Hydrothermal synthesis of graphene oxide-modified zinc oxide nanoplate composites with enhanced photocatalytic activity for degradation of rhodamine B under visible light

Tanwar, Sanju; Sharma, Aditi; Mathur, Dhirendra

doi:10.1007/s00339-022-05468-2

Cited by 6 publications

(5 citation statements)

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“…Based on the observed XRD spectrum, it can be inferred that the ZnO nanoflakes are crystalline, and the GO layers are incorporated in the composite. This observation is consistent with some studies in the literature 46,47 …”

Section: Resultssupporting

confidence: 94%

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Investigating the synergistic effect of ZnO/GO nanocomposite films for methylene blue removal

Yildirim,

Canpolat,

Aydogan

et al. 2024

J Am Ceram Soc.

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This study aims to reveal the growth kinetics of ZnO nanoflakes and ZnO/GO nanocomposite films obtained at different Zn precursor salt concentrations by electrochemical deposition method and to evaluate the catalytic performances of the obtained films. The films were grown on FTO substrate with Zn precursor salt concentrations of 0.1 M, 0.125 M, and 0.175 M. Characterization of the obtained films was performed by XRD, SEM, UV–vis–NIR, Raman, and XPS analyses. The strong photocatalytic capabilities of the synthesized ZnO nanoflakes and ZnO/GO nanocomposite films were demonstrated by comparative analyses with the existing literature. Accordingly, photocatalytic experiments carried out under UVA irradiation revealed the high performance of the synthesized samples in the degradation of MB dye. The reaction kinetics were investigated using the Langmuir‐Hinshelwood kinetic model, resulting in high kobs values and R2 coefficients. ZnO nanoparticles showed a kobs of 0.038 min−1 and an R2 value of 0.96, while ZnO/GO nanocomposite films showed a kobs of 0.055 min−1 and an R2 value of 0.92. The significant increase in the degradation percentage shows the significant improvement achieved by the integration of GO, despite a slightly lower R2 value for the ZnO/GO nanocomposite film compared with ZnO nanoflakes films.

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Section: Resultssupporting

confidence: 94%

“…This observation is consistent with some studies in the literature. 46,47 The surface morphologies of the samples were examined using scanning electron microscopy, and the obtained images are presented in Figure 3. It is evident that the thickness of the obtained nanoflakes increases with the concentration of the zinc precursor salt.…”

Section: Resultsmentioning

confidence: 99%

Investigating the synergistic effect of ZnO/GO nanocomposite films for methylene blue removal

Yildirim,

Canpolat,

Aydogan

et al. 2024

J Am Ceram Soc.

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“…Furthermore, by moving electrons from ZnO to GO, which is a good electron acceptor, GO sheets prevent the recombination of photogenerated electron-hole pairs. [46,48] In the future, the role of machine learning and HOMO and LUMO will be discussed in detail. [49][50][51][52][53] In addition, photons collected by the GO-ZnO nanocomposites excited electrons from the valence band to the conduction band, leaving holes in the valence band.…”

Section: Mechanism Of Dye Degradationmentioning

confidence: 99%

“…Various researchers have represented various morphologies of GO/ZnO nanocomposites, for example, Tanwar et al chemically synthesized zinc oxide nanoplates composites with GO via using facile and cost effective strategy by hydrothermal approach. [ 46 ]…”

Section: Characterizationsmentioning

confidence: 99%

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Recent advances in morphologically controlled synthesis of graphene oxide‐based nanocomposite as catalyst and fuel additive

Shahbaz

Jamil

Bibi

et al. 2022

J of Physical Organic Chem

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Nanocomposites become very important because of their reduce size (1–100 nm), large surface area, excellent optical magnetic, and electrical and mechanical properties. In many applications, graphene oxide‐based metallic nanocomposites emerged as an outstanding class of nanomaterials that are used for different applications. (GO‐ZnO) nanocomposite has gained more importance in recent years. The present research study is designed to synthesize nanocomposites and aims to monitor its characteristics and applications. Graphene oxide is synthesized by Hummers' method. Metal salts are used as precursor source of respective metal oxides. Wet chemical synthesis method such as solvothermal/hydrothermal and copreciptation processes is used because of its low cost and easy applications as compared with other processes used in the past, which have been costly and difficult to handle. Scanning electron microscopy (SEM) and X‐ray diffraction (XRD) techniques are used to discriminate GO‐Zinc oxide metallic nanocomposites. XRD is used to investigate the crystal structure, and SEM images showed that the synthesized GO/ZnO nanocomposites is irregular in shape with merged surfaces and the size is 100 nm−1 μm. The dark and light color shows hollow morphology of the nanocomposites, and particles are merged with each other and irregular in shape. The obtained data are statistically analyzed by using regression analysis for the further interpretations. VESTA, MATCH, Origin pro is used for the interpretation of XRD results of synthesized nanocomposites. Applications of metallic (GO/Zn) nanocomposite as catalytic activity and colorimetry, flash point, fire point, cloud point, pour point, specific gravity, and viscosity and for the degradation of Drimarene Red K‐4BL is performed.

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Effective photocatalytic degradation of rhodamine B dye by nickel ferrite/(N,S)graphene oxide

Man,

Hoan,

Vinh

et al. 2024

J Mater Sci: Mater Electron

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Hydrothermal synthesis of graphene oxide-modified zinc oxide nanoplate composites with enhanced photocatalytic activity for degradation of rhodamine B under visible light

Cited by 6 publications

References 50 publications

Investigating the synergistic effect of ZnO/GO nanocomposite films for methylene blue removal

Investigating the synergistic effect of ZnO/GO nanocomposite films for methylene blue removal

Recent advances in morphologically controlled synthesis of graphene oxide‐based nanocomposite as catalyst and fuel additive

Effective photocatalytic degradation of rhodamine B dye by nickel ferrite/(N,S)graphene oxide

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