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Efficient environment-friendly black titanium dioxide-based photocatalyst and preparation method thereof

A technology of black titanium dioxide and photocatalyst, which is applied in the field of photocatalysis, can solve the problems of low photocatalytic quantum efficiency, low sunlight utilization rate, and inability to efficiently use sunlight, etc., and achieve simple preparation process, improve photocatalytic efficiency, and inhibit recombination Effect

Inactive Publication Date: 2020-03-31
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional titanium dioxide can only absorb 5% of sunlight due to its large band gap (anatase type, 3.2eV), and the utilization rate of sunlight is low, so it cannot efficiently utilize most of the energy of sunlight.
Second, the rapid recombination of photogenerated electrons and holes leads to the TiO 2 The quantum efficiency of photocatalysis is low, which affects the TiO 2 Catalytic Activity of Semiconductor Photocatalysts

Method used

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  • Efficient environment-friendly black titanium dioxide-based photocatalyst and preparation method thereof
  • Efficient environment-friendly black titanium dioxide-based photocatalyst and preparation method thereof
  • Efficient environment-friendly black titanium dioxide-based photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] co-doped TiO 2 Preparation: (1) Add 4ml of glacial acetic acid, 0.18g of cobalt chloride, 0.08g of thiourea and 6ml of deionized water into 20ml of absolute ethanol, stir for 15 minutes, and adjust the pH to 3; (2) add 10ml of titanic acid Tetrabutyl ester was added dropwise in the ethanol (20ml) solution of acetylacetone (1ml), stirred rapidly for 20 minutes; (3) under ice-bath condition, (2) gained mixed solution was added dropwise in (1) gained mixed solution, and Stir rapidly during this process for 2 hours to obtain a yellow transparent sol, and then age for 10 hours to obtain a gel; (4) dry at a temperature of 100 ° C to obtain a light yellow powder; (5) place the obtained light yellow powder in Heat treatment at 500°C for 1.5h to finally obtain co-doped TiO 2 . figure 1 Co-doped TiO prepared for 2 Physical photo, different from the white color of traditional P25, the co-doped TiO prepared by this method 2 Black in appearance, indicating absorption of visible ...

Embodiment 2

[0073] co-doped TiO 2 Preparation: (1) Add 3ml of glacial acetic acid, 0.09g of cobalt chloride, 0.10g of nickel nitrate and 6ml of deionized water into 20ml of absolute ethanol, stir for 30 minutes, and adjust the pH to 4; (2) add 10ml of titanic acid Tetrabutyl ester was added dropwise in the ethanol (20ml) solution of acetylacetone (1ml), stirred rapidly for 15 minutes; (3) under ice-bath condition, the mixed solution obtained from (2) was added dropwise in the mixed solution obtained from (1), and Stir rapidly during this process for 2 hours to obtain a yellow transparent sol, and then age for 8 hours to obtain a gel; (4) dry at a temperature of 90°C to obtain a light yellow powder; (5) place the obtained light yellow powder in Under the condition of 500℃, the flow rate is 300sccm nitrogen protection heat treatment for 1.5h, and finally co-doped TiO 2 ;

[0074] co-doped TiO 2 Composite preparation with the supporting substrate: 0.4g co-doped TiO prepared above 2 and 0...

Embodiment 3

[0077] co-doped TiO 2 Preparation: (1) Add 4ml of glacial acetic acid, 0.01ml of phosphoric acid, 0.08g of thiourea and 6ml of deionized water into 20ml of absolute ethanol, stir for 60 minutes, and adjust the pH to 2; (2) add 10ml of tetrabutyl titanate Add the ester dropwise to the ethanol (20ml) solution of acetylacetone (1ml), and stir rapidly for 20 minutes; Stir rapidly during the process for 1 hour to obtain a yellow transparent sol, then age for 7 hours to obtain a gel; (4) dry at a temperature of 90°C to obtain a light yellow powder; (5) place the obtained light yellow powder in 500 Heat treatment at ℃ for 1.5h, and finally co-doped TiO 2 ;

[0078] co-doped TiO 2 Composite preparation with the supporting substrate: 0.4g co-doped TiO prepared above 2 and 1.2g of tin oxide nanowires were dispersed in N-methylpyrrolidone solution, stirred for 8h, then impregnated for 14h, dried at 90°C, and finally heat-treated at a temperature of 500°C with a flow rate of 200sccm n...

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Abstract

The invention relates to an efficient environment-friendly black titanium dioxide-based photocatalyst and a preparation method thereof, wherein the black titanium dioxide-based photocatalyst comprisesa loading substrate and co-doped black titanium dioxide loaded on the loading substrate, and the loading substrate is at least one selected from one-dimensional nano-tubes, one-dimensional nano-wires, one-dimensional nano-rod, one-dimensional nano-fiber and a two-dimensional layered material.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a high-efficiency and environment-friendly black titanium dioxide-based photocatalyst and a preparation method thereof. Background technique [0002] Air pollution, water eutrophication, dramatic decline in biodiversity, global spread of persistent organic pollutants, and the global ecological environment crisis are the primary challenges facing a community with a shared future for mankind. Environmental protection of the ecological environment has become our focus. Solar energy is the inexhaustible ideal energy known so far. How to efficiently convert solar energy into efficient energy for direct use by humans has become a hot research target. Photocatalytic technology is an efficient, safe and environmentally friendly science and technology that can use sunlight as energy to activate photocatalysts and drive oxidation-reduction reactions, and photocatalysts a...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J23/755B01J27/18B01J27/24
CPCB01J23/75B01J23/755B01J27/18B01J27/24B01J35/39
Inventor 黄富强王森刘战强孙甜金浩丁卫刘德朋
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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