Quaternary Ag/AgCl/TiO_2/MWCNTs nanocomposite: an efficient visible-lightdriven plasmonic photocatalyst for degradation of 2,4-dichlorophenol

摘要

In this research, we developed a facile method to synthesize quaternary plasmonic photocatalysts Ag/AgCl/TiO2/MWCNTs with a high photocatalytic performance for degradation of 2,4-dichlorophenol (2,4-DCP) under visible light. The prepared samples were characterized by different analyses such as X-ray diffraction, scanning electron microscopy, energy dispersive X-ray, ultraviolet-visible diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy, N-2 physisorption, and transmission electron microscopy. The prepared samples exhibited highly visible-light photocatalytic efficiency for degradation of 2,4-DCP in aqueous solution. In the presence of pure TiO2 and quaternary Ag/AgCl/ TiO2/MWCNTs nanocomposite, we obtained 40% and almost 100% degradations of 2,4-DCP under visible light after 180 min irradiation, respectively. The excellent visible light photocatalytic activity of Ag/AgCl/TiO2/MWCNTs samples can be attributed to the surface plasmon resonance effect of Ag nanoparticles anchored on AgCl particles and adsorption ability of MWCNTs.