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| Titel |
Bactericidal Mechanisms of Ag2O/TNBs under both Dark and Light Conditions |
| VerfasserIn |
Yinjia Jin, Zhaoyi Dai, Fei Liu, Hyunjung Kim, Meiping Tong, Yanglong Hou |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250073439
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| Zusammenfassung |
| Ag2O deposited titanium dioxides nanobelts (Ag2O/TNBs) were fabricated and used to
investigate the toxic effects on aquatic microorganisms. The disinfection activities of
Ag2O/TNBs on two representative bacterial strains: Gram-negative E. coli and Gram-positive
B. subtilis, were examined under both dark and light conditions. Ag2O/TNBs exhibited
stronger bactericidal activities than TNBs under both dark and light conditions. For both cell
types, disinfection effects of Ag2O/TNBs were greater under light conditions relative to those
under dark conditions. The bactericidal mechanisms of Ag2O/TNBs under both dark and
light conditions were explored. Under dark conditions, neither Ag+ ions released from
Ag2O/TNBs nor TNBs contributed to the bactericidal activities of Ag2O/TNBs.
Under light conditions, both the released Ag+ions and TNBs yet were found to have
contributions to the bactericidal effects of Ag2O/TNBs. Active species (H2O2,
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O2-, ande-) generated by Ag2O/TNBs played important roles in the disinfection
processes under both dark and light conditions. Without the presence of active species,
the direct contact of Ag2O/TNBs with bacterial cells had no bactericidal effect. |
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