Production of novel carbon nanostructures by electrochemical reduction of polychlorinated organic rings under mild conditions for supercapacitors

2021 ◽  
Author(s):  
Züleyha Kudaş ◽  
Emir Çepni ◽  
Emre Gür ◽  
Duygu Ekinci
Keyword(s):  
Carbon Source ◽  
Electrochemical Reduction ◽  
Electrochemical Method ◽  
Carbon Nanostructures ◽  
Electrochemical Growth ◽  
Mild Conditions ◽  
One Step ◽  
The One ◽  
Carbon Based

Here, new carbon-based nanostructures were prepared by the one-step electrochemical method using hexagonal and pentagonal polychlorinated organic rings as carbon source. The electrochemical growth of carbon nanostructures on substrates was...

Study of Antioxidant Property of the Rhizome Extract of Polygonatum cirrhifolium (Mahameda) and its use in the green synthesis of Gold nanoparticles

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Braja Gopal Bag ◽  
Shib Shankar Dash ◽  
Anup Mandal
Keyword(s):  
Gold Nanoparticles ◽  
Green Synthesis ◽  
Room Temperature ◽  
Chemical Constituents ◽  
Antioxidant Property ◽  
Dpph Radical ◽  
Mild Conditions ◽  
One Step ◽  
The One

The antioxidant efficacy of the rhizome extract of Polygonatum cirrhifolium (Mahameda) has been studied against a stable 2, 2-diphenylpicrylhydrazyl (DPPH) radical at room temperature. The chemical constituents present in the rhizome extract have been utilized for the one step synthesis of stable gold nanoparticles at room temperature under very mild conditions.

One step conversion of waste polyethylene to Cr3C2 nanorods and Cr2AlC particles under mild conditions

2018 ◽  
Vol 5 (11) ◽  
pp. 2893-2897 ◽  
Author(s):  
Liangbiao Wang ◽  
Weicheng Dai ◽  
Kailong Zhang ◽  
Tao Mei ◽  
Haoyun Zhuang ◽  
...  
Keyword(s):  
Carbon Source ◽  
Mild Conditions ◽  
One Step ◽  
Waste Polyethylene

Carbides (Cr3C2 and Cr2AlC) have been synthesized by using waste PE as a carbon source in an autoclave under mild conditions.

Diameter-Selective Solubilization of Carbon Nanotubes by Lipid Micelles

2008 ◽  
Vol 8 (1) ◽  
pp. 420-423 ◽  
Author(s):  
Dimitrios Tasis ◽  
Konstantinos Papagelis ◽  
Dionysios Douroumis ◽  
James R. Smith ◽  
Nikolaos Bouropoulos ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanostructures ◽  
Aqueous Suspension ◽  
Aqueous Media ◽  
Microscopy Imaging ◽  
Force Microscopy ◽  
Atomic Force ◽  
One Step ◽  
The One ◽  
Walled Carbon Nanotubes

The one-step dispersion of HiPco single-walled carbon nanotubes in aqueous media with the use of a synthetic lyso-phosphatidylcholine was studied. Solubilization occurs through wrapping of lipid molecules around the circumference of the tubes, yielding lipid monolayers on the graphitic sidewalls as evidenced by atomic force microscopy imaging and dynamic light scattering measurements. Raman spectroscopy showed that the dispersion and centrifugation process leads to an effective enrichment of the stable aqueous suspension in carbon nanostructures with smaller diameters.

Recoverable Microparticle-Supported Metal Nanocatalysts

2019 ◽  
Author(s):  
Arthur Bonfá Fernandes ◽  
Mariia V. Pavliuk ◽  
Cristina Paun ◽  
Alexandrina C. Carvalho ◽  
Cassiana S. Nomura ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Metal Oxide Nanoparticles ◽  
Catalytic Performance ◽  
Chemical Transformations ◽  
Flow Conditions ◽  
Facile Synthesis ◽  
Mild Conditions ◽  
One Step ◽  
The One ◽  
Supported Metal

Metal nanoparticles have been widely exploited in catalysis, but their full impact on the environment and human health is still under debate. Here we describe the one-step fabrication of polymer microbead-supported metal and metal oxide nanoparticles and their application as recoverable nanocatalysts for reactions under batch and flow conditions. Au, Ag and Fe<sub>3</sub>O<sub>4</sub> nanoparticles were prepared directly at the surface of benzylamine-coated spherical polymer beads in water by using low energy microwave radiation. The morphology and size of the nanoparticles, and therefore their catalytic properties, were tuned by modifying the bead surface using betalamic acid, an antioxidant from plant origin. The catalytic performance and recovery of these environmentally friendly nanocatalysts was demonstrated towards model redox chemical transformations. We anticipate the results reported herein can provide important insights into the controlled and facile synthesis of microparticle supported nanocatalysts under mild conditions.

Hydrodeoxygenation of sulfoxides into sulfides under mild conditions over a heterogeneous cobalt catalyst

2021 ◽  
Author(s):  
Yanxin Wang ◽  
Kaiyue Yao ◽  
Duan-Jian Tao ◽  
Nian Xiang ◽  
Wei Wang ◽  
...  
Keyword(s):  
Cobalt Catalyst ◽  
Cobalt Catalysts ◽  
Nitrogen Doped ◽  
Mild Conditions ◽  
One Step ◽  
Supported Cobalt Catalysts ◽  
The One ◽  
Nitrogen Doped Carbon

In this study, the Al2O3/nitrogen-doped carbon supported cobalt catalysts (Co-NC/Al2O3-T, where T represents the pyrolysis temperatures) were successfully prepared by the one-step pyrolysis step and studied for the hydrodeoxygenation of...

Sulfuryl Fluoride Promoted Thiocyanation of Alcohols: A Practical Method for Preparing Thiocyanates

Synlett ◽  
2020 ◽  
Vol 31 (14) ◽  
pp. 1413-1417
Author(s):  
Chengrong Ding ◽  
Guofu Zhang ◽  
Lidi Xuan ◽  
Yiyong Zhao
Keyword(s):  
Ethyl Acetate ◽  
Functional Group ◽  
High Efficiency ◽  
Bond Cleavage ◽  
Ammonium Thiocyanate ◽  
Practical Method ◽  
Sulfuryl Fluoride ◽  
Mild Conditions ◽  
One Step ◽  
The One

A novel SO2F2-promoted thiocyanation method for the one-step synthesis of thiocyanates through C–O bond cleavage of readily available alcohols with ammonium thiocyanate as the thiocyanating agent was developed. The method avoids the use of additional catalyst, and a variety of (hetero)arene, alkene and aliphatic alcohols reacted with high efficiency in ethyl acetate under mild conditions to afford the corresponding thiocyanates in excellent to quantitative yields with broad functional-group compatibility.

scholarly journals One Step Synthesis of Tetragonal-CuBi2O4/Amorphous-BiFeO3 Heterojunction with Improved Charge Separation and Enhanced Photocatalytic Properties

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1514
Author(s):  
Fang Cai ◽  
Ting Zhang ◽  
Qiong Liu ◽  
Pengran Guo ◽  
Yongqian Lei ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Solvothermal Method ◽  
Removal Rate ◽  
Cost Effective ◽  
Mild Conditions ◽  
Methylene Orange ◽  
Post Annealing ◽  
One Step ◽  
The One

Tetragonal CuBi2O4/amorphous BiFeO3 (T-CBO/A-BFO) composites are prepared via a one-step solvothermal method at mild conditions. The T-CBO/A-BFO composites show expanded visible light absorption, suppressed charge recombination, and consequently improved photocatalytic activity than T-CBO or A-BFO alone. The T-CBO/A-BFO with an optimal T-CBO to A-BFO ratio of 1:1 demonstrates the lowest photoluminescence signal and highest photocatalytic activity. It shows a removal rate of 78.3% for the photodegradation of methylene orange under visible light irradiation for 1 h. XPS test after the cycle test revealed the reduction of Bi3+ during the photocatalytic reaction. Moreover, the as prepared T-CBO/A-BFO show fundamentally higher photocatalytic activity than their calcinated counterparts. The one-step synthesis is completed within 30 min and does not require post annealing process, which may be easily applied for the fast and cost-effective preparation of photoactive metal oxide heterojunctions.

Recoverable Microparticle-Supported Metal Nanocatalysts

2019 ◽  
Author(s):  
Arthur Bonfá Fernandes ◽  
Mariia V. Pavliuk ◽  
Cristina Paun ◽  
Alexandrina C. Carvalho ◽  
Cassiana S. Nomura ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Metal Oxide Nanoparticles ◽  
Catalytic Performance ◽  
Chemical Transformations ◽  
Flow Conditions ◽  
Facile Synthesis ◽  
Mild Conditions ◽  
One Step ◽  
The One ◽  
Supported Metal

Metal nanoparticles have been widely exploited in catalysis, but their full impact on the environment and human health is still under debate. Here we describe the one-step fabrication of polymer microbead-supported metal and metal oxide nanoparticles and their application as recoverable nanocatalysts for reactions under batch and flow conditions. Au, Ag and Fe<sub>3</sub>O<sub>4</sub> nanoparticles were prepared directly at the surface of benzylamine-coated spherical polymer beads in water by using low energy microwave radiation. The morphology and size of the nanoparticles, and therefore their catalytic properties, were tuned by modifying the bead surface using betalamic acid, an antioxidant from plant origin. The catalytic performance and recovery of these environmentally friendly nanocatalysts was demonstrated towards model redox chemical transformations. We anticipate the results reported herein can provide important insights into the controlled and facile synthesis of microparticle supported nanocatalysts under mild conditions.

scholarly journals Silica-coated magnetite nanoparticles prepared by the one-step electrochemical method for dye removal

2018 ◽  
Vol 1 (1) ◽  
pp. 1-11
Author(s):  
Heru Setyawan ◽  
◽  
Widiyastuti Widiyastuti ◽  
Mahmudi Mahmudi ◽  
Memik Dian Pusfitasari
Keyword(s):  
Methylene Blue ◽  
Magnetite Nanoparticles ◽  
Electrochemical Method ◽  
Dye Removal ◽  
Sodium Silicate Solution ◽  
Silicate Solution ◽  
Slight Reduction ◽  
One Step ◽  
Percentage Removal ◽  
The One

In this paper, the synthesis of silica-coated magnetite nanoparticles using a one-step electrochemical method and their application for dye removal are presented. In this method, pure iron in a dilute aqueous sodium silicate solution that served as a silica precursor was electro-oxidized. The silica-coated magnetite nanoparticles produced by this method is nearly spherical with the size of approximately 10 nm and follows the spinel structure of Fe3O4. The silica-coated magnetite nanoparticles exhibit nearly superparamagnetic properties and excellent performance to remove methylene blue from wastewater. The adsorption capacity of the nanoparticles was approximately 24.2 mg methylene blue/g adsorbent, which was much higher than that of pure magnetite nanoparticles (1.1 mg methylene blue/g adsorbent). Also, the percentage removal was higher than 90% with the initial concentration of methylene blue up to 40 mg/L. It can be regenerated and reused with an only slight reduction in percentage removal.

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