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Visible light responsive bismuth-containing garnet structure oxide photocatalyst BiLi2Ca2V3O12 and preparation method thereof

A photocatalyst and garnet technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as inability to utilize visible light and limit the use of photocatalysts, Achieve the effects of excellent catalytic performance, low cost and simple preparation method

Active Publication Date: 2013-03-13
SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the end of the 1970s, people have proposed the use of photocatalysts to decompose organic substances such as pesticides and odorous substances in water and the atmosphere, as well as self-cleaning of solid surfaces coated with photocatalysts; at present, the photocatalysts used are mainly titanium dioxide. Titanium dioxide is used to decompose organic substances such as pesticides and odorous substances in water and the atmosphere. However, the band gap of titanium dioxide is 3.2eV, and it can only show activity under the irradiation of ultraviolet rays shorter than 400nm. It can only be used indoors or with ultraviolet lamps. Work in places where visible light can hardly be utilized, which greatly limits the use of titanium dioxide photocatalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) 99.9% analytically pure chemical raw material Bi 2 o 3 , Li 2 CO 3 , CaCO 3 and V 2 o 3 Press BiLi 2 Ca 2 V 3 o 12 Chemical formula weighing ingredients.

[0019] (2) Mix the raw materials prepared in step (1), put them into a ball mill jar, add zirconia balls and absolute ethanol, ball mill for 2 hours, mix and grind, take out and dry, and pass through a 200-mesh sieve.

[0020] (3) Pre-fire the powder obtained in step (2) at 650°C, keep it warm for 8 hours, cool it down to room temperature naturally, and then use a ball mill to reduce the particle diameter to 2 μm, and then you can get a bismuth-containing garnet structure photocatalyst BiLi 2 Ca 2 V 3 o 12 powder.

[0021] The prepared photocatalyst can remove 99% of methyl orange in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

[0022]

Embodiment 2

[0024] (1) 99.9% analytically pure chemical raw material Bi 2 o 3 , Li 2 CO 3 , CaCO 3 and V 2 o 3 Press BiLi 2 Ca 2 V 3 o 12 Chemical formula weighing ingredients.

[0025] (2) Mix the raw materials prepared in step (1), put them into a ball mill jar, add zirconia balls and absolute ethanol, ball mill for 4 hours, mix and grind, take out and dry, and pass through a 200-mesh sieve.

[0026] (3) Pre-fire the powder obtained in step (2) at 670°C, keep it warm for 7 hours, cool it down to room temperature naturally, and then mill it with a ball mill to make the particle diameter smaller to 2 μm, and then you can get a bismuth-containing garnet structured photocatalyst BiLi 2 Ca 2 V 3 o 12 powder.

[0027] The prepared photocatalyst can remove 99.4% of methyl orange in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

[0028]

Embodiment 3

[0030] (1) 99.9% analytically pure chemical raw material Bi 2 o 3 , Li 2 CO 3 , CaCO 3 and V 2 o 3 Press BiLi 2 Ca 2 V 3 o 12 Chemical formula weighing ingredients;

[0031] (2) Mix the raw materials prepared in step (1), put them into a ball mill jar, add zirconia balls and absolute ethanol, ball mill for 8 hours, mix and grind, take out and dry, and pass through a 200-mesh sieve.

[0032] (3) Pre-burn the powder obtained in step (2) at 700°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then mill it with a ball mill to reduce the particle diameter to 2 μm, and then you can get a bismuth-containing garnet structured photocatalyst BiLi 2 Ca 2 V 3 o 12 powder.

[0033] The prepared photocatalyst can remove 99.2% of methyl orange in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

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Abstract

The invention discloses a visible light responsive bismuth-containing garnet structure oxide photocatalyst BiLi2Ca2V3O12 and a preparation method thereof. A chemical composition type of the visible light responsive bismuth-containing garnet structure oxide photocatalyst is BiLi2Ca2V3O12. The preparation method comprises the following steps of: weighing and batching 99.9% analytic pure chemical feedstock Bi2O3, Li2CO3, CaCO3 and V2O3 according to the BiLi2Ca2V3O12 formulae; (2) mixing the prepared raw material in the step (1), placing the mixture in a ball mill tank, adding a zirconia ball and absolute ethyl alcohol, performing ball milling for 2-8 hours, mixing and grinding, taking out the raw material so as to dry, and causing the raw material to pass a 200-mesh screen; and (3) preburning the fine material in the step (2) at 650-700 DEG C, carrying out heat preservation for 6-8 hours, naturally cooling to the room temperature, then decreasing the particle diameter through smash instruments such as a ball grinder so as to achieve 2 mu m, thereby obtaining bismuth-containing garnet structure light catalyzer BiLi2Ca2V3O12 powder. The preparation method provided by the invention has the advantages that the preparation method is simple, the cost is low, the preparative photocatalyst has a good catalytical property, and the photocatalyst has the decomposition harmfulness chemical substances, organic biomass and germicidal action under the visible light irradiation.

Description

technical field [0001] The invention relates to a visible light-responsive bismuth-containing garnet structure oxide photocatalyst BiLi 2 Ca 2 V 3 o 12 The invention and a preparation method thereof belong to the field of inorganic photocatalytic materials. Background technique [0002] Environmental pollution is a matter of great concern to all countries in the world. It has led to the continuous decline in the quality of people's drinking water sources and industrial water sources, resulting in increasing air pollution, causing continuous damage to the ecological environment, and posing a serious threat to human survival. In order to solve these Problem, people use various methods to control and control environmental pollution. [0003] Since the end of the 1970s, people have proposed the use of photocatalysts to decompose organic substances such as pesticides and odorous substances in water and the atmosphere, as well as self-cleaning of solid surfaces coated with pho...

Claims

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Application Information

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IPC IPC(8): B01J23/22C02F1/30
Inventor 方亮向飞苏聪学
Owner SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD