Ag-doped TiO2 material, and preparation method and application thereof

A solvothermal method, silver nitrate technology, applied in nanotechnology, chemical instruments and methods, nanotechnology and other directions for materials and surface science, can solve problems such as affecting performance, difficult structure of nanomaterials, complicated preparation process, etc. Achieve the effect of easy separation, simple preparation process and high catalytic efficiency

Inactive Publication Date: 2014-04-02
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is that the existing Ag-doped sea urchin-like TiO 2 The preparation process of nanomaterials is complex, TiO 2 The structure of nanomaterials is difficult to control, which affects its performance

Method used

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  • Ag-doped TiO2 material, and preparation method and application thereof
  • Ag-doped TiO2 material, and preparation method and application thereof
  • Ag-doped TiO2 material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 0.1125g of silver nitrate and dissolve it in 15ml of ethylene glycol, and ultrasonically disperse it evenly for 30min; weigh 0.6ml of butyl titanate, and drop it into the above solution under mechanical stirring at a speed of 300r / min, and continue to stir for 2.5 h, make it mix evenly; transfer the obtained mixture to a 50ml reaction kettle, keep it warm at 200°C for 24h, after it cools down, filter it with suction, wash it repeatedly with ethanol, and dry it in vacuum at 60°C for 12h to get Ag-doped Urchin-like TiO 2 Nano-structure.

[0027] The as-prepared samples were observed with a high-resolution transmission electron microscope, such as figure 1 As shown, the morphology is a sea urchin-like structure, and the extended nanofibers have a diameter of 20-80nm and a length of about 500nm. Ag doped TiO 2 The overall diameter of the material is 1 μm, and the diameter of doped Ag clusters is 1-2 nanometers distributed in TiO 2 Inside and on the surface of the f...

Embodiment 2

[0029] Weigh 0.225g of silver nitrate and dissolve it in 15ml of ethylene glycol, and ultrasonically disperse it evenly for 30min; weigh 0.6ml of butyl titanate, and drop it into the above solution under mechanical stirring at a speed of 300r / min, and continue to stir for 2.5 h, make it mix evenly; transfer the obtained mixture to a 50ml reaction kettle, keep it warm at 240°C for 14h, after cooling, filter it with suction, wash it repeatedly with ethanol, and dry it in vacuum at 60°C for 12h to obtain Ag-doped Urchin-like TiO 2 Nano-structure.

[0030] After characterization and analysis, it can be seen that the sample presents a sea urchin-like structure, the extended nanofibers have a diameter of 10-60nm and a length of about 300nm, the overall diameter of the catalyst is 500nm, and the doped Ag clusters have a diameter of 0.1-2nm and are distributed on TiO 2 Inside and on the surface of the fiber; the diameter of Ag nanoparticles is about 2-40nm, most of them adhere to the...

Embodiment 3

[0032]Weigh 0.45g of silver nitrate and dissolve it in 15ml of ethylene glycol, and disperse it evenly by ultrasonication for 30min; weigh 0.6ml of butyl titanate, drop it into the above solution under mechanical stirring at a speed of 300r / min, and continue stirring for 2.5 h, make it mix evenly; transfer the obtained mixture to a 50ml reaction kettle, keep it warm at 280°C for 4h, after it cools down, filter it with suction, wash it repeatedly with ethanol, and dry it in vacuum at 60°C for 12h to get Ag-doped Urchin-like TiO 2 Nano-structure.

[0033] After characterization and analysis, it can be seen that the sample presents a sea urchin-like structure, and many black Ag nanoparticles aggregates are gathered around the sea urchin shape. The extended nanofibers have a diameter of 10-40nm and a length of about 230nm. The overall diameter of the catalyst is 450nm. Miscellaneous Ag clusters with a diameter of 0.1-2 nm are distributed on TiO 2 Inside and on the surface of the...

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Abstract

The invention relates to an Ag-doped TiO2 material, a preparation method and an application of the Ag-doped TiO2 material, and belongs to the technical field of preparation of semiconductor-doped catalytic materials. The preparation method is a one-step solvent hot method, and specifically comprises the following steps: completely dissolving silver nitrate into ethylene glycol; dropwise adding butyl titanate; carrying out suction filtration and drying on the solution after the solution is reacted and cooled to obtain an Ag-doped urchin-shaped TiO2 material, wherein the material is urchin-shaped, a TiO2 crystal form is a single phase of anatase and rutile or the mixed phase of the anatase and the rutile, and the material can be used in the field of photocatalysts. The Ag-doped TiO2 material, the preparation method and the application have the beneficial effects that the preparation method is a simple one-step solvothermal method; an Ag nano-particle-doped urchin-shaped TiO2 catalyst can be prepared in large batches by using the preparation method; the obtained sample is not required to be subjected to subsequent calcining treatment and has high photocatalytic activity; the structure and the shape of the obtained product are easy to control; the preparation process is simple and environment-friendly; the Ag-doped TiO2 material is expected to be applied to the aspect of treating organic pollutants which are difficult to degrade.

Description

technical field [0001] The invention belongs to the technical field of preparation of semiconductor-doped catalytic materials, in particular to an Ag-doped sea urchin-like TiO 2 Nanocatalyst and its one-step solvothermal preparation method. Background technique [0002] In recent years, TiO with special structure and morphology 2 It has become a research hotspot, such as monodisperse quantum dots, nanotubes (wires), flower-like structures, core-shell structures, etc., because of their applications in solar energy storage and utilization, photoelectric conversion, photochromism, photocatalytic degradation of the atmosphere and It has excellent performance and broad application prospects in terms of pollutants in water. [0003] Low-dimensional nanomaterials, such as zero-dimensional (quantum dots) and one-dimensional materials (nanowires, nanotubes), have a much larger specific surface area than bulk materials, and thus exhibit greater activity than bulk materials. However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50B82Y30/00C02F1/32
CPCY02W10/37
Inventor 杨穆王戈王朋贺佳彭超豪
Owner UNIV OF SCI & TECH BEIJING
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