Preparation of Nano Ag Loaded Wood Filter Material and Its Catalytic Degradation of Dyes

Abstract

Using porous light wood as raw material, Ag/wood composite filter material was prepared by loading metal Ag nano catalyst in wood matrix by in-situ reduction of silver ammonia solution. The catalytic degradation of organic pollutants in dye wastewater was realized by using the characteristics of high fluid transmission efficiency of wood and catalytic activity of silver nanoparticles. The morphology and structure of the material were characterized by scanning electron microscope, transmission electron microscope and X-ray diffraction, and the catalytic degradation of organic dye methylene blue by nano Ag loaded wood filter material was investigated. The results show that the prepared Ag/wood composite filter material retains the pore structure of wood, Ag nanoparticles are successfully loaded on the inner wall of the catheter and evenly distributed, and the particle size range is 5 nm-20 nm; The silver nanoparticles on the inner wall of the wood duct have good catalytic activity, and the wood filter material can effectively catalyze the degradation of methylene blue in water. Its degradation efficiency and water flux are closely related to the thickness of the filter material; The catalytic degradation efficiency of methylene blue by 6 mm thick filter material driven by gravity is 94.03%, and the water flux is up to 2600 L/(M2•h), which realizes the optimization of dye degradation efficiency and water flux. Nano Ag loaded wood filter material has the advantages of simple preparation process, low cost and large-scale. It has a good application prospect in the field of dye wastewater treatment.