Correlation of Photocatalytic Bactericidal Effect and Organic Matter Degradation of TiO2 Part I: Observation of Phenomena
Correlation of Photocatalytic Bactericidal Effect and Organic Matter Degradation of TiO2 Part I: Observation of Phenomena
复制标题
TiO2光催化杀菌效果与有机物降解的相关性第一部分：现象观察
DOI：
10.1021/es802499t
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发表时间：
2009-02-15
影响因子：
11.4
通讯作者：
Zhang, Yinping
中科院分区：
文献类型：
--
作者：
Chen, Fengna;Yang, Xudong;Zhang, Yinping
本研究的目的是调查的相关性的光催化氧化效果的分解有机物和灭活细菌使用两种不同的TiO2材料：德固赛P25粉末薄膜和商业TiO2薄膜。被破坏的有机物为甲醛，试验菌为大肠杆菌。coli（JM 109株）。分别在平板反应器中和TiO2表面上进行了分解试验和杀菌试验。实验结果表明，光催化降解甲醛和灭活大肠杆菌的两个过程之间存在明显的相关性。杆菌然而，区分微生物灭活的确切驱动因素是至关重要的，其中紫外线照射和活性氧反应都是消毒的直接因素，而对于有机物，只有活性氧反应有助于降解。本研究的观察结果将使使用类比作为一种潜在的方法来评价基于有机化合物的抗菌效果成为可能。降解效果，从而后者更容易定量测量。
This study aims to investigate the correlation of the photocatalytic oxidation effect of decomposing organic matter and inactivating bacteria using two different TiO2 materials: a Degussa P25 powder film and a commercial TiO2 thin film. The destructed organic matter was formaldehyde and the test bacterium was E. coli (JM 109 strain). The decomposition tests and the bactericidal tests were carried out in a plate reactor and on the TiO2 surface, respectively. Observations indicate that there exists an apparent correlation between the two photocatalytic processes of decomposing formaldehyde and inactivating E. coli. However, it is essential to distinguish the exact driver for microbe inactivation, in which both UV light irradiation and reactive oxygen species reaction are direct factors of disinfection, and for organic matter, in which only reactive oxygen species reaction contributes to degradation. Observations from this study would make it possible to use analogy as a potential method to evaluate the antimicrobial effect based on the organic compound. degradation effect, whereby the latter is much easier to measure quantitatively.