Preparation and photocatalytic activity of Ag3PO4/attapulgite nano-composite photocatalyst under visible light
The Ag3PO4/attapulgite (ATP) photocatalysts composited by highly dispersed Ag3PO4 nanoparticles and purification ATP were prepared by a chemical precipitation method,which were sensitive to visible light and high activity.The photocatalysts were characterized by X-ray power diffraction,scanning electron microscope,UV-visible diffuse reflectance spectrometer,Fourier-transform infrared spectroscopy,thermogravimetric analyses and Brunauer-Emmet-Teller techniques to determine their phase structures and micromorphologies.The results showed that the high surface area of ATP promoted the dispersibility of Ag3PO4 nanoparticles with smaller size and absorption edge red-shift,which increased the reactive sites of Ag3PO4/ATP.When the loading amounts of Ag3PO4 nanoparticles nearly reached to 45% (mass fraction),the pseudo-first-order kinetic rate constant of composited photocatalysts to photocatalytic degradation of methylene blue mas 2.39 times of pure Ag3PO4 under the visible light.