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The effect of the deposition parameters on size, distribution and antimicrobial properties of photoinduced silver nanoparticles on titania coatings

机译：沉积参数对二氧化钛涂层上光致银纳米粒子的尺寸，分布和抗菌性能的影响

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摘要

Controlled photodeposition of silver nanoparticles (AgNP) on titania coatings using two different sources of UV light is described. Titania (anatase) thin films were prepared by the sol-gel dip-coating method on silicon wafers. AgNPs were grown on the titania surface as a result of UV illumination of titania films immersed in aqueous solutions of silver nitrate. UV xenon lamp or excimer laser, both operating at the wavelength 351 ±5nm, was used as illumination sources. The AFM topography of AgNP/TiO2 nanocomposites revealed that silver nanoparticles could be synthesized by both sources of illumination, however the photocatalysis carried out by UV light from xenon lamp illumination leads to larger AgNP than those synthesized using the laser beam. It was found that the increasing concentration of silver ions in the initial solution increases the number of Ag nanoparticles on the titania surface, while longer time of irradiation results the growth of larger size nanoparticles. Antibacterial tests performed on TiO2 covered by Ag nanoparticles revealed that increasing density of nanoparticles enhances the inhibition of bacterial growth. It was also found that antibacterial activity drops by only 10-15% after 6 cycles compared to the initial use.
机译：描述了使用两种不同的紫外线光源在二氧化钛涂层上进行银纳米颗粒（AgNP）的受控光沉积。通过溶胶-凝胶浸涂法在硅晶片上制备二氧化钛（锐钛矿）薄膜。由于将二氧化钛薄膜浸入硝酸银水溶液中而进行了紫外线照射，因此二氧化钛表面上生长了AgNP。紫外氙灯或准分子激光器均在351±5nm的波长下工作，用作照明源。 AgNP / TiO2纳米复合材料的AFM形貌表明，两种照射源均可合成银纳米颗粒，但是氙气灯照射的UV光进行的光催化作用比使用激光束合成的AgNP更大。发现初始溶液中银离子浓度的增加增加了二氧化钛表面上Ag纳米粒子的数量，而更长的照射时间导致了较大尺寸的纳米粒子的生长。对Ag纳米颗粒覆盖的TiO2的抗菌测试表明，纳米颗粒密度的增加会增强细菌生长的抑制作用。还发现，与最初使用相比，抗菌活性在6个循环后仅下降10-15％。

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  • 来源
    《Applied Surface Science》 |2011年第16期|p.7076-7082|共7页
  • 作者

    Ireneusz Piwonski; Kinga Kadzioia; Aneta Kisielewska; Katarzyna Soliwoda; Marian Wolszczak; Katarzyna Lisowska; Natalia Wronska; Aleksandra Felczak;

  • 作者单位

    University of Lodz, Department of Technology and Chemistry of Materials, Pomorska 163, 90-236 Lodz, Poland;

    University of Lodz, Department of Technology and Chemistry of Materials, Pomorska 163, 90-236 Lodz, Poland;

    University of Lodz, Department of Technology and Chemistry of Materials, Pomorska 163, 90-236 Lodz, Poland;

    University of Lodz, Department of Technology and Chemistry of Materials, Pomorska 163, 90-236 Lodz, Poland;

    Technical University of Lodz, Institute of Applied Radiation Chemistry, Wroblewskiego 15, 93-590 Lodz, Poland;

    University of Lodz, Department of Industrial Microbiology and Biotechnology, Pilarskiego 14/16,90-231 Lodz, Poland;

    University of Lodz, Department of Industrial Microbiology and Biotechnology, Pilarskiego 14/16,90-231 Lodz, Poland;

    University of Lodz, Department of Industrial Microbiology and Biotechnology, Pilarskiego 14/16,90-231 Lodz, Poland;

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  • 正文语种 eng
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  • 关键词

    silver nanoparticles; titanium dioxide; photodeposition; uv illumination; afm; antimicrobial;

    机译：纳米银;二氧化钛;光沉积;紫外光照射;原子吸收强度;抗菌;

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