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Large-specific-surface-area pure-phase TiO2 photocatalyst and preparation method and applications thereof

A technology with large specific surface area and photocatalyst, which can be used in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc. It can solve problems such as low quantum efficiency, achieve more active centers, and improve photocatalytic activity. simple craftsmanship

Inactive Publication Date: 2015-01-14
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But affected by TiO 2 The band gap is limited (3.2eV), it can only absorb ultraviolet light (accounting for 4% of sunlight), the quantum efficiency is low, and it can only be used for the treatment of very low concentration dye wastewater

Method used

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  • Large-specific-surface-area pure-phase TiO2 photocatalyst and preparation method and applications thereof
  • Large-specific-surface-area pure-phase TiO2 photocatalyst and preparation method and applications thereof
  • Large-specific-surface-area pure-phase TiO2 photocatalyst and preparation method and applications thereof

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Experimental program
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Effect test

Embodiment 1

[0026] Add 3.83g of glycerol into 6mL of ethanol solution, stir evenly, add 1mL of titanyl sulfate, then stir until clear, called solution A. 2g LiAc·2H 2 O was dissolved in 10 mL (DMF:HAc=4:6) mixed solution, called solution B. At room temperature, add solution B to solution A, stir well until the solution is evenly mixed, then add 3mL of anhydrous diethyl ether, stir evenly, transfer to a 100mL hydrothermal kettle, keep at 110°C for 48h, and then naturally cool to room temperature; After centrifugation and washing with deionized water and ethanol three times each, dry in a vacuum constant temperature oven at 80 °C for 12 h to obtain a large specific surface area pure phase TiO 2 catalyst of light.

Embodiment 2

[0028] Add 3.83g of glycerol into 6mL of ethanol solution, stir evenly, add 3mL of titanyl sulfate, then stir until clear, called solution A. 2g LiAc·2H 2 O was dissolved in 10 mL (DMF:HAc=4:6) mixed solution, called solution B. At room temperature, add solution B to solution A, stir well until the solution is evenly mixed, then add 3mL of anhydrous diethyl ether, stir evenly, transfer to a 100mL hydrothermal kettle, keep at 110°C for 48h, and then naturally cool to room temperature; After centrifugation and washing with deionized water and ethanol three times each, dry in a vacuum constant temperature oven at 80 °C for 12 h to obtain a large specific surface area pure phase TiO 2 catalyst of light.

Embodiment 3

[0030] Add 3.83g of glycerol into 6mL of ethanol solution, stir evenly, then add 3mL of titanyl sulfate, then stir until clear, called solution A. 3g LiAc·2H 2 O was dissolved in 10 mL (DMF:HAc=4:6) mixed solution, called solution B. At room temperature, add solution B to solution A, stir well until the solution is evenly mixed, then add 3mL of anhydrous diethyl ether, stir evenly, transfer to a 100mL hydrothermal kettle, keep at 130°C for 48h, and then naturally cool to room temperature; After centrifugation and washing with deionized water and ethanol three times each, dry in a vacuum oven at 80°C for 12 hours to obtain a pure phase of TiO with a large specific surface area. 2 catalyst of light

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Abstract

The invention discloses a large-specific-surface-area pure-phase TiO2 photocatalyst and a preparation method and applications thereof. The TiO2 photocatalyst is prepared by taking ethanol and glycerol as solvents and titanyl sulfate as a titanium source and adopting a hydrothermal one-step process, wherein the specific surface area is 350-450m<2> / g, the pore volume achieves 0.2-0.3m<3> / g, and the pore size is about 20-30nm. The pure-phase anatase TiO2 has large specific surface area and more active centers, so that the photocatalytic activity can be greatly improved. The photocatalyst can synergically produce hydrogen while efficiently degrading the high-concentration dye wastewater. Compared with the prior art, the chemical agents used are commonly used reagents, and are low-cost and easily available, the method is simple in process, the specific surface area of the synthesized photocatalyst can furthest achieve 420m<2> / g which is far greater than that of like commercial products. In addition, the photocatalyst can produce a certain amount of hydrogen while fast degrading high-concentration methyl orange (MO) under the ultraviolet irradiation.

Description

technical field [0001] The invention relates to an anatase-type titanium oxide photocatalyst, specifically a one-step method for synthesizing pure phase TiO with a large specific surface area 2 Photocatalyst and its preparation method and application. It belongs to the technical field of photocatalyst. Background technique [0002] With the growth of population and economy, environmental and energy issues have become two major factors restricting human development. Semiconductor photocatalysts have unique advantages in treating dye wastewater and producing hydrogen by photolysis of water. Compared with traditional wastewater treatment and hydrogen production methods, photocatalysis has the advantages of mild reaction conditions, low energy consumption, and less secondary pollution. It has very attractive application prospects in terms of environment and energy. In recent years, more and more researches on it many. It is well known that TiO 2 Due to the advantages of che...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J35/10C02F1/32
Inventor 李鑫钟文涛张蝶青李贵生李和兴
Owner SHANGHAI NORMAL UNIVERSITY
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