Preparation technology of carbon-yttrium modified titanium dioxide photocatalyst

A titanium dioxide and photocatalyst technology is applied in the field of preparation technology of carbon yttrium modified titanium dioxide photocatalyst to achieve the effects of improving photocatalytic performance, increasing specific surface area and inhibiting grain size growth

Inactive Publication Date: 2017-05-31
HEBEI MILSON TITANIUM DIOXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal-modified TiO 2 There are certain drawbacks in photocatalysts, and there are great limitations on the modification of photocatalysts. Therefore, the study further improves the TiO 2 Photocatalyst technology is an urgent problem to be solved

Method used

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  • Preparation technology of carbon-yttrium modified titanium dioxide photocatalyst
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  • Preparation technology of carbon-yttrium modified titanium dioxide photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation technology of carbon yttrium modified titanium dioxide photocatalyst, concrete steps comprise:

[0026] a. Prepare solution Ⅰ, prepare 180ml ethanol CH 3 CH 2 OH, 60ml tetrabutyl titanate C 16 h 36 o 4 Ti, 10ml glacial acetic acid C 2 h 4 o 2 , 10ml deionized water, mixed for later use;

[0027] b. Prepare solution II and prepare ethanol CH 3 CH 2 OH, 1.4g yttrium nitrate Y (NO 3 )·6H 2 O, deionized water, the mass ratio is CH 3 CH 2 OH: Y (NO 3 )·6H 2 O: H 2 O=8:1:1, use dilute nitric acid with a concentration of 2mol / L to control the pH value to 2-3, mix and set aside;

[0028] c. To prepare a mixed solution, put solution I in a stirrer, slowly add solution II dropwise under vigorous stirring at 1250-1300r / min, and then drop D-glucose C with a concentration of 2mol / L 6 h 12 o 6 ·H 2 O, the dosage is 4.5ml;

[0029] d. Stir the mixed solution obtained in step c continuously under the condition of 1250-1300r / min until it becomes a gel,...

Embodiment 2

[0033] The preparation technology of carbon yttrium modified titanium dioxide photocatalyst, concrete steps comprise:

[0034] a. Prepare solution Ⅰ, prepare 180ml ethanol CH 3 CH 2 OH, 60ml tetrabutyl titanate C 16 h 36 o 4 Ti, 10ml glacial acetic acid C 2 h 4 o 2 , 10ml deionized water, mixed for later use;

[0035] b. Prepare solution II and prepare ethanol CH 3 CH 2 OH, 2.5g yttrium nitrate Y (NO 3 )·6H 2 O, deionized water, the mass ratio is CH 3 CH 2 OH: Y (NO 3 )·6H 2 O: H 2 O=8:1:1, use dilute nitric acid with a concentration of 2mol / L to control the pH value to 2-3, mix and set aside;

[0036] c. To prepare a mixed solution, put solution I in a stirrer, slowly add solution II dropwise under vigorous stirring at 1250-1300r / min, and then drop D-glucose C with a concentration of 2mol / L 6 h 12 o 6 ·H 2 O, the dosage is 150ml;

[0037] d. Stir the mixed solution obtained in step c continuously under the condition of 1250-1300r / min until it becomes a ge...

Embodiment 3

[0042] A preparation process of carbon yttrium modified titanium dioxide photocatalyst, comprising the process steps of doping C and Y in titanium dioxide, the process of doping elements in titanium dioxide includes the steps of doping yttrium and doping carbon, and the specific steps include:

[0043] a. Prepare solution Ⅰ, prepare 22ml ethanol CH 3 CH 2 OH, 8ml tetrabutyl titanate C 16 h 36 o 4 Ti, 1.5ml glacial acetic acid C 2 h 4 o 2 , 1.5ml deionized water, mixed for later use;

[0044] b. Prepare solution II and prepare ethanol CH 3 CH 2 OH, 1.44g yttrium nitrate Y (NO 3 )·6H 2 O, deionized water, the mass ratio is CH 3 CH 2 OH: Y (NO 3 )·6H 2 O: H 2 O=10:3:3, use dilute nitric acid with a concentration of 2mol / L to control the pH value to 2-3, mix and set aside;

[0045] c. To prepare a mixed solution, put solution I in a stirrer, slowly add solution II dropwise under vigorous stirring at 1250-1300r / min, and then drop D-glucose C with a concentration of ...

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Abstract

The invention relates to a preparation technology of a carbon-yttrium modified titanium dioxide photocatalyst, belonging to the technical field of modified titanium dioxide photocatalysts. The preparation technology comprises the steps of preparing precursor sol by taking tetrabutyl titanate as a raw material and adopting a sol-gel method; then, doping the precursor sol with modifying elements, and stirring to obtain gel; drying, crushing and calcining the gel to obtain modified titanium dioxide. According to the preparation technology, the doped modifying elements are C and Y; the concrete process of doping the modifying elements comprises the steps of firstly, dropwise adding a yttrium nitrate solution into the precursor sol, then dropwise adding a glucose solution, and controlling the molar ratio of the Y to the C to the TiO2 in the modified titanium dioxide to be (0.002-0.006): (0.06-0.54): 1. The preparation technology is simple in operation, creatively enables the titanium dioxide to be doped with the C and the Y, and achieves a synergistic effect by combining the titanium dioxide with the C and the Y; furthermore, the doped Y and C can effectively inhibit the increment of the grain size of the titanium dioxide, so that the specific surface area of the titanium dioxide is enlarged, and the photocatalytic performance of the titanium dioxide is improved.

Description

technical field [0001] The invention belongs to the field of modified titanium dioxide photocatalysts, and relates to a preparation process of modified titanium dioxide photocatalysts, in particular to a preparation process of carbon yttrium modified titanium dioxide photocatalysts. This process is simple to operate, creatively doping C and Y into titanium dioxide, the combination of the two has a synergistic effect, and doping yttrium and carbon at the same time can effectively inhibit the growth of titanium dioxide grain size and increase the specific surface area of ​​modified titanium dioxide. Improve the photocatalytic performance of titanium dioxide. Background technique [0002] Titanium dioxide has outstanding advantages such as strong chemical stability, mild reaction conditions, and no secondary pollution, so it has broad application prospects. However, the anatase titanium dioxide has a large band gap energy (Eg=3.2eV), and electrons and holes are prone to recomb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/00B01J37/03C02F1/30C02F101/30
CPCB01J23/00B01J35/004B01J35/006B01J37/036C02F1/30C02F2101/308C02F2305/10
Inventor 张建平张川张千
Owner HEBEI MILSON TITANIUM DIOXIDE
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