Inexpensive sol-gel synthesis of multiwalled carbon nanotube-TiO2 hybrids for high performance antibacterial materials

This study reports an inexpensive sol-gel method to synthesize TiO2-CNT hybrid materials. Synthesized TiO2-CNT materials show strong antibacterial activity in the absence of light. Cheap TiO2 source TiOCl2 is used during synthesis in the absence of high temperatures, high pressures and organic solve...

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Bibliographic Details
Published in:Materials Science & Engineering C 2016-11, Vol.68, p.780-788
Main Authors: Abbas, Nadir, Shao, Godlisten N., Haider, M. Salman, Imran, Syed Muhammad, Park, Sung Soo, Jeon, Sun-Jeong, Kim, Hee Taik
Format: Article
Language:English
Subjects:
Anti-Bacterial Agents - chemistry
Anti-Bacterial Agents - pharmacology
Carbon nanotube, antibacterial
Cell Line
Cell Proliferation - drug effects
Escherichia coli - growth & development
Humans
Materials Testing
Nanotubes, Carbon - chemistry
Sol-gel
TiO2
Titanium - chemistry
Titanium - pharmacology
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Summary:This study reports an inexpensive sol-gel method to synthesize TiO2-CNT hybrid materials. Synthesized TiO2-CNT materials show strong antibacterial activity in the absence of light. Cheap TiO2 source TiOCl2 is used during synthesis in the absence of high temperatures, high pressures and organic solvents. TiO2-CNT materials with 0, 2, 5, 10, 15 and 20wt% of CNT were synthesized and compared for antibacterial activity, surface area, porosity, crystalline structure, chemical state, and HaCaT cell proliferation. The antibacterial strength of hybrid materials increased significantly with the increase in CNT loading amount, and the TiO2-CNT samples with a CNT loading of 10wt% or more nearly removed all of the E.coli bacteria. HaCaT cell proliferation studies of synthesized hybrid materials illustrated that prepared TiO2-CNT systems exhibit minimum cytotoxicity. The characteristics of prepared materials were analyzed by means of XRD, FTIR, Raman spectroscopy, XPS, TEM, and nitrogen gas physisorption studies, compared and discussed. [Display omitted] •An inexpensive scheme of preparing TiO2-CNT hybrids is presented.•Significant increase in the antibacterial properties of TiO2 in absence of light•Effects of CNT addition on the physicochemical properties of hybrids are studied.•Antibacterial activity increases with increase in CNT content.•Hybrids show no toxicity towards HaCaT skin cell line.
ISSN:0928-4931
1873-0191
DOI:10.1016/j.msec.2016.07.036