Microwave-induced electric discharges on metal particles for the synthesis of inorganic nanomaterials under solvent-free conditions

Microwave irradiation of metals generates electric discharges (arcs). These arcs are used to generate nanoparticles of Cu and Ni and one-dimensional nanorods of CuS, ZnF2, and NiF2 protected with fluorinated amorphous carbon. We have also synthesized reduced graphene oxide and partially rolled graphene by this method.

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Microwave induced electric discharges on metal particles for the synthesis of zero-, one- and two-dimensional inorganic nanomaterials under solvent-free conditions

10.3762/bxiv.2020.14.v1 ◽

2020 ◽

Author(s):

Vijay Tripathi ◽

Harit Kumar ◽

Anubhav Agarwal ◽

Leela Srinivas Panchakarla

Keyword(s):

Graphene Oxide ◽

Microwave Irradiation ◽

Metal Particles ◽

Electric Discharges ◽

Two Dimensional ◽

Metallic Nanoparticle ◽

One Dimensional ◽

Solvent Free Conditions ◽

Reduced Graphene ◽

Inorganic Nanomaterials

Microwave irradiation of metals generates electric discharges (sparks). These sparks are used to generate metallic nanoparticle of Cu and Ni and one-dimensional nanorods of CuS, ZnF2, and NiF2 protected with fluorinated amorphous carbon. We have also synthesized reduced graphene oxide and graphene partially rolled into scrolls by this method.

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Synthesis and Study of Reduced Graphene Oxide layers under Microwave Irradiation

Materials Today Proceedings ◽

10.1016/j.matpr.2017.11.585 ◽

2018 ◽

Vol 5 (2) ◽

pp. 3403-3410 ◽

Cited By ~ 3

Author(s):

D. Sreedhar ◽

Sandhya Devireddy ◽

Vasudeva Rao Veeredhi

Keyword(s):

Graphene Oxide ◽

Microwave Irradiation ◽

Reduced Graphene Oxide ◽

Oxide Layers ◽

Reduced Graphene

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Preparation of reduced Graphene Oxide (rGO) assisted by microwave irradiation and hydrothermal for reduction methods

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/434/1/012079 ◽

2018 ◽

Vol 434 ◽

pp. 012079

Author(s):

S Setiadji ◽

B W Nuryadin ◽

H Ramadhan ◽

C D D Sundari ◽

T Sudiarti ◽

...

Keyword(s):

Graphene Oxide ◽

Microwave Irradiation ◽

Reduced Graphene Oxide ◽

Reduced Graphene ◽

Reduction Methods

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Synthesis, Characterization, and Properties of Few-layer Metal Dichalcogenides and their Nanocomposites with Noble Metal Particles, Polyaniline, and Reduced Graphene Oxide

Zeitschrift für anorganische und allgemeine Chemie ◽

10.1002/zaac.201200283 ◽

2012 ◽

Vol 638 (15) ◽

pp. 2617-2624 ◽

Cited By ~ 32

Author(s):

H. S. S. Ramakrishna Matte ◽

Urmimala Maitra ◽

Prashant Kumar ◽

Bolla Govinda Rao ◽

K. Pramoda ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Noble Metal ◽

Metal Particles ◽

Reduced Graphene ◽

Metal Dichalcogenides

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Construction of three-dimensional/one-dimensional heterostructure of flower-like Sr nanoflowers on Se microrods decorated on reduced graphene oxide: an efficient electrocatalyst for oxidation of promethazine hydrochloride

Materials Today Chemistry ◽

10.1016/j.mtchem.2021.100654 ◽

2022 ◽

Vol 23 ◽

pp. 100654

Author(s):

K.Y. Hwa ◽

A. Ganguly ◽

A. Santhan ◽

T.S.K Sharma

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Three Dimensional ◽

One Dimensional ◽

Reduced Graphene ◽

Promethazine Hydrochloride

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Fabrication of bimodal micro-mesoporous amorphous carbon-graphitic carbon-reduced graphene oxide composite microspheres prepared by pilot-scale spray drying and their application in supercapacitors

Carbon ◽

10.1016/j.carbon.2018.12.111 ◽

2019 ◽

Vol 144 ◽

pp. 591-600 ◽

Cited By ~ 6

Author(s):

Ha-Na Kwon ◽

Gi Dae Park ◽

Yun Chan Kang ◽

Kwang Chul Roh

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Spray Drying ◽

Amorphous Carbon ◽

Pilot Scale ◽

Graphitic Carbon ◽

Oxide Composite ◽

Composite Microspheres ◽

Reduced Graphene

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Composites of amorphous carbon nanotube-modified reduced graphene oxide synthesized by ethanol decomposition and electrochemical evaluation of their lithium storage properties

Journal of Materials Science ◽

10.1007/s10853-016-9858-y ◽

2016 ◽

Vol 51 (11) ◽

pp. 5529-5544 ◽

Cited By ~ 6

Author(s):

Gang Wang ◽

Hanying Wang ◽

Hui Wang ◽

Jintao Bai

Keyword(s):

Graphene Oxide ◽

Carbon Nanotube ◽

Reduced Graphene Oxide ◽

Amorphous Carbon ◽

Lithium Storage ◽

Ethanol Decomposition ◽

Reduced Graphene ◽

Electrochemical Evaluation ◽

Storage Properties

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Rapid Nucleation of Reduced Graphene Oxide-Supported Palladium Electrocatalysts for Methanol Oxidation Reaction

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2019.16717 ◽

2019 ◽

Vol 19 (11) ◽

pp. 7236-7243

Author(s):

Jen Chao Ng ◽

Chou Yong Tan ◽

Boon Hoong Ong ◽

Atsunori Matsuda ◽

Wan Jefrey Basirun ◽

...

Keyword(s):

Graphene Oxide ◽

Microwave Irradiation ◽

Reduced Graphene Oxide ◽

Oxidation Reaction ◽

Room Temperature ◽

Methanol Oxidation Reaction ◽

Ph Adjustment ◽

Reduced Graphene ◽

High Supersaturation ◽

Supported Palladium

Small sized electrocatalysts, which can be obtained by rapid nucleation and high supersaturation are imperative for outstanding methanol oxidation reaction (MOR). Conventional microwave synthesis processes of electrocatalysts include ultrasonication, stirring, pH adjustment, and microwave irradiation of the precursor mixture. Ethylene glycol (EG), which serves as a reductant and solvent was added during the ultrasonication or stirring stage. However, this step and pH adjustment resulted in unintended multi-stage gradual nucleation. In this study, the microwave reduction approach was used to induce rapid nucleation and high supersaturation in order to fabricate small-sized reduced graphene oxide-supported palladium (Pd/rGO) electrocatalysts via the delayed addition of EG, elimination of the pH adjustment step, addition of sodium carbonate (Na2CO3), prior microwave irradiation of the EG mixed with Na2CO3, and addition of room temperature precursor mixture. Besides its role as a second reducing agent, the addition of Na2CO3 was primarily intended to generate an alkaline condition, which is essential for the high-performance of electrocatalysts. Moreover, the microwave irradiation of the EG and Na2CO3 mixture generated highly reactive free radicals that facilitate rapid nucleation. Meanwhile, the room temperature precursor mixture increased supersaturation. Results showed improved electrochemically active surface area (78.97 m2 g−1, 23.79% larger), MOR (434.49 mA mg−1, 37.96% higher) and stability.

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