Ag katkılı TiO2 ve TiO2/PVA nanokompozit tozların antibakteriyel, optik ve mikroyapısal özelliklerinin araştırılması

Yıl 2022, Cilt: 12 Sayı: 2, 687 - 698, 15.04.2022

Şeyma Duman , Büşra Bulut

https://doi.org/10.17714/gumusfenbil.1007800

Cited By: 1

Öz

Bu çalışmanın amacı, sol-jel prosesi ile sentezlenen gümüş (Ag) katkılı titanyum dioksit (TiO2) ve titanyum dioksit - polivinil alkol (TiO2/PVA) nanokompozit tozların mikroyapısal, optik ve antibakteriyel özelliklerini araştırmaktır. Nanokompozit tozların toz karakterizasyonu, SEM, EDS, XRD, lazer partikül boyutu, spesifik yüzey alanı, UV-vis analizi ve yoğunluk ölçümleri ile gerçekleştirilmiştir. SEM incelemeleri, PVA katkı maddesi kullanılarak sentezlenen TiO2 nanopartiküllerin nispeten küresel morfolojiye sahip olduğunu gösterdi. Katkısız ve Ag katkılı TiO2/PVA nanokompozit tozların XRD mikroanalizi ile anataz fazında olduğu tespit edildi. Nanokompozit tozlarda gümüşün varlığı, EDS analizi, XRD ve UV-vis pik kaymaları ile tespit edildi. Gümüş ve polimer katkılama, TiO2 sisteminde yüzey alanı ve yoğunluk değerlerini azaltmıştır. Nanokompozit tozlara Ag katkılandırılması, sentezlenen TiO2 ve TiO2/PVA nanokompozit tozların Staphylococcus aureus (S. aureus) ve Escherichia coli (E. coli)'ye karşı antibakteriyel aktivitesini önemli ölçüde iyileştirmiştir. Ayrıca, antibakteriyel aktivite etkisinin S. aureus’a kıyasla E. Coli üzerine daha az olduğu saptanmıştır.

Anahtar Kelimeler

Ag, Antibakteriyel özellikler, Optik özellikler, Mikroyapısal özellikler, PVA, TiO2

Antibacterial, optical, and microstructural properties investigations of Ag-doped TiO2 and TiO2/PVA nanocomposite powders

Öz

This research aims to investigate the microstructural, optical, and antibacterial properties of silver (Ag) doped titanium dioxide (TiO2) and titanium dioxide - polyvinyl alcohol (TiO2/PVA) nanocomposite powders synthesized by the sol-gel method. The powder state characterization of the nanocomposite powders was performed with SEM, EDS, XRD, laser particle size, specific surface area, density measurements, UV-vis analysis, and antibacterial tests. SEM examinations demonstrated that titanium dioxide nanoparticles synthesized using PVA dopant have relatively spherical morphology. It detected that pure, Ag-doped TiO2 and Ag-doped TiO2/PVA nanocomposite powders are in an anatase phase by XRD microanalysis. The existence of silver in the nanocomposite powders was detected by EDS analysis, XRD, and UV-vis in peak shifts. The silver and polymer dopings were decreased surface area and density values for the TiO2 system. The addition of Ag to the nanocomposite powders significantly improved the antibacterial properties of the synthesized TiO2 and TiO2/PVA nanocomposite powders against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). However, it determined that the antibacterial activity effect was little on E. coli compared to S. aureus.

Anahtar Kelimeler

Ag, Antibacterial properties, Optical properties, Microstructural properties, PVA, TiO2

Kaynakça

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