Visible-light-responded photocatalyst Ba2ZnTi5O13 and preparation method thereof

A photocatalyst and visible light technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Low conversion efficiency and other issues, to achieve the effect of low cost, excellent catalytic performance, and simple preparation method

Active Publication Date: 2013-09-25
东台城东科技创业园管理有限公司
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AI-Extracted Technical Summary

Problems solved by technology

[0005]Although photocatalytic 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 low photoconversion efficiency and poor stability. Therefore, it is necessary to research and develop new high-efficiency photocatalysts with visible light response.
It has been reported in literature [R.S. Roth, C.J. Rawn, C.G. Lindsay, J. Solid Chem. 104 (1993) 99–118.] that titanate Ba 2 ZnTi 5 o 13 The sy...
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Abstract

The invention discloses a visible-light-responded titanate photocatalyst Ba2ZnTi5O13 and a preparation method thereof. The chemical composition formula of the titanate photocatalyst is Ba2ZnTi5O13. The invention further discloses the preparation method of the photocatalyst. According to the photocatalyst and the preparation method thereof, the preparation method is simple and is low in cost, and the prepared photocatalyst has excellent catalysis performance, plays a role in decomposing harmful chemical substances under the irradiation of visible light and is good in stability, thereby having good application prospects.

Application Domain

Water/sewage treatment by irradiationMetal/metal-oxides/metal-hydroxide catalysts

Technology Topic

Chemical substanceChemical composition +6

Examples

  • Experimental program(3)

Example Embodiment

[0017] Example 1:
[0018] (1) 99.9% analytically pure chemical raw material BaCO 3 , ZnO and TiO 2 , Press Ba 2 ZnTi 5 O 13 Chemical formula weighing ingredients.
[0019] (2) Mix the raw materials prepared in step (1), put them into a ball mill tank, 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.
[0020] (3) Pre-fire the uniformly mixed powder in step (2) at 1100°C, keep it warm for 6 hours, and cool it naturally to room temperature, and then use a ball mill to pulverize the particles to reduce the particle diameter to less than 2μm to obtain titanate Ba 2 ZnTi 5 O 13 powder.
[0021] The prepared photocatalyst, under visible light with a wavelength greater than 420nm, the removal rate of methyl orange reached 97.7% in 120 minutes.

Example Embodiment

[0022] Example 2:
[0023] (1) 99.9% analytically pure chemical raw material BaCO 3 , ZnO and TiO 2 , Press Ba 2 ZnTi 5 O 13 Chemical formula weighing ingredients.
[0024] (2) Mix the raw materials prepared in step (1), put them into a ball mill tank, 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.
[0025] (3) Pre-fire the uniformly mixed powder in step (2) at 1120°C, keep it warm for 6 hours, and cool it to room temperature naturally, and then use a ball mill to pulverize the particles to reduce the particle diameter to less than 2μm to obtain titanate Ba 2 ZnTi 5 O 13 powder.
[0026] The prepared photocatalyst, under visible light with a wavelength greater than 420nm, the removal rate of methyl orange reached 98.5% in 120 minutes.

Example Embodiment

[0027] Example 3:
[0028] (1) 99.9% analytically pure chemical raw material BaCO 3 , ZnO and TiO 2 , Press Ba 2 ZnTi 5 O 13 Chemical formula weighing ingredients.
[0029] (2) Mix the raw materials prepared in step (1), put them into a ball mill tank, 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.
[0030] (3) Pre-fire the uniformly mixed powder in step (2) at 1150°C, keep it for 6 hours, and cool it to room temperature naturally, and then use a ball mill to pulverize the particles to reduce the particle diameter to less than 2μm to obtain titanate Ba 2 ZnTi 5 O 13 powder.
[0031] The prepared photocatalyst, under visible light with a wavelength greater than 420nm, the removal rate of methyl orange reached 98.7% for 120min.

PUM

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Description & Claims & Application Information

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