Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Controlled defects of zinc oxide nanorods for efficient visible light photocatalytic degradation of phenol
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Functional Materials, FNM.ORCID iD: 0000-0002-0074-3504
2016 (English)In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 9, no 4, 238Article in journal (Refereed) Published
Resource type
Text
Abstract [en]

Environmental pollution from human and industrial activities has received much attention as it adversely affects human health and bio-diversity. In this work we report efficient visible light photocatalytic degradation of phenol using supported zinc oxide (ZnO) nanorods and explore the role of surface defects in ZnO on the visible light photocatalytic activity. ZnO nanorods were synthesized on glass substrates using a microwave-assisted hydrothermal process, while the surface defect states were controlled by annealing the nanorods at various temperatures and were characterized by photoluminescence and X-ray photoelectron spectroscopy. High performance liquid chromatography (HPLC) was used for the evaluation of phenol photocatalytic degradation. ZnO nanorods with high surface defects exhibited maximum visible light photocatalytic activity, showing 50% degradation of 10 ppm phenol aqueous solution within 2.5 h, with a degradation rate almost four times higher than that of nanorods with lower surface defects. The mineralization process of phenol during degradation was also investigated, and it showed the evolution of different photocatalytic byproducts, such as benzoquinone, catechol, resorcinol and carboxylic acids, at different stages. The results from this study suggest that the presence of surface defects in ZnO nanorods is crucial for its efficient visible light photocatalytic activity, which is otherwise only active in the ultraviolet region.

Place, publisher, year, edition, pages
MDPI , 2016. Vol. 9, no 4, 238
Keyword [en]
zinc oxide, surface defect, oxygen vacancy, annealing, phenol, photocatalysis
National Category
Nano Technology
Identifiers
URN: urn:nbn:se:kth:diva-185139DOI: 10.3390/ma9040238ISI: 000375158900024Scopus ID: 2-s2.0-84965053830OAI: oai:DiVA.org:kth-185139DiVA: diva2:918334
Note

QC 20160411

Available from: 2016-04-11 Created: 2016-04-11 Last updated: 2016-05-31Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Dutta, Joydeep
By organisation
Functional Materials, FNM
In the same journal
Materials
Nano Technology

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 134 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf