期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 130, 期 -, 页码 65-72出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2012.10.021
关键词
Vacuum RF-plasma; TiO2 photocatalysis; OH-radicals; Bacterial inactivation kinetics
资金
- COST Action Highly Ionized Pulse Plasma Processes (HIPIMS) [MP0804]
- Swiss-Hungarian Cooperation Program Sustainable fine chemicals pharmaceutical industry: screening and utilization of liquid wastes
- EPFL
Evidence presented for the RF pretreatment of polyester enhances the TiO2 coating generation of oxidative species/radicals under a low level actinic light irradiation. After 30 min RF-plasma pretreatment of the polyester samples, the fastest bacterial inactivation was observed concomitant with (a) the largest ratio of surface oxidized to the reduced functionalities as determined by XPS, (b) a strong sample optical absorption as seen by DRS and (c) the highest concentration surface OH-radicals monitoring the fluorescence of the hydroxy-terephthalic acid. Evidence for the photocatalyst self-cleaning was found by XPS due to the lack of accumulation of bacterial residues on the polyester-TiO2. A further proof of self-cleaning was the ability by the polyester-TiO2 samples to inactivate again bacterial charge at the end of an inactivation cycle. By XPS evidence is presented for the Ti4+/Ti3+ related redox catalysis and the details of the C and O-functionalities. Surface techniques such as XRF, DRS, TEM, contact angle (CA), XRD and XPS were applied to relate the microstructure of the TiO2 coatings with the destruction of Escherichia coli taken as a probe. (c) 2012 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据