One-step fabrication of highly dispersed Ag nanoparticles decorated N-doped reduced graphene oxide heterogeneous nanostructure for the catalytic reduction of 4-nitrophenol

Han, Xing-Wei; Bi, Shaodan; Zhang, Weiqiang; Yang, Zhengwei

doi:10.1016/j.colsurfa.2019.04.066

Cited by 19 publications

(5 citation statements)

References 40 publications

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“…The splitting doublet between the two peaks was 6 eV, indicating that Ag was in the metallic state. 60,61 The XPS results have adequately proven the multiheteroatom-doping of the carbon materials, which were in agreement with those of other characterizations. The heteroatoms present in the carbon materials could remarkably increase the active sites and improve the charge accumulation and ions transport for energy storage.…”

Section: ■ Results and Discussionsupporting

confidence: 87%

Multi-Heteroatom-Doped Carbon Materials for Solid-State Hybrid Supercapacitors with a Superhigh Cycling Performance

et al. 2020

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For the purpose of assembling high-performance solid-state hybrid supercapacitors (HSCs) with superior cycling stability and energy density, biomass-derived multi-heteroatom-doped carbon materials were prepared in this work and utilized as negative electrodes for the supercapacitors. The applied biomass in this study included orange peel and egg white; besides, we also prepared Ag-doped egg white as a precursor through a denaturation reaction to synthesize a Ag-nanoparticle-decorated carbon material; the consequently obtained carbon materials were referred to as OC, EC, and Ag–EC, respectively. The as-synthesized heteroatom-doped carbon materials displayed excellent electrochemical performance. The specific capacitance retentions were 101.7, 105.4, and 107.4% for OC, EC, and Ag–EC, respectively, after 50 000 cycles. In addition, a core–shell structured C/N–CoO@CoO/NiO nanomaterial was also synthesized and used as the positive electrode, which exhibited a high cycling stability of 111.6% after cycling for 50 000 times. The three corresponding solid-state hybrid supercapacitors (HSCs) possessed excellent energy densities of 33.1, 30.1, and 35.6 Wh kg–1 at about 850.0 W kg–1, respectively. After cycling for 50 000 times, their specific capacitance retentions were 145.9, 139.2, and 140.0%, respectively.

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Section: ■ Results and Discussionsupporting

confidence: 87%

Multi-Heteroatom-Doped Carbon Materials for Solid-State Hybrid Supercapacitors with a Superhigh Cycling Performance

et al. 2020

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“…B. Zeynizadeh and S. Karami employed hydrazine hydrate as a reducing agent and compared it with NaBH 4 by using Ni nanoparticles as a catalyst immobilized on cellulose. Other reducing agents, such as aluminum amalgam, need to be explored. − Third, only a few mechanisms are available for 4-nitrophenol reduction. However, there is no clear mechanism with either zeolites or zeolite/rGO composite. − Recently, SnO 2 was found to be an efficient catalyst in the reduction of 4-nitrophenol.…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

Section: Challenges and Perspectivesmentioning

confidence: 99%

Future Perspectives on Zeolite/Graphene Oxide Composite Synthesis and Applications

Subramanian,

Perumal,

Mangesh

et al. 2023

Energy Fuels

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Graphene research continues to advance into many territories, and in this study, an exhaustive analysis of the fabrication and performance of zeolite/graphene composites is attempted for the first time. Apart from zeolite/graphene applications, the potential of graphene composites with other materials has been presented. Future perspectives and challenges have been presented extensively to enable researchers to explore the synergy of graphene composites for various unexplored applications. Carbon atoms are arranged in a two-dimensional plate-like pattern to produce the hexagonal network-shaped material known as graphene, which has a material thickness of one atom. Zeolites are frequently employed widely as heterogeneous catalysts in a variety of chemical industries due to their enormous surface area and constant pore size. Recently, scientists have worked to better understand how graphene and zeolite work together as a composite catalyst. The removal of dyes, the adsorption of heavy metal ions, electrochemical capacitors and sensors, oil purification, microbial fuel cells, and reverse osmosis membranes were among the potential uses for zeolite/graphene oxide composites that were investigated in earlier studies. The aforementioned applications show how versatile zeolite/graphene oxide composites are. In addition to summarizing earlier studies on the techniques for synthesizing graphene with common zeolites, this study has also taken historical data to demonstrate improvements in the use of zeolite/graphene composites in diverse industrial applications. There is, nevertheless, a lot of potential for the study of zeolite/graphene composites because the bulk of applications use zeolites and graphene oxide as distinct components. Again, this study has explored the composite potential of graphene with other materials in energy storage, fuel cracking and adsorption applications. This study provides a comprehensive review of the synergistic benefits of graphene composites and its future opportunities and challenges.

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“…Currently, noble metal catalysts based on Pt, Pd, Ag, and Au have been widely employed in the catalytic process of organic pollutants [12][13][14][15][16][17]. However, their increasing price and limited availability restrict their application.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Reduced-Graphene-Oxide-Supported CoPt and Ag Nanoparticles for the Catalytic Reduction of 4-Nitrophenol

et al. 2021

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Composite nanostructure materials are widely used in catalysis. They exhibit several characteristics, such as the unique structural advantage and the synergism among their components, which significantly enhances their catalytic performance. In this work, CoPt nanoparticles and reduced-graphene-oxide-based nanocomposite catalysts (rGO/CoPt, rGO/CoPt/Ag) were prepared by using a facile co-reduction strategy. The crystalline structure, morphology, composition, and optical characteristics of the CoPt nanoparticles, rGO/CoPt nanocomposite, and rGO/CoPt/Ag nanocomposite catalysts were investigated by a set of techniques. The ID/IG value of the rGO/CoPt/Ag nanocomposite is 1.158, higher than that of rGO/CoPt (1.042). The kinetic apparent rate constant, k, of the rGO/CoPt/Ag nanocomposite against 4-nitrophenol (4-NP) reduction is 5.306 min−1, which is higher than that of CoPt (0.495 min−1) and rGO/CoPt (1.283 min−1). The normalized rate constant, knor, of the rGO/CoPt/Ag nanocomposite is 56.76 min−1mg−1, which is higher than some other catalytic materials. The rGO/CoPt/Ag nanocomposite shows a significantly enhanced catalytic performance when compared to CoPt nanoparticles and the rGO/CoPt nanocomposite, which may confirm that the novel rGO/CoPt/Ag nanocomposite is a promising catalyst for the application of catalytic fields.

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One-step fabrication of highly dispersed Ag nanoparticles decorated N-doped reduced graphene oxide heterogeneous nanostructure for the catalytic reduction of 4-nitrophenol

Cited by 19 publications

References 40 publications

Multi-Heteroatom-Doped Carbon Materials for Solid-State Hybrid Supercapacitors with a Superhigh Cycling Performance

Multi-Heteroatom-Doped Carbon Materials for Solid-State Hybrid Supercapacitors with a Superhigh Cycling Performance

Future Perspectives on Zeolite/Graphene Oxide Composite Synthesis and Applications

Preparation of Reduced-Graphene-Oxide-Supported CoPt and Ag Nanoparticles for the Catalytic Reduction of 4-Nitrophenol

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