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Photocatalytic ceramic, preparation method thereof and method for degrading organic dye RhB

A technology of photocatalytic ceramics and organic dyes, applied in the direction of ceramic products, chemical instruments and methods, heterogeneous catalyst chemical elements, etc., can solve the problems of less functional research on waste ceramics and no photocatalytic ceramics, and achieve raw materials The effect of cost reduction

Active Publication Date: 2021-03-19
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the functional studies of waste ceramics are less
At present, there is no photocatalytic ceramic prepared from titanium slag

Method used

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  • Photocatalytic ceramic, preparation method thereof and method for degrading organic dye RhB
  • Photocatalytic ceramic, preparation method thereof and method for degrading organic dye RhB
  • Photocatalytic ceramic, preparation method thereof and method for degrading organic dye RhB

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0043] Dry and dehydrate the titanium slag, and then grind it to 325 mesh to obtain green body powder; add polyvinyl alcohol solution with a concentration of 5% to the green body powder and control the mass-volume ratio of the two to 15:1kg / L, Mix the powder and the solution to granulate, and take the granulated particles on the 40 mesh sieve under the 20 mesh sieve as the green body pellets; spread the green body pellets evenly in the mold, at 380kgf / cm 2 Press molding under a certain pressure to obtain a photocatalytic ceramic green body; put the green body into a kiln and heat it to 250°C at a heating rate of 2°C / min; then heat it to 1150°C at a heating rate of 5°C / min for sintering. And keep it at the sintering temperature for 60 minutes, cool to room temperature after the heat preservation is over, and obtain a series of photocatalytic ceramics after polishing.

[0044] The main crystal phase of the prepared ceramic products is calcium magnesium feldspar phase, and the se...

example 2

[0046] Dry and dehydrate the titanium slag, and then grind it to 325 mesh to obtain green body powder; add polyvinyl alcohol solution with a concentration of 5% to the green body powder and control the mass-volume ratio of the two to 10:1kg / L, Mix the powder and the solution to granulate, and take the granulated particles on the 40 mesh sieve under the 20 mesh sieve as the green body pellets; spread the green body pellets evenly in the mold, at 345kgf / cm 2 Press molding under a certain pressure to obtain a photocatalytic ceramic green body; put the green body into a kiln and heat it to 250°C at a heating rate of 2°C / min to remove moisture from the green body; The heating rate of min was heated to 1180°C for sintering, and kept at the firing temperature for 60 minutes. After the heat preservation was completed, it was cooled to room temperature, and a series of photocatalytic ceramics were obtained after polishing.

[0047] Such as figure 1 As shown, the main crystal phase of ...

example 3

[0050] Dry and dehydrate the titanium slag, and then grind it to 200 mesh to obtain green body powder; add polyvinyl alcohol solution with a concentration of 8% to the green body powder, mix the powder and the solution to granulate, and mix the mass and volume of the two The ratio is controlled to be 20:1kg / L, and the mass-to-volume ratio of the two is controlled to be 10:1kg / L; 2 Press molding under a certain pressure to obtain a photocatalytic ceramic green body; put the green body into a kiln and heat it to 200°C at a heating rate of 3°C / min; then heat it to 1200°C at a heating rate of 15°C / min for sintering. And keep it at the sintering temperature for 15 minutes, cool to room temperature after the heat preservation is over, and obtain a series of photocatalytic ceramics after polishing.

[0051] The main crystal phase of the prepared ceramic product is calcium magnesium mellow feldspar phase, and the secondary crystal phase is iron-containing diopside phase, perovskite ph...

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Abstract

The invention provides a photocatalytic ceramic, a preparation method thereof and a method for degrading organic dye RhB. The method for preparing the photocatalytic ceramic from titanium extraction slag comprises the following steps of: grinding the titanium extraction slag into green body powder with a particle size of 200-325 meshes; mixing the green body powder with a polyvinyl alcohol solution with a concentration of 5-8% in a mass volume ratio of 10-20:1kg / L for granulating to obtain green body granules with a particle size of 20-40 meshes; pressing and molding the green body granules under a pressure of 250-380kgf / cm<2> to obtain a green body; and preheating the green body to remove water in the green body, heating the green body to 1150-1200DEG C at a heating rate of 5-15DEG C / min,keeping the temperature for 15-60min, cooling, and conducting cooling and polishing to obtain the photocatalytic ceramic. The invention has the beneficial effects that: the new photocatalytic ceramicand the preparation method thereof are provided, the raw material cost is reduced, and the organic dye can be degraded for a long time in an acidic environment.

Description

technical field [0001] The invention relates to the field of resource utilization of titanium slag and solid waste and inorganic non-metallic functional materials, in particular to a photocatalytic ceramic, a preparation method thereof and a method for degrading organic dye RhB (rhodamine B). Background technique [0002] The preparation of ceramics from industrial waste slag has been proved to be one of the important means to effectively deal with waste slag. Due to the complex composition of industrial waste slag, during the heat treatment process, volatile components (such as carbonate, Cl, etc.) in the waste slag will escape in the form of gas, and heavy metal ions (such as Cr 6+ 、Co 3+ etc.) will be solidified by the lattice, some metal oxides (such as TiO 2 , Fe 2 o 3 etc.) will act as a crystal nucleating agent and help the growth of microcrystalline particles in ceramics. Titanium extraction slag is the secondary industrial waste obtained after the titanium-cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/195C04B35/622C04B38/00B01J23/78C02F1/30C02F1/32C02F101/38C02F101/34
CPCC04B35/195C04B35/62204C04B38/00B01J23/78B01J23/002C02F1/30C02F1/32C02F2101/34C02F2101/38C02F2101/308C02F2305/10B01J2523/00C04B2235/3236C04B2235/3208C04B2235/3206C04B2235/3222C04B2235/3445C04B2235/3454C04B2235/6562C04B2235/6567C04B2235/786C04B2235/77C04B2235/96C04B2235/9692B01J35/39B01J2523/22B01J2523/23B01J2523/31B01J2523/41B01J2523/47B01J2523/842C04B38/0074C04B38/0067
Inventor 孙红娟尤皓彭同江
Owner SOUTHWEAT UNIV OF SCI & TECH
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