A novel reduced graphene oxide/Ag/CeO2 ternary nanocomposite: Green synthesis and catalytic properties

Ji, Zhenyuan; Shen, Xiaoping; Yang, Jinglei; Zhu, Guoxing; Chen, Kangmin

doi:10.1016/j.apcatb.2013.07.052

Cited by 130 publications

(54 citation statements)

References 68 publications

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“…During the catalysts synthesis, the material partially recovered the aromatic structure but, the size of the layers decreased and the new materials contained more defects than graphite. The ceria-containing catalysts displayed a higher I D /I G ratio compared to Ni/G and Ni/G-Na, probably as a consequence of the incorporation of ceria, which creates more flaws, as previously suggested [19]. Furthermore, the typical peaks of the F2g vibration mode of ceria and the oxygen vacancies in the ceria lattice in the range 450-550 cm -1 were observed on sample Ni-CeO 2 /G-Na (Fig.…”

Section: Characterizationsupporting

confidence: 57%

“…Several studies can be found concerning the use of GO as support [12], catalyst by its own [13,14]and as precursor of graphene (G) or reduced graphene oxide (rGO) [15]. For this latter approach, both metal/G or metal/rGO [16,17] and metal/oxide/G or metal/oxide/rGO systems [18,19,20] have also been developed. The synthesis of the metal and oxide nanoparticles can be performed before its deposition on the support, for example by colloidal methods [19], or simultaneously to the synthesis of graphene [18].…”

Section: Introductionmentioning

confidence: 99%

“…In some cases, it has been suggested that additional improvement on the catalytic performances, due to a synergism between GO and the active phase, was achieved [22]. Depending on the metal, the synthesis of the nanoparticles can be performed under mild conditions, as is the case for Ag [19], or may require the use of stronger reducing agents [17,20].…”

Section: Introductionmentioning

confidence: 99%

“…For this latter approach, both metal/G or metal/rGO [16,17] and metal/oxide/G or metal/oxide/rGO systems [18,19,20] have also been developed. The synthesis of the metal and oxide nanoparticles can be performed before its deposition on the support, for example by colloidal methods [19], or simultaneously to the synthesis of graphene [18]. The resulting material provides good nanoparticle dispersion with homogeneous distribution [21].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Promoter effect of sodium in graphene-supported Ni and Ni–CeO2 catalyst for the low-temperature WGS reaction

Dongil

Pastor‐Pérez

Sepúlveda-Escribano

et al. 2015

Applied Catalysis A: General

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Graphical abstract Highlights-Graphene-supported Ni and Ni-CeO 2 catalysts have been studied.-Metal dispersion depends on the presence of ceria and on the precipitating agent, NaOH or urea.-The graphene support strongly interacts with the ceria promoter.-The presence of sodium increases the catalytic activity, mainly in the presence of ceria. AbstractThe low temperature water-gas shift (WGS) reaction has been studied over NiCeO 2 /Graphene and Ni/Graphene. The catalysts were prepared with 5 wt% Ni and 20 wt% CeO 2 loadings, by deposition-precipitation employing sodium hydroxide and urea as precipitating agents. The materials were characterized by TEM, powder X-ray diffraction, Raman spectroscopy, H 2 -temperature-programmed reduction and X-ray photoelectron spectroscopy (XPS). The characterization and the reaction results indicated that the interaction between the active species and the support is higher than with activated carbon, and this hinders the reducibility of ceria and thus the catalytic performance. On the other hand, the presence of residual sodium in samples prepared by precipitation with NaOH facilitated the reduction of ceria. The catalytic activity was highly improved in the presence of sodium, what can be explained on the basis of an associative reaction mechanism which is favored over Ni-O-Na entities.

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Section: Characterizationsupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Promoter effect of sodium in graphene-supported Ni and Ni–CeO2 catalyst for the low-temperature WGS reaction

Dongil

Pastor‐Pérez

Sepúlveda-Escribano

et al. 2015

Applied Catalysis A: General

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“…21 Among them, silver nanoparticles (Ag NPs) are particularly attractive because of the relatively excellent performance. [22][23][24] Silver has been successfully used in the epoxidation of styrene with high selectivity on an industrial scale. The styrene epoxidation on silver nanoparticle catalysts exhibits strong size-dependent catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Silver Nanoparticles/Carbon Nanofibers via Electrospinning With Research on Their Catalytic Properties

Liu

Bai

Wang

et al. 2014

NANO

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Ag nanoparticles (Ag NPs) embedded carbon nano¯bers (CNFs) were prepared by a new route which included chemical reaction process, electrospinning and calcination technique. The morphology and structure of the composite nano¯bers were investigated by scanning electron microscopy, energy dispersive X-ray spectroscopy, transmission electron microscopy and X-ray di®raction. It indicated that Ag NPs were uniformly distributed in the CNFs. This e®ective synthesis method can be used to prepare other composite nano¯bers with functionality. The Ag NPs/CNFs that served as supported catalysts were used in the styrene epoxidation by TBHP. The Ag NPs/CNFs catalyst showed its highly catalytic activity for the epoxidation of styrene (conversion: 40.6%, SO selectivity: 35.9%). This kind of composite nano¯ber membrane was proved e®ectively catalytic activity and recycled easily in the styrene epoxidation.

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A Readily Accessible Functional Nanofibrous Membrane for High‐Capacity Immobilization of Ag Nanoparticles and Ultrafast Catalysis Application

Liu

Cheng

Kong

et al. 2018

Adv Materials Inter

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IntroductionAs one of the most prevalent noble metal materials, Ag nanoparticles (NPs) possess unique distinct heterogeneous catalytic Constructing macroscopic materials with optimal surface structure to immobilize silver nanoparticles polluted in water environment and further maximize their practical functionality still remains a great challenge. An infrequent strategy is developed to build a flexible material system combining PVA-co-PE nanofiber membrane (NFM) scaffold and mussel-inspired polydopamine (PDA), which provides a formidable surface interacting with polyethyleneimine (PEI). The resultant PEI/PDA/NFM presents an ultrahigh adsorption capacity (727.8 mg g −1 ) to citrate-capped silver nanoparticles much higher than the values reported in the literatures. The broad applicability of the multifunctional composite membranes in water treatment is further demonstrated. Interestingly, a promising concurrent performance of antibacterial, antifouling, and catalysis is acquired in bacterial filtrations. Benefiting from the structure, a plasma process further enhances the catalytic performance of AgNPs-PEI/PDA/NFM with an ultrahigh turnover frequency value: 6.65 × 10 −1 mol mol −1 min −1 , which facilitates the fast degradation treatment of p-nitrophenol (p-NP) in continuous-flow filtration. The excellent properties can be rationally assigned to the optimized surface structure synergistically determined by the high specific area of porous nanofiber scaffold and high substrate adaptability of reactive polydopamine. This implies the superiority of membranes obtained by present strategy in recycling Ag NPs contaminant and further applies it in fast-efficient wastewater treatment applications.

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A novel reduced graphene oxide/Ag/CeO2 ternary nanocomposite: Green synthesis and catalytic properties

Cited by 130 publications

References 68 publications

Promoter effect of sodium in graphene-supported Ni and Ni–CeO2 catalyst for the low-temperature WGS reaction

Promoter effect of sodium in graphene-supported Ni and Ni–CeO2 catalyst for the low-temperature WGS reaction

Preparation and Characterization of Silver Nanoparticles/Carbon Nanofibers via Electrospinning With Research on Their Catalytic Properties

A Readily Accessible Functional Nanofibrous Membrane for High‐Capacity Immobilization of Ag Nanoparticles and Ultrafast Catalysis Application

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