Journal
JOURNAL OF MATERIALS SCIENCE
Volume 50, Issue 24, Pages 8111-8119Publisher
SPRINGER
DOI: 10.1007/s10853-015-9383-4
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Funding
- Natural Science Foundation of China [212 71055]
- Open Project of State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [QAK201304]
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Ultra-thin hexagonal tungsten trioxide (h-WO3) sheet has been synthesized with the assistance of urea. Some measurements have been carried out for sample characterization, such as XRD, TEM, AFM, FT-IR, Raman, XPS, and Zeta potential. It is shown that urea not only acts as pH regulator and stabilizer for the generation of a metastable hexagonal phase, but also plays an important role on the formation of ultra-thin sheet. The detailed formation mechanism has been discussed. The TEM and AFM tests show the thickness of ultra-thin h-WO3 nanosheet which is about 5 nm and the size is about 20-120 nm. Such size is favorable for photocatalytic reaction. Photodegradation RhB is carried out for investigating the photocatalytic activity of as-prepared sample. The ultra-thin h-WO3 sheet displays superior photocatalytic activity, more excellent photocatalytic activity than other shape samples due to its unique structure.
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