Carbon framework modification; an interesting strategy to improve the energy storage and dye adsorption

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F24%3A10255422" target="_blank" >RIV/61989100:27360/24:10255422 - isvavai.cz</a>

Result on the web

<a href="https://pubs.rsc.org/en/content/articlelanding/2024/ya/d4ya00159a" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2024/ya/d4ya00159a</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d4ya00159a" target="_blank" >10.1039/d4ya00159a</a>

Result language

angličtina

Original language name

Carbon framework modification; an interesting strategy to improve the energy storage and dye adsorption

Original language description

Porous carbons find various applications, including as adsorbents for clean water production and as electrode materials in energy storage devices such as supercapacitors. While supercapacitors reach higher power densities than batteries, they are less widely used, as their energy density is lower. We present a low-temperature wet ultrasonochemical synthesis technique to modify the surface of activated carbon with 1 wt% Cu nanoparticles. We analyzed the modified carbon using X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and transmission electron microscopy and confirmed the composite formation by N2 adsorption-desorption isotherms at 77 K. For comparison, we did the same tests on pristine carbon. We used the modified carbon as an electrode material in a home-built supercapacitor filled with gel polymer electrolyte and as an absorbent of Malachite green dye. In both applications, the modified carbon performed substantially better than its pristine counterpart. The modified-carbon supercapacitor exhibited a single electrode-specific capacitance of approximately 68.9 F gMINUS SIGN 1. It also demonstrated an energy density of 9.8 W h kgMINUS SIGN 1 and a power density of 1.4 kW kgMINUS SIGN 1. These values represent improvements over the pristine-carbon supercapacitor, with increases of 25.7 F gMINUS SIGN 1 in capacitance, 3.8 W h kgMINUS SIGN 1 in energy density, and 0.5 kW kgMINUS SIGN 1 in power density. After 10 000 charging-discharging cycles, the capacitance of the modified-carbon supercapacitor decreased by approximately 10%, indicating good durability of the material. We found that the modified carbon&apos;s absorbance capacity for Malachite dye is more than that of the pristine carbon; the adsorption capacity value was TILDE OPERATOR+D91153.16 mg gMINUS SIGN 1 for modified carbon with pseudo-second kinetic order, in accordance with the Redlich-Peterson adsorption model. (C) 2024 RSC.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10406 - Analytical chemistry

Project

—

Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Energy Advances

ISSN

2753-1457

e-ISSN

2753-1457

Volume of the periodical

3

Issue of the periodical within the volume

6

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

1354-1366

UT code for WoS article

001221209300001

EID of the result in the Scopus database

2-s2.0-85193465095