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Preparation method for high-efficient photocatalyst-nanometer titanium dioxide water-based colloid

A nano-titanium dioxide, photocatalyst technology, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of environmental pollution and high raw material cost, and achieve good particle uniformity, raw material cost reduction, and formaldehyde removal. high rate effect

Active Publication Date: 2014-10-15
江苏恒智纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in many patented technologies for the preparation of nano-titanium dioxide hydrocolloids, most of them use organic titanium as the main raw material (such as titanate or titanium alkoxide, alkoxy titanium, etc.), and organic solvents (such as titanium alkoxide, etc.) need to be added during the synthesis process. Ethanol, propanol, isopropanol, etc.), hydrolysis inhibitors (such as diethanolamine, triethanolamine, etc.), chelating agents (such as ethylenediamine, acetylacetone, etc.), not only high raw material costs, but also cause environmental pollution

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  • Preparation method for high-efficient photocatalyst-nanometer titanium dioxide water-based colloid
  • Preparation method for high-efficient photocatalyst-nanometer titanium dioxide water-based colloid
  • Preparation method for high-efficient photocatalyst-nanometer titanium dioxide water-based colloid

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Embodiment 1

[0030] Embodiment 1: a kind of preparation method of efficient photocatalyst-nano titanium dioxide hydrocolloid, comprises the following steps:

[0031] Step 1. Put 5 grams of metal titanium into a 500 ml glass beaker, add 85 ml of hydrogen peroxide aqueous solution, the molar ratio of metal titanium to hydrogen peroxide is 1:8, and the metal titanium is granular sponge titanium;

[0032] Step 2, place the glass beaker in an ice-water bath, the temperature of the ice-water bath is controlled at about 10°C, and stir the mixture at a medium speed to form an intermediate reactant;

[0033] Step 3: Pour 75ml of ammonia water into a 500ml flask with a branch pipe and a piston, place the flask in a temperature-controlled hot water bath at about 60°C, heat to form ammonia vapor, and the ammonia vapor enters the intermediate reaction of medium-speed stirring through the branch pipe In the material, when the pH value of the intermediate reactant reaches about 9, close the piston on the...

Embodiment 2

[0045] Embodiment 2: a kind of preparation method of efficient photocatalyst-nano titanium dioxide hydrocolloid, comprises the following steps:

[0046] Step 1. Put 5 grams of metallic titanium into a glass beaker, add 107 mL of hydrogen peroxide aqueous solution to form a mixed solution, the molar ratio of metallic titanium to hydrogen peroxide is 1:10, and the metallic titanium is granular sponge titanium;

[0047] Step 2, place the glass beaker in an ice-water bath, the temperature of the ice-water bath is controlled between 12°C, and stir the mixed liquid at a medium speed to form an intermediate reactant;

[0048] Step 3: Pour 91mL of ammonia water into a flask with a branch pipe and a piston, place the flask in a hot water bath, control the temperature of the water bath at about 60°C, and heat to volatilize the ammonia to form ammonia vapor, which enters the intermediate reaction through the branch pipe In the product, adjust the pH value of the intermediate reactant to ...

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Abstract

The invention discloses a preparation method for a high-efficient photocatalyst-nanometer titanium dioxide water-based colloid. The preparation method comprises the following steps: adopting metal titanium as titanium source; adopting hydrogen peroxide to oxidize nulvalent metal Ti into quadrivalent TiO<2+>; further conducting complexing on the TiO<2+> and the hydrogen peroxide to obtain water-soluble TiO[H2O2]<2+> yellow complex; obtaining yellow complex colloid after evaporating and removing excess hydrogen peroxide and ammonia; conducting hydrothermal reaction by high pressure water of 150-200 DEG C; transporting the TiO[H2O2]<2+> yellow complex into pure white Ti(OH)4 water-based emulsion; adding mineral acid to adjust the pH value of the emulsion to the range of 2-4; conducting temperature control to enable the temperature of water bath to be 60-80 DEG C; continually stirring for 3-6 hours to enable the Ti(OH)4 water-based emulsion to gradually gel into nanometer titanium dioxide water-based colloid. The preparation method uses no organic solvent; no waste water or waste gas generates in the reaction process; particle diameters of colloid granular are less than 10 nanometers; degree of crystallinity is high; high photocatalytic activity is provided; coating property and film forming property on porous base material are extremely good.

Description

technical field [0001] The invention relates to a preparation method of a high-efficiency photocatalyst, which belongs to the application field of nano-titanium dioxide photocatalytic treatment of environmental pollution. Background technique [0002] The application of titanium dioxide photocatalytic technology to the control of environmental pollution, especially to completely decompose various toxic and harmful organic pollutants, has become one of the most effective means recognized by countries all over the world. [0003] The 863 national major scientific and technological special industrialization tender pointed out that the sign of the practical application of photocatalytic technology is "two highs and one low", that is, to solve the technically difficult problems in the development of high-efficiency photocatalysts and high-efficiency photocatalytic reactors, and economically to Meet the requirements of low-cost operation. [0004] Nanotechnology is the technology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B01J21/06
Inventor 程黎放童惠君童晶
Owner 江苏恒智纳米科技有限公司
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