Feasibility of silver doped TiO2/glass fiber photocatalyst under visible irradiation as an indoor air germicide.
Feasibility of silver doped TiO2/glass fiber photocatalyst under visible irradiation as an indoor air germicide.
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DOI：
10.3390/ijerph110303271
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发表时间：
2014-03-20
影响因子：
--
通讯作者：
Lee BK
中科院分区：
文献类型：
--
作者：
Pham TD;Lee BK
研究了溶胶-凝胶法制备的玻璃纤维负载Ag-TiO 2光催化剂（Ag-TiO 2/GF）作为室内空气杀菌剂的可行性。设计了一个实验模型，研究了Ag-TiO 2/GF光催化剂对韩国医院中最常见的细菌葡萄球菌（Staph）的细菌消毒效率。将Ag/TiO 2中的银含量从1%改变到10%，以研究Ag掺杂在TiO 2/玻璃纤维（TiO 2/GF）上用于光催化消毒葡萄球菌的最佳比例。研究表明，Ag在Ag-TiO 2/GF中可以作为电子阱或电子供体，提高光催化活性，促进TiO 2光吸收后产生的电子-空穴对的电荷分离。Ag还充当用于将光生电子从TiO 2的价带转移到受体（O2气体）以促进光氧化过程的中间剂。Ag-TiO 2/GF可见光催化杀菌活性随银含量的增加而增加，当银含量达到7.5%时，随银含量的进一步增加而略有下降。7. 5% Ag-TiO 2/GF对葡萄球菌的最高消毒效率为75.23%，最高消毒量为20（CFU·s-1·cm-2）。60% ± 5%的中等湿度水平比低湿度（40% ± 5%）或高湿度（80% ± 5%）水平显示出更好的光催化消毒。
This study investigated the feasibility of using Ag-TiO2 photocatalyst supported on glass fiber (Ag-TiO2/GF) prepared by a sol-gel method as an indoor air germicide. An experimental model was designed to investigate the bacterial disinfection efficiency of Staphylococcus (Staph), the most popular bacterium in hospitals in Korea, by the Ag-TiO2/GF photocatalyst. The silver content in Ag/TiO2 was altered from 1 to 10% to investigate the optimal ratio of Ag doped on TiO2/glass fiber (TiO2/GF) for photocatalytic disinfection of Staph. This study confirmed that Ag in Ag-TiO2/GF could work as an electron sink or donor to increase photocatalytic activity and promote the charge separation of electron-hole pairs generated from TiO2 after photon absorption. Ag also acts as an intermediate agent for the transfer of photo-generated electrons from the valence band of TiO2 to an acceptor (O2 gas) to promote photo-oxidation processes. The photocatalytic disinfection activity of Ag-TiO2/GF under visible light increased with the increase in silver content up to 7.5% and then slightly decreased with further increasing silver content. The highest disinfection efficiency and disinfection capacity of Staph using 7.5% Ag-TiO2/GF were 75.23% and 20 (CFU∙s−1∙cm−2) respectively. The medium level of humidity of 60% ± 5% showed better photocatalytic disinfection than the lower (40% ± 5%) or higher (80% ± 5%) levels.
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DOI：
10.1016/j.msea.2005.04.036
发表时间：
2005-08-25
影响因子：
6.4
作者：
Fu, YQ;Du, HJ;Huang, WM
通讯作者：
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影响因子：
6.7
作者：
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通讯作者：
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影响因子：
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影响因子：
22.1
作者：
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通讯作者：
Robertson, PKJ
DOI：
10.1016/j.jphotochem.2006.09.014
发表时间：
2007-03-05
影响因子：
4.3
作者：
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