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TiO2 nanoparticles co-doped with silver and nitrogen for antibacterial application

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WOS被引频次:49
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成果类型:
期刊论文、会议论文
作者:
Yuan, Yali*;Ding, Jianqiang;Xu, Jinsheng;Deng, Jian;Guo, Jianbo
通讯作者:
Yuan, Yali
作者机构:
[Ding, Jianqiang] Zhenhai Center for Disease Control and Prevention, Ningbo 315200, China
[Xu, Jinsheng] Department of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China
[Deng, Jian; Yuan, Yali] School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
[Guo, Jianbo] School of Public Health, University of South China, Hengyang 421001, China
通讯机构:
[Yuan, Yali] Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
语种:
英文
关键词:
Absorption band - Ag doping - Anatase structures - Anti-bacterial activity - Antibacterial properties - Bacillus Subtilis - Characteristic absorption - Co-doped - Diffusion method - Fluorescent light - FTIR - Hydrolysis precipitation - Interfacial structures - Mean size - N-doped TiO - N-Doping - Nanoparticle sizes - OH group - Optical absorption - Red shift - Silver nitrates - TEM - TiO - UV-Vis diffuse reflectance spectroscopy - UV-vis-DRS - UV-visible - X-ray diffraction measurements - XRD - XRD spectra
期刊:
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
ISSN:
1533-4880
年:
2010
卷:
10
期:
8
页码:
4868-4874
文献类别:
WOS:Article;EI:Conference article (CA)
所属学科:
ESI学科类别:材料科学;WOS学科类别:Chemistry, Multidisciplinary;Materials Science, Multidisciplinary;Nanoscience & Nanotechnology;Physics, Applied;Physics, Condensed Matter
入藏号:
WOS:000278056200005;EI:20111813942487;PMID:21125821
基金类别:
Hunan Provincial Natural Science Foundation of China [06jj4011]
机构署名:
本校为其他机构
院系归属:
化学与材料科学学院
摘要:
We have prepared a series of TiO<inf>2</inf> nanoparticles for antibacterial applications. These TiO<inf>2</inf> nanoparticles were prepared by the hydrolysis precipitation method with Ti(OBu)<inf>4</inf>, silver nitrate and ammonia. Crystal structure, particle size, interfacial structure and UV-visible light response of the prepared nanoparticles were characterized by X-ray diffraction measurements (XRD), Transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR) and UV-Vis diffuse reflectance spectroscopy (UV-Vis-DRs). The XRD spectra showed that all samples were anatase structure calcined at 450 &deg;C for 3 hours. The Ag doping made the peak of diffraction wider. The results of TEM showed that the nanoparticles of TiO <inf>2</inf>, N-TiO<inf>2</inf> and 1% Ag-N-TiO<inf>2</inf> were all spherical in shape and well distributed with a mean size of 19.8 nm, 39.2 nm and 20.7 nm, respectively. N doping caused the nanoparticle size to increase, while, when the doped amount of Ag<sup>+</sup> increased, the TiO<inf>2</inf> particle size decreased. The FTIR revealed that Ag and N doping of TiO<inf>2</inf> appeared to have strong absorption by -OH group and showed the characteristic absorption band of NH<sup>+</sup><inf>4</inf> and Ag. The UV-Vis-DRs indicated that the absorption band of Ag-N co-doped TiO<inf>2</inf> had red shift and that the optical absorption response (between 400 nm and 700 nm) had obvious enhancement. The antibacterial properties of nanoparticles were investigated by agar diffusion method toward Escherichia coli and Bacillus subtilis. The results indicated that both Ag-and N-doped TiO<inf>2</inf> could increase the antibacterial properties of TiO<inf>2</inf> nanoparticles under fluorescent light irradiation. A 1% Ag-N-TiO<inf>2</inf> had the highest antibacterial activity with a clear antibacterial circle of 33.0 mm toward Escherichia coli and 22.8 mm toward Bacillus subtilis after cultivation for 24 hours. Copyright &copy;2010 American Scientific Publishers.
参考文献:
Abazovic ND, 2008, J NANOSCI NANOTECHNO, V8, P613, DOI 10.1166/jnn.2008.A226
ASAHI R, 2001, SCIENCE, V269, P293
Brook LA, 2007, J PHOTOCH PHOTOBIO A, V187, P53, DOI 10.1016/j.jphotochem.2006.09.014
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