Preparation method of supported photocatalyst Bi2WO6-TiO2/foam metal

A technology of bi2wo6-tio2 and metal foam, which is applied in the field of water pollution treatment, can solve the problems of high desorption rate of photocatalyst powder and insufficient utilization of light energy, and achieve good photocatalytic activity, good visible light absorption and high efficiency. Effect

Inactive Publication Date: 2015-03-04
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a spray-coating bonding method to prepare loaded Bi 2 WO 6 -TiO 2 Photocatalyst, effectively avoiding the phenomenon of catalyst powder falling off, and realizing the purpose of degrading organic dyes under visible light, effectively improving the efficiency of wastewater treatment

Method used

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  • Preparation method of supported photocatalyst Bi2WO6-TiO2/foam metal
  • Preparation method of supported photocatalyst Bi2WO6-TiO2/foam metal

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Bi(NO 3 ) 3 ·5H 2 O and ethylene glycol were mixed and stirred for 1h as a Bi source, and then absolute ethanol was added as a mixed solvent. According to the molar ratio of Bi and Ti atoms being 3:1, a certain amount of TiO 2 Powder, mixed well, hydrothermal reaction at 180°C for 15 hours, washed and dried; then take a certain amount of Bi 2 WO 6 -TiO 2 precursor, and dispersed in anhydrous ethanol solution, fully stirred evenly. Take a certain quality of foamed nickel carrier, soak and wash it with acetone, dilute hydrochloric acid and deionized water to remove oil and oxides on the surface, then spray a layer of silica sol with a solid content of 25% on the surface, and dry it horizontally for 20 minutes , will Bi 2 WO 6 -TiO 2 The precursor dispersion was evenly sprayed onto the nickel foam carrier coated with silica sol coating, and after being dried horizontally for 20 min, it was calcined at 400 °C for 2 h to obtain supported Bi with visible light activit...

Embodiment 2

[0029] Bi(NO 3 ) 3 ·5H 2 O and ethylene glycol were mixed and stirred for 1h as a Bi source, and then absolute ethanol was added as a mixed solvent. According to the molar ratio of Bi and Ti atoms being 3:1, a certain amount of TiO 2 Powder, mixed well, hydrothermal reaction at 180°C for 15 hours, washed and dried; then take a certain amount of Bi 2 WO 6 -TiO 2 precursor, and dispersed in anhydrous ethanol solution, fully stirred evenly. Take a certain quality of foamed copper carrier, soak and wash it with acetone, dilute hydrochloric acid and deionized water to remove oil and oxides on the surface, then spray a layer of silica sol with a solid content of 25% on the surface, and dry it horizontally for 20 minutes , will Bi 2 WO 6 -TiO 2 The precursor dispersion was evenly sprayed onto the copper foam carrier coated with silica sol, and after being dried horizontally for 20 min, it was calcined at 400 °C for 2 h to obtain supported Bi with visible light activity. 2 WO...

Embodiment 3

[0031] Bi(NO 3 ) 3 ·5H 2 O and ethylene glycol were mixed and stirred for 1h as a Bi source, then absolute ethanol was added as a mixed solvent, and a certain amount of TiO was added according to the molar ratio of Bi and Ti atoms being 2:1. 2 Powder, mixed well, hydrothermal reaction at 180°C for 15 hours, washed and dried; then take a certain amount of Bi 2 WO 6 -TiO 2 precursor, and dispersed in anhydrous ethanol solution, fully stirred evenly. Take a certain quality of foamed copper carrier, soak and wash it with acetone, dilute hydrochloric acid and deionized water to remove the oil stains and oxides on the surface, then spray two layers of silica sol with a solid content of 25% on the surface, and dry it horizontally for 20 minutes , will Bi 2 WO 6 -TiO 2 The precursor dispersion was evenly sprayed onto the copper foam carrier coated with silica sol, and after being dried horizontally for 20 min, it was calcined at 400 °C for 2 h to obtain supported Bi with visib...

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Abstract

The invention relates to a preparation method of supported photocatalyst Bi2WO6-TiO2 / foam metal. Bi(NO3)3.5H2O and Na2WO4.2H2O are used as a Bi source and a W source, ethylene glycol and absolute ethyl alcohol are used as a mixed solvent, TiO2 powder is added and mixed uniformly, the mixture reacts for 15h at 180 DEG C and then is washed and dried; Bi2WO6-TiO2 precursors are dispersed in an absolute ethyl alcohol solution, a foam metal carrier is soaked and washed with acetone, diluted hydrochloric acid and deionized water, then a silica gel layer with the solid content of 25% is coated on the surface of the foam metal carrier and is dried in the air for 20min in a leveling manner for standby use; dispersion liquid is uniformly sprayed to the foam metal carrier coated with the silica gel, and the foam metal carrier is dried in the air for 20min in a leveling manner and is roasted for 2h at 400 DEG C to obtain the supported photocatalyst Bi2WO6-TiO2 / foam metal. The preparation process is simple, can be amplified easily, and is suitable for large-scale practical application.

Description

technical field [0001] The invention relates to a loaded photocatalyst Bi 2 WO 6 -TiO 2 / The preparation method of metal foam is used in the field of water pollution treatment. Background technique [0002] The dye industry is a large resource consumer and plays an important role in our daily life, but it is also a major polluter. Organic dye wastewater is recognized as one of the main sources of industrial pollution in the world. The treatment of biodegradable organic pollutants has become a serious environmental problem. The annual output of dyestuffs in my country is about 800,000 tons, accounting for more than 65% of the world's total output. However, about 10%-20% of dyestuffs are discharged into rivers, lakes, seas and ground water as wastewater during the printing and dyeing process, which is harmful to the ecological environment and Drinking water poses a great hazard. In order to deal with the problem of environmental pollution, it is an urgent problem to be so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/31B01J35/10
Inventor 何丹农童琴董亚梅严鹏万晓佳
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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