Preparation of 3D urchin-like RGO/ZnO and its photocatalytic activity

Li, Dandan; Yang, Luyue; Li, Chaocheng; Liu, Yuhuan; Lü, Jun; Wang, Yutang

doi:10.1007/s10854-017-6495-4

Cited by 15 publications

(12 citation statements)

References 34 publications

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“…As can be seen in Figure 7a, the typical peaks for the hexagonal wurtzite structure of ZnO (JCPDS card no. 36-1451) are identified beside the peaks corresponding to the substrate, that is, the diffraction peaks located at (100), (002), (101), (102) and (110) [37,51,52]. It can be observed that the preferred orientation towards c-axis growth increases with the cathodic potential, in agreement with the SEM images in Figures 5a and 6a [51].…”

Section: Resultssupporting

confidence: 85%

“…36-1451) are identified beside the peaks corresponding to the substrate, that is, the diffraction peaks located at (100), (002), (101), (102) and (110) [37,51,52]. It can be observed that the preferred orientation towards c-axis growth increases with the cathodic potential, in agreement with the SEM images in Figures 5a and 6a [51]. Upon the addition of GO, the ZnO/rGO hybrids presented similar diffraction peaks as the non-modified ZnO (not shown), in agreement with other reports [46].…”

Section: Resultsmentioning

confidence: 99%

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Graphene Oxide-Assisted Morphology and Structure of Electrodeposited ZnO Nanostructures

et al. 2020

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In this paper, ZnO electrodeposition was studied with the presence of graphene oxide (GO) exploited as a possible structure-directing agent. The effect of deposition potential and duration on the morphology and structure of ZnO was analyzed. The morphology and structure of the hybrids was analyzed by Raman spectroscopy, X-ray diffraction (XRD), and Scanning Electron Microscopy (SEM). The Raman results indicate a successful modification of ZnO with GO sheets and a hybridization threshold of 10 mg L−1 by the evolution of the defect related band of ZnO at 580 cm−1. The morphology results show that a low GO content only slightly influences the morphology and orientation of ZnO nanostructures while a high content as 10 mg L−1 changes the morphology in nanoplates and growth orientation to lateral. The results show that while GO participated in the deposition reaction, it has a two-fold role, also by structure-controlling ZnO, indicating that the approach is valid for the use of GO as a structure-directing agent for the fabrication of ZnO nanostructures by electrodeposition with varying morphologies and orientations.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Graphene Oxide-Assisted Morphology and Structure of Electrodeposited ZnO Nanostructures

et al. 2020

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“…As can be seen in Figure a, all MZ composites showed higher photocatalytic activity than pure ZnO in the process of RhB degradation. Furthermore, by comparing with a RGO/ZnO composite (RGO=reduced graphene oxide), the photocatalytic efficiency of MZ composites display different results (slow and then fast), which is derived from the influence of metallic phase MoS 2 and ZnS on the electron separation and transfer pathways . Figure b displays the removal efficiency of Cr VI by different photocatalysts (ZnO, MZ2, MZ4, MZ8) under 300 W Xe lamp irradiation, wherein about 40.9, 98.7, 95.4, and 84.0 % of Cr VI disappeared within 90 min, respectively.…”

Section: Resultsmentioning

confidence: 98%

“…Urchin‐like ZnO was synthesized using a modified hydrothermal method according to a previous literature . Zn(Ac) 2 ⋅ 2 H 2 O (3 mmoL) was dissolved in the DI water (30 mL) by stirring to form a uniform solution.…”

Section: Methodsmentioning

confidence: 99%

Dual II Heterojunctions Metallic Phase MoS₂/ZnS/ZnO Ternary Composite with Superior Photocatalytic Performance for Removing Contaminants

Zhao

2019

Chemistry A European J

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Fabricating a high‐performance photocatalyst to efficiently solve serious environmental problems is an urgent affair. Herein, a series of MoS2/ZnO composites were successfully fabricated through a facile hydrothermal route using Na2MoO4, (NH2)2CS and urchin‐like ZnO as precursors. According to the results of XRD and XPS, it was found that ZnS appeared in MoS2/ZnO composite; meanwhile, the content was positively correlated with the weight of the precursor (NH2)2CS. It should be noted that the morphology and the metallic phase content of MoS2 grown in situ on the surface of ZnO were affected by the molar ratio of Na2MoO4 and ZnO. Benefiting from the special dual II heterojunctions of MoS2/ZnS/ZnO ternary composite, the material exhibited excellent charge separation and transfer performances. In the photocatalytic measurements, the MoS2/ZnS/ZnO (Na2MoO4:ZnO 1:2 MZ2) composite not only exhibits excellent photocatalytic CrVI reduction activity of 42.3×10−3 min−1, but also displays remarkable adsorption performance (nearly 32.1 %) for Cr2O2-7 . In addition, the ternary composite shows dominant photocatalytic CrVI reduction activities compared to other photocatalysts. This work provides a high‐efficient MoS2/ZnS/ZnO ternary photocatalyst for environmental treatment.

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“…For example, graphene oxide presents a specific Raman band related to the graphitic structure's vibration (the G band) and a band associated with the defect degree (the D band). Traditionally, defect degree has been evaluated by the intensity ratio between these two bands [74,129,130]; however, a new metric for this purpose has been reported [131].…”

Section: Raman Spectroscopy Is a Characterization Technique To Study Nanomaterials Based On Photons' Detection Inelastically Scattered Whmentioning

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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Preparation of 3D urchin-like RGO/ZnO and its photocatalytic activity

Cited by 15 publications

References 34 publications

Graphene Oxide-Assisted Morphology and Structure of Electrodeposited ZnO Nanostructures

Graphene Oxide-Assisted Morphology and Structure of Electrodeposited ZnO Nanostructures

Dual II Heterojunctions Metallic Phase MoS₂/ZnS/ZnO Ternary Composite with Superior Photocatalytic Performance for Removing Contaminants

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

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Preparation of 3D urchin-like RGO/ZnO and its photocatalytic activity

Cited by 15 publications

References 34 publications

Graphene Oxide-Assisted Morphology and Structure of Electrodeposited ZnO Nanostructures

Graphene Oxide-Assisted Morphology and Structure of Electrodeposited ZnO Nanostructures

Dual II Heterojunctions Metallic Phase MoS2/ZnS/ZnO Ternary Composite with Superior Photocatalytic Performance for Removing Contaminants

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

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Dual II Heterojunctions Metallic Phase MoS₂/ZnS/ZnO Ternary Composite with Superior Photocatalytic Performance for Removing Contaminants