A new type of activated carbon fibre supported titanate nanotubes for high-capacity adsorption and degradation of methylene blue

作者：Wang, Qingrong; Lei, Xiaoman; Pan, Fei^*; Xia, Dongsheng; Shang, Yuji; Sun, Weiliang; Liu, Wen^*

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2018, 555: 605-614.

DOI：10.1016/j.colsurfa.2018.07.016

• Titanate nanotubes
• Activated carbon fibre
• Methylene blue
• Organic pollution
• Photodegradation

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.

• 出版日期2018-10-20
• 单位武汉纺织大学; 天津大学; 北京大学