Ag-TON nanospheres coupled with fly ash cenospheres for wastewater treatment under visible light irradiation

Yan Ma, Zhihuan Zhao, Jimin Fan, Zhanyong Gu, Bin Zhang, Shu Yin

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Using tetra-n-butyl titanate as raw material and fly ash cenospheres (FAC) as carrier, the photocatalysts of Ag-TON/FAC were successfully prepared by solvothermal and in-situ hydrolysis method. These visible light photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), fluorescence spectroscopy (FL) and UV–vis diffuse reflectance spectra (DRS). In this study, methyl orange and ciprofloxacin were used as wastewater degradation targets to investigate the effect of the amount of titanium dioxide and the amount of Ag doping on the activity of photocatalysts. On the basis of this, the optimal ratio of TiO2 to FAC was 2:1 and the optimum doping ratio of Ag was determined to be 15 wt.%. The composite photocatalysts dispersed uniformly and were easy to recycle and reuse, which were benefits in fully utilizing the solar energy. The degradation efficiency remained at more than 60% after being renewed five times for MO and ciprofloxacin. The photocatalysts of Ag-TON/FAC can reduce the environmental burden caused by FAC also.

Original languageEnglish
Pages (from-to)2321-2327
Number of pages7
JournalWater Science and Technology
Volume78
Issue number11
DOIs
Publication statusPublished - 2018 Dec 28

Keywords

  • Fly ash cenospheres
  • Photocatalytic activity
  • Visible light
  • Wastewater treatment

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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