Preparation, characterization and properties of the ternary composite β₂-SiW₁₁/polyaniline/graphene oxide

Abstract

The composites β₂-SiW₁₁/GO and β₂-SiW₁₁/PANI/GO were prepared by using graphene oxide as a carrier. Properties of the composites were characterized by UV-visible spectroscopy (UV-vis), infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), scanning electron microscopy (SEM-EDS), transmission electron microscopy (TEM), N₂ adsorption desorption and thermal gravimetric analysis. Properties of the composites were investigated by using methyl violet simulated industrial wastewater. The results showed that this composite had photocatalytic activities for many dyes, and the activity was higher than that of Degussa P25(TiO₂). The photocatalytic performance of β₂-SiW₁₁/PANI/GO had a higher activity than that of PANI, β₂-SiW₁₁ and β₂-SiW₁₁/GO, with photodegradation reaching 95.98% under 30 W ultraviolet light for 150 min. The reaction kinetics for photocatalytic degradation of methyl violet followed a first-order process. The prepared composite was recyclable and the performance remained good. The possible mechanism of photocatalytic activity of dopant material is discussed and schematized.

Graphical Abstract

Keywords:

• Transition-metal substituted polyoxometallates
• graphene oxide
• capture agent
• photocatalytic

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

We are grateful for the financial support from the Science Foundation of Heilongjiang Provincial the Education Department for this work (no. 135309443).