Photocatalytic effects of TiO2 mesoporous coating immobilized on clay roofing tiles
Photocatalytic effects of TiO2 mesoporous coating immobilized on clay roofing tiles
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DOI：
10.1016/j.jeurceramsoc.2013.07.010
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发表时间：
2014
影响因子：
5.7
通讯作者：
M. Radeka;S. Markov;E. Lončar-;O. Rudić;S. Vučetić;J. Ranogajec
中科院分区：
文献类型：
--
作者：
M. Radeka;S. Markov;E. Lončar-;O. Rudić;S. Vučetić;J. Ranogajec
本研究的目的是研究固定在粘土屋面瓦表面的二氧化钛介孔涂层所产生的羟基自由基（游离和结合）的影响。通过微生物和光化学试验确定了涂层的效率。微生物试验（倾板法）采用试验菌假单胞菌铜绿假单胞菌，光化学试验采用高效液相色谱法监测对氯苯甲酸的降解。两个实验都是在没有和有清除剂（甲醇和叔丁醇）的情况下进行的。光催化效率的测量结果和观察到的接触角的变化（固滴法）表明，tio2涂层多孔基板存在光致亲水性。新设计的涂层代表了一种有效阻止细菌粘附的介质。实验结果表明，该介孔涂层具有自清洁和轻微自消毒的特性。
The objective of this study was to examine the effect of the hydroxyl radicals (free and bound) produced by a TiO2mesoporous coating immobilized on the surface of clay roofing tiles. The efficiency of the coating was determined by microbiological and photochemical tests. In the microbiological test (pour plate method), use was made of the test bacteriaPseudomonasaeruginosa, while the photochemical test involved the degradation of para-chlorobenzoic acid, monitored by HPLC method. Both experiments were carried out without and with a scavenger (methanol andtert-butanol). The results of the measurement of the photocatalytic efficiency, and the observed changes in the measured contact angle (sessile drop method), imply the existence of a photo-induced hydrophilicity of the TiO2coated porous substrates. The newly designed coating represents a medium which efficiently hinders bacterial adhesion. The experiments demonstrated the existence of self-cleaning and slight self-disinfecting properties of the mesoporous coating.