Preparation, characterization and photocatalytic performance of K₈[Co(H₂O)W₁₁CdO₃₉]/PANI/V₂O₅ ternary composite

Abstract

A new ternary composite, K₈[Co(H₂O)W₁₁CdO₃₉]/PANI/V₂O₅, was synthesized by electrostatic self-assembly; K₈[Co(H₂O)W₁₁CdO₃₉] was prepared by direct synthesis method, PANI/V₂O₅ was prepared by coating polyaniline (PANI) on the surface of V₂O₅ particles using chemical oxidation method and (NH₄)₂S₂O₈ as the oxidant. First, the catalyst was characterized by infrared (IR) spectroscopy, ultraviolet-visible spectroscopy, X-ray diffraction, scanning electron microscopy and N₂ adsorption-desorption. Then, its photocatalytic performance was discussed by degradation of Congo Red as an organic pollutant. The results showed that K₈[Co(H₂O)W₁₁CdO₃₉]/PANI/V₂O₅ was successfully composited and its Keggin structure still remained; its decolorization of Congo Red was up to 93.32% with initial concentration of Congo Red of 5 mg/L, pH = 2 and the catalyst was 5 mg. After recycling three times, the ternary composite catalyst maintains good catalytic activity. Therefore, this new ternary composite catalyst has excellent application potential.

Graphical Abstract

Keywords:

• PANI/V₂O₅
• photocatalytic experiment
• ternary composite materials
• Congo Red

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The authors are thankful to the University of Qiqihar for supporting this work.