Air plasma treated TiO2/MWCNT composite for enhanced photocatalytic activity

[Display omitted] •The TiO2/CNT composites have been prepared successfully by the hydrothermal method.•Surface of the composites was modified by using amient plasma.•Photocatalytic activity of the composite increased from 4 to 35% for methylene blue.•Photocatalytic activity of the composite increase...

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Bibliographic Details
Published in:Chemical physics letters 2020-10, Vol.757, p.137850, Article 137850
Main Authors: Chinonso, Ugwumadu, Ibukun, Olaniyan, Kyung Jeong, Hae
Format: Article
Language:English
Subjects:
Air plasma
CNT
Methylene blue
Photocatalysis
TiO2
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Summary:[Display omitted] •The TiO2/CNT composites have been prepared successfully by the hydrothermal method.•Surface of the composites was modified by using amient plasma.•Photocatalytic activity of the composite increased from 4 to 35% for methylene blue.•Photocatalytic activity of the composite increased from 9 to 40% for methyl blue. Multi-walled carbon nanotubes were loaded into titanium dioxide by the hydrothermal method followed by surface modifications using air plasma for enhanced photocatalytic activity. Methyl blue (MB-1) and methylene blue (MB-2) photodegradation under UV and visible light were investigated, resulting that optimal MB-1 and MB-2 degradation was achieved after 90 and 140 min under the UV and was enhanced from 9% to 40% and from 4% to 35% under the visible light. UV photocurrent response was enhanced by three times compared to the precursor because of the plasma treatment, providing higher surface area, lower impedance, bandgap modulation, and more active sites.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2020.137850