Fabrication of Au/GO/ZnO composite nanostructures with excellent photocatalytic performance

Lee, Jieun; Khoa, Nguyen Tri; Kim, Soon Wook; Kim, Eui Jung; Hahn, Sung Hong

doi:10.1016/j.matchemphys.2015.08.017

Cited by 49 publications

(10 citation statements)

References 34 publications

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“…Various researchers have reported similar results on metal oxide/rGO nanocomposites. 25,[37][38][39] In the present analysis, the emission peaks are observed to be blue shied when compared with earlier reports. 40 This might be due to the inuence of quantum connement effect in WO 3 .…”

Section: Synthesis and Characterization Of Rgo/wo 3 Nanocompositessupporting

confidence: 78%

Porous reduced graphene oxide (rGO)/WO₃ nanocomposites for the enhanced detection of NH₃ at room temperature

et al. 2019

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Section: Synthesis and Characterization Of Rgo/wo 3 Nanocompositessupporting

confidence: 78%

Porous reduced graphene oxide (rGO)/WO₃ nanocomposites for the enhanced detection of NH₃ at room temperature

et al. 2019

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“…Similarly, on other hand the electrons generated at conduction band (CB) are reactive enough to reduce the molecular oxygen. Hence, the resulting reactive radical species possesses powerful oxidizing properties which are highly effective in carrying out degradation of the dye molecules 51 . Also, the presence of graphene play dual yet pivotal role in enhancing the visible light photocatalytic activity of the ZnS-ZnO heterostructure.…”

Section: Resultsmentioning

confidence: 99%

Facile and scalable production of heterostructured ZnS-ZnO/Graphene nano-photocatalysts for environmental remediation

Lonkar

Pillai

Alhassan

2018

Sci Rep

113

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A facile and eco-friendly strategy is described for the synthesis of ZnS-ZnO/graphene heterostructured nano-photocatalysts for the first time. This solvent-free and technologically scalable method involves solid-state mixing of graphite oxide (GO), Zn salt and surfeit yet non-toxic elemental sulfur using ball-milling followed by thermal annealing. The as-formed hybrids are composed of uniformly distributed in-situ formed ZnS-ZnO nanoparticles simultaneously within the thermally reduced GO (graphene) matrix. A series of hybrid compositions with varying content of ZnS/ZnO and graphene were prepared and thoroughly characterized. Further, the effect of heterostructure composition on the photocatalytic properties was investigated under visible-light illumination. The synergistic ZnS-ZnO/graphene hybridization promoted the band-gap narrowing compared to the pristine ZnS nanoparticles. The ZnS:ZnO composition was controlled by graphite oxide under thermal treatment and observed to be a crucial factor in enhancement of photocatalytic activity. As a proof of concept, the phase optimized and surface enhanced ZnS-ZnO/graphene nano-photocatalysts was tested towards visible light driven photocatalytic degradation of environmentally harmful organic dyes and toxic phenol molecules from aqueous media. The presented cost-effective strategy provides high potential in large-scale production of heterostructured nano-photocatalysts for environmental remediation and photocatalytic greener production of hydrogen.

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“…The mechanism for MB oxidation is already described in literature and proceeds by generated OH radicals. MB degradation started by N‐demethylation, making the blue colour weaker.…”

Section: Resultsmentioning

confidence: 97%

“…Finally, at the area under 100 m/z, smaller molecules can be found after the end of the degradation, such as H 2 O, CO 2 , NO 3 -and SO 4 2À , the presence of which indicates complete MB degradation. [54] The mechanism for MB oxidation is already described in literature [54][55][56] and proceeds by generated OH radicals. MB degradation started by N-demethylation, making the blue colour weaker.…”

Section: Visible Light Photocatalytic Performance Of the Composite Momentioning

confidence: 99%

Visible Light Photocatalysts Based on Manganese Doped TiO₂ Integrated Within Monolithic Reduced Graphene Oxide/Polymer Porous Monolith

et al. 2020

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3D monolithic integrated photocatlysts were prepared by selfassembly of graphene platelets decorated with manganese doped TiO 2 nanoparticles. The self-assembly was induced by chemical reduction at mild reaction conditions. The physicochemical properties of the photocatalysts were improved by addition of polymer nanoparticles within the 3D structures. The rGO presence in the nanostructures affected their light absorption capability, which was red shifted. As a result, the band gap dropped from 3.12 eV in Mn doped TiO 2 to 2.8 eV in the monolithic composite made of rGO and TiO 2 . The photocatalysts were applied for the elimination of methylene blue (MB) from aqueous solutions, the degradation of which was monitored by the Matrix Assisted Laser Desorption Ionization Time of Flight Mass Spectrometry. It was shown that (i) MB was completely eliminated from aqueous solution; (ii) all the adsorbed MB was photocatalytically degraded under visible light, giving rise to various smaller molecules as intermediate products of degradation; and (iii) one part of the MB was completely mineralized, demonstrated by the presence of final degradation products. These results indicate that the presented materials seem to be a powerful tool in water purification process with double impact. On one hand, it will allow re-use of water and decrease of its consumption in the textile producing plants, and on the other hand, it will assure protection of the environment by elimination of the hazards.

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Fabrication of Au/GO/ZnO composite nanostructures with excellent photocatalytic performance

Cited by 49 publications

References 34 publications

Porous reduced graphene oxide (rGO)/WO₃ nanocomposites for the enhanced detection of NH₃ at room temperature

Porous reduced graphene oxide (rGO)/WO₃ nanocomposites for the enhanced detection of NH₃ at room temperature

Facile and scalable production of heterostructured ZnS-ZnO/Graphene nano-photocatalysts for environmental remediation

Visible Light Photocatalysts Based on Manganese Doped TiO₂ Integrated Within Monolithic Reduced Graphene Oxide/Polymer Porous Monolith

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Fabrication of Au/GO/ZnO composite nanostructures with excellent photocatalytic performance

Cited by 49 publications

References 34 publications

Porous reduced graphene oxide (rGO)/WO3 nanocomposites for the enhanced detection of NH3 at room temperature

Porous reduced graphene oxide (rGO)/WO3 nanocomposites for the enhanced detection of NH3 at room temperature

Facile and scalable production of heterostructured ZnS-ZnO/Graphene nano-photocatalysts for environmental remediation

Visible Light Photocatalysts Based on Manganese Doped TiO2 Integrated Within Monolithic Reduced Graphene Oxide/Polymer Porous Monolith

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Product

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Porous reduced graphene oxide (rGO)/WO₃ nanocomposites for the enhanced detection of NH₃ at room temperature

Porous reduced graphene oxide (rGO)/WO₃ nanocomposites for the enhanced detection of NH₃ at room temperature

Visible Light Photocatalysts Based on Manganese Doped TiO₂ Integrated Within Monolithic Reduced Graphene Oxide/Polymer Porous Monolith