Water-Repellent TiO2-Organic Dye-Based Air Filters for Efficient Visible-Light-Activated Photochemical Inactivation against Bioaerosols
| Autor: | Yeonsang Kim, Jae Hee Jung, Sang Bin Jeong, Ki Joon Heo, Juhun Shin, Gi Byoung Hwang, Hyun Sik Ko, Dong Yun Choi |
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| Rok vydání: | 2020 |
| Předmět: |
Chemistry
Mechanical Engineering Indoor bioaerosol Humidity Bioengineering 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Antimicrobial Photochemistry law.invention chemistry.chemical_compound law Organic dye Titanium dioxide General Materials Science 0210 nano-technology Filtration Visible spectrum Air filter |
| Zdroj: | Nano Letters |
| ISSN: | 1530-6992 1530-6984 |
| Popis: | Recently, bioaerosols, including the 2019 novel coronavirus, pose a serious threat to global public health. Herein, we introduce a visible-light-activated (VLA) antimicrobial air filter functionalized with titanium dioxide (TiO2)-crystal violet (CV) nanocomposites facilitating abandoned visible light from sunlight or indoor lights. The TiO2-CV based VLA antimicrobial air filters exhibit a potent inactivation rate of ∼99.98% and filtration efficiency of ∼99.9% against various bioaerosols. Under visible-light, the CV is involved in overall inactivation by inducing reactive oxygen species production both directly (CV itself) and indirectly (in combination with TiO2). Moreover, the susceptibility of the CV to humidity was significantly improved by forming a hydrophobic molecular layer on the TiO2 surface, highlighting its potential applicability in real environments such as exhaled or humid air. We believe this work can open a new avenue for designing and realizing practical antimicrobial technology using ubiquitous visible-light energy against the threat of infectious bioaerosols. |
| Databáze: | OpenAIRE |
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