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Process for preparing nanometer titanium dioxide ternary photocatalyst doped with nitrogen and rare earth elements

A technology of nano-titanium dioxide and rare earth elements, which is applied in the field of preparation of nano-titanium dioxide ternary photocatalysts, can solve the problems of inability to improve catalytic efficiency and low utilization rate of sunlight

Inactive Publication Date: 2015-04-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its utilization rate of sunlight is very low, it can only absorb ultraviolet light
In previous studies, although doping with fluorine can improve the photoresponse range of the catalyst, it cannot improve the catalytic efficiency.

Method used

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  • Process for preparing nanometer titanium dioxide ternary photocatalyst doped with nitrogen and rare earth elements
  • Process for preparing nanometer titanium dioxide ternary photocatalyst doped with nitrogen and rare earth elements
  • Process for preparing nanometer titanium dioxide ternary photocatalyst doped with nitrogen and rare earth elements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1) Weigh 2.5 grams of lanthanum oxide with an electronic balance and place it in a beaker, then weigh 3.5 grams of concentrated nitric acid with a mass concentration of 65% and slowly pour it into the beaker containing lanthanum oxide, and stir continuously until dissolved at 50°C to prepare into a lanthanum nitrate solution, and then dry the lanthanum nitrate solution in a drying oven at 55°C to obtain a lanthanum nitrate solid;

[0047] 2) Weigh 0.5 grams of lanthanum nitrate solid and add 25 milliliters of distilled water to make an aqueous solution of lanthanum nitrate; weigh 7.5 grams of titanium tetrachloride and carefully pour it into a constant pressure dropping funnel, and then drop it at a rate of 7 seconds / drop under stirring conditions. Add it dropwise to an Erlenmeyer flask containing 30 ml of absolute ethanol, and control the temperature at 20°C during the dropping process to make a transparent titanium tetrachloride absolute ethanol solution; weigh 1.5 gra...

Embodiment 2

[0050] 1) Weigh 4.5 grams of yttrium oxide with an electronic balance and put it in a beaker, then weigh 3.25 grams of concentrated nitric acid with a mass concentration of 65% and slowly pour it into the beaker filled with yttrium oxide, and stir continuously at 50°C until it dissolves. into yttrium nitrate solution, and then dry the yttrium nitrate solution in a drying oven at 55°C to obtain yttrium nitrate solid;

[0051] 2) Weigh 0.35 grams of yttrium nitrate solid and add 25 milliliters of distilled water to make an aqueous solution of yttrium nitrate; weigh 8.5 grams of titanium tetrachloride and carefully pour it into a constant pressure dropping funnel, then drop it at a rate of 7 seconds / drop under stirring conditions. Add it dropwise to an Erlenmeyer flask filled with 30 ml of absolute ethanol, and control the temperature at 20°C during the dropping process to make a transparent titanium tetrachloride absolute ethanol solution; weigh 1.35 g of ammonia water and add it...

Embodiment 3

[0054] 1) Weigh 3.5 grams of europium oxide with an electronic balance and place it in a beaker, then weigh 2.75 grams of concentrated nitric acid with a mass concentration of 65% and slowly pour it into the beaker containing europium oxide, and stir continuously until dissolved at 50 ° C to prepare into a europium nitrate solution, and then dry the europium nitrate solution in a drying oven at 40°C to obtain a europium nitrate solid;

[0055] 2) Weigh 0.4 grams of europium nitrate solid and add 30 milliliters of distilled water to make an aqueous solution of europium nitrate; weigh 9.5 grams of titanium tetrachloride and carefully pour it into a constant pressure dropping funnel, and then drop it at a rate of 10 seconds / drop under stirring conditions. Add it dropwise to a conical flask filled with 30 ml of absolute ethanol, and control the temperature at 25°C during the dropping process to make a transparent titanium tetrachloride absolute ethanol solution; weigh 5 grams of ur...

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Abstract

The invention relates to a process for preparing a nanometer titanium dioxide ternary photocatalyst doped with nitrogen and rare earth elements. The process comprises the following steps of respectively preparing an aqueous solution of rare earth salt, an aqueous solution of titanium tetrachloride absolute ethanol and a nitrogen-containing compound solution; dropwise adding the aqueous solution of rare earth salt into a three-necked flask with a mixed solution, uniformly stirring and simultaneously dropwise adding the aqueous solution of titanium tetrachloride absolute ethanol and the nitrogen-containing compound solution, uniformly stirring, adding activated carbon, and further uniformly stirring; and finally aging at room temperature and drying to obtain a solid, grinding the obtained solid and calcining to obtain the nanometer titanium dioxide ternary photocatalyst doped with nitrogen and rare earth elements. The nanometer titanium dioxide ternary photocatalyst doped with nitrogen and rare earth elements, which is prepared by the process, has an efficient photocatalytic degradation effect on pollutants, especially organic pollutants.

Description

technical field [0001] The invention relates to a preparation process of a catalyst, in particular to a preparation process of a nano-titanium dioxide ternary photocatalyst doped with nitrogen and rare earth elements. Background technique [0002] Photocatalytic degradation technology is a new type of pollutant treatment technology with broad market prospects. Nano-titanium dioxide is an excellent photocatalyst with the best application potential. It has the characteristics of non-toxicity, high activity, low cost, resistance to ultraviolet light corrosion, strong acid resistance, strong alkali resistance and strong oxidant resistance. However, its utilization rate of sunlight is very low and it can only absorb ultraviolet light. In previous studies, although doping with fluorine can improve the photoresponse range of the catalyst, it cannot improve the catalytic efficiency. Contents of the invention [0003] The purpose of the present invention is to provide a preparati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
Inventor 刘保健杨军王新玲陆洪林高玉刚刘苗周晓丽于凯烁苏莹王新雒婷文高桥
Owner SHAANXI UNIV OF SCI & TECH
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