Cold RF oxygen plasma treatment of graphene oxide films

El-Hossary, F.M.; Ghitas, Ahmed; El-Rahman, A. M. Abd; Ebnalwaled, A. A.; Shahat, M. Abdelhamid; Fawey, Mohammed H.

doi:10.1007/s10854-021-06123-x

Cited by 13 publications

(5 citation statements)

References 69 publications

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“…However, two primary processes [8] can occur during plasma treatment, the addition of new polar groups or an increase in hydroxyl groups, which cause reduced contact angles following oxygen plasma treatment, and the etching process, which causes the opposite effect (higher CA values). As a result, an increase in hydroxyl groups [28] on the polymer surface, as indicated in XPS, can explain the significant decrease in contact angle value seen on PVA films after oxygen plasma treatment. This suggests that plasma treatment of PVA thin films can improve their surface wettability.…”

Section: Contact Anglementioning

confidence: 97%

“…Figure 4b illustrates the increase in the adhesion work of the PVA film from 129.5 to 136.13 and 140.5 mN/m by increasing the processing time from 0 to 20 s with a constant pressure of 26 mbar at two different flow rates 2 L/min, 6 L/min. Figure 5b shows that the adhesion work of the PVA film is increased from 129.5 to 138.13 and 140.5 mN/m by increasing the processing time from 0 to 20 s with a constant flow rates 6 L/min at two different pressures 16 mbar and 26 mbar [28].…”

Section: Contact Anglementioning

confidence: 99%

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Microwave plasma discharge-assisted surface modification of PVA films: coatings and food packaging

2022

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In this study, polyvinyl alcohol (PVA) film was treated with low-cost microwave oven oxygen plasma. A number of several types of microscopies, including scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy (XPS), contact angle and work of adhesion, were utilized in order to investigate the impact that the plasma had on the PVA film. After plasma treatment, it was discovered that the contact angle had decreased from 39° ± 0.4 to 20.8° ± 0.2, which suggests that the surface property had changed to a hydrophilic state due to increased hydroxyl groups (C=O, O=C–O) according to our finding from the results of XPS. The increase in surface roughness was observed. Recent research suggests that the properties of PVA can be modified by adjusting the degree of oxidation, which could lead to new improvements in applications based on PVA. This could pave the way for food packaging, air-conditioner panels, and coating applications.

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Section: Contact Anglementioning

confidence: 97%

Section: Contact Anglementioning

confidence: 99%

Microwave plasma discharge-assisted surface modification of PVA films: coatings and food packaging

2022

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“…While the morphology of the material can easily be altered for better surface area and large pore sizes, the result is usually an amorphous carbon material. The chemical structure of carbon can be modified by both physical and chemical methods [12,13]. It has been proven that functional groups can significantly improve the electrochemical properties of the carbon material [14].…”

Section: Introductionmentioning

confidence: 99%

Carbon-Based Materials and Their Applications in Sensing by Electrochemical Voltammetry

Nguyen

Lee

2023

Inorganics

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In recent years, society has paid great attention to health care and environmental safety. Thus, research on advanced sensors for detecting substances that can harm health and the environment has been developed rapidly. Another popular target for detection techniques is disease-expressing materials that can be collected from body fluids. Carbon, which has outstanding electrochemical properties, can come from a variety of sources and has many morphological shapes, is nevertheless an environmentally friendly material. While carbon nanomaterial has become one of the most common targets for high-tech development, electrochemical voltammetry has proven to be an effective measurement method. Herein, the paper proposes a currently developed carbon nanomaterial along with research on a modified carbon material. Moreover, four common voltammetry methods and related works are also introduced.

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“…They include solar fuel production [4,5], water splitting [6,7], photo-degradation and catalysis of other compound responses in polluted water [8,9]. The TiO 2 , ZnO, GO, rGO, WO 3 , GaN and C 3 N 4 are well IOP Publishing doi:10.1088/1757-899X/1269/1/012010 2 36th Eg-MRS International Conference, 24-25 September 2022, Cairo, Egypt recognized as binary metal oxide photocatalysts [10][11][12][13][14]. BiO X (X = Cl, Br and I), Bi 2 WO 6 , BiVO 4 , ZnWO 4 , Ag 3 PO 4 and Fe 2 O 3 have been also used as ternary photocatalytic compounds [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

ZnO Nanoparticles for Photocatalytic Methyl Orange Degradation: Hydrothermal Synthesis, Characterization, and Optimization

Shahat

Ghitas

El-Hossary

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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This study investigates the production of zinc oxide nanoparticles (ZnO NPs) utilizing an efficient and surfactant-free hydrothermal method for use as a photocatalytic agent in the purification of organic polluted water. The structural features, optical properties and photocatalytic performance of ZnO NPs have been investigated. XRD, SEM, HR-TEM, FTIR and UV–vis absorption spectroscopy were used as analytical and characterization techniques. The ZnO NPs prepared with hexagonal structure and interesting applied properties was obtained by adjusting the processing time at a low treatment temperature of 75 °C. The crystallite size and energy band gap are reaction time-dependent, which in turn affects the photocatalytic performance. ZnO NPs under UV irradiation show an efficiency of 93% in the photocatalytic decomposition of methyl orange (MO) dye. The value of ZnO NPs bandgap (3.38 eV) is suitable for allowing UV light absorption and rapid generation of charge carriers; creating photooxidation reactions for decomposing the organic dye.

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Cold RF oxygen plasma treatment of graphene oxide films

Cited by 13 publications

References 69 publications

Microwave plasma discharge-assisted surface modification of PVA films: coatings and food packaging

Microwave plasma discharge-assisted surface modification of PVA films: coatings and food packaging

Carbon-Based Materials and Their Applications in Sensing by Electrochemical Voltammetry

ZnO Nanoparticles for Photocatalytic Methyl Orange Degradation: Hydrothermal Synthesis, Characterization, and Optimization

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