Kim Ji-Hyeon, Ma Junfei, Lee Seunghun, Jo Sungjin, Kim Chang Su
Advanced Nano-Surface Department, Korea Institute of Materials Science, 797, Changwon-daero, Sungsan-gu, Changwon 51508, Korea.
School of Architectural, Civil, Environmental, and Energy Engineering, Kyungpook National University, Daegu 41566, Korea.
Materials (Basel). 2019 Jul 29;12(15):2422. doi: 10.3390/ma12152422.
To combat infectious diseases, zinc oxide (ZnO) has been identified as an effective antibacterial agent; however, its performance can be adversely affected by harsh application environments. The ozone impact on ZnO antibacterial film needs to be evaluated prior to its application in an ozone disinfection system. In this study, ZnO films synthesized via sol-gel/spin-coating were subjected to ultraviolet-ozone (UVO) treatment for different periods. Surface investigations using scanning electron microscopy, ultraviolet-visible spectroscopy, and X-ray photoelectron spectroscopy revealed that the treatment-induced film changes. With longer UVO treatment, the surface porosity of the film gradually increased from 5% to 30%, causing the transmittance reduction and absorbance increase in visible-light range. Phase transformation of Zn(OH) to ZnO occurred during the first 10 min of UVO treatment, followed by oxygen uptake as a consequence of the reaction with reactive oxygen species generated during UVO treatment. However, despite these surface changes, the satisfactory antibacterial activity of the synthesized ZnO film against and was sustained even after 120 min of UVO treatment. This indicates that the UVO-induced surface changes do not have a significant effect on the antibacterial performance and that the ZnO sol-gel film possesses good functional durability in ozone environments.
为对抗传染病，氧化锌（ZnO）已被确认为一种有效的抗菌剂；然而，其性能可能会受到恶劣应用环境的不利影响。在将ZnO抗菌膜应用于臭氧消毒系统之前，需要评估臭氧对其的影响。在本研究中，通过溶胶 - 凝胶/旋涂法合成的ZnO薄膜接受了不同时长的紫外臭氧（UVO）处理。使用扫描电子显微镜、紫外可见光谱和X射线光电子能谱进行的表面研究表明，该处理导致了薄膜的变化。随着UVO处理时间延长，薄膜的表面孔隙率从5%逐渐增加到30%，导致可见光范围内的透光率降低和吸光度增加。在UVO处理的前10分钟内发生了Zn(OH)向ZnO的相变，随后由于与UVO处理过程中产生的活性氧物种反应而发生吸氧现象。然而，尽管有这些表面变化，合成的ZnO薄膜即使在UVO处理120分钟后，对[具体细菌1]和[具体细菌2]仍保持令人满意的抗菌活性。这表明UVO诱导的表面变化对抗菌性能没有显著影响，并且ZnO溶胶 - 凝胶薄膜在臭氧环境中具有良好的功能耐久性。
