Preparation method for nanometer black titanium dioxide photocatalyst

A black titanium dioxide, photocatalyst technology, applied in the field of photocatalytic materials, can solve the problem of not being able to fully utilize sunlight energy and other problems

Inactive Publication Date: 2016-11-09
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional titanium dioxide photocatalytic material is a white powder, which can only absorb ultraviolet light and be excited to generate photogenerated charges, and then play the role of photocatalytic oxidation or photoelectric conversion, and cannot fully utilize most of the energy in sunlight.

Method used

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  • Preparation method for nanometer black titanium dioxide photocatalyst
  • Preparation method for nanometer black titanium dioxide photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] a. Add 2g of titanium trichloride and 0.1g of sodium borohydride into 20mL of deionized water, and keep stirring for 1 hour to obtain a purple transparent solution;

[0019] b. Add 0.2mol / L sodium hydroxide solution to the solution obtained in step a until the pH value is 2, and continue stirring for 2 hours to obtain a black titanium dioxide solution;

[0020] c. Transfer the solution in step b to a 100mL hydrothermal kettle, and react at a temperature of 80° C. for 4 hours to obtain nanometer black titanium dioxide;

[0021] d. Wash the nano-black titanium dioxide obtained in step c through 50 mL of deionized water and 50 mL of ethanol respectively until the pH is 7, and dry to obtain the final nano-black titanium dioxide photocatalyst.

Embodiment 2

[0023] a. Add 5g of titanium trichloride and 0.7g of ascorbic acid into 50mL of deionized water, and keep stirring for 2 hours to obtain a purple transparent solution;

[0024] b. Add 1.0 mol / L sodium hydroxide solution to the solution obtained in step a until the pH value is 5, and continue stirring for 2 hours to obtain a black titanium dioxide solution;

[0025] c. Transfer the solution in step b to a 100mL hydrothermal kettle, and react at a temperature of 180°C for 12 hours to obtain nanometer black titanium dioxide;

[0026] d. Wash the nano-black titanium dioxide obtained in step c with 50 mL of deionized water and 50 mL of ethanol respectively until the pH is 7, and dry to obtain the final nano-black titanium dioxide photocatalyst.

Embodiment 3

[0028] a. Add 8g TiOCl and 0.8g hydrazine hydrate into 70mL deionized water, and keep stirring for 3 hours to obtain a purple transparent solution;

[0029] b. Add 1.2mol / L sodium hydroxide solution to the solution obtained in step a until the pH value is 8, and continue stirring for 3 hours to obtain a black titanium dioxide solution;

[0030] c. Transfer the solution in step b to a 100mL hydrothermal kettle, and react at a temperature of 200°C for 18 hours to obtain nanometer black titanium dioxide;

[0031] d. Wash the nano-black titanium dioxide obtained in step c with 50 mL of deionized water and 50 mL of ethanol respectively until the pH is 7, and dry to obtain the final nano-black titanium dioxide photocatalyst.

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Abstract

The invention relates to a preparation method for a nanometer black titanium dioxide photocatalyst. The method takes trivalent titanium titanium trichloride and TiOCl as raw materials, takes sodium borohydride, ascorbic acid or hydrazine hydrate as a reducing agent, and employs a hydrothermal synthesis process for preparing the nanometer black titanium dioxide photocatalyst. By introducing Ti<3+> into the titanium dioxide photocatalyst and performing oxygen vacancy, absorption performance of a titanium dioxide material in ultraviolet light region, visible light region and infrared light region is enhanced, and by adjusting the usage amount of the reducing agent, the color of the nanometer titanium dioxide photocatalyst is adjusted.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and relates to a preparation method of nanometer black titanium dioxide photocatalyst. Background technique [0002] Photocatalytic technology is an emerging technology developed in the past three decades, and has broad application prospects in the fields of energy and the environment. Titanium dioxide is the most widely used photocatalytic material in photocatalytic technology. Due to its stable chemical properties, high photocatalytic efficiency, and environmental friendliness, it is considered to be the most promising material in photocatalytic technology. However, the traditional titanium dioxide photocatalytic material is a white powder, which can only absorb ultraviolet light and be excited to generate photogenerated charges, and then play the role of photocatalytic oxidation or photoelectric conversion, and cannot fully utilize most of the energy in sunlight. . [0003] In recent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J37/10
CPCB01J21/063B01J35/004B01J37/10
Inventor 朱云庆王传义
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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