阅读说明：本技术 一种净化空气用光催化活性炭颗粒的制备方法 (Preparation method of photocatalytic active carbon particles for purifying air ) 是由 黄永忠 黄雨娴 于 2019-12-20 设计创作，主要内容包括：本发明公开一种净化空气用光催化活性炭颗粒的制备方法,包括以下重量份的各组分制备而成：煤质活性炭粉30-50份,纳米二氧化钛粉5-10份,玻璃纤维5-10份,450-550目滑石粉20-40份,固含量为20%的硅溶胶10-20份；将上述组分混合搅匀后造粒成型、30-100℃烘干,然后浸入质量百分比浓度为0.01-0.1%的氯金酸水溶液中10-120分钟,取出25-60℃烘干即可制备得到净化空气用光催化活性炭颗粒；本发明操作简单,原材料易得,制作成本低,在空气净化领域具有广阔的应用前景。(The invention discloses a preparation method of photocatalytic active carbon particles for purifying air, which comprises the following components in parts by weight: 30-50 parts of coal activated carbon powder, 5-10 parts of nano titanium dioxide powder, 5-10 parts of glass fiber, 20-40 parts of 450-mesh 550-mesh talcum powder and 10-20 parts of silica sol with the solid content of 20%; mixing the above components, stirring, granulating, molding, drying at 30-100 deg.C, soaking in 0.01-0.1% chloroauric acid water solution for 10-120 min, taking out, and drying at 25-60 deg.C to obtain photocatalytic active carbon granule for purifying air; the method has the advantages of simple operation, easily obtained raw materials, low manufacturing cost and wide application prospect in the field of air purification.)

1. The preparation method of the photocatalytic active carbon particles for purifying air is characterized by comprising the following components in parts by weight: 30-50 parts of coal activated carbon powder, 5-10 parts of nano titanium dioxide powder, 5-10 parts of glass fiber, 20-40 parts of 450-mesh 550-mesh talcum powder and 10-20 parts of silica sol with the solid content of 20%;

mixing the above components, stirring, granulating, molding, drying at 30-100 deg.C, soaking in 0.01-0.1% chloroauric acid water solution for 10-120 min, taking out, and drying at 25-60 deg.C to obtain photocatalytic active carbon granule for purifying air.

2. The preparation method of photocatalytic active carbon particles for purifying air as claimed in claim 1, wherein the following components are weighed in parts by weight: 50 parts of coal activated carbon powder, 10 parts of nano titanium dioxide powder, 10 parts of glass fiber, 40 parts of 500-mesh talcum powder and 20 parts of silica sol with the solid content of 20 percent;

the components are mixed and stirred evenly, granulated, formed, dried at 100 ℃, then immersed into chloroauric acid water solution with the mass percentage concentration of 0.1 percent for 120 minutes, taken out and dried at 60 ℃ to prepare the photocatalytic active carbon particles for purifying air.

3. The method for preparing photocatalytic activated carbon particles for purifying air according to claim 1, wherein the particle size of the granulated and formed particles is 2 to 10 mm.

4. The method of claim 1, wherein the coal-based activated carbon powder has a particle size of 1-150um and an average particle size of 40 um.

5. The method for preparing photocatalytic activated carbon particles for purifying air according to claim 1, wherein the nano titanium dioxide powder is in an anatase crystal form and has a particle size of not more than 100 nm.

Technical Field

The invention relates to the technical field of air purification materials, in particular to a preparation method of photocatalytic active carbon particles for purifying air.

Background

At present, various activated carbon products for purifying air exist in the market, but the number of the photocatalytic activated carbon particle products is relatively small, part of the photocatalytic activated carbon particle products are prepared by mainly taking titanium-based liquid or titanium dioxide sol liquid as a precursor solution and carrying out the working procedures of soaking, drying, high-temperature treatment and the like, and the photocatalytic loading method mainly comprises a powder sintering method, a dip-coating method, a sol-gel method, a chemical vapor deposition method and the like. Although the TiO2 prepared by the methods has small and uniform particle size and high photocatalytic activity, the method has complex process, great technical difficulty and high cost, especially has large energy consumption through high-temperature crystallization sintering at the temperature of over 600 ℃, the improper sintering and crystallization treatment easily causes poor binding firmness of the titanium dioxide film and the activated carbon to fall off or fall off, titanium dioxide crystals of photocatalytic active carbon particles prepared by the processes are all attached to the surface of the activated carbon and rarely enter an activated carbon adsorption inner layer, and the equipment cost and the process conditions cause great popularization and application difficulty.

The photocatalyst or activated carbon particle catalyst prepared by mixing titanium dioxide powder and activated carbon powder is also subjected to a high-temperature treatment step. For example, CN108722388A discloses a photocatalyst for air purification. The catalyst is prepared by mixing zinc oxide, activated carbon and titanium dioxide powder and then firing at a high temperature. Meanwhile, the activated carbon particles in the market have the defects of poor water resistance, low mechanical strength, low light utilization rate and the like. When the active carbon particles with poor water resistance are exposed to water or a humid environment for a long time, the surface of the active carbon can crack and pulverize to influence the photocatalytic film on the outer surface layer of the active carbon.

The photocatalytic degradation of organic matters requires oxygen molecules (O) in the air₂) Or water molecules (H)₂O) and generate free radicals with strong oxidizing properties such as oxygen radicals (. O)₂) And hydroxyl radicals (. OH). The free radicals can sterilize or inhibit bacteria, decompose organic pollutants, and finally decompose and mineralize the organic matters into nontoxic water (H)₂O) and carbon dioxide (CO)₂) Thereby having strong sterilization, deodorization and preventionThe mould and the air purifying function, and the sufficient oxygen molecules or water molecules can greatly improve the air purifying efficiency of decomposing organic matters. Therefore, the adsorption performance of the activated carbon particles to water molecules influences the efficiency of photocatalytic degradation of organic pollutants.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art: provides a preparation method of photocatalytic active carbon particles for purifying air, which has high purification efficiency and good water resistance and water molecule adsorption performance.

The technical solution of the invention is as follows: a preparation method of photocatalytic activated carbon particles for purifying air comprises the following components in parts by weight: 30-50 parts of coal activated carbon powder, 5-10 parts of nano titanium dioxide powder, 5-10 parts of glass fiber, 20-40 parts of 450-mesh 550-mesh talcum powder and 10-20 parts of silica sol with the solid content of 20%.

Mixing the above components, stirring, granulating, molding, drying at 30-100 deg.C, soaking in 0.01-0.1% chloroauric acid water solution for 10-120 min, taking out, and drying at 25-60 deg.C to obtain photocatalytic active carbon granule for purifying air.

The particle size of the granulation molding is 2-10 mm.

The nano titanium dioxide powder is in an anatase crystal form, and the particle size is not more than 100 nm.

The granularity range of the coal activated carbon powder is 1-150um, and the average grain diameter is 40 um.

The invention has the beneficial effects that: glass fiber and talcum powder are introduced into the preparation of photocatalytic active carbon particles, silica gel is used for curing and forming, the photocatalytic active carbon particles with better water resistance and strength can be prepared at low temperature, the light absorption rate is improved through the light refraction and transmission effects of the glass fiber, the space photocatalytic reaction of a photocatalytic adsorption layer on the inner surface of the active carbon is promoted, the photocatalytic reaction is facilitated, the photocatalytic efficiency is improved, the active carbon particles are soaked in chloroauric acid aqueous solution, nanogold can be deposited on the surfaces of the active carbon and titanium dioxide to play the roles of promoting organic matter adsorption, resisting bacteria, sterilizing, decomposing organic matters through photocatalysis and the like, and the effect of the method is embodied in two aspects: the nano gold is deposited in the active carbon particles to promote the adsorption of organic molecules and the antibacterial and bactericidal effects; the nano gold is deposited on the surface of the titanium dioxide, so that the photocatalytic efficiency can be improved. The preparation method disclosed by the invention is simple to operate, the raw materials are easy to obtain, the preparation cost is low, and the preparation method has a wide application prospect in the field of air purification.

Detailed Description

The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples.