In situ green synthesis of Ag nanoparticles on graphene oxide/TiO2 nanocomposite and their catalytic activity for the reduction of 4-nitrophenol, congo red and methylene blue

Nasrollahzadeh, Mahmoud; Atarod, Monireh; Jaleh, Babak; Gandomirouzbahani, Mastaneh

doi:10.1016/j.ceramint.2016.02.088

Cited by 171 publications

(51 citation statements)

References 55 publications

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“…These results also verify the accepted mechanisms for 4‐NP and MB reduction with Ag nanoparticles in the presence of NaBH 4 . Ag nanoparticles which serve as a transmitter, receive electrons from nucleophilic BH 4 − ions and donate them to electrophilic 4‐NP/MB . However, contributions of the structure of graphene and N‐doping highly contribute to catalytic activity.…”

Section: Resultsmentioning

confidence: 99%

“…Although metallic nanoparticles have high catalytic activity, their applications are hindered by their scarcity and high‐cost . Additionally, their tendency to agglomerate in the absence of a stabilizing support material restricts catalytic applications . Agglomeration can be avoided by synthesizing a composite material consisting metal nanoparticles and support, besides reducing the amount of metal used and increasing the catalytic activity .…”

Section: Introductionmentioning

confidence: 99%

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One‐step hydrothermal synthesis of nitrogen doped reduced graphene oxide‐silver nanocomposites: Catalytic performance

Soysal

Çıplak

Gökalp

et al. 2020

Applied Organom Chemis

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The aim of this study is to efficiently utilize catalytic properties of silver nanoparticles and nitrogen doped graphene and their combined synergistic effect. For this purpose, nitrogen doped reduced graphene oxide‐silver (NrGO‐Ag) nanocomposites were synthesized by a facile, environmentally friendly, one‐pot hydrothermal method for the first time and characterized by UV–Vis, FTIR, XRD, XPS, SEM, and TEM. Catalytic activity of the synthesized nanocomposites was tested against 4‐nitrophenol (4‐NP) and methylene blue (MB) reduction reactions in the presence of NaBH4. Total degradation was achieved in both reactions in 210 and 44 s, and pseudo first order reaction rate constants were calculated as 0.0071 and 0.0322 s−1 for 4‐NP and MB reduction reactions, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

One‐step hydrothermal synthesis of nitrogen doped reduced graphene oxide‐silver nanocomposites: Catalytic performance

Soysal

Çıplak

Gökalp

et al. 2020

Applied Organom Chemis

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“…Because Haruta et al found the preparation method of highly active gold nanoparticle catalyst on the active support surface in 1987, a large number, extensive and in‐depth of researches about nanoscale gold catalysts were published in the next 230 years . In recent years, with the consciousness improvement in energy crisis and environmental protection, there is more attention paid to energy, chemical industry, and environmental problems . Since we found that gold catalysts exhibited catalytic activity to CO oxidation at a low temperature, the applications of gold catalysts to solve energy and environmental problems have appeared substantially .…”

Section: Introductionmentioning

confidence: 90%

Structure‐activity relationship of supported Au catalysts with high catalytic activity by modifying the inactive supports

Wang

Huo

et al. 2018

Surface & Interface Analysis

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Three supported Au catalysts have been prepared by the deposition‐precipitation method by using the active carbon (AC), SiO2‐AC, and SiO2‐AC‐hollowed. The 3 supports were characterized by Brunauer‐Emmett‐Teller and scanning electron microscopy. Meanwhile, the supported Au nanoparticles were also characterized in detail by X‐ray powder diffraction, transmission electron microscopy, H2‐TRP, and X‐ray photoelectron spectroscopy, and their catalytic activity and stability in CO oxidation was evaluated. The results demonstrated that Au supported on SiO2‐AC‐hollowed exhibited much higher catalytic activity with acceptable stability for 72 hours than the other 2. We attributed to finer supported Au nanoparticles with abundant low‐coordinated Au atoms on the surfaces of hollowed supports with large special surface area and abundant pore structure. In summary, we successfully found an efficient and cheap method to prepare catalysts with high catalytic activity and acceptable stability by modifying the inactive supports.

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“…The use of plant extracts as reducing agents will effectively reduce the environmental pollution, production cost and produces biocompatible materials. Literature has witnessed the synthesis of graphene and its composites according to the green chemistry point of view using eco‐friendly reagents such as L‐ascorbic acid, L–Lysine, glucose, tea polyphenols, mortino berry extract, Fenugreek seeds extract, E. Helioscopia L. Leaf extract, E. Bungei Bioss, W. Coagulans leaf extract, barberry fruit extract, etc …”

Section: Introductionmentioning

confidence: 99%

A Facile Green Reduction for Graphene‐Silver Nanocomposite Using Betel Leaf Extract for the Photocatalytic Degradation of Water Pollutants

2017

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Green leaves are utilized in the green synthesis of various nanomaterials as these are rich sources of various biomolecules useful to control the growth of nanoparticles and as reducing agents. In this report, the in situ synthesis of a nanocomposite of silver decorated on reduced graphene oxide sheets using betel leaf extract as stabilizing and reducing agent is presented. The formation of nanocomposite is confirmed by Ultraviolet‐Visible, Fourier Transform Infrared and Raman spectroscopic techniques. The X‐Ray Diffraction results revealed the Face Centered Cubic structure of silver nanoparticles (Ag NPs) with a particle size of 28 nm. The sheet structure of reduced graphene oxide and uniformly distributed Ag NPs on these sheets is confirmed by High Resolution Scanning Electron Microscope analysis. The obtained nanocomposite exhibited good photocatalytic efficiency (95% in 2 h) against a model pollutant, methylene blue in sun light.

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In situ green synthesis of Ag nanoparticles on graphene oxide/TiO2 nanocomposite and their catalytic activity for the reduction of 4-nitrophenol, congo red and methylene blue

Cited by 171 publications

References 55 publications

One‐step hydrothermal synthesis of nitrogen doped reduced graphene oxide‐silver nanocomposites: Catalytic performance

One‐step hydrothermal synthesis of nitrogen doped reduced graphene oxide‐silver nanocomposites: Catalytic performance

Structure‐activity relationship of supported Au catalysts with high catalytic activity by modifying the inactive supports

A Facile Green Reduction for Graphene‐Silver Nanocomposite Using Betel Leaf Extract for the Photocatalytic Degradation of Water Pollutants

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