A copper-doped tio with an extremely low bandgap 2 Preparation method of nanoparticles

A nanoparticle and copper doping technology, applied in the field of spectroscopy, can solve the problem of low band gap energy value and achieve the effect of low band gap energy

Inactive Publication Date: 2021-08-10
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, using the wet impregnation method, the bandgap energy value is relatively high, between 2.40eV and 2.83eV, and the Cu doping amount is between 2% and 10%, to prepare copper-doped TiO with a low bandgap energy value. 2 Not yet reported

Method used

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  • A copper-doped tio with an extremely low bandgap <sub>2</sub> Preparation method of nanoparticles
  • A copper-doped tio with an extremely low bandgap <sub>2</sub> Preparation method of nanoparticles
  • A copper-doped tio with an extremely low bandgap <sub>2</sub> Preparation method of nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A copper-doped TiO with an extremely low bandgap 2 A method for preparing nanoparticles, specifically comprising the following steps:

[0021] (1) Add 2g of CuCl 2 • 2H 2 Put O into 100mL of water at 2°C to obtain liquid A;

[0022] (2) Under the condition of magnetic stirring, add 45mL of titanium tetra-n-butoxide dropwise to the liquid A in step (1), the dropping speed is 0.3mL / s, and continue to stir for 30min after the dropwise addition to obtain the liquid B, the magnetic stirring speed 1400rpm;

[0023] (3) Add 4 mL of nitric acid dropwise to liquid B in step (2), the mass fraction of nitric acid is 60%, and the dropping rate of nitric acid is 0.1 mL / s, and continue stirring for 30 minutes after the addition is completed to obtain liquid C;

[0024] (4) Liquid C in step (3) is dried on a vacuum rotary suction cup at 50°C, and then heated to 90°C on a vacuum rotary suction cup to dry until the water is completely eliminated;

[0025] (5) The product of step (4...

Embodiment 2

[0028] A copper-doped TiO with an extremely low bandgap 2 A method for preparing nanoparticles, specifically comprising the following steps:

[0029] (1) Add 5g of CuCl 2 • 2H 2 Put O into 100mL of water at 4°C to obtain liquid A;

[0030] (2) Under the condition of magnetic stirring, add 48mL of titanium tetra-n-butoxide dropwise to liquid A in step (1), and continue to stir for 35 minutes after the addition is completed. The dropping speed of titanium tetra-n-butoxide is 0.5mL / s, and For liquid B, the magnetic stirring speed is 1500rpm;

[0031] (3) Add 5 mL of nitric acid dropwise to liquid B in step (2), the mass fraction of nitric acid is 65%, and the dropping speed of nitric acid is 0.15 mL / s, and continue stirring for 35 minutes after the addition is completed to obtain liquid C;

[0032] (4) Liquid C in step (3) is dried on a vacuum rotary suction cup at 55°C, and then heated to 95°C on a vacuum rotary suction cup to dry until the water is completely eliminated;

...

Embodiment 3

[0035] A copper-doped TiO with an extremely low bandgap 2 A method for preparing nanoparticles, specifically comprising the following steps:

[0036] (1) Add 8g of CuCl 2 • 2H 2 Put O into 100mL of water at 5°C to obtain liquid A;

[0037] (2) Under the condition of magnetic stirring, add 50mL of titanium tetra-n-butoxide dropwise to the liquid A in step (1), and continue to stir for 40 minutes after the addition is completed. The dropping speed of titanium tetra-n-butoxide is 0.6mL / s, and For liquid B, the magnetic stirring speed is 1600rpm;

[0038] (3) Add 6 mL of nitric acid dropwise to liquid B in step (2), the mass fraction of nitric acid is 70%, and the dropping speed of nitric acid is 0.2 mL / s, and continue stirring for 40 minutes after the addition is completed to obtain liquid C;

[0039] (4) Liquid C in step (3) is dried on a vacuum rotary suction cup at 60°C, and then heated to 100°C on a vacuum rotary suction cup to dry until the water is completely eliminated...

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Abstract

The invention discloses a copper-doped TiO with an extremely low band gap 2 Preparation method of nanoparticles, CuCl 2 • 2H 2 Put O into water to obtain liquid A; under magnetic stirring conditions, add titanium tetra-n-butoxide dropwise to liquid A, and continue stirring to obtain liquid B after the addition; add nitric acid dropwise to liquid B, and continue to Stir to obtain liquid C; after drying, liquid C is kept at 420°C~460°C for 1~2h to obtain copper-doped TiO with a very low band gap 2 Nanoparticles; Copper-doped TiO prepared by the present invention 2 Nanoparticles have good photocatalytic activity and have important application value in environmental protection such as pollutant degradation.

Description

technical field [0001] The present invention relates to a copper-doped TiO with an extremely low bandgap 2 The invention relates to a method for preparing nanoparticles, which belongs to the field of spectroscopy. Background technique [0002] Due to TiO 2 With the advantages of good commercial properties, optical and electronic properties, chemical stability and low toxicity, they have been extensively studied as heterogeneous catalysts or semiconductors. In order to broaden the TiO 2 In the application range of these fields, doping modification has become one of the most important means. For example, the following elements are used as doping elements for photocatalyst applications: Fe, Cr, C, N, Bi. In spectroscopic applications, doped TiO 2 Ni, V, Yb, etc. are used as doping elements in the application research of semiconductors in dye-sensitized solar cells. Among them, Cu doping is widely used in different applications, and the preparation methods are divided into...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B82Y30/00B82Y40/00C02F1/30C02F101/34C02F101/38
Inventor 严继康陈俊宇刘明姜贵民甘国友杜景红张家敏易健宏
Owner KUNMING UNIV OF SCI & TECH
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