Photon-driven bactericidal performance of surface-modified TiO2 nanofibers

被引：17

作者：

Shahriari-Khalaji, Mina ^{[1
]}

Zabihi, Fatemeh ^{[3
]}

Bahi, Addie ^{[5
]}

Sredojevic, Dusan ^{[4
,5
]}

Nedeljkovic, Jovan M. ^{[4
]}

Macharia, Daniel K. ^{[1
]}

Ciprian, Matteo ^{[1
]}

Yang, Shengyuan ^{[1
]}

Ko, Frank ^{[2
]}

机构：

[1] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, Int Joint Lab Adv Fiber & Lowdimens Mat, Shanghai 201620, Peoples R China

[2] Univ British Columbia, Dept Mat Engn, Vancouver, BC V6T 1Z4, Canada

[3] TOOTIYA NotArobe LTD, 71-75 Shelton St, London WC2H 9JQ, England

[4] Univ Belgrade, Vinca Inst Nucl Sci, Natl Inst Republ Serbia, Ctr Excellence Photoconvers, POB 522, Belgrade 11001, Serbia

[5] Texas A&M Univ Qatar, POB 23874, Doha, Qatar

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2023年 / 11卷 / 17期

基金：

中国国家自然科学基金;

关键词：

DOPED TIO2; ANTIBACTERIAL ACTIVITY; PHOTOCATALYST; NANOPARTICLES; HYBRID; DFT;

D O I：

10.1039/d3tc00473b

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Visible-light-responsive graphite-embedded titanium dioxide nanofibers (G-TiO2 NFs), prepared by electrospinning and post-treatment with rhodizonic acid (RhA), show biocidal effects against E. coli and S. aureus when excited with visible light. The red absorption shift of surface-modified G-TiO2 NFs with RhA of about 1.1 eV is a consequence of interfacial charge transfer (ICT) complex formation facilitated by a condensation reaction between hydroxyl groups originating from the ligand and surface TiO2. The optical properties of the inorganic-organic hybrid are studied in-depth by density functional theory (DFT) calculations using a cluster model. The prepared samples are thoroughly characterized using X-ray diffraction (XRD) analysis, electron paramagnetic resonance spectroscopy (EPR), Fourier-transform infra-red (FTIR) spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). Under visible light illumination, surface-modified G-TiO2 NFs display a near-to ideal biocidal effect against E. coli and S. aureus and no cytotoxicity was observed toward L929 fibroblast cells. Overall, the experimental results suggest that fabrics based on surface-modified G-TiO2 NFs with RhA can be potentially used to control the persistence and spread of bacterial infection.

引用

页码：5796 / 5805

页数：10

共 45 条

[1] Synthesis and Investigation of Antibacterial Activity of Thin Films Based on TiO2-Ag and SiO2-Ag with Potential Applications in Medical Environment [J].