Modulation of defect-mediated energy transfer from ZnO nanoparticles for the photocatalytic degradation of bilirubin
2013 (English)In: Beilstein Journal of Nanotechnology, ISSN 2190-4286, Vol. 4, no 1, 714-725 p.Article in journal (Refereed) Published
In recent years, nanotechnology has gained significant interest for applications in the medical field. In this regard, a utilization of the ZnO nanoparticles for the efficient degradation of bilirubin (BR) through photocatalysis was explored. BR is a water insoluble byproduct of the heme catabolism that can cause jaundice when its excretion is impaired. The photocatalytic degradation of BR activated by ZnO nanoparticles through a non-radiative energy transfer pathway can be influenced by the surface defect-states (mainly the oxygen vacancies) of the catalyst nanoparticles. These were modulated by applying a simple annealing in an oxygen-rich atmosphere. The mechanism of the energy transfer process between the ZnO nanoparticles and the BR molecules adsorbed at the surface was studied by using steady-state and picosecond-resolved fluorescence spectroscopy. A correlation of photocatalytic degradation and time-correlated single photon counting studies revealed that the defect-engineered ZnO nanoparticles that were obtained through post-annealing treatments led to an efficient decomposition of BR molecules that was enabled by Forster resonance energy transfer.
Place, publisher, year, edition, pages
BEILSTEIN-INSTITUT , 2013. Vol. 4, no 1, 714-725 p.
IdentifiersURN: urn:nbn:se:kth:diva-175191DOI: 10.3762/bjnano.4.81ISI: 000327716100001ScopusID: 2-s2.0-84888806241OAI: oai:DiVA.org:kth-175191DiVA: diva2:914345
QC 201604012016-03-232015-10-102016-04-01Bibliographically approved