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Mesoporous silver carbonate nanorod visible light photocatalyst and preparation method thereof

A technology of nanorods and silver carbonate, which is applied in chemical instruments and methods, physical/chemical process catalysts, silver compounds, etc., to achieve the effects of simple preparation methods, many reactive sites, and low cost

Inactive Publication Date: 2015-08-19
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to a large number of literature surveys, it is found that the preparation of mesoporous silver carbonate photocatalysts is rarely reported

Method used

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  • Mesoporous silver carbonate nanorod visible light photocatalyst and preparation method thereof
  • Mesoporous silver carbonate nanorod visible light photocatalyst and preparation method thereof
  • Mesoporous silver carbonate nanorod visible light photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The diameter of each nanorod in the mesoporous silver carbonate nanorod visible light catalyst is 200~300nm, the length is 2~3μm, and the average pore diameter is 3~4nm; the degradation efficiency of the mesoporous silver carbonate nanorod visible light catalyst to methylene blue in 28min under visible light conditions Reached 96%.

[0027] The preparation method of the above-mentioned mesoporous silver carbonate nanorod visible light catalyst, its concrete steps are as follows:

[0028] Step 1. First, add 0.17 g of silver nitrate to 40 mL of deionized water and stir evenly to obtain a silver nitrate solution with a concentration of 0.025 mol / L;

[0029] Step 2. Add 0.05 g of polyvinylpyrrolidone (2 g in total) to the silver nitrate solution prepared in step 1 according to adding 0.05 g of polyvinylpyrrolidone to each milliliter of silver nitrate solution and stir fully to obtain a mixed solution;

[0030] Step 3. At room temperature, add a sodium bicarbonate solution ...

Embodiment 2

[0039] The mesoporous silver carbonate nanorod visible light catalyst, the diameter of the nanorod in the mesoporous silver carbonate nanorod visible light catalyst is 200~300nm, the length is 2~3μm, and the average pore diameter is 3~4nm; Under the conditions, the degradation efficiency of methylene blue reached 94% within 28 minutes.

[0040] The preparation method of the above-mentioned mesoporous silver carbonate nanorod visible light catalyst, its concrete steps are as follows:

[0041] Step 1. First, add 0.68 g of silver nitrate to 80 mL of deionized water and stir evenly to obtain a silver nitrate solution with a concentration of 0.05 mol / L;

[0042] Step 2. Add 0.025 g of polyvinylpyrrolidone (2 g in total) to the silver nitrate solution prepared in step 1 according to every milliliter of silver nitrate solution, and add polyvinylpyrrolidone to obtain a mixed solution;

[0043] Step 3. At room temperature, add a sodium bicarbonate solution with a concentration of 0.1m...

Embodiment 3

[0046] The diameter of the nanorods in the mesoporous silver carbonate nanorod visible light catalyst is 200~300nm, the length is 2~3μm, and the average pore diameter is 3~4nm; the degradation efficiency of the mesoporous silver carbonate nanorod visible light catalyst to methylene blue reaches 95% in 28min under the condition of visible light. %.

[0047] The preparation method of the above-mentioned mesoporous silver carbonate nanorod visible light catalyst, its concrete steps are as follows:

[0048] Step 1. First, add 0.17 g of silver nitrate to 40 mL of deionized water and stir evenly to obtain a silver nitrate solution with a concentration of 0.025 mol / L;

[0049] Step 2. Add 0.025 g of polyvinylpyrrolidone (1 g in total) to the silver nitrate solution prepared in step 1 according to adding 0.025 g of polyvinylpyrrolidone to each milliliter of silver nitrate solution and stir fully to obtain a mixed solution;

[0050] Step 3. At room temperature, add a sodium bicarbonat...

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Abstract

The invention relates to a mesoporous silver carbonate nanorod visible light photocatalyst and its preparation method and belongs to the field of a photocatalytic material preparation technology. The preparation method comprises the following steps: firstly adding silver nitrate into deionized water, and uniformly stirring to obtain a silver nitrate solution; adding polyvinylpyrrolidone into the prepared silver nitrate solution and fully stirring to obtain a mixed solution; and dropwise adding a sodium bicarbonate solution into the mixed solution to obtain a gray suspension, carrying out centrifugal washing on the gray suspension, and drying at 50-70 DEG C to obtain the mesoporous silver carbonate nanorod visible light photocatalyst, wherein the total volume of the sodium bicarbonate solution equals to the volume of the mixed solution. The prepared mesoporous silver carbonate nanorods have advantages of uniform size, uniform dispersion, large specific surface area, multiple reaction active sites and high photocatalytic degradation activity to methylene blue in visible light.

Description

technical field [0001] The invention relates to a mesoporous silver carbonate nanorod visible light catalyst and a preparation method thereof, belonging to the technical field of photocatalytic material preparation. Background technique [0002] With the rapid development of industry, the problem of water pollution is becoming more and more serious, which poses a huge threat to the living environment of human beings. Photocatalysis, as an emerging energy-saving green environmental protection technology, has shown broad application prospects in the field of environmental pollution control. However, most of the current photocatalytic materials have excellent catalytic performance under ultraviolet light conditions, which greatly limits the photocatalytic technology. Therefore, the development of materials with excellent photocatalytic performance in the visible light band has become the focus of research in this field. Among many catalysts, silver carbonate, as a new type of ...

Claims

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Application Information

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IPC IPC(8): B01J27/232B01J20/02B01J20/28B01J20/30C01G5/00B82Y30/00B82Y40/00C02F1/30
Inventor 郭胜惠包建兴杨黎彭金辉
Owner KUNMING UNIV OF SCI & TECH
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