Abstract:
:Here we report a high efficiency photocatalyst, i.e., Mn(2+)-doped and N-decorated ZnO nanofibers (NFs) enriched with vacancy defects, fabricated via electrospinning and a subsequent controlled annealing process. This nanocatalyst exhibits excellent visible-light photocatalytic activity and an apparent quantum efficiency up to 12.77%, which is 50 times higher than that of pure ZnO. It also demonstrates good stability and durability in repeated photocatalytic degradation experiments. A comprehensive structural analysis shows that high density of oxygen vacancies and nitrogen are introduced into the nanofibers surface. Hence, the significant enhanced visible photocatalytic properties for Mn-ZnO NFs are due to the synergetic effects of both Mn(2+) doping and N decorated. Further investigations exhibit that the Mn(2+)-doping facilitates the formation of N-decorated and surface defects when annealing in N2 atmosphere. N doping induce the huge band gap decrease and thus significantly enhance the absorption of ZnO nanofibers in the range of visible-light. Overall, this paper provides a new approach to fabricate visible-light nanocatalysts using both doping and annealing under anoxic ambient.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Wang Y,Cheng J,Yu S,Alcocer EJ,Shahid M,Wang Z,Pan Wdoi
10.1038/srep32711subject
Has Abstractpub_date
2016-09-07 00:00:00pages
32711issn
2045-2322pii
srep32711journal_volume
6pub_type
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