Silver phosphate and carbon nitride composite photocatalytic filter material and preparation method thereof

Abstract

The invention discloses a silver phosphate and carbon nitride composite photocatalytic filter material and a preparation method thereof.The silver phosphate and carbon nitride composite photocatalytic filter material comprises a bottom layer, a surface layer and a base cloth layer, the bottom layer and the surface layer are PTFE needling filter materials, the base cloth layer is PTFE base cloth, and an Ag3PO4 / g-C3N4 composite photocatalyst is evenly loaded in PTFE fibers. The silver phosphate and carbon nitride composite photocatalytic filter material comprises the following production raw materials in parts by weight: 2-6 parts of silver nitrate, 2-6 parts of melamine, 1-2 parts of sodium dihydrogen phosphate, 1-1.5 parts of an adhesive, 6-8 parts of a PTFE emulsion and 10-20 parts of PTFE short fibers. According to the silver phosphate and carbon nitride composite photocatalytic filter material disclosed by the invention, an Ag3PO4 / g-C3N4 composite photocatalyst is prepared, so that a Z-type heterostructure is formed, and the phenomenon that Ag < + > captures e <-> and is reduced into an Ag elementary substance is effectively reduced; the photocatalyst is combined with the dust removal filter bag to prepare the dust removal and dioxin removal integrated functional filter bag, and the Ag3PO4 / g-C3N4 composite photocatalyst loaded in the filter material can effectively remove dioxin in flue gas besides having a good dust removal function.

Description

technical field [0001] The invention relates to a filter material, in particular to a silver phosphate carbon nitride composite photocatalytic filter material and a preparation method thereof. Background technique [0002] Due to the immature garbage classification in the waste incineration industry, a large amount of dioxin substances will be produced during the waste incineration process. At present, activated carbon adsorption is mostly used to remove dioxins. Photocatalytic technology is a new advanced oxidation technology. Photocatalysts can make dioxins After the oxins absorb light energy, the speed of chemical bond breaking is accelerated, and then they are decomposed and removed. The essence of this process is that photocatalysts easily generate electron and hole pairs after absorbing light energy, and the holes are easy to react with water and hydroxide adsorbed on the surface of the catalyst to produce strong oxidizing hydroxyl groups. The reaction of this hydroxy...

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Problems solved by technology

TiO 2 As a photocatalyst that reacts under ultraviolet light, it has a wide range of applications due to its low price, while anatase TiO2 has a wide band gap (3.23eV), and can only be excited by ultraviolet light with a wavelength less than 387nm to generate light. Catalytic activity, low light source utilization

The energy of ultraviolet light only accounts for 4% of the total energy of sunlight, which makes the utilization rate of sunlight very low. According to the patent, by configuring TiO 2 / PTFE emulsion, TiO 2 Loaded on the surface of polyester needle-punched filter material to obtain photocatalytic filter material

This method converts TiO 2 load, due to the TiO 2 It is a solid itself, and it is easy to precipitate in the emulsion, so the photocatalytic filter material prepared by this method distributes TiO 2 uneven

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