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Preparation method of supported visible-light response WO3/{001}TiO2 compound photocatalyst

A load-type, visible light technology, applied in the field of photocatalytic material research, can solve problems such as the inability to guarantee the adhesion of ordinary deposition methods, complex electrospinning technology, and high technical requirements of magnetic sputtering, so as to improve separation efficiency and visible light utilization The efficiency and reaction speed are easy to control and the preparation process is simple

Inactive Publication Date: 2015-06-10
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Polymer / TiO 2 The good permeability of nano-hybrid fibers is a new research trend in recent years, but the electrospinning technology is more complicated, the magnetic sputtering method has higher technical requirements, and the ordinary deposition method cannot guarantee sufficient adhesion. , if we can start with easy-to-operate methods such as hydrothermal and deposition, and develop a low-temperature loading technology with better loading effect, it will be of great significance for the application of polymer nanofiber carriers that cannot withstand high temperatures

Method used

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  • Preparation method of supported visible-light response WO3/{001}TiO2 compound photocatalyst
  • Preparation method of supported visible-light response WO3/{001}TiO2 compound photocatalyst
  • Preparation method of supported visible-light response WO3/{001}TiO2 compound photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] with WO 3 with TiO 2 The molar ratio is 1:10 as an example to prepare the loaded visible light-responsive WO 3 / {001}TiO 2 The method of composite photocatalyst is realized by the following steps:

[0028] (1) Carrier pretreatment

[0029] Soak the light-transmitting polyester fiber carrier with 0.5mol / L sodium hydroxide solution for 2 hours, wash it repeatedly with distilled water, and dry it for later use;

[0030] (2)﹛001﹜Anatase TiO with exposed facets 2 Single crystal preparation

[0031] ① Measure 30.4mL of absolute ethanol and add it to 35.2mL of butyl titanate, so that the molar ratio of butyl titanate and absolute ethanol is 1:5, mix well, and then prepare a mixed solution of A;

[0032] ② Measure 180mL of deionized water, add 20.2mL of HF, make the molar ratio of HF and deionized water is 1:22, and mix well to obtain the B mixture;

[0033] ③Add the mixed solution of A to the mixed solution of B dropwise, the dropping speed is controlled at 2 drops per ...

Embodiment 2

[0038] with WO 3 with TiO 2 The molar ratio is 1:1 as an example to prepare the loaded visible light-responsive WO 3 / {001}TiO 2 The method of composite photocatalyst is realized by the following steps:

[0039] (1) Carrier pretreatment

[0040] Soak the light-transmitting polyester fiber carrier with 0.5mol / L sodium hydroxide solution for 1 hour, wash it repeatedly with distilled water, and dry it for later use;

[0041] (2)﹛001﹜Anatase TiO with exposed facets 2 Single crystal preparation

[0042] ① Measure 30.4mL of absolute ethanol and add it to 35.2mL of butyl titanate, so that the molar ratio of butyl titanate and absolute ethanol is 1:5, mix well, and then prepare a mixed solution of A;

[0043] ② Measure 180mL of deionized water, add 20.2mL of HF, make the molar ratio of HF and deionized water is 1:22, and mix well to obtain the B mixture;

[0044] ③Add the mixed solution of A to the mixed solution of B dropwise, and the dropping speed is controlled at 3 drops pe...

Embodiment 3

[0049] with WO 3 with TiO 2 The molar ratio is 1:100 as an example to prepare the loaded visible light-responsive WO 3 / {001}TiO 2 The method of composite photocatalyst is realized by the following steps:

[0050] (1) Carrier pretreatment

[0051] Soak the light-permeable carrier in 0.5mol / L sodium hydroxide solution for 1 hour, wash it repeatedly with distilled water, and dry it for later use;

[0052] (2)﹛001﹜Anatase TiO with exposed facets 2 Single crystal preparation

[0053] ① Measure 30.4mL of absolute ethanol and add it to 35.2mL of butyl titanate, so that the molar ratio of butyl titanate and absolute ethanol is 1:10, mix well, and then prepare a mixed solution of A;

[0054] ② Measure 185mL of deionized water, add 20.2mL of HF, make the molar ratio of HF and deionized water is 1:20, and mix well to obtain the B mixture;

[0055] ③Add the mixed solution of A to the mixed solution of B dropwise, and the dropping speed is controlled at 2 drops per second, so that ...

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Abstract

The invention relates to a preparation method of a supported visible-light response WO3 / {001}TiO2 compound photocatalyst, which comprises three steps of (1) pretreatment of a supporter, (2) preparation of {001} crystal face exposure anatase TiO2 single crystals, and (3) preparation of the supported compound photocatalyst, the support supported catalyst with TiO2 as a center and coated with a WO3 core-shell structure is prepared, the characteristic that the tungsten trioxide (WO3) is taken as a narrow-gap (2.8eV) n-type semiconductor, and can be excited in a visible light range is fully utilized, the energy level difference between two semiconductor materials is utilized to effectively separate charges, the separating efficiency of a photon-generated carrier and the utilization rate of visible light are improved, the photocatalytic activity is high and unlikely to be lost, the catalytic activity is preserved for a long time, furthermore, the preparation process is simple, the reaction condition is mild, the reaction speed is easy to control, the cost is low, and the method is applicable to industrial promotion and application.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials research, in particular to a loaded visible light-responsive WO 3 / {001}TiO 2 Preparation method of composite photocatalyst. Background technique [0002] TiO 2 Due to the advantages of strong oxidation ability, high catalytic activity, stable physical and chemical properties, low price, and non-toxicity, it is widely used in photocatalytic fields such as wastewater treatment, air purification, and sterilization and self-cleaning. However, the nano-catalyst particles are fine, and if they are directly filled in the reactor, they are easily carried away by the water flow, which will limit their application in actual production. This problem can be solved to a certain extent if the catalyst active component is supported on a carrier such as a porous material by a method such as gas phase, hydrothermal or sol-gel method. [0003] Supported catalyst carriers can be divided into in...

Claims

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Application Information

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IPC IPC(8): B01J31/38
Inventor 侯晨涛丁家国张倩云王炎罗婷婷同玲娜钟伟张思斯杜炎玲
Owner XIAN UNIV OF SCI & TECH
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