Black Ta2O5, and preparation method and application thereof

A ta2o5, black technology, applied in the field of photocatalysis, can solve the problems of complex process, high production cost, toxic and harmful, etc., and achieve the effect of simple preparation process and strong absorption

Inactive Publication Date: 2020-05-12
苏州机数芯微科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent Publication No. CN 104874415B reports a nitrogen-doped hollow TaON structure, but electrospinning equipment and technology are used in the preparation, resulting in high production cost and relatively complicated process
Patent Publication No. CN104826643B reports a kind of N-doped Ta which can work under visible light 2 o 5 And CdS heterostructure, to obtain a certain visible light catalytic effect, but the material used in the preparation process of toxic and harmful metal ions Cd 2+ , which limits its large-scale application
[0005] After researching related literature reports and patents of tantalum oxide nanomaterials at home and abroad, there is no research on black Ta 2 o 5 Preparation and precedents in photocatalytic applications driven by visible light

Method used

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  • Black Ta2O5, and preparation method and application thereof
  • Black Ta2O5, and preparation method and application thereof
  • Black Ta2O5, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of black Ta 2 o 5 A preparation method comprising the steps of:

[0045] S1. Preparation of TaCl 5 Sol precursor

[0046] 3g TaCl 5 Dissolve in a glass beaker filled with 30mL of absolute ethanol, slowly add 5mL of acetylacetone stabilizer, stir magnetically for 3h to obtain TaCl 5 Sol precursor;

[0047] S2, preparation of tantalum oxide gel powder

[0048] TaCl 5 The sol precursor was aged in an oven at a temperature of 80°C. After the ethanol solvent was completely volatilized, the massive solid at the bottom of the beaker was taken out and transferred to a ball milling tank. The ball milling time was 24 hours to obtain tantalum oxide gel powder;

[0049] S3, prepared white Ta 2 o 5 powder

[0050] Put the tantalum oxide gel powder into a corundum crucible, place it in a muffle furnace, control the temperature rise rate to 10°C / min, heat it to 600°C, and keep it for 4 hours to obtain white Ta 2 o 5 powder;

[0051] S4, prepare black Ta 2 o 5 pow...

Embodiment 2

[0054] A kind of black Ta 2 o 5 A preparation method comprising the steps of:

[0055] S1. Preparation of TaCl 5 Sol precursor

[0056] 10g TaCl 5 Dissolve in a glass beaker filled with 30mL of absolute ethanol, slowly add 2mL of acetylacetone stabilizer, and stir magnetically for 6h to obtain TaCl 5 Sol precursor;

[0057] S2, preparation of tantalum oxide gel powder

[0058] TaCl 5 The sol precursor was aged in an oven at a temperature of 60°C. After the ethanol solvent was completely volatilized, the massive solid at the bottom of the beaker was taken out and transferred to a ball milling tank. The ball milling time was 48 hours to obtain tantalum oxide gel powder;

[0059] S3, prepared white Ta 2 o 5 powder

[0060] Put the tantalum oxide gel powder into a corundum crucible, place it in a muffle furnace, control the temperature rise rate at 5°C / min, heat it to 800°C, and keep it for 2 hours to obtain white Ta 2 o 5 powder;

[0061] S4, prepare black Ta 2 o 5...

Embodiment 3

[0064] A kind of black Ta 2 o 5 A preparation method comprising the steps of:

[0065] S1. Preparation of TaCl 5 Sol precursor

[0066] 6g TaCl 5 Dissolve in a glass beaker filled with 30mL of absolute ethanol, slowly add 4mL of acetylacetone stabilizer, and stir for 5h under magnetic force to obtain TaCl 5 Sol precursor;

[0067] S2, preparation of tantalum oxide gel powder

[0068] TaCl 5 The sol precursor was aged in an oven at a temperature of 70°C. After the ethanol solvent was completely volatilized, the massive solid at the bottom of the beaker was taken out and transferred to a ball milling tank. The ball milling time was 36 hours to obtain tantalum oxide gel powder;

[0069] S3, prepared white Ta 2 o 5 powder

[0070] Put the tantalum oxide gel powder into a corundum crucible, place it in a muffle furnace, control the temperature rise rate at 8°C / min, heat it to 700°C, and keep it for 3 hours to obtain white Ta 2 o 5 powder;

[0071] S4, prepare black Ta ...

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Abstract

The invention discloses a preparation method of black Ta2O5. The preparation method comprises the following steps: dissolving TaCl5 in absolute ethyl alcohol, adding an acetylacetone stabilizer, and magnetically stirring to obtain a TaCl5 sol precursor; aging the TaCl5 sol precursor in a drying oven, taking out a blocky solid at the bottom, and transferring the blocky solid into a ball milling tank, and performing ball milling to obtain tantalum oxide gel powder; feeding the tantalum oxide gel powder into a muffle furnace, heating, and performing heat preservation to obtain white Ta2O5 powder;uniformly mixing and grinding the white Ta2O5 powder and NaBH4, putting the obtained mixture into a tubular furnace, carrying out annealing treatment in a protective atmosphere, and cooling to obtainthe black Ta2O5. Low-valence Ta4<+> ions and oxygen vacancies are introduced into Ta2O5 crystal lattices to improve the visible light absorption, enhance the photo-induced electron and hole separation efficiency and realize efficient degradation of methylene blue pollutants in the water body through photocatalysis, toxic and harmful reagents are not used, the period is short, and the method is anew method capable of simply and rapidly producing the black Ta2O5 photocatalytic material on a large scale.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a kind of black Ta 2 o 5 Preparation method and application of photocatalyst. Background technique [0002] The problem of environmental pollution in the world has been paid more and more attention. The governments of various countries have put forward higher requirements and formulated stricter standards for the treatment of harmful substances, but due to various reasons, no satisfactory results have been achieved. Therefore, it is very necessary to develop new and practical environmental protection treatment technology. With the deepening of research, people found that semiconductor photocatalysis technology can be widely used in water and air purification, bacteria and virus killing, odor control, water splitting and nitrogen fixation due to its good photostability and high efficiency. In particular, heterogeneous photocatalytic oxidation has a remarkable effect on the removal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G35/00B01J23/20C02F1/30C02F101/30
CPCC01G35/00C02F1/30B01J23/20B01J35/004C02F2305/10C02F2101/308C01P2004/01C01P2004/04C01P2002/86C01P2002/84
Inventor 朱青陈晓露李磊磊杨丽
Owner 苏州机数芯微科技有限公司
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