Preparation And Photocatalytic Performances Of Silver Phosphate Nanomaterials

Semiconductor photocatalysts have been widely used in the catalytic degradation of organic pollutants in water. It is a hot topic on water environmental pollution control to synthesize the photocatalysts which possess high catalytic activity, high catalytic efficiency and there are no poisonous waste under visible light. In the thesis, Ag3PO4, GO-Ag3PO4 and Au-ZnO nano composites have been synthesized and their structures and performances have been dealt with as well, the main research work and the results are as follows:1. Synthesis and photocatalytic performances of Ag3PO4 nanoparticleAg3PO4 nanoparticles were synthesized by AgNO3 and H3PO4 in PVP and OAm, and the nanosize and morphology of Ag3PO4 nanoparticles were adjusted by PVP. The results indicated that when the PVP is 0.5g under the given reactant components, the morphologies of Ag3PO4 nanoparticles are uniform, which possesses widely UV-visible diffuse reflectance adsorption and there is the best catalytic properties in the range of visible light.2. Fabrication and photocatalytic performance of GO-Ag3PO4 compositesThe uniform Ag3PO4 particles were loaded with ultrasonic dispersion technique on the surface of flake-like grapheme (GO), which as a carrier, formation the GO-Ag3PO4 composites. The results showed that the GO could enhance the photocatalytic performance of Ag3PO4 particles and the adsorption Ag3PO4 particles could red shifts from 530 nm to 580 nm, when the relative content of GO is 5 wt% in GO-Ag3PO4 composite, the photodegradation activity of GO-Ag3PO4 composite for RhB is best in the visible light range.3. The structure morphology and photocatalytic properties of Ag3PO4The Ag3PO4 cubic crystals with three different morphologies were fabricated by changing the solvents and surfactants in [Ag(NH3)2]+. The results showed that the Ag3PO4 with rough porous surface or round off the angles presented more superior photocatalytic compared with the Ag3PO4 cubic crystals due to the specific surface area of (110).4. Synthesis and photocatalytic properties of Au-ZnO compositeSix prismatic Au-ZnO composite was synthesized with Zn(Ac)2、HAuCl4 by one-step method in diethylene glycol (DG) solution. The morphology of Au-ZnO can be adjusted from irregular mulberry to six prismatic by changing gold chloride acid. The results showed that the catalytic activity and catalytic efficiency of Au-ZnO are all better than that of ZnO nano particles for photodegradation RhB, and when the relative content of Au is 2.11% in the composite, the photocatalytic performances is the better than others.