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Preparation method for nanometer titanium dioxide/coal ash composite material

A technology of nano-titanium dioxide and composite materials, which is applied in the field of preparation of nano-titanium dioxide/fly ash composite materials, can solve environmental pollution and other problems, and achieve great application potential and good adsorption effect

Inactive Publication Date: 2017-06-20
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is just to provide a kind of preparation method of nano-titanium dioxide / fly ash composite material for the environmental pollution problem that exists in the above-mentioned reality

Method used

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  • Preparation method for nanometer titanium dioxide/coal ash composite material
  • Preparation method for nanometer titanium dioxide/coal ash composite material
  • Preparation method for nanometer titanium dioxide/coal ash composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) The raw material fly ash is heat-treated at a roasting temperature of 500°C. After cooling, take water and the roasted fly ash powder according to the liquid-solid ratio of 2.5L: 1Kg, stir and mix well, and then add concentrated sulfuric acid to adjust the pH value to 2.5, under the condition that the temperature of the water bath is kept at 100°C, fully stir the reaction for 4.5 hours, then add water according to the liquid-solid ratio of water to the above-mentioned roasted fly ash powder of 15L: 1Kg to dilute, react for 1 hour and filter the material, Dried to obtain refined fly ash.

[0030] (2) Under the condition of ice-water bath, take distilled water and refined fly ash according to the liquid-solid ratio of 3L: 1Kg, stir and add concentrated hydrochloric acid with 15% of the mass of refined fly ash at the same time, and then drop in the concentration of 28% of the mass of refined fly ash to be 2.9 mol / L TiCl4 solution; after the tablet was allowed to stand ...

Embodiment 2

[0034] (1) The raw material fly ash is heat-treated at a roasting temperature of 500°C. After cooling, take water and the roasted fly ash powder according to the liquid-solid ratio of 3L: 1.2Kg, stir and mix well, add concentrated sulfuric acid to adjust the pH When the value reaches 2, keep the water bath temperature at 100°C, fully stir the reaction for 4 hours, then add water to dilute according to the liquid-solid ratio of water to the above-mentioned roasted fly ash powder: 16L: 1.1Kg, and filter the material after reacting for 1 hour , drying to obtain refined fly ash.

[0035] (2) Under the condition of ice-water bath, take distilled water and refined fly ash according to the liquid-solid ratio of 3.2L:1.1Kg, stir and add concentrated hydrochloric acid with 15% of the mass of refined fly ash at the same time, and then drop in 30% of the mass of refined fly ash TiCl4 solution with a concentration of 3.0 mol / L; after standing the tablet for 13 minutes, add the aqueous sol...

Embodiment 3

[0039] (1) The raw material fly ash is heat-treated at a roasting temperature of 500°C. After cooling, take water and the roasted fly ash powder according to the liquid-solid ratio of 2L: 0.8Kg, stir and mix well, and then add concentrated sulfuric acid to adjust the pH When the value reaches 3, keep the water bath temperature at 100°C, fully stir the reaction for 4.5 hours, then add water according to the liquid-solid ratio of water to the above-mentioned roasted fly ash powder: 14L: 0.8Kg to dilute, and filter the material after reacting for 1 hour , drying to obtain refined fly ash.

[0040] (2) Under the condition of ice-water bath, take distilled water and refined fly ash according to the liquid-solid ratio of 2.5L: 0.8Kg, stir and add concentrated hydrochloric acid with 10% refined fly ash mass at the same time, and then drop in 25% refined fly ash mass TiCl4 solution with a concentration of 2.9 mol / L; after standing the tablet for 10 minutes, add the aqueous solution of...

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Abstract

The invention discloses a preparation method for a nanometer titanium dioxide / coal ash composite material. The method comprises the following steps: purifying by performing thermal treatment and acid treatment on raw material coal ash, thereby acquiring refined coal ash; under a water bath condition, weighting a certain amount of refined coal ash and distilled water and putting into a four-opening flask and stirring, adding less concentrated hydrochloric acid and then dropping a certain amount of TiCl4 solution; standing by for a while, and then dropping an aqueous solution containing ammonium sulfate and concentrated hydrochloric acid into the TiCl4 solution, mixing and stirring for a period of time, increasing the temperature of the mixture and then keeping the temperature; dropping an ammonium carbonate solution in a certain concentration, adjusting pH value, reacting for a period of time and then filtering, washing and drying, and then placing a sample into a muffle furnace for roasting, thereby acquiring the coal ash loaded TiO2 composite material. According to the invention, the waste coal ash of the power plant is used as a raw material and TiO2 is loaded onto the surface of the waste coal ash, so that a photo-catalysis compound material is prepared. The material is capable of effectively degrading the waste gas and waste water and can achieve the effect of treating the waste with the waste.

Description

technical field [0001] The invention belongs to the technical field of synthesis of nanometer photocatalytic materials, and in particular relates to a preparation method of nanometer titanium dioxide / fly ash composite material. Background technique [0002] Fly ash is a kind of industrial waste, which is a fine-grained powder collected from the exhaust gas of pulverized coal furnaces in coal-fired power plants. With the deepening of automation and modernization in social life and social production, and the rapid development of the power industry, the annual discharge of fly ash has increased sharply. Fly ash is not only a waste pollutant, but also occupies land and pollutes the atmospheric environment. At the same time, fly ash is a valuable resource that can be comprehensively utilized. According to the long-term development plan of the coal and electric power industries, it is estimated that by 2020, under the premise of improving the quality of coal, the output and disc...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J21/06B01J20/30B01J23/78C02F1/28C02F1/32B01D53/86B01D53/72
CPCB01D53/8668B01J20/06B01J20/08B01J20/103C02F1/281C02F1/32B01J21/063B01J23/78B01D2255/20738B01D2255/2092B01D2255/30B01D2255/20707C02F2305/10C02F2101/345C02F2101/308B01J35/39Y02W10/37
Inventor 陈俊涛王炫李红军朱晓波张乾李望张白梅张玉德唐庆杰
Owner HENAN POLYTECHNIC UNIV
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