Preparation process of sulfur and rare-earth element doped nano titanium dioxide three-element photocatalyst

A nano-titanium dioxide and rare earth element technology, applied in the direction of light water/sewage treatment, etc., can solve the problems of inability to improve catalytic efficiency and low utilization 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 carbon doping can improve the photoresponse range of the catalyst, it cannot improve the catalytic efficiency.

Method used

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  • Preparation process of sulfur and rare-earth element doped nano titanium dioxide three-element photocatalyst
  • Preparation process of sulfur and rare-earth element doped nano titanium dioxide three-element photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 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 a beaker containing lanthanum oxide, and keep stirring at 50°C until dissolved. into a lanthanum nitrate solution, and then drying the lanthanum nitrate solution in a drying oven at 55°C to obtain a lanthanum nitrate solid;

[0025] 2) Weigh 0.5 g of lanthanum nitrate solid and add it into 25 ml of distilled water to make an aqueous solution of lanthanum nitrate; weigh 7.5 g of titanium tetrachloride and carefully pour it into a constant pressure dropping funnel, then add a drop of 7 seconds / drop under stirring conditions. Accelerate dropwise addition into a conical 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 g of thiourea and add 6 ...

Embodiment 2

[0028] 1) Weigh 4.5 grams of yttrium oxide with an electronic balance and place it in a beaker, then weigh 3.25 grams of concentrated nitric acid with a mass concentration of 65% and slowly pour it into a beaker containing yttrium oxide, and continuously stir to dissolve under 50 ° C. into yttrium nitrate solution, then drying the yttrium nitrate solution at 55°C in a drying oven to obtain yttrium nitrate solid;

[0029] 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 the constant pressure dropping funnel, then under stirring conditions, drop by 7 seconds / drop. Accelerate dropwise addition into a conical flask containing 30 ml of absolute ethanol, and control the temperature at 20°C during the dropwise addition to make a transparent titanium tetrachloride absolute ethanol solution; weigh 1.35 grams of thiourea and add 6 ml o...

Embodiment 3

[0032] 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 a beaker containing europium oxide, and continuously stir to dissolve at 50 ° C. into a europium nitrate solution, and then drying the europium nitrate solution in a drying oven at 40 °C to obtain a solid europium nitrate;

[0033]2) Weigh 0.4 grams of solid europium nitrate 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 the constant pressure dropping funnel, then under stirring conditions, drop the solution with a drop of 10 seconds / drop. Accelerate dropwise addition into a conical flask containing 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...

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Abstract

The invention relates to a preparation process of a sulfur and rare-earth element doped nano titanium dioxide three-element photocatalyst, which comprises the following steps: respectively preparing a rare-earth salt water solution, a titanium tetrachloride anhydrous ethanol solution and a thiocarbamide solution; dropwisely adding the rare-earth salt solution into a mixed solution, uniformly stirring, then simultaneously dropwisely adding the titanium tetrachloride anhydrous ethanol solution and the thiocarbamide solution, and uniformly stirring; adding activated carbon, and further uniformly stirring; and finally, aging at room temperature, drying to obtain a solid, grinding, and calcining to obtain the sulfur and rare-earth element doped nano titanium dioxide three-element photocatalyst. The sulfur and rare-earth element doped nano titanium dioxide three-element photocatalyst prepared by the invention has 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 nanometer titanium dioxide ternary photocatalyst doped with sulfur 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, it has a very low utilization rate of sunlight and can only absorb ultraviolet light. In previous studies, although doping carbon can improve the photoresponse range of the catalyst, it cannot improve the catalytic efficiency. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a preparation pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10C02F1/30
Inventor 刘保健杨军王新玲陆洪林高玉刚刘苗周晓丽杜经武苏莹师江涛王乾马武军
Owner SHAANXI UNIV OF SCI & TECH
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