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A high-performance photocatalytic nanomaterial

A nanomaterial, photocatalytic technology, applied in the field of photocatalysis, to achieve the effect of high hydrogen production efficiency, excellent stability and good photocatalytic activity

Inactive Publication Date: 2020-07-03
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nanoscale ZnO / ZnS heterojunction has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of high-performance photocatalytic nano material, its preparation method is as follows:

[0032] Step 1, adding zinc acetate to absolute ethanol, then adding thioacetamide, stirring evenly to form a mixed alcohol solution;

[0033] Step 2: Pour concentrated ammonia water into the mixed alcohol solution, seal and ultrasonicate for 20 minutes, then reflux for 4 hours, and obtain a mixed suspension after cooling down;

[0034] Step 3, adding polyvinylpyrrolidone to the mixed suspension, ultrasonically reacting for 2 hours, and evaporating to dryness to obtain a mixed precipitate;

[0035] Step 4, adding the mixed precipitate to a high-temperature reactor for infrared heating for 2 hours to obtain a polyvinylpyrrolidone / zinc oxide / zinc sulfide precipitation mixture;

[0036] Step 5: Add the polyvinylpyrrolidone / zinc oxide / zinc sulfide precipitation mixture into the methanol solution and stir evenly, then electrolyze for 2 hours, and filter and wash to obtain zinc su...

Embodiment 2

[0047] A kind of high-performance photocatalytic nano material, its preparation method is as follows:

[0048] Step 1, adding zinc acetate to absolute ethanol, then adding thioacetamide, stirring evenly to form a mixed alcohol solution;

[0049] Step 2, pouring concentrated ammonia water into the mixed alcohol solution, sealing and ultrasonicating for 40 minutes, then reflux reaction for 8 hours, and obtaining a mixed suspension after cooling down;

[0050] Step 3, adding polyvinylpyrrolidone to the mixed suspension, ultrasonically reacting for 4 hours, and evaporating to dryness to obtain a mixed precipitate;

[0051] Step 4, adding the mixed precipitate to a high-temperature reactor for infrared heating for 4 hours to obtain a polyvinylpyrrolidone / zinc oxide / zinc sulfide precipitation mixture;

[0052] Step 5: Add the polyvinylpyrrolidone / zinc oxide / zinc sulfide precipitation mixture into the methanol solution and stir evenly, then electrolyze for 5 hours, filter and wash a...

Embodiment 3

[0063] A kind of high-performance photocatalytic nano material, its preparation method is as follows:

[0064] Step 1, adding zinc acetate to absolute ethanol, then adding thioacetamide, stirring evenly to form a mixed alcohol solution;

[0065] Step 2: Pour concentrated ammonia water into the mixed alcohol solution, seal and sonicate for 30 minutes, then reflux for 6 hours, and obtain a mixed suspension after cooling down;

[0066] Step 3, adding polyvinylpyrrolidone to the mixed suspension, ultrasonically reacting for 3 hours, and evaporating to dryness to obtain a mixed precipitate;

[0067] Step 4, adding the mixed precipitate to a high-temperature reactor for infrared heating for 3 hours to obtain a polyvinylpyrrolidone / zinc oxide / zinc sulfide precipitation mixture;

[0068] Step 5: Add the polyvinylpyrrolidone / zinc oxide / zinc sulfide precipitation mixture into the methanol solution and stir evenly, then electrolyze for 4 hours, and filter and wash to obtain zinc sulfide...

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Abstract

The invention discloses a high-performance photocatalytic nanomaterial. Step 1, adding zinc acetate into absolute ethanol, then adding thioacetamide, stirring evenly to form a mixed alcohol liquid; step 2, passing concentrated ammonia water into In the mixed alcohol solution, seal and sonicate for 20-40min, then reflux for 4-8h, and obtain a mixed suspension after cooling down; step 3, add polyvinylpyrrolidone to the mixed suspension, ultrasonically react for 2-4h, and evaporate to dryness to obtain Mix the precipitate; Step 4, add the mixed precipitate to the high-temperature reactor and heat it with infrared for 2-4 hours to obtain a polyvinylpyrrolidone / zinc oxide / zinc sulfide precipitation mixture; Step 5, precipitate the polyvinylpyrrolidone / zinc oxide / zinc sulfide precipitation mixture The mixture was added to the methanol solution, stirred evenly, and then electrolyzed for 2-5 hours. After the reaction was completed, it was filtered and washed to obtain zinc sulfide / zinc oxide. The present invention uses co-precipitation as the precipitation method and electrolysis reaction as the activation reaction, and the photocatalyst can reach the nanometer level and can be synthesized on a large scale.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a high-performance photocatalytic nanometer material. Background technique [0002] In recent decades, with the increasingly serious energy crisis and environmental pollution facing the world, hydrogen energy has attracted widespread attention as a clean, renewable, and high-combustion secondary energy source, also known as "the future energy source". oil". Unlike oil or coal combustion produces SO 2 , CO 2 And other toxic substances, the products of hydrogen combustion are environmentally friendly water and heat. In addition, compared with the current fuels (petroleum, methane, coal, etc.), hydrogen can contain greater energy (119KJ / g) at the same mass, which is three times that of gasoline, and hydrogen can be easily stored and transported , to meet the needs of various environments. Therefore, hydrogen energy will be an extremely ideal energy source. F...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/06
CPCC25B1/04C25B11/04C25B1/55Y02E60/36
Inventor 杨建辉
Owner NORTHWEST UNIV
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