Decorated cenosphere surface with bioreduced silver nanoparticles for environmental applications

Kód výsledku v 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>

Nalezeny alternativní kódy

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

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Decorated cenosphere surface with bioreduced silver nanoparticles for environmental applications

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Decorated cenosphere surface with bioreduced silver nanoparticles for environmental applications

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

<a href="/cs/project/EH22_008%2F0004631" target="_blank" >EH22_008/0004631: Materiály a technologie pro udržitelný rozvoj</a><br>

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Ceramics International

ISSN

0272-8842

e-ISSN

1873-3956

Svazek periodika

51

Číslo periodika v rámci svazku

24

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

43276-43288

Kód UT WoS článku

001575351300018

EID výsledku v databázi Scopus

2-s2.0-105010114399