Decorated cenosphere surface with bioreduced silver nanoparticles for environmental applications

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F25%3A63596178" target="_blank" >RIV/70883521:28110/25:63596178 - isvavai.cz</a>

Alternative codes found

RIV/61989100:27230/25:10258568 RIV/61989100:27640/25:10258568

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0272884225032584?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0272884225032584?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ceramint.2025.07.067" target="_blank" >10.1016/j.ceramint.2025.07.067</a>

Result language

angličtina

Original language name

Decorated cenosphere surface with bioreduced silver nanoparticles for environmental applications

Original language description

Cenospheres (CF) are hollow spherical particles primarily composed of silica (SiO2) and alumina (Al2O3), known as aluminosilicate ceramic microspheres. In this study, CF were fractionated into the four size ranges (40–80 μm, 80–125 μm, 125–160 μm, 160–200 μm), purified, and activated using piranha solution (PS). Acid treatment activation was followed by the CF functionalization with biosynthesized silver colloidal nanoparticles (AgNPs). Silver integration was confirmed using elemental analysis (5.8–7.1 wt% of Ag), and electron microscopy revealed AgNPs (∼45 nm) unevenly distributed and locate at surface defects. X-ray diffraction (XRD) analysis confirmed the presence of quartz and mullite phases in both raw and modified CF, indicating structural stability during processing. Sound absorption tests revealed that while larger CF particles—especially the 160–200 μm fraction—initially demonstrated the highest noise reduction coefficient (NRC), with a maximum NRC of 0.210 at 80 mm powder bed heigh, the modification with AgNP significantly diminished the dependency of sound absorption performance on particle size. Ag-modified samples showed NRC values, CF with a particle size fraction pf 160–200 μm: 0.158, at 80 mm, confirming uniform acoustic performance. Mechanical stiffness, expressed by bulk modulus, increased with both particle size and powder bed density, reaching a maximum of 64.26 MPa for CF_160200_2 PS_Ag. Leaching tests under static, dynamic, and rotation conditions revealed limited silver release, with only slightly increased leaching observed for larger particles under rotation. Silver release from CF_160200_2 PS_Ag was 0.007 wt% (static), 0.008 wt% (dynamic), and 0.010 wt% (rotation). Overall, Ag release remained low, confirming high material stability. These results show that silver-modified CF retain their structural and chemical integrity, offer tunable acoustic and mechanical properties, and show excellent potential for long-term use in environmental remediation, sound insulation, and catalytic applications.

Czech name

—

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

—

OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

<a href="/en/project/EH22_008%2F0004631" target="_blank" >EH22_008/0004631: Materials and technologies for sustainable development</a><br>

Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2025

Confidentiality

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

Name of the periodical

Ceramics International

ISSN

0272-8842

e-ISSN

1873-3956

Volume of the periodical

51

Issue of the periodical within the volume

24

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

43276-43288

UT code for WoS article

001575351300018

EID of the result in the Scopus database

2-s2.0-105010114399