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Preparation method of calcium carbonate composite powder with visible light catalytic activity

A composite powder and catalytic activity technology, applied in the field of photocatalysis, can solve the problems of calcium carbonate having no catalytic performance, complex preparation process, limited application scope, etc., and achieve easy large-scale production, simple preparation process, and low experimental cost. Effect

Pending Publication Date: 2019-05-03
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, doping and semiconductor compounding are often used to obtain zinc oxide catalytic materials that respond to visible light. The preparation process is complicated and the cost is high, and most modified zinc oxides have color, which limits their application range.
In addition, calcium carbonate used in the fields of coatings, papermaking, paints, etc. does not have catalytic properties, and needs to be further improved in terms of anti-ultraviolet aging, antibacterial, etc.

Method used

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  • Preparation method of calcium carbonate composite powder with visible light catalytic activity
  • Preparation method of calcium carbonate composite powder with visible light catalytic activity
  • Preparation method of calcium carbonate composite powder with visible light catalytic activity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) 60 g of zinc acetate will be housed in the porcelain element dish, and it is put into the muffle furnace;

[0039] (2) Raise the temperature to 350 °C at a heating rate of 1 °C, and calcined at this temperature for 3 h, cooled to room temperature and ground to obtain a zinc oxide nanostructured visible photocatalytic material;

[0040] (3) Weigh 0.5 g of the zinc oxide nanostructure obtained in the above step (2), 500 g of light calcium carbonate, zirconia balls and 100 mL of deionized water into a ball mill jar, and then place it in a ball mill and mill it for 900 min ;

[0041] (4) Sieve the mixed solution obtained in the above step (3), let it settle, and wash to obtain the precipitated substance, and then blow the precipitated dry by blowing air, and finally obtain a light calcium carbonate composite powder with visible light catalytic activity.

[0042] figure 1XRD figure for the obtained light calcium carbonate composite powder. It can be concluded from the...

Embodiment 2

[0044] (1) 20 g of zinc carbonate will be housed in the porcelain element dish, and it is put into the muffle furnace;

[0045] (2) Raise the temperature to 250 °C at a heating rate of 5 °C, and calcined at this temperature for 2 h, cooled to room temperature and ground to obtain a zinc oxide nanostructured visible photocatalytic material;

[0046] (3) Weigh 5 g of zinc oxide nanostructures obtained in the above step (2), 200 g of heavy calcium carbonate and 100 g of light calcium carbonate, zirconia balls and 50 mL of deionized water into a ball mill jar, and then put them Placed in a ball mill for 300 min;

[0047] (4) Sieve the mixed solution obtained in the above step (3), let it settle, and wash to obtain the precipitated substance, and then blow the precipitated dry by blowing air, and finally obtain a mixed calcium carbonate composite powder with visible light catalytic activity.

[0048] figure 2 The SEM image and XRD pattern of the obtained zinc oxide and mixed cal...

Embodiment 3

[0050] (1) 30 g of zinc oxalate is housed in a porcelain element dish, and it is put into a muffle furnace;

[0051] (2) Raise the temperature to 350 °C at a heating rate of 3 °C, and calcined at this temperature for 3 h, cooled to room temperature and ground to obtain a zinc oxide nanostructured visible photocatalytic material;

[0052] (3) Weigh 4 g of the zinc oxide nanostructure obtained in the above step (2), 400 g of ground calcium carbonate, zirconia balls and 80 mL of deionized water into a ball mill jar, and then place it in a ball mill for ball milling for 800 min;

[0053] (4) The mixed solution obtained in the above step (3) is sieved, left to settle, and washed to obtain the precipitated substance, and then the precipitate is dried by blowing air, and finally a heavy calcium carbonate composite powder with visible light catalytic activity is obtained.

[0054] image 3 is a TEM image of the obtained ground calcium carbonate composite powder. It can be observed ...

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Abstract

The invention relates to a preparation method of calcium carbonate composite powder with visible light catalytic activity. The preparation method comprises the following steps: taking a zinc salt as araw material to carry out calcining to obtain a white nano zinc oxide visible-light catalytic material, and then mixing a calcium carbonate raw material with the zinc oxide nano material by mechanical ball milling to obtain the white calcium carbonate composite powder with catalytic activity. The preparation method has the greatest characteristic that on the basis of obtaining the white zinc oxide nano structure with the visible-light catalytic activity through a simple calcining method, the white calcium carbonate composite powder with the visible-light catalytic activity is prepared througha water-phase mechanical ball milling method. The method is simple in preparation process and low in cost and is easy for industrial production, and the obtained modified calcium carbonate has a wideapplication prospect in the fields of coatings, papermaking, paints and the like.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and relates to a preparation method of calcium carbonate composite powder with visible light catalytic activity. Background technique [0002] Zinc oxide is a common semiconductor material with low price and abundant reserves. It has anti-ultraviolet aging, excellent photoelectric characteristics and photocatalytic activity. It is widely used in solar cells, anti-ultraviolet radiation, photocatalysts and other fields. However, as a photocatalyst, pure ZnO can only absorb ultraviolet light due to its forbidden band width of 3.37 eV, and the generated photogenerated electron-hole pairs are easy to recombine, resulting in low photocatalytic activity, which limits its industrial application. In addition, the visible light catalytic activity of zinc oxide can be improved by modification, but the whiteness of zinc oxide is often reduced, thus limiting its application. [0003] Calcium carbonate is a comm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/236C02F1/30C02F1/72C02F101/30
Inventor 陈传盛罗思瑶刘天贵
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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