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Novel Mo-To monocrystal oxide nanometer material, preparation thereof and application

A technology of single crystal oxides and nanomaterials, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc. The problem of chemical instability and low absorption coefficient has been solved, and the preparation method is simple and fast, the photocatalytic effect is continued, and the cost of raw materials is low.

Inactive Publication Date: 2017-07-07
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

TiO 2 The modification method mainly focuses on the following three aspects: noble metal compounding, non-metal element doping and photosensitization, but the cost of noble metal compounding is high, and non-metal doped TiO 2 In the visible light region, the absorption coefficient is low, the photosensitization of organic dyes is unstable, and the photosensitization of narrow-band semiconductors is prone to photocorrosion. Therefore, it is urgent to develop a stable, low-cost, and mass-produced effective modification method to improve TiO 2 Utilization of light energy in the visible light region

Method used

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  • Novel Mo-To monocrystal oxide nanometer material, preparation thereof and application
  • Novel Mo-To monocrystal oxide nanometer material, preparation thereof and application
  • Novel Mo-To monocrystal oxide nanometer material, preparation thereof and application

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preparation example Construction

[0030] Mo-TiO of the present invention 2 The preparation of nanomaterials, more specifically, as an example, may include the following steps:

[0031] First, configure the mixed solution: slowly add a certain amount of Mo salt (such as ammonium molybdate) into the aqueous solution, stir at room temperature to make it fully mixed, and adjust the pH of the solution to between 0 and 3; add an appropriate amount of chelate to the reaction system Mixture (such as hydrofluoric acid), stir evenly;) Slowly add a certain amount of Ti salt (such as tetrabutyl titanate) into the aqueous solution of Mo salt, stir at room temperature to make it fully mixed.

[0032] Then, the nanometer material is obtained after hydrothermal insulation and calcination: the mixed solution is added into a hydrothermal kettle, and the hydrothermal insulation is carried out at a certain temperature for a certain period of time. After the reaction is completed, cool, centrifuge, and dry to obtain a powder samp...

Embodiment 1

[0037] Slowly add 0.3g of ammonium molybdate into 1ml of aqueous solution, stir at room temperature to make it fully mixed, and add a small amount of dilute hydrochloric acid to adjust the pH of the solution to 2. Add 1.5ml of hydrofluoric acid into the reaction system and stir evenly. Slowly add 5ml of tetrabutyl titanate into the aqueous solution of ammonium molybdate, stir at room temperature to make it fully mixed. Add the mixed solution into a hydrothermal kettle and heat it to 150°C for 10h. After the reaction is completed, cool, centrifuge, and dry to obtain a powder sample. The powder sample was calcined at 400 °C for 1 h to remove the surface organic matter and obtain Mo-TiO 2 nanoparticles.

[0038] figure 1 Mo-TiO 2 The transmission electron microscope (TEM) photo and the corresponding element distribution can be seen from the photo: Mo in TiO 2 Evenly distributed on the substrate, and Mo-TiO 2 It is single crystal.

[0039] figure 2 For a single Mo-TiO 2...

Embodiment 2

[0047] Slowly add 0.63g of sodium molybdate into 3ml of aqueous solution, stir at room temperature to make it fully mixed, and add a small amount of dilute hydrochloric acid to adjust the pH of the solution to 0. Add 500 mg of polyvinylpyrrolidone into the reaction system and stir evenly. Slowly add 10ml of titanium isopropoxide into the aqueous solution of ammonium molybdate, stir at room temperature to make it fully mixed. Add the mixed solution into a hydrothermal kettle and heat it to 200°C for 10h. After the reaction is completed, cool, centrifuge, and dry to obtain a powder sample. The powder sample was calcined at 500 °C for 1.5 h to remove the surface organic matter and obtain Mo-TiO 2 nanoparticles.

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Abstract

The invention relates to a novel Mo-To monocrystal oxide nanometer material, a preparation thereof and an application. In the nanometer material, Mo ion is replaced and mixed in a crystal lattice of TiO2, and thus an interface-free monocrystal composite oxide structure is formed; the mole ratio of Mo and Ti ions is 0.05-0.5. The novel Mo-To monocrystal oxide nanometer material has the near-infrared plasma resonance absorption property, photo-induced electron storage property, and is able to degrade pollutant at a dark place.

Description

technical field [0001] The invention relates to a novel transition metal oxide doped with a cation lattice, in particular to a novel Mo-Ti single crystal oxide nano material and its preparation and application, and belongs to the technical field of environmental catalytic materials and nano materials. Background technique [0002] Currently, nano-TiO 2 As a cheap, non-toxic, energy-saving and efficient material for photocatalytic degradation of organic pollutants in air and water, based photocatalysts have attracted widespread attention. However, due to its wide band gap, it can only be excited by ultraviolet light, and the solar spectrum only contains about 3% of ultraviolet light, which greatly limits its practical application in environmental purification. Nano TiO 2 Effective modification to improve its utilization of light energy in the visible region has become a current research hotspot. TiO 2 The modification method mainly focuses on the following three aspects: ...

Claims

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Application Information

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IPC IPC(8): B01J23/28B01D53/86C02F1/30
CPCB01D53/86C02F1/30B01J23/28C02F2305/10B01J35/393B01J35/23B01J35/39
Inventor 徐颖峰施剑林张玲霞魏晨阳
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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