. Moreover, pandemic has tested the limits of health systems by raising questions about forms of prevention, management of infections with conventional therapies and the use of diagnostic tools. In this article we discussed the possible role of the nanostructured-graphene based materials as aid tools for preventing the spread and infection of SARS-CoV-2. In this regard, nanotechnology could take part in the fight against the spread of future diseases caused by deadly viruses. However, its use should be well founded in terms of biocompatibility. Therefore, we have proposed an approach based on graphene nanomaterials as possible allies for the fight against the COVID-19 spread based on the physicochemical features that present these novel nanomaterials.

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Structure, Mechanical and Electrochemical Properties of Thermally Reduced Graphene Oxide-poly (Vinyl Alcohol) Foams

Abstract: Graphene oxide foams with a wide range of poly (vinyl alcohol)

Cited by 6 publications

References 43 publications

Resistive switching behaviour of multi-stacked PVA/graphene oxide + PVA composite/PVA insulating layer-based RRAM devices

Resistive switching behaviour of multi-stacked PVA/graphene oxide + PVA composite/PVA insulating layer-based RRAM devices

Improving the Performance of Polysulfone-nano ZnO Membranes for Water Treatment in Oil Refinery with Modified UV Irradiation and Polyvinyl Alcohol

Viewpoint: How the Graphene Could Help to Decrease SARS-CoV-2 Spread?

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