Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 555, Issue -, Pages 605-614Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2018.07.016
Keywords
Titanate nanotubes; Activated carbon fibre; Methylene blue; Organic pollution; Photodegradation
Categories
Funding
- Natural Science Foundation of Hubei Province, China [2018CFB515]
- basic scientific research special fund of non-profit research institutions at the central level of China [HKY-JBYW-2016-05]
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A novel composite material which is referred to as activated carbon fibre supported titanate nanotubes (TNTs@ACF) was used for the removal of methylene blue (MB) from water through the combined adsorption and photocatalysis. TNTs@ACF was synthesized through a one-step hydrothermal method, which was composed of the activated carbon fibre as the skeleton and supported titanate nanotubes. TNTs@ACF showed a large surface area of 540.7 m(2)/g, thus, facilitating adsorption and interaction with MB. TNTs@ACF could first preconcentrate MB molecules onto the material and then degrade under UV light irradiation. The first-order model simplified from the Langmuir-Hinshelwood (L-H) model can well describe the photodegradation of MB on TNTs@ACF. Moreover, TNTs@ACF could be reused without significant capacity loss by UV light photo-regenerated. The structure and morphology of TNTs@ACF were indicated by TEM, SEM, and EDS, and it is found that TNTs were highly dispersed on the surface of ACF. XRD, FTIR, and XPS analyses of TNTs@ACF before and after the MB photodegradation also indicated the stability of the material. The combined adsorption and photodegradation suggests that TNTs@ACF is an attractive material for maintainable remediation of organic pollution in the environment.
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