Method for preparing nano zinc oxide using shell powder as carrier

A technology of nano-zinc oxide and shell powder, which is applied in the field of nano-materials, can solve the problems of reducing the catalytic activity of ZnO, poor adhesion of titanium dioxide, and limiting wide application, etc., and achieves the effect of small air resistance, strong binding force and improved adsorption force

Inactive Publication Date: 2009-01-28
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the glass surface is flat and smooth, and its adhesion to titanium dioxide is poor, which limits its wide application.
Metal carriers are generally expensive, and metal ions such as Cu 2+ 、Cr 3+ Plasma will

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  • Method for preparing nano zinc oxide using shell powder as carrier

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] At room temperature, add 2g of zinc acetate to 100ml of distilled water, stir for 15min, take 10g of activated oyster shell powder carrier and soak in the solution, adjust the NaOH solution to pH=8, stir for 1h, let stand for 10h, pour off the clear liquid, Dry at 110°C, rinse with distilled water repeatedly to remove weakly bonded ZnO, dry at 70°C, and then bake at 400°C in a horse heart furnace, control the heating rate of 2K / min, after heating to 250°C, keep the temperature constant, Then the temperature is raised to 400° C., and the temperature is kept constant to obtain nano-ZnO immobilized by oyster shell powder, and finally the temperature is lowered to room temperature for use. Multiple impregnations can be performed to increase the loading capacity.

Embodiment 2

[0027] At room temperature, add 3 g of zinc phenolsulfonate to 100 ml of distilled water, stir for 20 min, take 10 g of activated oyster shell powder carrier and soak in the solution, adjust the NaOH solution to pH = 10, stir for 1 h, let stand for 10 h, pour off the clear water solution, dried at 100°C, rinsed repeatedly with distilled water to remove weakly bonded ZnO, dried at 70°C, and then roasted at 450°C in a horse-sand furnace, controlling the heating rate of 1K / min, and after heating to 250°C, Keep the temperature constant, then raise the temperature to 450°C, and then keep the temperature constant to obtain nano-ZnO immobilized by oyster shell powder, and finally cool down to room temperature for use. Multiple impregnations can be performed to increase the loading capacity.

Embodiment 3

[0029] At room temperature, add 3 g of zinc nitrate to 100 ml of distilled water, stir for 10 min, take 15 g of activated oyster shell powder carrier and soak in the solution, adjust the NaOH solution to pH=9, stir for 1 h, let it stand for 20 h, pour off the clear liquid, Dry at 120°C, wash with distilled water repeatedly to remove the weakly bonded ZnO, dry at 70°C, and then bake at 480°C in a horse heart furnace, control the heating rate of 5K / min, after heating to 250°C, keep the temperature constant, Then the temperature is raised to 480° C., and the temperature is kept constant to obtain nano-ZnO immobilized by oyster shell powder, and finally the temperature is lowered to room temperature for use. Multiple impregnations can be performed to increase the loading capacity.

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Abstract

The invention discloses a preparation method of nanometer zinc oxide which takes shell powder as a carrier, and in particular relates to a reproducible porous nanometer zinc oxide powder which takes the shell powder as the carrier and the preparation method thereof. In the preparation method, zinc oxide is loaded by impregnation on the shell powder carrier; firstly, zinc salt solution with appropriate concentration is prepared, and then an activated shell powder carrier is impregnated in the zinc salt solution by certain proportion, and then the obtained solution is stirred and stayed for a certain time, and treated by low temperature and abstersion pretreatment and finally roasted at high temperature, so the nanometer zinc oxide forms high-strength bond with the shell powder and promotes the catalytic activity of the nanometer zinc oxide at the same time. Impregnation can be conducted for a plurality of times to increase load. The nanometer ZnO is characterized by small particle size, good compatibility with materials, high catalytic efficiency, good stability, good regenerability, and the like, and can be applied to the fields of plastics, rubbers, fibers, coatings, home appliances, paints, ceramics, water and environment treatment, pharmaceutical and hygienic articles, etc. In terms of sources of raw materials and production technology, the preparation method not only reduces the production cost of nanometer ZnO catalyst but also is helpful for disposal of the increasingly serious environmental problems, thus bearing great environmental protection significance.

Description

Technical field: [0001] The invention relates to nano-zinc oxide and a preparation method thereof, in particular to a reproducible porous nano-zinc oxide powder with shell powder as a carrier and a preparation method thereof, which belongs to the technical field of nanometer materials. Background technique: [0002] With the overuse of resources and serious pollution of nature, the ecological environment has been severely damaged, and there is an urgent need to develop functionally conscious materials that can use energy economically and effectively without polluting the environment. The application of semiconductor heterogeneous photocatalytic reactions in sewage treatment has generally attracted people's attention in recent years. Among many semiconductor photocatalyst materials, TiO 2 It is favored because of its stable chemical properties, cheap and easy to obtain, non-toxic and high catalytic efficiency. However, TiO 2 It also has its own limitations. The band gap is...

Claims

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Application Information

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IPC IPC(8): B01J23/06B01J32/00B01J37/02
Inventor 李泳张兆霞宋文东
Owner GUANGDONG OCEAN UNIVERSITY
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