A Novel High Efficient Catalyst AgBr / CaMoO 4 for the Reduction of p ‐Nitrophenol

A new composite catalyst AgBr / CaMoO 4 was successfully fabricated by loading AgBr nanoparticles on CaMoO 4 support via a convenient precipitation/deposition method, without any controlling agent and template. The microstructure, chemical composition, and morphologies of the AgBr / CaMoO 4 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 / CaMoO 4 exhibits higher catalytic activity than pure AgBr or CaMoO 4 for the reduction of p ‐nitrophenol (4‐ NP ). Moreover, the AgBr content greatly impacted the catalytic activity of composite AgBr / CaMoO 4 . The conversion rate of 4‐ NP with AgBr / CaMoO 4 ‐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 CaMoO 4 microspheres. In addition, the composite catalyst AgBr / CaMoO 4 displayed a good structural and cycling stability. The present study might provide a new strategy to design composite materials with excellent catalytic performance.