Preparation method of organic gas purification cloth

Abstract

The invention relates to a preparation method of organic gas purification cloth, and belongs to the field of air pollution purification materials. According to the method, the strontium oxide-gadolinium titanate composite active coating is prepared on the high-silica cloth subjected to acid pickling and hole fixing through the two steps of strontium oxide dipping deposition and gadolinium titanate spraying deposition, and the coating is tightly combined with the high-silica cloth and is evenly distributed on the surface of the high-silica cloth. The organic gas purification cloth prepared by the invention retains the original porous structure of the high silica cloth, and can adsorb organic gas in air; the strontium oxide-gadolinium titanate composite active coating can decompose the adsorbed organic gas under illumination, and release the high silica cloth surface occupied by the organic gas at the same time for a continuous air purification process.

Description

Technical Field

[0001] The invention belongs to the field of air pollution purification materials, and in particular relates to a method for preparing an organic gas purification cloth. Background Art

[0002] The air contains a variety of volatile organic gases, which pose a significant threat to human health. Organic pollutants in the air are usually purified by adsorption materials such as activated carbon to remove organic gases by adsorption. Since adsorption materials have a certain adsorption saturation capacity, they cannot be used when the organic gas adsorption is saturated and must be treated by a specific desorption regeneration process before they can be used again.

[0003] If the adsorbed organic gas molecules can be decomposed to release the adsorbent material surface, the organic gas in the air can be continuously purified without regeneration. This new technology makes continuous purification process possible, not only for industrial use, but also for home use, because for families, there is no condition to regenerate the adsorbent material. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention aims to provide a method for preparing an organic gas purification cloth, which can be used to purify organic gases in the air.

[0005] The technical solution adopted by the present invention is: a method for preparing an organic gas purification cloth, comprising the following process steps:

[0006] Step 1: Pickling and fixing holes with high silica cloth

[0007] Add 350mL of 0.15-0.20mol / L hydrochloric acid solution into a beaker, immerse the high-silica cloth in the hydrochloric acid solution, heat the solution to 50°C, and keep it warm for 60 minutes; take out the acid-washed high-silica cloth from the hydrochloric acid solution, wash it with pure water, and then dry it in a 120°C oven for 15 hours; calcine the dried high-silica cloth at 820-830°C for 2 hours to obtain the acid-washed fixed-pore high-silica cloth;

[0008] Step 2: Impregnation deposition of strontium oxide

[0009] Add 5.6-6.7g of strontium chloride and 1.8-2.1g of sodium bicarbonate to 200mL of pure water, respectively, and stir to form solution A; immerse the acid-washed high-silica cloth with fixed holes in solution A, heat the solution to 55°C, and keep it warm for 60 minutes; take out the high-silica cloth, dry it in an oven at 120°C for 10 hours, and then calcine it at 750-770°C for 2 hours to obtain a high-silica cloth with deposited strontium oxide;

[0010] Step 3: Spray deposition of gadolinium titanate

[0011] 3.3-3.6 mL of n-butyl titanate, 1.2-1.3 g of emulsifier Span80, and 1.5-1.7 mL of tributyl borate were added to 100 mL of ethanol and stirred to form solution B; 3.2-3.5 g of gadolinium nitrate and 1.6-1.7 g of sodium acetate were added to 20 mL of deionized water and stirred to form solution C; solution B and solution C were mixed together to form a gadolinium titanate precursor; a 1.2 mm inner diameter glass was placed in the middle of the furnace chamber of the programmable box-type electric furnace. A quartz nozzle, the tail end of the nozzle is connected to a constant flow infusion pump outside the furnace, and the high silica cloth obtained in step 2 is placed 5 cm below the nozzle; the temperature of the programmable box-type electric furnace is controlled at 700-750°C, and the flow rate of the gadolinium titanate precursor delivered by the constant flow infusion pump is controlled at 10 mL / min, and the gadolinium titanate precursor is sprayed out in a mist form and deposited on the surface of the high silica cloth, and a granular distribution coating is formed after curing; after the spraying is completed, the calcination is continued at the set temperature for 2 hours to obtain the organic gas purification cloth.

[0012] Furthermore, the high-silica cloth in step (1) is a heat-resistant, soft special crystal fiber fabric with a plane size of 10 cm×10 cm and a thickness of 0.8 mm; the high-silica cloth adopts Na2O-B2O3-SiO2 ternary system glass raw material, the SiO2 content in the high-silica cloth reaches 96%, and the thermal stability temperature is higher than 1000°C.

[0013] Furthermore, the organic gas purification cloth uses high-silica cloth as a base material, and prepares a strontium oxide-gadolinium titanate composite active coating through two steps of impregnation deposition of strontium oxide and spray deposition of gadolinium titanate; wherein the mass percentage of strontium oxide in the organic gas purification cloth is 2.6% to 2.9%; the mass percentage of gadolinium titanate in the organic gas purification cloth is 2.8% to 3.1%.

[0014] Furthermore, the organic gas purification cloth has stable performance at temperatures below 650°C.

[0015] Compared with the prior art, the method for preparing an organic gas purification cloth of the present invention has the following advantages:

[0016] The organic gas purification cloth prepared by the present invention retains the original porous structure of the high-silica cloth and can absorb organic gases in the air; the strontium oxide-gadolinium titanate composite active coating can decompose the adsorbed organic gases under light, and simultaneously release the surface of the high-silica cloth occupied by the organic gases for continuous air purification. The present invention prepares the strontium oxide-gadolinium titanate composite active coating on the acid-washed fixed-hole high-silica cloth by two steps of impregnation deposition of strontium oxide and spray deposition of gadolinium titanate. The coating is tightly combined with the high-silica cloth and is evenly distributed on the surface of the high-silica cloth. The organic gas purification cloth prepared by the present invention has good activity and stable performance, and can be used for long-term purification of organic gases in the air. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with specific examples. It should be understood that these examples are only intended to illustrate the present invention and are not intended to limit the scope of the present invention. The operating methods in the following examples where no specific conditions are indicated are usually carried out under conventional conditions or under conditions recommended by the manufacturer.

[0018] Example 1

[0019] A method for preparing an organic gas purification cloth comprises the following process steps:

[0020] Step 1: Pickling and fixing holes with high silica cloth

[0021] Add 350mL of 0.15mol / L hydrochloric acid solution into a beaker, soak the high-silica cloth in the hydrochloric acid solution, heat the solution to 50°C, and keep it warm for 60 minutes; take out the acid-washed high-silica cloth from the hydrochloric acid solution, wash it with pure water, and then dry it in a 120°C oven for 15 hours; calcine the dried high-silica cloth at 820°C for 2 hours to obtain the acid-washed fixed-hole high-silica cloth;

[0022] Step 2: Impregnation deposition of strontium oxide

[0023] Add 5.6g of strontium chloride and 1.8g of sodium bicarbonate to 200mL of pure water respectively, and stir to form solution A; immerse the acid-washed high-silica cloth with fixed holes in solution A, heat the solution to 55°C, and keep it warm for 60 minutes; take out the high-silica cloth, dry it in an oven at 120°C for 10 hours, and then calcine it at 750°C for 2 hours to obtain the high-silica cloth with deposited strontium oxide.

[0024] Step 3: Spray deposition of gadolinium titanate

[0025] Add 3.3mL of n-butyl titanate, 1.2g of emulsifier Span80, and 1.5mL of tributyl borate to 100mL of ethanol, and stir to form solution B; add 3.2g of gadolinium nitrate and 1.6g of sodium acetate to 20mL of deionized water, and stir to form solution C; mix solution B and solution C together to form a gadolinium titanate precursor; place a quartz nozzle with an inner diameter of 1.2mm in the middle of the furnace chamber of the program-controlled box-type electric furnace, and the tail end of the nozzle is connected to the constant flow infusion pump outside the furnace, and the high silica cloth obtained in step 2 is placed 5cm below the nozzle; control the temperature of the program-controlled box-type electric furnace at 700℃, and control the flow rate of the constant flow infusion pump to transport the gadolinium titanate precursor at 10mL / min. The gadolinium titanate precursor is sprayed out in a mist and deposited on the surface of the high silica cloth, and a granular distribution coating is formed after curing. After the spraying is completed, continue to calcine at the set temperature for 2h to obtain an organic gas purification cloth.

[0026] The organic gas purification cloth uses high-silica cloth as a base material, and a strontium oxide-gadolinium titanate composite active coating is coated on the surface of the high-silica cloth; wherein the mass percentage of strontium oxide in the organic gas purification cloth is 2.6%; the mass percentage of gadolinium titanate in the organic gas purification cloth is 2.8%.

[0027] Example 2

[0028] A method for preparing an organic gas purification cloth comprises the following process steps:

[0029] Step 1: Pickling and fixing holes with high silica cloth

[0030] Add 350mL of 0.16mol / L hydrochloric acid solution into a beaker, soak the high-silica cloth in the hydrochloric acid solution, heat the solution to 50°C, and keep warm for 60 minutes; take out the acid-washed high-silica cloth from the hydrochloric acid solution, wash it with pure water, and then dry it in a 120°C oven for 15 hours; calcine the dried high-silica cloth at 820°C for 2 hours to obtain the acid-washed fixed-pore high-silica cloth.

[0031] Step 2: Impregnation deposition of strontium oxide

[0032] Add 5.8g of strontium chloride and 1.9g of sodium bicarbonate to 200mL of pure water respectively, and stir to form solution A; immerse the acid-washed high-silica cloth with fixed holes in solution A, heat the solution to 55°C, and keep it warm for 60 minutes; take out the high-silica cloth, dry it in an oven at 120°C for 10 hours, and then calcine it at 750°C for 2 hours to obtain the high-silica cloth with deposited strontium oxide.

[0033] Step 3: Spray deposition of gadolinium titanate

[0034] Add 3.3mL of n-butyl titanate, 1.2g of emulsifier Span80, and 1.5mL of tributyl borate to 100mL of ethanol, and stir to form solution B; add 3.3g of gadolinium nitrate and 1.6g of sodium acetate to 20mL of deionized water, and stir to form solution C; mix solution B and solution C together to form a gadolinium titanate precursor; place a quartz nozzle with an inner diameter of 1.2mm in the middle of the furnace chamber of the program-controlled box-type electric furnace, and the tail end of the nozzle is connected to the constant flow infusion pump outside the furnace, and the high silica cloth obtained in step 2 is placed 5cm below the nozzle; control the temperature of the program-controlled box-type electric furnace at 710℃, and control the flow rate of the constant flow infusion pump to transport the gadolinium titanate precursor at 10mL / min. The gadolinium titanate precursor is sprayed out in a mist and deposited on the surface of the high silica cloth, and a granular distribution coating is formed after curing. After the spraying is completed, continue to calcine at the set temperature for 2h to obtain an organic gas purification cloth.

[0035] The organic gas purification cloth uses high-silica cloth as a base material, and a strontium oxide-gadolinium titanate composite active coating is coated on the surface of the high-silica cloth; wherein the mass percentage of strontium oxide in the organic gas purification cloth is 2.62%; the mass percentage of gadolinium titanate in the organic gas purification cloth is 2.83%.

[0036] Example 3

[0037] A method for preparing an organic gas purification cloth comprises the following process steps:

[0038] Step 1: Pickling and fixing holes with high silica cloth

[0039] Add 350mL of 0.17mol / L hydrochloric acid solution into a beaker, soak the high-silica cloth in the hydrochloric acid solution, heat the solution to 50°C, and keep it warm for 60 minutes; take out the acid-washed high-silica cloth from the hydrochloric acid solution, wash it with pure water, and then dry it in a 120°C oven for 15 hours; calcine the dried high-silica cloth at 825°C for 2 hours to obtain the acid-washed fixed-pore high-silica cloth.

[0040] Step 2: Impregnation deposition of strontium oxide

[0041] Add 6.1g of strontium chloride and 1.9g of sodium bicarbonate to 200mL of pure water respectively, and stir to form solution A; immerse the acid-washed high-silica cloth with fixed holes in solution A, heat the solution to 55°C, and keep it warm for 60 minutes; take out the high-silica cloth, dry it in an oven at 120°C for 10 hours, and then calcine it at 760°C for 2 hours to obtain the high-silica cloth with deposited strontium oxide.

[0042] Step 3: Spray deposition of gadolinium titanate

[0043] 3.4 mL of n-butyl titanate, 1.25 g of emulsifier Span80, and 1.6 mL of tributyl borate were added to 100 mL of ethanol and stirred to form solution B; 3.3 g of gadolinium nitrate and 1.65 g of sodium acetate were added to 20 mL of deionized water and stirred to form solution C; solution B and solution C were mixed together to form a gadolinium titanate precursor; a quartz nozzle with an inner diameter of 1.2 mm was placed in the middle of the furnace chamber of the programmable box-type electric furnace, the tail end of the nozzle was connected to a constant flow infusion pump outside the furnace, and the high silica cloth obtained in step 2 was placed 5 cm below the nozzle; the temperature of the programmable box-type electric furnace was controlled at 700-750° C., and the flow rate of the constant flow infusion pump for conveying the gadolinium titanate precursor was controlled at 10 mL / min, and the gadolinium titanate precursor was sprayed out in a mist form and deposited on the surface of the high silica cloth, and a granularly distributed coating was formed after curing. After spraying, continue calcining at the set temperature for 2 hours to obtain the organic gas purification cloth.

[0044] The organic gas purification cloth uses high-silica cloth as a base material, and a strontium oxide-gadolinium titanate composite active coating is coated on the surface of the high-silica cloth; wherein the mass percentage of strontium oxide in the organic gas purification cloth is 2.7%; the mass percentage of gadolinium titanate in the organic gas purification cloth is 2.9%.

[0045] Example 4

[0046] A method for preparing an organic gas purification cloth comprises the following process steps:

[0047] Step 1: Pickling and fixing holes with high silica cloth

[0048] Add 350mL of 0.18mol / L hydrochloric acid solution into a beaker, soak the high-silica cloth in the hydrochloric acid solution, heat the solution to 50°C, and keep warm for 60 minutes; take out the acid-washed high-silica cloth from the hydrochloric acid solution, wash it with pure water, and then dry it in a 120°C oven for 15 hours; calcine the dried high-silica cloth at 825°C for 2 hours to obtain the acid-washed fixed-pore high-silica cloth.

[0049] Step 2: Impregnation deposition of strontium oxide

[0050] Add 6.3g of strontium chloride and 2.0g of sodium bicarbonate to 200mL of pure water respectively, and stir to form solution A; immerse the acid-washed high-silica cloth with fixed holes in solution A, heat the solution to 55°C, and keep it warm for 60 minutes; take out the high-silica cloth, dry it in an oven at 120°C for 10 hours, and then calcine it at 760°C for 2 hours to obtain the high-silica cloth with deposited strontium oxide.

[0051] Step 3: Spray deposition of gadolinium titanate

[0052] Add 3.5mL of n-butyl titanate, 1.3g of emulsifier Span80, and 1.6mL of tributyl borate to 100mL of ethanol, and stir to form solution B; add 3.4g of gadolinium nitrate and 1.7g of sodium acetate to 20mL of deionized water, and stir to form solution C; mix solution B and solution C together to form a gadolinium titanate precursor; place a quartz nozzle with an inner diameter of 1.2mm in the middle of the furnace chamber of the program-controlled box-type electric furnace, and the tail end of the nozzle is connected to the constant flow infusion pump outside the furnace, and the high silica cloth obtained in step 2 is placed 5cm below the nozzle; control the temperature of the program-controlled box-type electric furnace at 740℃, and control the flow rate of the constant flow infusion pump to transport the gadolinium titanate precursor at 10mL / min. The gadolinium titanate precursor is sprayed out in a mist and deposited on the surface of the high silica cloth, and a granular distribution coating is formed after curing. After the spraying is completed, continue to calcine at the set temperature for 2h to obtain an organic gas purification cloth.

[0053] The organic gas purification cloth uses high-silica cloth as a base material, and a strontium oxide-gadolinium titanate composite active coating is coated on the surface of the high-silica cloth; wherein the mass percentage of strontium oxide in the organic gas purification cloth is 2.8%; the mass percentage of gadolinium titanate in the organic gas purification cloth is 3.0%.

[0054] Example 5

[0055] A method for preparing an organic gas purification cloth comprises the following process steps:

[0056] Step 1: Pickling and fixing holes with high silica cloth

[0057] Add 350mL of 0.20mol / L hydrochloric acid solution into a beaker, soak the high-silica cloth in the hydrochloric acid solution, heat the solution to 50°C, and keep it warm for 60 minutes; take out the acid-washed high-silica cloth from the hydrochloric acid solution, wash it with pure water, and then dry it in a 120°C oven for 15 hours; calcine the dried high-silica cloth at 830°C for 2 hours to obtain the acid-washed fixed-pore high-silica cloth.

[0058] Step 2: Impregnation deposition of strontium oxide

[0059] Add 6.7g of strontium chloride and 2.1g of sodium bicarbonate to 200mL of pure water respectively, and stir to form solution A; immerse the acid-washed high-silica cloth with fixed holes in solution A, heat the solution to 55°C, and keep it warm for 60 minutes; take out the high-silica cloth, dry it in an oven at 120°C for 10 hours, and then calcine it at 770°C for 2 hours to obtain the high-silica cloth with deposited strontium oxide.

[0060] Step 3: Spray deposition of gadolinium titanate

[0061] Add 3.6mL of n-butyl titanate, 1.3g of emulsifier Span80, and 1.7mL of tributyl borate to 100mL of ethanol, and stir to form solution B; add 3.5g of gadolinium nitrate and 1.7g of sodium acetate to 20mL of deionized water, and stir to form solution C; mix solution B and solution C together to form a gadolinium titanate precursor; place a quartz nozzle with an inner diameter of 1.2mm in the middle of the furnace chamber of the program-controlled box-type electric furnace, and the tail end of the nozzle is connected to the constant flow infusion pump outside the furnace, and the high silica cloth obtained in step 2 is placed 5cm below the nozzle; control the temperature of the program-controlled box-type electric furnace at 750℃, and control the flow rate of the constant flow infusion pump to transport the gadolinium titanate precursor at 10mL / min. The gadolinium titanate precursor is sprayed out in a mist and deposited on the surface of the high silica cloth, and a granular distribution coating is formed after curing. After the spraying is completed, continue to calcine at the set temperature for 2h to obtain an organic gas purification cloth.

[0062] The organic gas purification cloth uses high-silica cloth as a base material, and a strontium oxide-gadolinium titanate composite active coating is coated on the surface of the high-silica cloth; wherein the mass percentage of strontium oxide in the organic gas purification cloth is 2.9%; the mass percentage of gadolinium titanate in the organic gas purification cloth is 3.1%.

[0063] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for preparing an organic gas purification cloth, characterized in that: The process steps include: Step 1: Pickling and fixing holes with high silica cloth Add 350mL of 0.15-0.20mol / L hydrochloric acid solution into a beaker, immerse the high-silica cloth in the hydrochloric acid solution, heat the solution to 50°C, and keep it warm for 60 minutes; take out the acid-washed high-silica cloth from the hydrochloric acid solution, wash it with pure water, and then dry it in a 120°C oven for 15 hours; calcine the dried high-silica cloth at 820-830°C for 2 hours to obtain the acid-washed fixed-pore high-silica cloth; Step 2: Immersion Deposition of Strontium Oxide Add 5.6-6.7g of strontium chloride and 1.8-2.1g of sodium bicarbonate to 200mL of pure water, respectively, and stir to form solution A; immerse the acid-washed high-silica cloth with fixed holes in solution A, heat the solution to 55°C, and keep it warm for 60 minutes; take out the high-silica cloth, dry it in an oven at 120°C for 10 hours, and then calcine it at 750-770°C for 2 hours to obtain a high-silica cloth with deposited strontium oxide; Step 3: Spray deposition of gadolinium titanate 3.3-3.6 mL of n-butyl titanate, 1.2-1.3 g of emulsifier Span80, and 1.5-1.7 mL of tributyl borate were added to 100 mL of ethanol and stirred to form solution B; 3.2-3.5 g of gadolinium nitrate and 1.6-1.7 g of sodium acetate were added to 20 mL of deionized water and stirred to form solution C; solution B and solution C were mixed together to form a gadolinium titanate precursor; a 1.2 mm inner diameter glass was placed in the middle of the furnace chamber of the programmable box-type electric furnace. A quartz nozzle, the tail end of the nozzle is connected to a constant flow infusion pump outside the furnace, and the high silica cloth obtained in step 2 is placed 5 cm below the nozzle; the temperature of the programmable box-type electric furnace is controlled at 700-750°C, and the flow rate of the gadolinium titanate precursor delivered by the constant flow infusion pump is controlled at 10 mL / min, and the gadolinium titanate precursor is sprayed out in a mist form and deposited on the surface of the high silica cloth, and a granular distribution coating is formed after curing; after the spraying is completed, the calcination is continued at the set temperature for 2 hours to obtain the organic gas purification cloth.

2. A method for preparing an organic gas purification cloth according to claim 1, characterized in that: The high-silica cloth in step (1) is a heat-resistant, soft special crystal fiber fabric with a plane size of 10 cm×10 cm and a thickness of 0.8 mm; the high-silica cloth adopts Na2O-B2O3-SiO2 ternary system glass raw material, the SiO2 content in the high-silica cloth reaches 96%, and the thermal stability temperature is higher than 1000°C.

3. A method for preparing an organic gas purification cloth according to claim 1, characterized in that: The organic gas purification cloth uses high-silica cloth as a base material, and prepares a strontium oxide-gadolinium titanate composite active coating through two steps of impregnation deposition of strontium oxide and spray deposition of gadolinium titanate; wherein the mass percentage of strontium oxide in the organic gas purification cloth is 2.6% to 2.9%; the mass percentage of gadolinium titanate in the organic gas purification cloth is 2.8% to 3.1%.

4. A method for preparing an organic gas purification cloth according to claim 1, characterized in that: The organic gas purification cloth has stable performance when used at temperatures below 650°C.