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(001) surface exposure fe (ferrum) doping tio2 (titanium dioxide) multi-stage catalyst and preparation method of fe doping tio2 multi-stage catalyst

A titanium dioxide and catalyst technology, which is applied in the field of multi-level structure nanomaterial catalysis to achieve the effects of high specific surface area, simple and easy steps, and high catalytic activity

Inactive Publication Date: 2012-10-10
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on TiO 2 In the research of photocatalysts, people are still facing some problems: (1) How to inhibit the recombination of photogenerated electrons and holes, thereby improving the TiO 2 (2) How to reduce the bandgap width and broaden its light absorption range, thereby improving the utilization efficiency of solar energy
However, so far, there is no information about the Fe-doped anatase TiO with (001) plane. 2 Reports of nanomaterial catalysts, especially Fe-doped TiO 2 Microspherical Hierarchical Structure Catalysts Self-Assembled by Nanosheets

Method used

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  • (001) surface exposure fe (ferrum) doping tio2 (titanium dioxide) multi-stage catalyst and preparation method of fe doping tio2 multi-stage catalyst
  • (001) surface exposure fe (ferrum) doping tio2 (titanium dioxide) multi-stage catalyst and preparation method of fe doping tio2 multi-stage catalyst
  • (001) surface exposure fe (ferrum) doping tio2 (titanium dioxide) multi-stage catalyst and preparation method of fe doping tio2 multi-stage catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Preparation of catalyst precursor:

[0025] Accurately measure 71 ml of isopropanol (IPA) in a beaker, add 0.05 ml of diethylene triamine (DETA) and stir gently for 3 minutes. After stirring, add 3.35 ml of titanium isopropoxide ( TIP) is added to the above solvent to obtain a mixed solution. Accurately weigh 0.0027 g FeCl 3 ·6H 2 Dissolve O in the mixed solution and disperse it ultrasonically for 3 minutes. Transfer the mixed solution to a 100 ml autogenous pressure reactor, crystallize at 200°C for 24 hours, cool to room temperature after the reaction, then wash the reaction precipitate with absolute ethanol 3 times, and dry at 60°C after washing 12 Hours, get light yellow powder, recorded as 0.1%~Fe-TiO 2 NSHS-as, 0.1% is metal ion Fe 3+ With Ti 4+ 的molar ratio.

[0026] 2. Preparation of catalyst:

[0027] The catalyst precursor obtained is 0.1%~Fe-TiO 2 NSHS-as, in a tube furnace in an air atmosphere at a heating rate of 1°C / min to 400°C, calcined for 2 hours, the...

Embodiment 2

[0030] 1. Preparation of catalyst precursor:

[0031] Accurately measure 71 ml of isopropanol (IPA) in a beaker, add 0.05 ml of diethylene triamine (DETA) and stir gently for 3 minutes. After stirring, add 3.35 ml of titanium isopropoxide ( TIP) is added to the above solvent to obtain a mixed solution. Accurately weigh 0.0054 g FeCl 3 ·6H 2 Dissolve O in the mixed solution and disperse it ultrasonically for 3 minutes. Transfer the mixed solution to a 100 ml autogenous pressure reactor and crystallize it at 200°C for 24 hours. After the reaction, cool to room temperature naturally, and then wash the reaction precipitate 3 times with absolute ethanol, and then dry it at 60°C after washing 12 Hours, get light yellow powder, recorded as 0.2%~Fe-TiO 2 NSHS-as, 0.2% is metal ion Fe 3+ With Ti 4+ 的molar ratio.

[0032] 2. Preparation of catalyst:

[0033] The obtained catalyst precursor 0.2%~Fe-TiO 2 NSHS-as, in a tube furnace in an air atmosphere at a heating rate of 1°C / min to 400°C,...

Embodiment 3

[0035] 1. Preparation of catalyst precursor

[0036] Accurately measure 71 ml of isopropyl alcohol (IPA) in a beaker, add 0.05 ml of diethylenetriamine (DETA) and stir gently for 3 minutes. After stirring, add 3.35 ml of titanium isopropoxide ( TIP) is added to the above solvent to obtain a mixed solution. Accurately weigh 0.0135g FeCl 3 ·6H 2 Dissolve O in the mixed solution and disperse it ultrasonically for 3 minutes. Transfer the mixed solution to a 100 ml autogenous pressure reactor, crystallize at 200°C for 24 hours, cool to room temperature after the reaction, then wash the reaction precipitate with absolute ethanol 3 times, and dry at 60°C after washing 12 Hours, get light yellow powder, denoted as 0.5%~Fe-TiO 2 NSHS-as, 0.5% is metal ion Fe 3+ With Ti 4+ 的molar ratio.

[0037] 2. Preparation of catalyst:

[0038] The obtained catalyst precursor 0.5%~Fe-TiO 2 NSHS-as, in a tube furnace in an air atmosphere at a heating rate of 1°C / min to 400°C, calcined for 2 hours, the ...

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Abstract

The invention relates to a (001) surface exposure Fe (ferrum) doping TiO2 (titanium dioxide) multi-stage catalyst and a preparation method of the Fe doping TiO2 multi-stage catalyst and belongs to the technical field of multi-stage structure nanometer material catalysis. The catalyst consists of the following ingredients in percentage by mass: 35.5 percent to 45.5 percent of titanium, 55.5 percent to 65.5 percent of oxygen and 0.1 percent to 1 percent of Fe. A one-step in-situ solvent terminal method is adopted in the catalyst synthesis process, amorphous Fe doping TiO2 nanometer sheet layer multi-stage microspheres are adopted as precursors, a Fe-doping anatase type TiO2 multi-stage microsphere catalyst with the exposed (001) surface is obtained through the roasting, and the catalyst is applicable to visible light degradation organic matter catalysis reaction. The catalyst and the preparation method have the advantages that the catalyst has higher visible light degradation organic matter catalysis activity, the catalyst is maintained at the higher specific surface area of the nanometer materials, and the advantages of easy separation and high recovery and reutilization rate of the micrometer dimension materials are realized.

Description

Technical field [0001] The invention belongs to the technical field of multi-level structure nano-material catalysis, and in particular provides a (001) surface exposed iron-doped titanium dioxide multi-level catalyst and a preparation method. technical background [0002] Facing the global crisis of energy shortage and environmental degradation, photocatalytic technology has attracted wide attention as a green and easy solution. Photocatalytic technology usually refers to a technology that converts light energy into chemical energy by semiconductor nanomaterials under the irradiation of ultraviolet light or visible light, thereby promoting the synthesis or degradation of organic substances. TiO 2 As the earliest discovered semiconductor material with photocatalytic activity, it is considered to be the most promising photocatalyst due to its cheap, non-toxic, stable chemical properties and unique photoelectric effect. However, regarding TiO 2 People still face some problems i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745A62D3/17A62D101/20
Inventor 张慧刘婷
Owner BEIJING UNIV OF CHEM TECH
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