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Visible light response catalyst and preparation and application thereof

A catalyst and visible light technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as low catalytic activity

Inactive Publication Date: 2010-01-27
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the current research results, this type of TiO 2 The catalytic activity of the modified catalyst is not very high under sunlight irradiation

Method used

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  • Visible light response catalyst and preparation and application thereof
  • Visible light response catalyst and preparation and application thereof
  • Visible light response catalyst and preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Weigh 10.0g of magnesium nitrate and 2.88g of ammonium fluoride, dissolve them in 20ml and 10ml of deionized water respectively, and slowly add the ammonium fluoride solution dropwise into the magnesium nitrate solution under stirring to obtain a colorless colloidal liquid I. Weigh 0.069g of ammonium molybdate, dissolve it in 10ml of deionized water, add 0.6ml of ammonium sulfide solution, and stir to obtain light red solution II. The solution II was slowly added dropwise to the mixture I while stirring, and after mixing evenly, the water in the solution was removed by rotary evaporation at 80°C, and the obtained solid was dried in an oven at 90°C overnight. The dried precursor was calcined at 400°C for 2 hours in a nitrogen atmosphere, and S-1%MoO was obtained after natural cooling. x / MgF 2 catalyst.

Embodiment 2

[0029] Weigh 10.0 g of magnesium nitrate and 2.88 g of ammonium fluoride, dissolve them in 20 ml and 10 ml of deionized water respectively, slowly add the ammonium fluoride solution dropwise into the magnesium nitrate solution under stirring, and obtain a colorless colloidal liquid I. Weigh 0.344g of ammonium molybdate, dissolve it in 10ml of deionized water, add 3.2ml of ammonium sulfide solution, and stir to obtain red solution II. The solution II was slowly added dropwise to the mixture I while stirring, and after mixing evenly, the water in the solution was removed by rotary evaporation at 80°C, and the obtained solid was dried in an oven at 90°C overnight. The dried precursor was calcined at 400°C for 2 hours in a nitrogen atmosphere, and S-5%MoO was obtained after natural cooling. x / MgF 2 catalyst.

Embodiment 3

[0031] Weigh 10.0g of magnesium nitrate and 2.88g of ammonium fluoride, dissolve them in 20ml and 10ml of deionized water respectively, and slowly add the ammonium fluoride solution dropwise into the magnesium nitrate solution under stirring to obtain a colorless colloidal liquid I. Weigh 0.482g of ammonium molybdate, dissolve it in 10ml of deionized water, add 4.6ml of ammonium sulfide solution, and stir to obtain dark red solution II. The solution II was slowly added dropwise to the mixture I while stirring, and after mixing evenly, the water in the solution was removed by rotary evaporation at 80°C, and the obtained solid was dried in an oven at 90°C overnight. The dried precursor was calcined at 400°C for 2 hours in a nitrogen atmosphere, and S-7%MoO was obtained after natural cooling. x / MgF 2 catalyst.

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Abstract

The invention discloses a novel catalyst with high visible light catalytic activity, which has a chemical composition general formula of S-x%MoOx / MgF2. The preparation method comprises the following steps: (1) according to the stoichiometric proportion of MgF2, weighing magnesium nitrate and ammonium fluoride which are dissolved in deionized water respectively and then are mixed together to obtain colloidal solution I; (2) weighing ammonium molybdate, dissolving the same in the deionized water, adding the stoichiometric proportion of ammonium sulfide solution (n(S) / n(Mo)=4) to obtain solution II; and (3) mixing the solution I and the solution II, removing the moisture through rotary evaporation, drying the obtained solid, and calcinating the solid at a temperature of between 300 and 450 DEG C in a nitrogen atmosphere for 1 to 4 hours to obtain the catalyst. The catalyst has the advantages of simple preparation process, no need of adding noble metals and low cost; besides, the prepared photocatalyst has excellent activity of performing visible light catalytic degradation on organic pollutants.

Description

【Technical field】 [0001] The invention relates to a novel catalyst with high visible light catalytic activity and a preparation method. 【Background technique】 [0002] Environmental pollution is a major challenge facing mankind at present. It has led to the continuous decline in the quality of people's drinking water and industrial water sources, and the increasing air pollution has caused continuous destruction of the ecological environment, seriously affecting people's health and quality of life. Therefore, how to purify environmental pollution economically and effectively is a major scientific challenge that we must face and solve. Compared with traditional methods such as physical adsorption and chemical catalysis, photocatalytic technology has the advantages of low cost, no pollution, and wide application range. It is the most promising green environmental treatment technology in the 21st century. [0003] Practical photocatalytic materials need to have a strong abilit...

Claims

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Application Information

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IPC IPC(8): B01J27/138B01D53/72G01N33/00
Inventor 何益明吴新涛盛天录陈建珊傅瑞彪胡胜民
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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