Photocatalysis of nanocomposite titania-natural silica as antibacterial against and
The entries of pathogenic bacteria into the human body remain a severe problem to health that can be prevented using antibacterial agents. Meanwhile, the photocatalytic technique using semiconductor nanocomposite TiO 2 -SiO 2 has great potential as an antibacterial method. In order to utilize natura...
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Published in | RSC advances Vol. 11; no. 61; pp. 38528 - 38536 |
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Main Authors | , , , , , |
Format | Journal Article |
Published |
08.12.2021
|
Online Access | Get full text |
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Summary: | The entries of pathogenic bacteria into the human body remain a severe problem to health that can be prevented using antibacterial agents. Meanwhile, the photocatalytic technique using semiconductor nanocomposite TiO
2
-SiO
2
has great potential as an antibacterial method. In order to utilize natural resources, SiO
2
supporting materials are obtained from the extraction of beach sand due to the high silica content. Therefore, this study aims to synthesize a nanocomposite of TiO
2
with SiO
2
extracted from beach sand as an antibacterial agent against
Staphylococcus aureus
and
Pseudomonas aeruginosa
. The antibacterial activity test used the dilution and optical density method. Based on XRD analysis, the crystals of TiO
2
in the synthesized composites showed a more dominant anatase structure. Furthermore, Ti-O-Si bonds were identified from the IR spectrum, which showed the interaction between TiO
2
and SiO
2
. In addition, SEM-EDX results showed agglomerated spherical particles with a TiO
2
-SiO
2
nanocomposite particle size of 40-107 nm. The best antibacterial activity was demonstrated by the 1 : 0.5 TiO
2
-SiO
2
nanocomposite, with inactivation percentages of
S. aureus
and
P. aeruginosa
of 98.69% and 97.44%, respectively.
TiO
2
material is composited with silica obtained from natural sand with indirect sonochemistry method. The addition of SiO
2
increase the photocatalyst activity of TiO
2
as an antibacterial against
S. aureus
and
P. aeruginosa
. |
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Bibliography: | 10.1039/d1ra07043f Electronic supplementary information (ESI) available: Goodness of fit (GoF) equation and the Rietveld refinement plot for XRD analysis. See DOI |
ISSN: | 2046-2069 |
DOI: | 10.1039/d1ra07043f |