Preparation method of anatase black nano titanium oxide powder

A technology of nano-titanium oxide and anatase, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems such as difficult to meet industrialization, narrow light absorption range, complex process, etc., and meet production requirements and use requirements, easy industrialization, and simple preparation process

Inactive Publication Date: 2015-08-19
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titanium dioxide faces great challenges in solar energy utilization, mainly due to its narrow light absorption range and low separation efficiency of electron-hole pairs.
Titanium dioxide can only absorb ~5% of the ultraviolet light in the solar spectrum, but cannot use the energy of visible light and near-infrared light; the intrinsic conductivity is only ~10 -10 S/cm, which is not conducive to the separation and transport of photogenerated electron-hole pairs
Among them, the hydrogen reduction method has the disadvantages of complex process, long time consumption, high cost, etc., and there are unsafe factors such as inflammability and explos

Method used

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  • Preparation method of anatase black nano titanium oxide powder
  • Preparation method of anatase black nano titanium oxide powder
  • Preparation method of anatase black nano titanium oxide powder

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example one:

[0028] In this embodiment, a method for preparing anatase black nano-titanium oxide powder includes the following steps:

[0029] (1)Ti 4+ Solution preparation

[0030] At room temperature, add 20g of ammonium fluorotitanate powder to 200ml of deionized water, and stir until the ammonium fluorotitanate powder is completely dissolved to form a transparent Ti 4+ Solution

[0031] (2) Preparation of raw material liquid

[0032] According to the molar ratio Ti 3+ / Ti 4+ =1, in the above Ti 4+ Add 15% TiCl to the solution 3 The solution was stirred and mixed for 10 minutes to obtain a raw material liquid;

[0033] (3) Precipitation reaction

[0034] Add 40 g of precipitant propionic acid to the above raw material liquid, stir and add 0.1 mol / L dilute ammonia until the pH of the solution system is 5, and a blue precipitate is formed;

[0035] (4) Calcination of precipitate

[0036] Filter the above-mentioned sediment and wash it repeatedly with deionized water to remove Cl a...

Example Embodiment

[0037] Embodiment two:

[0038] In this embodiment, a method for preparing anatase black nano-titanium oxide powder includes the following steps:

[0039] (1)Ti 4+ Solution preparation

[0040] At room temperature, add 20g of ammonium fluorotitanate powder to 200ml of deionized water, and stir until the ammonium fluorotitanate powder is completely dissolved to form a transparent Ti 4+ Solution

[0041] (2) Preparation of raw material liquid

[0042] According to the molar ratio Ti 3+ / Ti 4+ =2, in the above Ti 4+ Add 15% TiCl to the solution 3 The solution was stirred and mixed for 10 minutes to obtain a raw material liquid;

[0043] (3) Precipitation reaction

[0044] Add 60g of precipitant propionic acid to the above raw material liquid, stir and add 0.1 mol / L dilute ammonia to the pH of the solution system to 5, and a blue precipitate is formed;

[0045] (4) Calcination of precipitate

[0046] Filter the above-mentioned sediment and wash it repeatedly with deionized water to remove Cl ad...

Example Embodiment

[0047] Example three:

[0048] In this embodiment, a method for preparing anatase black nano-titanium oxide powder includes the following steps:

[0049] (1)Ti 4+ Solution preparation

[0050] At room temperature, add 20g of ammonium fluorotitanate powder to 200ml of deionized water, and stir until the ammonium fluorotitanate powder is completely dissolved to form a transparent Ti 4+ Solution

[0051] (2) Preparation of raw material liquid

[0052] According to the molar ratio Ti 3+ / Ti 4+ =3, in the above Ti 4+ Add 15% TiCl to the solution 3 The solution was stirred and mixed for 10 minutes to obtain a raw material liquid;

[0053] (3) Precipitation reaction

[0054] Add 90g of precipitant propionic acid to the above-mentioned raw material liquid, stir and add 0.1 mol / L dilute ammonia until the pH value of the solution system is 5, and a blue precipitate is formed;

[0055] (4) Calcination of precipitate

[0056] Filter the above-mentioned precipitate and repeatedly wash with deionized wat...

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Abstract

The invention discloses a preparation method of an anatase black nano titanium oxide powder. The preparation method comprises the steps of mixing a Ti4+ solution and a Ti3+ solution together to obtain a raw material solution, adding a precipitator to the raw material solution and reacting by stirring under the condition of a pH value within the range of 5-7 to obtain precipitate, filtering and cleaning the precipitate, and then roasting to obtain the anatase black nano titanium oxide powder. The anatase black nano titanium oxide powder product prepared by use of the method is of a pure anatase phase, and can be well controlled in the Ti3+ content. The preparation method is capable of greatly reducing the production cost; besides, the preparation method is simple and fast in process; the preparation method is applicable to batch production and prone to industrialization, and further capable of effectively meeting the production and use requirements of the black nano titanium oxide.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a preparation method of anatase black nano titanium oxide powder. Background technique [0002] As an important new energy and environmental protection material, titanium dioxide can be used in photocatalysis, solar power generation, solar heat collection and other fields. However, titanium dioxide faces great challenges in solar energy utilization, mainly due to its narrow light absorption range and low separation efficiency of electron-hole pairs. Titanium dioxide can only absorb ~5% of the ultraviolet light in the solar spectrum, but cannot use the energy of visible light and near-infrared light; the intrinsic conductivity is only ~10 -10 S / cm, which is not conducive to the separation and transport of photogenerated electron-hole pairs. These problems have seriously affected the wide application of titanium dioxide in the fields of energy and environment, so that the s...

Claims

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Application Information

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IPC IPC(8): C01G23/053C01G23/08B01J21/06
Inventor 赵学国王艳香黄丽群杨志胜郭平春
Owner JINGDEZHEN CERAMIC INSTITUTE
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