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A preparation method of magnetic nano-silver oxide/titanium dioxide composite photocatalytic material

A composite photocatalysis and titanium dioxide technology, applied in chemical instruments and methods, physical/chemical process catalysts, nanotechnology, etc., can solve the problems of easy separation, insufficient material binding, and insufficient degradation efficiency, and achieve a simple synthesis process. , the effect of improving catalytic efficiency, improving thermal stability and crystallinity

Active Publication Date: 2016-05-11
溧阳常大技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional composite method is to use a certain substance as the matrix, and then load another substance on the matrix through physical contact. The two substances are not tightly combined, easy to separate, and cannot fully exert the degradation efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Dissolve 60mL of titanium tetraisopropoxide in methanol solution to prepare a mixed solution with a mass concentration of 40%. Add 0.6g of silver nitrate, 1.4g of ferric nitrate and 0.6g of ferrous nitrate to the mixed solution, and keep stirring until dissolved ; Under stirring, dropwise add ammonia water with a mass concentration of 25% to the above solution until the pH reaches 10, and heat it to 55°C, continue stirring for 2h, then separate the precipitate and wash it with methanol for 3 times, and then dry it at 80°C; After the product obtained by drying is ground into powder, the heating rate is raised to 850° C. for 3 hours at a heating rate of 20° C. / min to obtain a magnetic nano-silver oxide / titanium dioxide composite photocatalytic material.

[0017] Add 0.5 g of the obtained magnetic nano-silver oxide / titanium dioxide composite photocatalytic material to 500 mL of acidic red wastewater with a concentration of 50 mg / L, react for 25 minutes under the irradiation...

Embodiment 2

[0019] Dissolve 40mL of titanium tetraisopropoxide in methanol solution to prepare a mixed solution with a mass concentration of 20%, add 0.3g of silver nitrate, 1.0g of ferric nitrate and 0.4g of ferrous nitrate to the mixed solution, and keep stirring until dissolved ; Under stirring, dropwise add ammonia water with a mass concentration of 20% to the above solution until the pH reaches 9, and heat to 50°C, continue stirring for 1h, then separate the precipitate and wash it twice with methanol, and then dry it at 70°C; After the product obtained by drying is ground into powder, the heating rate is raised to 600° C. for 1 hour at a heating rate of 10° C. / min to obtain a magnetic nano-silver oxide / titanium dioxide composite photocatalytic material.

[0020] Add 0.5 g of the obtained magnetic nano-silver oxide / titanium dioxide composite photocatalytic material to 500 mL of golden orange 7 wastewater with a concentration of 50 mg / L, and react for 25 minutes under the irradiation o...

Embodiment 3

[0022] Dissolve 50mL of titanium tetraisopropoxide in methanol solution to prepare a mixed solution with a mass concentration of 30%, add 0.5g of silver nitrate, 1.4g of ferric nitrate and 0.5g of ferrous nitrate to the mixed solution, and keep stirring until dissolved ; Under stirring, dropwise add ammonia water with a mass concentration of 20% to the above solution until the pH reaches 10, and heat to 55°C, continue stirring for 2h, then precipitate and separate, wash with methanol for 3 times, and then dry at 80°C; After the product obtained by drying is ground into powder, the heating rate is raised to 850° C. for 3 hours at a heating rate of 20° C. / min to obtain a magnetic nano-silver oxide / titanium dioxide composite photocatalytic material.

[0023] Add 0.5 g of the obtained magnetic nano-silver oxide / titanium dioxide composite photocatalytic material to 500 mL of Rose Bengal B wastewater with a concentration of 50 mg / L, and react for 25 minutes under the irradiation of a...

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PUM

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Abstract

The invention discloses a preparation method of magnetic nano silver phosphate / titanium dioxide composite photocatalytic material. The method comprises the following specific steps: dissolving titanium tetraisopropoxide into a methanol solution; feeding silver nitrate, ferric nitrate and ferrous nitrate into the mixed solution, and continuously mixing until the mixture is dissolved; dropwise adding ammonia water into the obtained solution while mixing until the pH value is 9-10, and heating up to 50-55 DEG C; continuously mixing for 1-2 hours, carrying out precipitation separation, washing the product with methyl alcohol for 2-3 times, and drying at the temperature of 70-80 DEG C; grinding the dried product into powder; heating up to 600-850 DEG C at the heating rate of 10-20 DEG C / min, and carrying out calcination for 1-3 hours to obtain the magnetic nano silver phosphate / titanium dioxide composite photocatalytic material. The magnetic nano silver phosphate / titanium dioxide composite photocatalytic material is simple in synthetic process; titanium and silver are doped with each other and closely combined together, so that the mutual synergistic effect can be effectively exerted.

Description

technical field [0001] The invention relates to a preparation method of a magnetic nano-silver oxide / titanium dioxide composite photocatalytic material, which belongs to the technical field of sewage treatment in environmental protection. Background technique [0002] Traditional water treatment methods have problems such as low efficiency, high cost, and secondary pollution, and sewage treatment has not been well resolved. The development and application of nanotechnology is likely to completely solve this problem. TiO was discovered in 1972 2 High oxidation activity, good chemical stability, non-toxic to the human body, low cost, no pollution, wide application range, so it is the most important, but TiO 2 The bandgap width is large (such as anatase TiO 2 The forbidden band width Eg=3.2eV), can only absorb the light in the ultraviolet region (wavelength less than 387nm), and the utilization efficiency of solar energy is low. [0003] As an important part of nanomaterial...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185B01J32/00B82Y30/00B82Y40/00H01F1/20
Inventor 马建锋邹静李良银姚超
Owner 溧阳常大技术转移中心有限公司