Preparation method of nano TiO2-SnO2 solid solution photocatalytic material

A photocatalytic material, solid solution technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. and other problems, to achieve the effect of shortening the preparation cycle, improving the corrosion activity, and delaying the corrosion effect.

Active Publication Date: 2020-04-28
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TiO 2 -SnO 2 The synthesis of solid solution needs to be realized by adding Sn element to Cu-Ti amorphous alloy. Sn element has a strong corrosion retarding effect, which will greatly increase th

Method used

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  • Preparation method of nano TiO2-SnO2 solid solution photocatalytic material
  • Preparation method of nano TiO2-SnO2 solid solution photocatalytic material
  • Preparation method of nano TiO2-SnO2 solid solution photocatalytic material

Examples

Experimental program
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Example Embodiment

[0029] Example 1

[0030] Step 1: Select Cu, Ti, Sn, Y raw materials with a purity of 99.99wt%, and weigh them according to the atomic percentage Cu: 60%, Ti: 30%, Sn: 6%, Y: 4%, and then prepare them. The metal raw materials and the zirconium ingots used for deoxygenation are placed in different stations of the vacuum arc furnace, and the vacuum is evacuated to 5.0×10 -3 Pa, and fill the furnace with argon with a purity of 99.9% as a protective atmosphere. During smelting, the current is adjusted in real time according to the melting state of the material, and the range is 100-200A. Note that the zirconium ingot is first melted to deoxidize, and the time is 40s, smelted once, and then the metal material is smelted, and the single smelting time is 60s, and the smelting time is 5 times, thereby preparing Cu 60 Ti 30 Sn 6 Y 4 Alloy ingot.

[0031] Step 2: Break the alloy ingot from step 1, take 5g into a special quartz tube, then fix the quartz tube directly above the copper roller ...

Example Embodiment

[0035] Example 2

[0036] Step 1: Select Cu, Ti, Sn, Al raw materials with a purity of 99.99wt%, and weigh them according to the atomic percentage Cu: 60%, Ti: 30%, Sn: 6%, Al: 4%, and then prepare them. The metal raw materials and the zirconium ingots used for deoxygenation are placed in different stations of the vacuum arc furnace and evacuated to 5.0×10 -3 Pa, and fill the furnace with argon with a purity of 99.9% as a protective atmosphere. During smelting, the current is adjusted in real time according to the melting state of the material, and the range is 100-180A. Note that the zirconium ingot is first melted to deoxidize, the time is 40s, smelted once, and then the metal material is smelted, the single smelting time is 55s, and the smelting time is 5 times, thereby preparing Cu 60 Ti 30 Sn 6 Al 4 Alloy ingot.

[0037] Step 2: Break the alloy ingot obtained in step 1, take 5g into a special quartz tube, then fix the quartz tube directly above the copper roller in the vacuum...

Example Embodiment

[0041] Example 3

[0042] Step 1: Select Cu, Ti, Sn, In raw materials with a purity of 99.99wt%, and weigh them according to the atomic percentage Cu: 60%, Ti: 30%, Sn: 6%, In: 4%, and then prepare them. The metal raw materials and the zirconium ingots used for deoxygenation are placed in different stations of the vacuum arc furnace, and the vacuum is evacuated to 5.0×10 -3 Pa, and fill the furnace with argon with a purity of 99.9% as a protective atmosphere. During smelting, the current is adjusted in real time according to the melting state of the material, and the range is 80-180A. Note that the zirconium ingot is first melted to deoxidize, and the time is 40s, smelted once, and then the metal material is smelted, and the single smelting time is 50s, and the smelting time is 5 times, thereby preparing Cu 60 Ti 30 Sn 6 In 4 Alloy ingot.

[0043] Step 2: Break the alloy ingot from step 1, take 5g into a special quartz tube, then fix the quartz tube directly above the copper rolle...

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Abstract

The invention relates to a preparation method of a nano TiO2-SnO2 solid solution photocatalytic material. Low-corrosion potential elements or an amorphous alloy with a Ti/Sn atomic ratio of 4:1 to 6:1are adopted as a precursor, nitric acid is adopted as a corrosive and an oxidant, and a nano TiO2-SnO2 solid solution is synthesized through de-alloying oxidation. The method comprises the followingspecific steps: (1) selecting four metal raw materials including Cu, Ti, Sn and low-corrosion potential active elements or three metal raw materials including Cu, Ti and Sn, and smelting the metal rawmaterials through a vacuum arc furnace to prepare an alloy melt ingot; (2) heating the alloy melt ingot by utilizing a magnetic induction coil of vacuum rotary quenching equipment, and spraying alloyliquid to the surface of a copper roller rotating at a high speed when the alloy is completely molten, so as to obtain an amorphous strip; and (3) under the condition of constant temperature, performing de-alloying oxidation treatment on the amorphous strip in a nitric acid solution. The method is simple to operate, use of a large amount of solutions and harsh reaction conditions are not involved, the minimum unit particle size of the prepared material is 3.5-6 nm, and the catalytic degradation efficiency of the prepared material on rhodamine B under 500 W ultraviolet light reaches 99% or above.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic material preparation, in particular to a nano-TiO 2 -SnO 2 Preparation method of solid solution photocatalytic material. Background technique [0002] Wide bandgap n-type semiconductor TiO 2 (E g =3.0~3.2eV) and SnO 2 (E g =3.6eV) not only has high photocatalytic activity, stable chemical properties, but also is cheap, green and pollution-free, and is considered to be a photocatalytic material with great potential, and the TiO formed based on the two 2 -SnO 2 The solid solution also has semiconductor synthesis effect and special electronic structure, so it has more excellent photocatalytic performance. It is worth mentioning that TiO 2 and SnO 2 They are very similar in terms of crystal structure characteristics, and the ionic radius and electrical characteristics are also very similar to each other, which is the reason for the formation of TiO 2 -SnO 2 Solid solutions provide fa...

Claims

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Application Information

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IPC IPC(8): B01J23/14B01J35/00B01J35/02B01J37/00B01J37/12C02F1/32C02F101/30
CPCB01J35/004B01J37/0018B01J37/12B01J35/023B01J35/0013B01J23/14C02F1/32C02F2305/10C02F2101/308
Inventor 王宁
Owner NANJING INST OF TECH
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