A method for preparing ultra-fine neodymium titanate powder by high temperature gas phase oxidation

A technology of high-temperature gas and titanic acid, applied in chemical instruments and methods, titanate, inorganic chemistry, etc., can solve problems affecting activity and use characteristics, difficult production, etc., and achieve novel preparation process, uniform particle size distribution, and high activity high effect

Inactive Publication Date: 2017-11-14
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanate often needs high-temperature heat treatment during the preparation process, and there are many large particles lacking pore structure in the product, which seriously affects its activity and use characteristics
Ultra-fine powder has extremely high surface area and surface reactivity, which is suitable for flow dynamic purification treatment mode, but it is difficult to produce ultra-fine titanate powder in the high-temperature calcination preparation process widely used at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing superfine neodymium titanate powder by high-temperature vapor phase oxidation, comprising the following process steps:

[0023] 1. Prepare a solution containing neodymium nitrate.

[0024] A 200 mL glass beaker containing 80 mL of distilled water was placed in a magnetically stirred constant temperature water bath, and the temperature of the water bath was 55 °C. While maintaining stirring, add 6.3 g of neodymium nitrate, 3.1 g of dodecyltriethylammonium chloride, 2.5 g of sodium bicarbonate and 1.8 g of sodium dihydrogen phosphate to distilled water, and stir well until all substances are completely dissolved.

[0025] Add 0.1g of anhydrous citric acid and set aside.

[0026] Prepare solutions containing titanium alkoxides.

[0027] Add 65 mL of ethylene glycol, 180 mL of absolute ethanol and 25 mL of n-butanol into a 500 mL three-necked round-bottomed flask, and install an electric stirrer, a thermocouple and a spherical condenser on the 500 m...

Embodiment 2

[0036] A method for preparing superfine neodymium titanate powder by high-temperature vapor phase oxidation, comprising the following process steps:

[0037] 1. Prepare a solution containing neodymium nitrate.

[0038] A 200 mL glass beaker containing 85 mL of distilled water was placed in a magnetic stirring constant temperature water bath, and the temperature of the water bath was 55 °C. While maintaining stirring, add 6.6 g of neodymium nitrate, 3.2 g of dodecyltriethylammonium chloride, 2.6 g of sodium bicarbonate and 1.8 g of sodium dihydrogen phosphate to distilled water, and stir well until all substances are completely dissolved.

[0039] Add 0.2g of anhydrous citric acid and set aside.

[0040] Prepare solutions containing titanium alkoxides.

[0041] Add 68 mL of ethylene glycol, 190 mL of absolute ethanol and 26 mL of n-butanol into a 500 mL three-necked round-bottomed flask, and install an electric stirrer, temperature measuring thermocouple and spherical condens...

Embodiment 3

[0050] A method for preparing superfine neodymium titanate powder by high-temperature vapor phase oxidation, comprising the following process steps:

[0051] 1. Prepare a solution containing neodymium nitrate.

[0052] A 200 mL glass beaker filled with 90 mL of distilled water was placed in a magnetic stirring constant temperature water bath, and the temperature of the water bath was 55 °C. While maintaining stirring, add 7.1 g of neodymium nitrate, 3.3 g of dodecyltriethylammonium chloride, 2.7 g of sodium bicarbonate and 1.9 g of sodium dihydrogen phosphate to distilled water, and stir well until all substances are completely dissolved.

[0053] Add 0.3g of anhydrous citric acid and set aside.

[0054] Prepare solutions containing titanium alkoxides.

[0055] Add 70 mL of ethylene glycol, 210 mL of absolute ethanol and 28 mL of n-butanol into a 500 mL three-necked round-bottomed flask, and install an electric stirrer, temperature measuring thermocouple and spherical conden...

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Abstract

The invention relates to a method for preparing superfine neodymium titanate powder by virtue of high-temperature gas phase oxidation. The method comprises the following steps: preparing a solution containing neodymium nitrate from distilled water, neodymium nitrate, dodecyl triethyl ammonium chloride, sodium hydrogen carbonate and sodium dihydrogen phosphate; preparing a solution containing titanium alkoxide from glycol, absolute ethyl alcohol, n-butyl alcohol, isopropyl alcohol titanate, a surfactant TW-8 and a stabilizer TO-102; mixing the two solutions so as to synthesize a precursor solution; and spraying the precursor solution into a temperature control tank type electric furnace, maintaining the temperature of the electric furnace at 800-900 DEG C for 120 minutes, and cooling to the room temperature, so as to obtain the superfine neodymium titanate powder. The superfine neodymium titanate powder is applied to the photocatalysis purification process of environmental pollutants and has the advantages of being high in activity, good in stability, repeatedly recyclable, and the like.

Description

Technical field: [0001] The invention relates to a functional material that can be used in the environment purification process, which is a method for preparing superfine neodymium titanate powder by high temperature gas phase oxidation. Background technique: [0002] The application of photocatalytic purification technology in the environment has gone through half a century of theoretical research, and has been gradually applied to many specific environmental pollution control processes. In countries with advanced technology such as Japan, relevant applications and products have been carried out. In-depth development. my country's research in the field of photocatalysis is at the forefront of the world, and many scholars are committed to the further industrial application of this technology. Photocatalytic technology and related products are mainly used in small civilian products and small-scale industrial production, and the main restrictive factor for its application in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/00B01J23/10B82Y30/00
CPCB01J23/10B01J35/004B01J35/023C01G23/003C01P2004/64
Inventor 张文杰刘宇轩杨焦董英昊
Owner SHENYANG LIGONG UNIV
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