Preparation of Ag/β-cyclodextrin co-doped TiO2 floating photocatalytic membrane for dynamic adsorption and photoactivity under visible light

The floating Ag/β-CD co-doped TiO2 photocatalytic membrane exhibited outstanding dynamic adsorption and photoactivity including remarkable degradation and efficient self-cleaning ability under visible light irradiation. [Display omitted] •The floating Ag/β-CD PM was prepared by a modified photoreduction and an in situ hydrothermal method.•A dynamic on-line adsorption system was established and adsorption behavior was investigated in detail.•The PM exhibited remarkable visible light-responsive photoactivity in a dynamic photocatalytic system.•The PM possessed outstanding self-cleaning performance for oleic acid-contaminated surface.•The photocatalytic mechanism was mainly attributed to the synergic effect of Ag and β-CD. Ag and β-CD co-doped TiO2 floating photocatalytic membrane (PM) was prepared through a modified electrospinning process coupled with a low-temperature in situ hydrothermal method. A dynamic on-line adsorption system was established by fixing the PM in a detachable syringe connected with a peristaltic pump. The adsorption capacity, degradation and self-cleaning property under visible light, and photocatalytic mechanism were investigated. The adsorption behavior fitted well with Langmuir mode and the adsorption capacity of 12.1567 mg g−1 was mainly attributed to the participation of β-CD and TiO2 internal mesopores. As a result of the synergistic effect of Ag and β-CD, the floating PM exhibited active visible light-responsiveness and remarkable photoactivity for the degradation of unsymmetrical dimethylhydrazine, and the outstanding self-cleaning performance for oleic acid-contaminated surface. It is believed that the floating PM holds great potential for dealing with wastewater containing organic pollutant.