Microwave-Assisted Chemistry

Horikoshi, Satoshi; Schiffmann, Robert F.; Fukushima, Jun; Serpone, Nick

doi:10.1007/978-981-10-6466-1_9

Cited by 3 publications

(3 citation statements)

References 270 publications

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“…[35] Among all the reported techniques, microwaveassisted synthesis requires minimal time and is costeffective. [2,[36][37][38] Microwave heating can directly react through the dielectric loss of material via a rapid volumetric heating process without a thermal field gradient and uniform heating in a very short duration is achieved. [7] Moreover, this technique is environmentally friendly and has high productivity, better selectivity and reproducibility.…”

Section: Doi: 101002/ente202301524mentioning

confidence: 99%

Zinc Cobalt Sulfide/Reduced Graphene Oxide Nanocomposite for High‐Performance Asymmetric Supercapacitor: A Microwave‐Assisted Synthesis

Konwar,

Singh,

Borthakur

2024

Energy Tech

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In this work, the microwave‐assisted synthesis of ZnxCo1–xS/reduced graphene oxide (rGO) nanocomposite and the evaluation of its electrochemical properties for supercapacitor (SC) application are dealt with. The synergistic effect between ZnxCo1–xS and rGO along with the conducting network provided by rGO facilitates the conducive movement of ions and enhances the electrochemical performance of the nanocomposite. The stoichiometric ratio of Zn:Co:rGO plays a crucial role in the SC behavior of the material. In three electrode systems, a material shows a high specific capacitance of 1094 F g−1 at current density 1 A g−1. The material stores charge both diffusively as well as capacitively. An asymmetric SC with acetylene black as the negative electrode and ZnxCo1–xS/rGO as the positive electrode has a stable potential window 0–1.6 V. For the fabrication of the electrodes, Ni foam is used as the current collector. The energy density and power density of the SC are found to be 32.71 and 431.95 W kg−1, respectively. The Coulombic efficiency of the SC is found to be 107% while its capacitance retention is 86% after 10 000 galvanostatic charge–discharge cycles. The energy and power density of the SC are comparatively higher than many recently reported literature. The material exhibits superior electrochemical stability and reversibility and can be a suitable electrode material for SCs.

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Section: Doi: 101002/ente202301524mentioning

confidence: 99%

Zinc Cobalt Sulfide/Reduced Graphene Oxide Nanocomposite for High‐Performance Asymmetric Supercapacitor: A Microwave‐Assisted Synthesis

Konwar,

Singh,

Borthakur

2024

Energy Tech

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“…Under microwave (MW) irradiation graphene generates ions or electrons, forming an electric current, and energy is lost due the electrical resistance of the material [61,62]. This MW irradiation results in exfoliation of the graphene with an enhanced C/O ratio [63,64].…”

Section: Microwave Irradiationmentioning

confidence: 99%

“…Subjecting an organic compound to extreme conditions, namely high temperature/pressure, irradiation with UV and MW radiation [62], carbonization, or chemical oxidationreduction with different chemicals, results in its conversion into newcompounds of interest [75]. These intermediate or fusion products of previous reactants after purification, or as such, yield graphene-like materials or GQDs [36].…”

Section: Molecular Fusion-condensationmentioning

confidence: 99%

Recent Advancement in Bio-precursor derived graphene quantum dots: Synthesis, Characterization and Toxicological Perspective

et al. 2020

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Graphene quantum dots (GQDs), impressive materials with enormous future potential, are reviewed from their inception, including different precursors. Considering the increasing burden of industrial and ecological bio-waste, there is an urgency to develop techniques which will convert biowaste into active moieties of interest. Amongst the various materials explored, we selectively highlight the use of potential carbon containing bioprecursors (e.g. plant-based, amino acids, carbohydrates), and industrial waste and its conversion into GQDs with negligible use of chemicals. This review focuses on the effects of different processing parameters that affect the properties of GQDs, including the surface functionalization, paradigmatic characterization, toxicity and biocompatibility issues of bioprecursor derived GQDs. This review also examines current challenges and s the ongoing exploration of potential bioprecursors for ecofriendly GQD synthesis for future applications. This review sheds further light on the electronic and optical properties of GQDs along with the effects of doping on the same. This review may aid in future design approaches and applications of GQDs in the biomedical and materials design fields.

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