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Synthesis and Characterization of Visible-to-UVC Upconversion Antimicrobial Ceramics

机译：可见光-UVC上转换抗菌陶瓷的合成与表征

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摘要

The objective of this study was to develop visible-to-ultraviolet C (UVC) upconversion ceramic materials, which inactivate surface-borne microbes through frequency amplification of ambient visible light. Ceramics were formed by high-temperature sintering of compacted yttrium silicate powders doped with Pr~(3+) and Li~+. In comparison to previously reported upconversion surface coatings, the ceramics were significantly more durable and had greater upconversion efficiency under both laser and low-power visible light excitation. The antimicrobial activity of the surfaces under diffuse fluorescent light was assessed by measuring the inactivation of Bacillus subtilis spores, the rate of which was nearly 4 times higher for ceramic materials compared to the previously reported films. Enhanced UVC emissions were attributed to increased material thickness as well as increased crystallite size in the ceramics. These results represent significant advancement of upconversion surfaces for sustainable, light-activated disinfection applications.
机译：这项研究的目的是开发可见光到紫外线C（UVC）上转换陶瓷材料，该材料通过对环境可见光进行频率放大来灭活表面传播的微生物。通过对Pr〜（3+）和Li〜+掺杂的致密硅酸钇粉进行高温烧结，形成陶瓷。与先前报道的上转换表面涂层相比，陶瓷在激光和低功率可见光激发下均显着更耐用，并且具有更高的上转换效率。通过测量枯草芽孢杆菌孢子的失活来评估在漫射荧光下表面的抗菌活性，与以前报道的薄膜相比，陶瓷材料的枯草芽孢杆菌的失活率高出近4倍。 UVC排放增加归因于陶瓷材料厚度的增加以及微晶尺寸的增加。这些结果代表了上转换表面在可持续，光活化消毒应用方面的重大进步。

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  • 来源
    《Environmental Science & Technology》 |2014年第4期|2290-2297|共8页
  • 作者

    Stephanie L. Cates; Ezra L. Cates; Min Cho; Jae-Hong Kim;

  • 作者单位

    Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States,School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0373, United States;

    Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States;

    Division of Biotechnology, Advanced Institute of Environmental and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752, South Korea;

    Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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