ZnO superfine nano-particles, ZnO slurry, preparation method and application

A technology of ultra-fine nanoparticles and particles, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., and can solve the problems of prolonging battery energy repayment time, photoanode polycrystalline boundary, unfavorable electron transport, etc. , to achieve the effect of eliminating surface impurity defects, improving semiconductor characteristics, and cheap and easy-to-obtain raw materials

Inactive Publication Date: 2019-06-18
DONGGUAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many grain boundaries inside the photoanode prepared by this method, which is not conducive to electron transport.
In addition, in order to obtain a photoanode with a certain pore structure, it is often necessary to add a polymer pore-forming agent during the preparation, and finally remove it by high-temperature sintering. This process undoubtedly increases energy consumption, prolongs the energy recovery time of the battery, and cannot Fabrication on flexible plastic substrates
[0005] Therefore, it can be seen from the above analysis that there are still some challenges in the preparation of high-performance ZnO photoanodes at low temperature.

Method used

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  • ZnO superfine nano-particles, ZnO slurry, preparation method and application
  • ZnO superfine nano-particles, ZnO slurry, preparation method and application
  • ZnO superfine nano-particles, ZnO slurry, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Weigh 10g of sodium hydroxide and 20g of zinc nitrate hexahydrate, add them to an agate mortar and mix, grind for 20min to obtain a white paste; transfer the paste to a 50ml centrifuge tube, add 40ml of deionized water, shake After uniformity, let it stand for 3 hours; then add 10ml of deionized water and mix well, then age at room temperature (25°C) for 20 hours; add 40ml of deionized water to the aged sample, and wash the precipitate under the condition of ultrasonic vibration and vortex vibration, The frequency of ultrasonic oscillation is 35kHz, and the time is 5min. The frequency of vortex oscillation is 20Hz, and the time is 5min; then the precipitate is centrifuged at 3000rpm, and the time is 5min; the obtained white precipitate is ZnO ultrafine nanoparticles.

[0044] Add the obtained white precipitate to 20ml of deionized water, mix and disperse under the condition of ultrasonic vibration and vortex vibration, repeat the dispersion 4 times in total, the frequenc...

Embodiment 2

[0047] Weigh 10g of sodium hydroxide and 20g of zinc nitrate hexahydrate, add them to an agate mortar and mix, grind for 20min to obtain a white paste; transfer the paste to a 50ml centrifuge tube, add 40ml of deionized water, shake Let stand for 3 hours after uniformity; then add 10ml of deionized water and mix well, then age at 50°C for 20 hours; add 40ml of deionized water to the aged sample, wash the precipitate under the conditions of ultrasonic vibration and vortex vibration, and ultrasonic vibration The frequency is 35kHz, the time is 5min, the frequency of vortex oscillation is 20Hz, and the time is 5min; then the precipitate is centrifuged at 3000rpm, and the time is 5min; the obtained white precipitate is ZnO ultrafine nanoparticles.

[0048] Add the obtained white precipitate to 20ml of deionized water, mix and disperse under the condition of ultrasonic vibration and vortex vibration, repeat the dispersion 4 times in total, the frequency of each ultrasonic vibration ...

Embodiment 3

[0052] Weigh 10g of sodium hydroxide and 20g of zinc nitrate hexahydrate, add them to an agate mortar and mix, grind for 20min to obtain a white paste; transfer the paste to a 50ml centrifuge tube, add 40ml of deionized water, shake Let stand for 3 hours after uniformity; then add 10ml of deionized water and mix well, then age at 90°C for 20 hours; add 40ml of deionized water to the aged sample, wash the precipitate under the conditions of ultrasonic vibration and vortex vibration, and ultrasonic vibration The frequency is 35kHz, the time is 5min, the frequency of vortex oscillation is 20Hz, and the time is 5min; then the precipitate is centrifuged at 3000rpm, and the time is 5min; the obtained white precipitate is ZnO ultrafine nanoparticles.

[0053] Add the obtained white precipitate to 20ml of deionized water, mix and disperse under the condition of ultrasonic vibration and vortex vibration, repeat the dispersion 4 times in total, the frequency of each ultrasonic vibration ...

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Abstract

The invention discloses a ZnO superfine nano particle, a ZnO slurry, a preparation method and application thereof. Hydroxide powder and zinc salt solid are mixed and ground, water is added, the mixture is aged, the aged precipitate is washed under the condition of vibration and is centrifuged, and the precipitate is the ZnO superfine nano particle. The ZnO superfine nano particles and the deionized water are uniformly mixed and dispersed to obtain the ZnO slurry. The preparation method of the ZnO superfine nano-particles is simple, environment-friendly, efficient and low in cost, and can effectively promote the recrystallization of the ZnO through a simple low-temperature aging process (not more than 90 DEG C), which is beneficial to eliminate surface impurity defects, and plays a significant role in improving the semiconductor characteristics of materials.

Description

technical field [0001] The invention belongs to the field of new materials and new energy devices, and in particular relates to a ZnO ultrafine nano particle, a ZnO slurry and a preparation method and application thereof. Background technique [0002] The development and utilization of renewable new energy is an important way to alleviate the world's energy tension and realize the sustainable development of human society. Among various renewable new energy sources, solar energy is considered to be one of the most promising new energy sources due to its advantages such as huge energy, cleanness, and wide distribution. By converting sunlight directly into electrical energy, solar cells are an important way to utilize solar energy. Photovoltaic power generation will become an important part of electricity supply in the future. As a representative third-generation solar cell, dye-sensitized solar cells (Dye-Sensitized Solar cells, referred to as DSCs) present an organic-inorga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/08H01B1/14H01G9/20C01G9/02B82Y30/00B82Y40/00
Inventor 史彦涛李燕茜
Owner DONGGUAN UNIV OF TECH
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