2009
DOI: 10.1016/j.cattod.2009.06.018
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Decontamination and disinfection of water by solar photocatalysis: Recent overview and trends

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Cited by 2,665 publications
(1,612 citation statements)
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References 285 publications
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“…These results are in contrast to those previously reported about photocatalytic disinfection of bacteria by semiconductors, such as TiO 2 -based photocatalysts 28 . In those photocatalysts, photogenerated reactive oxygen species (ROS) were believed to be the 'killers' of bacteria, where the cell wall of bacteria adsorbed onto semiconductors could be quickly damaged by ROS through photocatalytic oxidation reactions 29,30 . Because of the short lifetime of ROS, only those microorganisms with an immediate contact with semiconductors are threatened 31 .…”
Section: Discussionmentioning
confidence: 99%
“…These results are in contrast to those previously reported about photocatalytic disinfection of bacteria by semiconductors, such as TiO 2 -based photocatalysts 28 . In those photocatalysts, photogenerated reactive oxygen species (ROS) were believed to be the 'killers' of bacteria, where the cell wall of bacteria adsorbed onto semiconductors could be quickly damaged by ROS through photocatalytic oxidation reactions 29,30 . Because of the short lifetime of ROS, only those microorganisms with an immediate contact with semiconductors are threatened 31 .…”
Section: Discussionmentioning
confidence: 99%
“…This enhanced inactivation could be due to several different processes: (1) the diffusion of H 2 O 2 into the cell and (2) direct attack from H 2 O 2 to the cell membrane. The photolysis process of H 2 O 2 does not play a role in bacterial inactivation because photon absorption of H 2 O 2 is not significant at the wavelength used (l > 290 nm) and the quantum yield is low (Spuhler et al, 2010;Malato et al, 2009). On the other hand, when H 2 O 2 is present in the extracellular medium, its diffusion into the cell is possible since it is a stable and uncharged molecule.…”
Section: E Coli Inactivation In Milli-q Watermentioning
confidence: 99%
“…Compound oxidation by means of HO  , which also occurs in the environment, may involve several reactions that take place in a non selective way: eletrophilic addition at unsaturated C-C bonds or in aromatic rings (HO  + R → HOR  ), electron transfer (HO  + R → R + + HO -), and hydrogen abstraction at C-H, N-H and O-H bonds (HO  + RH → R  + H 2 O). Additionally, organic radicals generated may react with atmospheric oxygen to form peroxy radicals that generate further oxidative transformations (R  + O 2 → RO 2  → CO 2 + products) that contribute to the complete mineralization of the organic matter (Legrini et al, 1993;Malato et al, 2009). …”
Section: Introductionmentioning
confidence: 99%