Preparation of heteropolyacid/TiO2/fly-ash-cenosphere photocatalyst for the degradation of ciprofloxacin from aqueous solutions

► The fly-ash cenospheres for carrier are able to solve the problem of hard recycling. ► The photocatalyst modified with H4SiW12O40 shows superior photocatalytic activity. ► The photocatalyst could represent some selectivity for target pollutants.