A Novel High Efficient Catalyst AgBr/CaMoO₄ for the Reduction of p‐Nitrophenol

Abstract

A new composite catalyst AgBr/CaMoO4 was successfully fabricated by loading AgBr nanoparticles on CaMoO4 support via a convenient precipitation/deposition method, without any controlling agent and template. The microstructure, chemical composition, and morphologies of the AgBr/CaMoO4 were characterized by X‐ray diffraction, Fourier transform infrared, X‐ray photoelectron spectroscopy, and scanning electron microscopy. A series of comparative experiments showed that the composite AgBr/CaMoO4 exhibits higher catalytic activity than pure AgBr or CaMoO4 for the reduction of p‐nitrophenol (4‐NP). Moreover, the AgBr content greatly impacted the catalytic activity of composite AgBr/CaMoO4 . The conversion rate of 4‐NP with AgBr/CaMoO4 ‐5% as catalyst could reach 100% within only 4 min, which might be attributed to more number of available active sites from the highly dispersed AgBr nanoparticles on the surface of CaMoO4 microspheres. In addition, the composite catalyst AgBr/CaMoO4 displayed a good structural and cycling stability. The present study might provide a new strategy to design composite materials with excellent catalytic performance.