Tailored synthesis of active reduced graphene oxides from waste graphite: Structural defects and pollutant-dependent reactive radicals in aqueous organics decontamination

Wang, Yuxian; Chen, Lulu; Chen, Chunmao; Duan, Xiaoguang; Xie, Yongbing; Song, Wenli; Sun, Hongqi; Wang, Shaobin

doi:10.1016/j.apcatb.2018.02.010

Cited by 159 publications

(92 citation statements)

References 65 publications

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“…For further investigation, electron spin resonance (ESR) spectra (Fig. 2f) were applied to investigate the oxygen vacancies in Ni 3 Se 2 /NF and NOF [32][33][34][35]. The high intensity in the ESR spectrum represents high concentration of oxygen vacancies [32].…”

Section: Resultsmentioning

confidence: 99%

Pt embedded Ni3Se2@NiOOH core-shell dendrite-like nanoarrays on nickel as bifunctional electrocatalysts for overall water splitting

et al. 2019

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Developing high-performance bifunctional catalysts toward hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is essential to enhance water splitting efficiency for large-scale hydrogen production. Neither noble metal Pt nor transition metal compounds show satisfactory performances for both HER and OER simultaneously. Here, we prepared a three-dimensional Pt-Ni 3 Se 2 @ NiOOH/NF (PNOF) hybrid catalyst via in-situ growth strategy. Benefitting from the self-supported structure and oxygen vacancies on the surface of NiOOH nanosheets, the PNOF electrode shows remarkably catalytic performance for dual HER and OER. The overall water electrolyzer using PNOF as anode and cathode can achieve a current density of 10 mA cm −2 at a low voltage of 1.52 V with excellent long-term stability, which is superior to precious metal catalysts of Pt/C and Ir/C. This study provides a promising strategy for preparing bifunctional catalysts with high performance.

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Section: Resultsmentioning

confidence: 99%

Pt embedded Ni3Se2@NiOOH core-shell dendrite-like nanoarrays on nickel as bifunctional electrocatalysts for overall water splitting

et al. 2019

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“…Wang et al [164] prepared reduced graphene oxide (rGO) and used it for the catalytic ozonation of organic pollutants due to the higher defective level of rGO. Ozone molecules could decompose into active oxygen species on the structural vacancies and edges of rGO.…”

Section: Carbon Materialsmentioning

confidence: 99%

Application of Heterogeneous Catalytic Ozonation for Refractory Organics in Wastewater

et al. 2019

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Catalytic ozonation is believed to belong to advanced oxidation processes (AOPs). Over the past decades, heterogeneous catalytic ozonation has received remarkable attention as an effective process for the degradation of refractory organics in wastewater, which can overcome some disadvantages of ozonation alone. Metal oxides, metals, and metal oxides supported on oxides, minerals modified with metals, and carbon materials are widely used as catalysts in heterogeneous catalytic ozonation processes due to their excellent catalytic ability. An understanding of the application can provide theoretical support for selecting suitable catalysts aimed at different kinds of wastewater to obtain higher pollutant removal efficiency. Therefore, the main objective of this review article is to provide a summary of the accomplishments concerning catalytic ozonation to point to the major directions for choosing the catalysts in catalytic ozonation in the future.

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“…The morphology and size of graphene-based materials used in catalytic ozonation have been assessed mainly by straightforward electron microscopy techniques including both SEM and TEM. These methods allow to distinguish between the silk-like structure of GO, the exfoliated rGO, and the multilayer structure of nOG [60,64,73]. Furthermore, the number and thickness of layers in exfoliated structures have been determined by AFM in some instances [61,73].…”

Section: Methods Used For the Characterization Of Graphene-based Cmentioning

confidence: 99%

“…As mentioned above, GO and rGO are the metal-free graphene-based materials most used in catalytic ozonation processes [58,59,60,61]. The most widely applied method to prepare GO from graphite is based on the Hummers method (i.e., strong oxidation of graphite with KMnO 4 in sulfuric acid) [62], usually with some improvements to avoid the release of toxic gases [63].…”

Section: Synthesis Of Graphene-based Catalysts For Ozonation Procementioning

confidence: 99%

“…The most widely applied method to prepare GO from graphite is based on the Hummers method (i.e., strong oxidation of graphite with KMnO 4 in sulfuric acid) [62], usually with some improvements to avoid the release of toxic gases [63]. Typically, commercial graphite or another graphite-containing material (e.g., spent lithium-ion batteries [60]) is mixed with concentrated H 2 SO 4 (95% wt.) in an ice bath.…”

Section: Synthesis Of Graphene-based Catalysts For Ozonation Procementioning

confidence: 99%

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Graphene-Based Catalysts for Ozone Processes to Decontaminate Water

2019

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The use of graphene-based materials as catalysts in both ozone and ozone/radiation processes is creating interest among researchers devoted to the study of advanced oxidation processes (AOPs) for the degradation of organic pollutants in water. In this review, detailed explanations of catalytic and photocatalytic ozonation processes mediated by graphene-based materials are presented, focusing on aspects related to the preparation and characterization of catalysts, the nature of the water pollutants treated, the type of reactors and radiation sources applied, the influence of the main operating variables, catalyst activity and stability, and kinetics and mechanisms.

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Tailored synthesis of active reduced graphene oxides from waste graphite: Structural defects and pollutant-dependent reactive radicals in aqueous organics decontamination

Cited by 159 publications

References 65 publications

Pt embedded Ni3Se2@NiOOH core-shell dendrite-like nanoarrays on nickel as bifunctional electrocatalysts for overall water splitting

Pt embedded Ni3Se2@NiOOH core-shell dendrite-like nanoarrays on nickel as bifunctional electrocatalysts for overall water splitting

Application of Heterogeneous Catalytic Ozonation for Refractory Organics in Wastewater

Graphene-Based Catalysts for Ozone Processes to Decontaminate Water

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