Method for preparing nano-zinc oxide used as photocatalyst

A nano-zinc oxide, photocatalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as unfavorable production safety and environmental protection, irritating environment, corrosiveness, etc. Achieve the effect of alleviating the dehydration collapse effect, ensuring safety and environmental protection, and high crystallinity

Inactive Publication Date: 2015-01-28
SOUTHWEST UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ammonium persulfate will also pollute the environment due to its combustion-supporting, corrosive and irritating characteristics, so this method is not conducive to production safety and environmental protection

Method used

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  • Method for preparing nano-zinc oxide used as photocatalyst
  • Method for preparing nano-zinc oxide used as photocatalyst
  • Method for preparing nano-zinc oxide used as photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] At indoor natural temperature (the inventor once prepared nano-ZnO in different seasons: summer, autumn and winter, and indoor temperature has no effect on the experimental results), stirring will mix 0.0171mol of zinc nitrate (5.022g), 0.0257mol of tartaric acid, 0.1112 1 mol of glucose was dissolved in 51 mL of deionized water to form a solution, and then 0.1265 mol of acrylamide and 0.0256 mol of methylenebisacrylamide were added in sequence, and stirred evenly to obtain a colorless transparent sol. The obtained colorless transparent sol was heated in a water bath at 90°C for 1 hour to obtain a white wet gel. The wet gel was placed in a blower constant temperature drying oven and dried at 120°C for 22 hours to obtain a xerogel. The xerogel was ground into After the powder is sintered at 600°C for 5 hours, nano-zinc oxide powder is obtained;

[0021] The molar ratio of tartaric acid to zinc nitrate is 1.50:1, the molar ratio of glucose to zinc nitrate is 6.5:1, the mo...

Embodiment 2

[0024] Dissolve 0.0171 mol of zinc nitrate (5.022 g), 0.0257 mol of citric acid, and 0.1112 glucose in 60 mL of deionized water under stirring at room temperature to form a solution, and then add 0.1282 mol of acrylamide and 0.0239 mol of methylenebisacrylamide in sequence , and stirred evenly to obtain a colorless transparent sol. Heat the obtained colorless transparent sol in a water bath at 86°C for 2 hours to obtain a white wet gel, place the wet gel in a blower constant temperature drying oven, and dry it at 100°C for 24 hours to obtain a dry gel, grind the dry gel After being powdered, it is sintered at 700°C for 4 hours to obtain nano-zinc oxide powder;

[0025] The molar ratio of citric acid to zinc nitrate is 1.5:1, the molar ratio of glucose to zinc nitrate is 6.5:1, the molar ratio of acrylamide to zinc nitrate is 7.5:1, and the methylene bis The molar ratio of acrylamide to zinc nitrate is 1.4:1, and the ratio of the volume of deionized water to the mass of zinc n...

Embodiment 3

[0028] Dissolve 0.0171 mol of zinc nitrate (5.022 g), 0.0128 mol of tartaric acid, and 0.1112 glucose in 51 mL of deionized water under stirring at room temperature to form a solution, then add 0.1299 mol of acrylamide, 0.0128 mol of methylenebisacrylamide and Stir evenly to obtain a colorless transparent sol. Heat the obtained colorless transparent sol in a water bath at 88°C for 1.5 hours to obtain a white wet gel, place the wet gel in a blower constant temperature drying oven, and dry it at 100°C for 24 hours to obtain a dry gel, grind the dry gel After being powdered, sinter at 650°C for 5 hours to obtain nano-zinc oxide powder;

[0029] The molar ratio of tartaric acid to zinc nitrate is 0.75:1, the molar ratio of glucose to zinc nitrate is 6.5:1, the molar ratio of acrylamide to zinc nitrate is 7.6:1, and the methylenebisacrylic acid The molar ratio of amide to zinc nitrate is 1.5:1, and the ratio of the volume of deionized water to the mass of zinc nitrate is 10.20:1 (...

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Abstract

A method for preparing nano-zinc oxide used as a photocatalyst comprises the following steps: dissolving zinc nitrate, a complexing agent and glucose in deionized water at room temperature under stirring so as to form a solution; adding acrylamide and methylene-bisacrylamide into the solution in sequence; uniformly stirring the solution to obtain colorless and transparent sol; heating the obtained colorless and transparent sol in a water bath to form white wet gel; drying the obtained wet gel to obtain dry gel; grinding the dry gel to powder; sintering the powder for 4-5 hours at 600-700 DEG C so as to obtain nano-zinc oxide powder. The nano-zinc oxide prepared by using the method provided by the invention has the advantages of very high degree of crystallinity, uniform distribution of grain size and very good photocatalytic degradation activity for various organic dyes under the ultraviolet light.

Description

technical field [0001] The invention belongs to the technical field of preparation of photocatalyst zinc oxide, and in particular relates to a method for preparing nanometer zinc oxide by using a sol-gel method. Background technique [0002] The liquid phase method is a common method for preparing nano zinc oxide, and the liquid phase method is mainly divided into hydrothermal method, sol-gel method, and microemulsion method. The nano-zinc oxide particles prepared by the hydrothermal method have perfect crystallization, and the process is relatively simple, without high-temperature roasting, but the particle size is large, the distribution is wide, easy to agglomerate, and it is easy to introduce impurities, and because the reaction requires high temperature and pressure , so the requirements for equipment are harsh, and the production cycle is long. The particle size of zinc oxide obtained by the microemulsion method is small and difficult to control, with many impurities,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B01J35/02B01J37/00
Inventor 徐明鹿轶红张琴章春来
Owner SOUTHWEST UNIVERSITY FOR NATIONALITIES
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