Preparation, characterization and long-term antibacterial activity of Ag-poly(dopamine)-TiO2 nanotube composites

CORC > 青岛生物能源与过程研究所 > 中国科学院青岛生物能源与过程研究所 > 热化学转化事业部

	Preparation, characterization and long-term antibacterial activity of Ag-poly(dopamine)-TiO2 nanotube composites
	Wang, Hongfen 1; Wei, Luyao 1; Wang, Zhiqi 2; Chen, Shougang 1
刊名	RSC ADVANCES
	2016
卷号	6 期号:17 页码:14097-14104
英文摘要	A simple and efficient approach for the loading of Ag nanoparticles on poly(dopamine)-modified TiO2 nanotubes (PDA-TNTs) was used to prepare a Ag nanoparticle-poly(dopamine)-TiO2 nanotube composite (Ag-PDA-TNTs) that was applied as a long-term antibacterial agent to inhibit the growth of bacterial cells. The features of the obtained Ag-PDA-TNTs were investigated by TEM, XRD, FT-IR and XPS analysis. Anatase TNTs were encapsulated in PDA layers with a thickness of about 3 nm on which about 20.4 wt% of single crystalline Ag nanoparticles anchored. XPS and FT-IR results indicated that the PDA layer not only served as a reduction reagent that could reduce Ag+ ions to Ag nanoparticles but also worked as an adhesive coating by tethering the Ag nanoparticles on the surface of PDA-TNTs. The long-term release profiles of the nanocomposites showed that PDA layers slowed the release rate of Ag nanoparticles, implying the possible long-term antibacterial activity of Ag-PDA-TNTs; and the antibacterial assays verified this point. Besides that, the antibacterial activity of Ag-PDA-TNTs under visible light was higher than that in the dark because of the synergistically antibacterial effects of Ag nanoparticles and ROS under visible light irradiation. Compared with the antibacterial activity of TiO2 nanotubes loaded with Ag nanoparticles (Ag-TNTs), Ag-PDA-TNTs had higher and longer-term antibacterial activity which is attributed to the effect of PDA layers tethering Ag nanoparticles on TNTs and slowing Ag+ ions release rate. This work provides a new method for the preparation of Ag-based antibacterial agents and facilitates their practical application in modern antifouling and biomedical fields.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Multidisciplinary
研究领域[WOS]	Chemistry
关键词[WOS]	SILVER NANOPARTICLES ; TIO2 NANOPARTICLES ; TITANIA NANOTUBES ; DOPAMINE ; FUNCTIONALIZATION ; SURFACES ; GRAPHENE ; OXIDE ; NANOCOMPOSITES ; POLYDOPAMINE
收录类别	SCI
语种	英语
WOS记录号	WOS:000369639400061
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/7968]
专题	青岛生物能源与过程研究所_热化学转化事业部
作者单位	1.Ocean Univ China, Inst Mat Sci & Engn, Qingdao 266100, Peoples R China 2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China
推荐引用方式 GB/T 7714	Wang, Hongfen,Wei, Luyao,Wang, Zhiqi,et al. Preparation, characterization and long-term antibacterial activity of Ag-poly(dopamine)-TiO2 nanotube composites[J]. RSC ADVANCES,2016,6(17):14097-14104.
APA	Wang, Hongfen,Wei, Luyao,Wang, Zhiqi,&Chen, Shougang.(2016).Preparation, characterization and long-term antibacterial activity of Ag-poly(dopamine)-TiO2 nanotube composites.RSC ADVANCES,6(17),14097-14104.
MLA	Wang, Hongfen,et al."Preparation, characterization and long-term antibacterial activity of Ag-poly(dopamine)-TiO2 nanotube composites".RSC ADVANCES 6.17(2016):14097-14104.