Synergistic effects on BiFeO3 based cellulose acetate composite and efficient photocatalytic activities for wastewater treatment application

•Photocatalyst composite film comprises cellulose acetate (CA) supported bismuth ferrite (CA/BFO) was successfully fabricated via phase inversion technique.•The composite was employed to assess its removal efficiency towards the mixture of crystal violet (CV) and indigo carmine (IC) dyes under direct sunlight.•The influence of pH, amount of adsorbent, initial dye concentration, and contact time were investigated.•Furthermore, the approach composite can be a promising alternative for co-existence of cationic and anionic dyes removal from wastewater due to its high efficiency and separation convenience.