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Preparation method for blue TiO2 catalyst

A catalyst and blue technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as harsh conditions, complicated processes, and unfavorable large-scale industrial production

Inactive Publication Date: 2017-04-26
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above technical problems in the prior art, the invention provides a blue TiO 2 The preparation method of the powder, the blue TiO 2 The preparation method of the powder should solve the problem of preparing blue TiO in the prior art 2 The powder method is complicated in process and harsh in conditions, which is not conducive to the technical problems of large-scale industrial production

Method used

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  • Preparation method for blue TiO2 catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0016] 1) TiCl 4 Mix with hydrazine hydrate at a molar ratio of 1:8 to obtain TiCl 4 -hydrazine complexes;

[0017] 2) According to the mass ratio of TiCl 4 : water = 1:20, adding deionized water to the complex in (1) above to obtain TiO 2 precursor fluid of

[0018] 3) Put the precursor liquid obtained in 2) into a hydrothermal kettle, react for 20 hours at 180°C, filter with suction, wash with ethanol, and dry to obtain blue TiO 2 catalyst.

[0019] Utilize German Bruker D8 Advance to carry out XRD spectrogram test to the obtained sample, the result is as follows figure 1 . XRD spectrum and anatase TiO 2 The standard card is the same, indicating that in Example 1, the blue anatase TiO was synthesized by one-step method 2 ; From the broadening of the diffraction peaks, it can be seen that the grain size of the sample is smaller.

[0020] The blue TiO prepared in this example 2 The powder is added to a 20mg / L methyl orange solution at a mass ratio of 0.1g / 100mL. Unde...

Embodiment ２

[0022] 1) TiCl 4 Mix with hydrazine hydrate at a molar ratio of 1:10 to obtain TiCl 4 -hydrazine complexes;

[0023] 2) According to the mass ratio of TiCl 4 : water=1:25, deionized water is added in the complex in above-mentioned (1), obtains the precursor liquid of TiO2;

[0024] 3) Put the precursor liquid obtained in 2) into a hydrothermal kettle, react at 220°C for 16 hours, filter with suction, wash with ethanol, and dry to obtain blue TiO 2 catalyst.

[0025] Utilize German Bruker D8 Advance to carry out XRD spectrogram test to the obtained sample, the result is as follows figure 1 . XRD spectrum and anatase TiO 2 The standard card is the same, indicating that in Example 2, the blue anatase TiO was synthesized by one-step method 2 ; From the broadening of the diffraction peaks, it can be seen that the grain size of the sample is smaller.

[0026] The blue TiO prepared in this example 2 The powder is added to a 20mg / L methyl orange solution at a mass ratio of 0....

Embodiment 3

[0028] 1) TiCl 4 Mix with hydrazine hydrate at a molar ratio of 1:8 to obtain TiCl 4 -hydrazine complexes;

[0029] 2) According to the mass ratio of TiCl 4 : water=1:15, deionized water is added in the complex in above-mentioned (1), obtains the precursor body liquid of TiO2;

[0030] 3) Put the precursor body liquid obtained in (2) into a hydrothermal kettle, react at 220°C for 16 hours, filter with suction, wash with ethanol, and dry to obtain blue TiO 2 catalyst.

[0031] Utilize German Bruker D8 Advance to carry out XRD spectrogram test to the obtained sample, the result is as follows figure 1 . XRD spectrum and anatase TiO 2 The standard card is the same, indicating that in Example 3, the blue anatase TiO was synthesized by one-step method 2 ; From the broadening of the diffraction peaks, it can be seen that the grain size of the sample is smaller.

[0032] The blue TiO prepared in this example 2 The powder is added to a 20mg / L methyl orange solution at a mass r...

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Abstract

The invention provides a preparation method for a blue TiO2 catalyst. The preparation method for the blue TiO2 catalyst comprises the following steps that TiCl4 and hydrazine hydrate are mixed according to the molar ratio of 1: (5-10), and a TiCl4-hydrazine complex is obtained; deionized water is added into the complex according to the mass ratio of the TiCl4 and water of 1:15-30, and a TiO2 precursor body fluid is obtained; and the obtained precursor body fluid is put into a hydrothermal reactor and reacted for 16-24 hours at the temperature of 170-220 DEG C, and then, after suction filtration, washing and drying, the blue TiO2 catalyst is obtained. Through the preparation method for the blue TiO2 catalyst, the obtained blue TiO2 catalyst has a good ultraviolet-visual light response and a good photocatalytic wastewater dye degradation property under ultraviolet-visual light. A methyl orange solution of 20 mg / L can be completely degraded by blue TiO2 powder within 25 minutes, and the photocatalytic effect of the blue TiO2 powder is better than that of white TiO2.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a catalyst, specifically a blue TiO 2 Catalyst preparation method. Background technique [0002] TiO 2 As a "green technology" and "environmentally friendly technology", photocatalytic technology has the advantages of simple operation, mild reaction conditions and no secondary pollution. It is one of the research directions that have attracted much attention in the field of catalysis in the 21st century. It has huge potential and broad application prospects in large-scale applications, among which nano-titanium dioxide P25 has achieved industrial production. However, on TiO 2 As far as it is concerned, there are two problems that always restrict its performance. One is TiO 2 The bandgap width is wide, which is 3.2eV, which leads to its narrow photoresponse range, and can only absorb ultraviolet light with a wavelength of less than 380nm in sunlight, which only accounts for 4%-6%...

Claims

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Application Information

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IPC IPC(8): B01J21/06C02F1/30C02F1/32C02F101/30
CPCC02F1/30C02F1/32B01J21/063C02F2101/308C02F2305/10B01J35/39Y02W10/37
Inventor 房永征张娜张小磊刘玉峰丁艳花丁佳琪张恒
Owner SHANGHAI INST OF TECH
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