Physical properties and enhanced photocatalytic activity of ZnO-rGO nanocomposites

Sengunthar, Poornima; Bhavsar, K. H.; Balasubramanian, C.; Joshi, U. S.

doi:10.1007/s00339-020-03753-6

Cited by 45 publications

(25 citation statements)

References 42 publications

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“…An energy-dispersive spectrometer can measure the intensity and energy of the X-rays emitted from the sample. The energy of the emitted X-rays de- On the other side, studies of chemical composition are useful to identify different phases in composite characterization, in particular, to identify the presence of ZnO in ZnO-graphene composites [112,116,122,123]. For example, an eco-friendly and solar light-responsive graphene oxide wrapped zinc oxide nanohybrid was synthesized by a hydrothermal method using lemon and honey as chelating and complexing agents, respectively [123].…”

Section: Energy Dispersive X-ray (Edx)mentioning

confidence: 99%

Synthesis, Characterization, and Photocatalytic Performance of ZnO–Graphene Nanocomposites: A Review

et al. 2020

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ZnO is an exciting material for photocatalysis applications due to its high activity, easy accessibility of raw materials, low production costs, and nontoxic. Several ZnO nano and microstructures can be obtained, such as nanoparticles, nanorods, micro flowers, microspheres, among others, depending on the preparation method and conditions. ZnO is a wide bandgap semiconductor presenting massive recombination of the generated charge carriers, limiting its photocatalytic efficiency and stability. It is common to mix it with metal, metal oxide, sulfides, polymers, and nanocarbon-based materials to improve its photocatalytic behavior. Therefore, ZnO–nanocarbon composites formation has been a viable alternative that leads to new, more active, and stable photocatalytic systems. Mainly, graphene is a well-known two-dimensional material, which could be an excellent candidate to hybridize with ZnO due to its excellent physical and chemical properties (e.g., high specific surface area, optical transmittance, and thermal conductivity, among others). This review analyses ZnO–graphene nanocomposites’ recent advances, addressing the synthesis methods and the resulting structural, morphological, optical, and electronic properties. Moreover, we examine the ZnO–graphene composites’ role in the photocatalytic degradation of organic/inorganic pollutants.

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Section: Energy Dispersive X-ray (Edx)mentioning

confidence: 99%

Synthesis, Characterization, and Photocatalytic Performance of ZnO–Graphene Nanocomposites: A Review

et al. 2020

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“…Recently, a combination of reduced graphene oxide (RGO) with a semiconductor is considered to be an effective method. − RGO with an excellent electron-transport property could be utilized as an electron reservoir, as well as an electron-transport mediator, which is beneficial to the transport of photoinduced electrons and retard the charge recombination . For the synthesis of RGO–ZnO composites, graphene oxide (GO) is generally utilized as a precursor.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical ZnO Nanosheet-Reduced Graphene Oxide Composites for Photocatalytic Ethylene Oxidation

Huang

Lin

et al. 2021

ACS Appl. Nano Mater.

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Hierarchical ZnO nanosheet-reduced graphene oxide (RGO) nanocomposites were prepared via a simple onestep process under ambient conditions. The resultant ZnO−RGO nanocomposites are composed of highly branched ZnO nanosheets with RGO sheet decoration. It is found that GO precursors could modulate the branched structure of ZnO nanosheets effectively. The shape of hierarchical ZnO nanosheets is effectively tuned by controlling the weight ratio of GO during the synthesis. The ZnO− RGO composites exhibit good photocatalytic performance for ethylene oxidation under simulated sunlight illumination. The photocatalytic oxidation performance of ZnO−RGO photocatalysts could be further enhanced by optimizing the mass ratio of GO to 2%, which showed excellent stability as well. The mineralization rate of ethylene is ∼100% in this reaction. The detailed characterization revealed that the enhanced photo-oxidation performance was attributed to the intimate contact between RGO nanosheets and ZnO nanoparticles, which played important roles in increasing light absorption intensity and promoting the separation and migration of the photoinduced charge carriers.

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“…The high efficiency is also due to the high light absorption capacity of the SnO 2 -rGO NCs. [73][74][75] A kinetics study revealed that the SnO 2 NPs and SnO 2 -rGO NCs follow second-order and first-order kinetic models in the degradation of the MB dye, which was confirmed by the rate constant values (k), as presented in Fig. 11(c and d).…”

Section: Resultsmentioning

confidence: 60%

Hydrothermal synthesis of an SnO₂–rGO nanocomposite using tea extract as a reducing agent for daylight-driven photocatalyst and supercapacitors

et al. 2023

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Physical properties and enhanced photocatalytic activity of ZnO-rGO nanocomposites

Cited by 45 publications

References 42 publications

Synthesis, Characterization, and Photocatalytic Performance of ZnO–Graphene Nanocomposites: A Review

Synthesis, Characterization, and Photocatalytic Performance of ZnO–Graphene Nanocomposites: A Review

Hierarchical ZnO Nanosheet-Reduced Graphene Oxide Composites for Photocatalytic Ethylene Oxidation

Hydrothermal synthesis of an SnO₂–rGO nanocomposite using tea extract as a reducing agent for daylight-driven photocatalyst and supercapacitors

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Physical properties and enhanced photocatalytic activity of ZnO-rGO nanocomposites

Cited by 45 publications

References 42 publications

Synthesis, Characterization, and Photocatalytic Performance of ZnO–Graphene Nanocomposites: A Review

Synthesis, Characterization, and Photocatalytic Performance of ZnO–Graphene Nanocomposites: A Review

Hierarchical ZnO Nanosheet-Reduced Graphene Oxide Composites for Photocatalytic Ethylene Oxidation

Hydrothermal synthesis of an SnO2–rGO nanocomposite using tea extract as a reducing agent for daylight-driven photocatalyst and supercapacitors

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Hydrothermal synthesis of an SnO₂–rGO nanocomposite using tea extract as a reducing agent for daylight-driven photocatalyst and supercapacitors