Enhancement of phage inactivation using photocatalytic titanium dioxide particles with different crystalline structures
Enhancement of phage inactivation using photocatalytic titanium dioxide particles with different crystalline structures
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DOI：
10.1016/j.bej.2006.01.004
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发表时间：
2006-03-01
影响因子：
3.9
通讯作者：
Taya, M
中科院分区：
文献类型：
--
作者：
Sato, T;Taya, M
为了研究晶体结构对TiO 2颗粒的生物杀灭活性的影响，在黑光灯照射下使用金红石型和金红石型TiO 2颗粒的混合物进行噬菌体MS 2的光催化失活。通过将一级动力学应用于噬菌体失活的时间曲线来确定表观失活速率常数W，并且发现V值在R-an = 70wt%的pH比下最大化。考虑到在TiO_2表面吸附的噬菌体颗粒的量q（T），还发现在R-an = 70wt%时的k ′/q（T）值分别是R-an = 0和100wt%时的4.3和5.4倍。噬菌体失活的动力学分析支持这样的考虑，即两种类型的TiO 2，颗粒之间的紧密接触导致量子产率的提高，从而增加TiO 2，光反应中活性氧的产生。(c)2006 Elsevier B. V.保留所有权利。
To investigate the effect of crystalline structures on biocidal activity of TiO2 particles, the photocatalytic deactivation of phage MS2 was conducted using the mixture of anatase- and rutile-type TiO2 particles under irradiation with a black light lamp. Apparent deactivation rate constant, W, was determined by applying the first-order kinetics to the time profiles of phage deactivation and the V value was found to be maximized at anatase ratio of R-an = 70 wt%. Considering the quantity of phage particles adsorbed on TiO2 surfaces, q(T), it was also found that the k'/q(T) value at R-an = 70 wt% was 4.3 and 5.4 times, respectively, as compared with those at R-an = 0 and 100wt%. The kinetic analysis of phage deactivation supported the consideration that the close contact between both types of TiO2, particles caused the enhancement of quantum yield and thereby the increased generation of reactive oxygen species in TiO2, photoreaction. (c) 2006 Elsevier B.V. All rights reserved.