Bulk-phase doped nano-photocatalysis material, preparation method thereof and application of material

A photocatalytic material and a technology for catalytic materials are applied in the field of bulk doped nano-photocatalytic materials and their preparation, and can solve the problems of increasing the difficulty of photocatalytic materials and the like

Inactive Publication Date: 2019-03-19
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are only a few photocatalytic materials with "memory effect" of photogenerated charges, all of which realize their "memory effect" through heterostructure construction. The contact surface and energy band match, which greatly increases the difficulty of constructing this type of photocatalytic material

Method used

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  • Bulk-phase doped nano-photocatalysis material, preparation method thereof and application of material
  • Bulk-phase doped nano-photocatalysis material, preparation method thereof and application of material
  • Bulk-phase doped nano-photocatalysis material, preparation method thereof and application of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The bulk phase-doped nano-photocatalytic material prepared in this example is a titanium dioxide nanotube material doped with molybdenum element in the bulk phase, and the specific process is as follows:

[0031] 1. Mix titanium sponge and molybdenum powder evenly according to the atomic ratio of 95:5, put them into a non-consumable vacuum electric arc furnace and repeatedly smelt them at 3000°C for more than three times to make them evenly mixed to obtain Ti-5Mo alloy. The Ti-5Mo alloy ingot was subjected to homogenization annealing in a tubular heat treatment furnace, the heating rate was 5 °C / min, the annealing temperature was 1000 °C, the holding time was 4 h, and then directly quenched to room temperature in 15 wt.% NaCl aqueous solution, A single-phase Ti-5Mo alloy is obtained.

[0032] 2. Put the single-phase alloy in the fluorine-containing electrolyte, and use the electrochemical anodic oxidation method for oxidation treatment; wherein: the fluorine-containing ...

Embodiment 2

[0035] The bulk phase-doped nano-photocatalytic material prepared in this example is a titanium dioxide nanotube material doped with tungsten element bulk phase, and the specific process is as follows:

[0036] 1. Mix titanium sponge and tungsten powder evenly according to the atomic ratio of 90:10, put them into a non-consumable vacuum electric arc furnace and repeatedly smelt them at 3500°C for more than three times to make them evenly mixed to obtain Ti-10W alloy. The Ti-10W alloy ingot was subjected to homogenization annealing in a tubular heat treatment furnace, the heating rate was 10°C / min, the annealing temperature was 1400°C, the holding time was 6h, and then directly quenched to room temperature in 15wt.% NaCl aqueous solution, A single-phase Ti-10W alloy was obtained.

[0037] 2. Put the single-phase alloy in the fluorine-containing electrolyte, and use the electrochemical anodic oxidation method for oxidation treatment; wherein: the fluorine-containing electrolyte ...

Embodiment 3

[0040] 1. With a wavelength of 254nm and a light intensity of 6mW / cm 2 The ultraviolet lamp tube was used as the light source, and the Ti-5Mo-O nanotube material prepared in Example 1 was pre-irradiated for 8 hours at a temperature of 20° C. and a relative humidity of 50%.

[0041] 2. After the irradiation, put the Ti-5Mo-O nanotube material into the X-ray photoelectron spectrometer to test the XPS spectrum, and compare it with the XPS spectrum of the original sample without UV pre-irradiation. From image 3 It can be seen that after UV irradiation, some molybdenum elements in Ti-5Mo-O change from +6 valence to +5 valence, realizing the capture and storage of photogenerated electrons under light.

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Abstract

The invention discloses a bulk-phase doped nano-photocatalysis material, a preparation method thereof and an application of the material, and belongs to the technical field of inorganic non-metallic nano-material preparation, solar energy utilization and environmental protection. The bulk-phase doped nano-photocatalysis material is a single-phase titanium dioxide material, doped ions with electroncapturing and storing capability are uniformly dispersed in a bulk-phase of titanium dioxide, so that doped elements keep activity for a long time without illumination in such a manner that the dopedelements store photo-generated charge under illumination and release the photo-generated charge after illumination is closed to generate active groups, pollutants in environments are continuously treated by sunlight in a full time manner, the nano-photocatalysis material solves the problem that the reaction activity of an existing photocatalysis material is rapidly lost after energy supply of anoutside light source is lost, treatment effects of a photocatalysis technique on environmental pollution are greatly improved, and treatment cost and energy consumption are reduced.

Description

technical field [0001] The invention relates to the technical fields of preparation of inorganic non-metallic nanometer materials, solar energy utilization and environmental protection, in particular to a bulk phase doped nanometer photocatalytic material and its preparation method and application. Background technique [0002] Photocatalytic technology has great application value in environmental pollution control and clean energy production. In recent years, researchers have developed a series of high-efficiency photocatalytic materials, which greatly improved the utilization efficiency of sunlight. However, the existing photocatalytic materials will not be able to generate electron-hole pairs after losing the energy supply of the external light source, so that they will not be able to generate active groups, and their reactivity will be lost rapidly, making it impossible to continue to treat pollutants in the environment. Therefore, existing photocatalytic materials canno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01J23/30C02F1/30A61L9/18C02F101/30
CPCA61L9/18B01J23/28B01J23/30B01J35/004C02F1/30C02F2101/308
Inventor 李琦杨炜沂冯凡
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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