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Visible light response photocatalyst SrLa10V4O26 and preparation method thereof

A photocatalyst and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve poor stability, low photoconversion efficiency, and no visible light response Photocatalytic performance and other issues, to achieve the effect of low cost, simple preparation method and excellent catalytic performance

Active Publication Date: 2014-04-09
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

[0005] Although photocatalysis research has been carried out for several years, the types of photocatalysts with visible light response reported are still very limited, and there are still problems such as low photoconversion efficiency, poor stability and narrow spectral response range, so the research and development of new photocatalysts with Efficient photocatalysts responsive to visible light are highly desirable
Our recent study of SrLa 10 V 4 o 26 、BaLa 10 V 4 o 26 and CaLa 10 V 4 o 26 conducted photocatalytic performance studies and found that SrLa 10 V 4 o 26 photocatalytic performance with excellent visible light response, but BaLa 10 V 4 o 26 and CaLa 10 V 4 o 26 Photocatalytic performance without visible light response

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) 99.9% analytically pure chemical raw material SrCO 3 , La 2 o 3 and V 2 o 5 , by SrLa 10 V 4 o 26 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 8 hours, mix and grind until fine, take it out and dry it, and pass through a 200-mesh sieve.

[0020] (3) Pre-fire the uniformly mixed powder in step (2) at 850°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use ball mill pulverization to make the particle diameter smaller than 2 μm, that is, to obtain SrLa 10 V 4 o 26 powder.

[0021] The prepared photocatalyst can remove 98.8% of methyl orange in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 2

[0023] (1) 99.9% analytically pure chemical raw material SrCO 3 , La 2 o 3 and V 2 o 5 , by SrLa 10 V 4 o 26 Chemical formula weighing ingredients.

[0024] (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 until fine, take it out and dry it, and pass through a 200-mesh sieve.

[0025] (3) Pre-fire the uniformly mixed powder in step (2) at 870°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill to make the particle diameter smaller than 2 μm, that is, to obtain SrLa 10 V 4 o 26 powder.

[0026] The prepared photocatalyst, under the irradiation of visible light with a wavelength greater than 420nm, can remove 99.1% of methyl orange within 120 minutes.

Embodiment 3

[0028] (1) 99.9% analytically pure chemical raw material SrCO 3 , La 2 o 3 and V 2 o 5 , by SrLa 10 V 4 o 26 Chemical formula weighing ingredients.

[0029] (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 until fine, take it out and dry it, and pass through a 200-mesh sieve.

[0030] (3) Pre-fire the uniformly mixed powder in step (2) at 880°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill to reduce the particle diameter to less than 2 μm to obtain SrLa 10 V 4 o 26 powder.

[0031] The prepared photocatalyst can remove 98.3% 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 response photocatalyst SrLa10V4O26 and a preparation method thereof. The chemical composition formula of the photocatalyst is SrLa10V4O26. The preparation method is as follows: (1) weighing 99.9% analytical pure chemical raw material SrCO3, La2O3 and V2O5 for dosing according to the chemical formula SrLa10V4O26; (2) mixing the dosed raw materials of the step (1) to put into a ball milling jar, adding zirconia balls and anhydrous ethanol for 8 hours of ball mill, mixing and finely milling, taking out and drying, sieving with a 200 mesh sieve; and (3) presintering the evenly-mixed powder at 850-880 DEG C, keeping warm for 6 hours, naturally cooling to room temperature, and diminishing the particle diameter by ball mill grinding to less than 2 microns to obtain the SrLa10V4O26 powder. The preparation method is simple and low in cost, and the prepared photocatalyst has good catalytic performances, can decompose hazardous chemicals under visible light irradiation, is good in stability, and has good application prospects.

Description

technical field [0001] The invention relates to a photocatalyst SrLa responsive to visible light 10 V 4 o 26 The invention and a preparation method thereof belong to the field of inorganic photocatalytic materials. Background technique [0002] With the development of society and economy, people pay more and more attention to energy and ecological environment. Solving the problems of energy shortage and environmental pollution is an urgent need to achieve sustainable development, improve people's quality of life and ensure national security. [0003] Since the late 1970s, people have proposed the use of photocatalysts to decompose organic substances such as pesticides and odorous substances in water and the atmosphere, and self-cleaning of solid surfaces coated with photocatalysts. The principle of photocatalytic reaction is that after the photocatalyst absorbs photons higher than its bandgap energy, holes and electrons are generated, and these holes and electrons undergo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22A62D3/17A62D101/26
Inventor 方亮李洁巩美露
Owner SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD
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