Visible light photodegradation of formaldehyde over TiO nanotubes synthesized via electrochemical anodization of titanium foil
Nanomaterials, ISSN: 2079-4991, Vol: 10, Issue: 1
2020
- 37Citations
- 55Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Metrics Details
- Citations37
- Citation Indexes37
- 37
- CrossRef34
- Captures55
- Readers55
- 55
Article Description
In this study, a series of TiO nanotubes (NTs) were synthesized employing electrochemical anodization of titanium foil in an ionic liquid solution containing a mixture of glycerol and choline chloride, acting as electrolyte. The as-synthesized TiO NTs were calcined at 350, 450, or 550 C for a 2 h duration to investigate the influence of calcination temperature on NTs formation, morphology, surface properties, crystallinity, and subsequent photocatalytic activity for visible light photodegradation of gaseous formaldehyde (HCHO). Results showed that the calcination temperature has a significant effect on the structure and coverage of TiO NTs on the surface. Freshly synthesized TiO NTs showed better-ordered structure compared to calcined samples. There was significant pore rupture with increasing calcination temperature. The transformation from anatase to rutile phase appeared after calcination at 450 C and the weight fraction of the rutile phase increased from 19% to 36% upon increasing the calcination temperature to 550 C. The band gaps of the TiO NTs were in the range from 2.80 to 2.74 eV, shifting the active region of the materials to visible light. The presence of mixed anatase–rutile TiO phases in the sample calcined at 450 C showed enhanced photoactivity, which was confirmed by the 21.56 mg·L removal of gaseous formaldehyde under 120 min of visible light irradiation and displayed enhanced quantum yield, θ of 17%.
Bibliographic Details
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