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Method for preparing nano zinc oxide in monodisperse, with no agglomeration and strong ultraviolet absorption

A nano-zinc oxide and external absorption technology, which is applied in the direction of zinc oxide/zinc hydroxide, etc., can solve the problems of easy agglomeration and uneven particle size of nano-zinc oxide, and achieve uniform particle size distribution, cheap reaction raw materials, and low reaction temperature Effect

Inactive Publication Date: 2005-01-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the solution method currently used to prepare nano-zinc oxide has the disadvantages of uneven particle size and easy agglomeration, and these shortcomings have a great impact on the optical and electrical properties of nano-zinc oxide, so it is difficult to meet the needs of scientific research and the market.

Method used

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  • Method for preparing nano zinc oxide in monodisperse, with no agglomeration and strong ultraviolet absorption
  • Method for preparing nano zinc oxide in monodisperse, with no agglomeration and strong ultraviolet absorption
  • Method for preparing nano zinc oxide in monodisperse, with no agglomeration and strong ultraviolet absorption

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Effect test

Embodiment 1

[0023] ①Preparation of reaction solution: Dissolve 0.0005mol of zinc nitrate and 0.00075mol of hexamethylenetetraammonia in 100ml of methanol solution, then add 0.5g of PVP, stir until the solution is clear, and then prepare a reaction solution.

[0024] ②Synthesis of nano-zinc oxide: Pour the above-mentioned growth reaction solution of zinc oxide nanocrystals into a tetrafluoroethylene reactor, seal it, heat up to 100°C, and react for 3 hours. After the reaction, naturally cool to room temperature and take out the sample Centrifugal separation, natural drying after repeated washing can obtain nano-zinc oxide crystals.

[0025] The X-ray diffraction spectrogram of obtained zinc oxide thin film is as follows figure 1 ,Depend on figure 1 It can be seen that the prepared zinc oxide is hexagonal (36-1451). The particle size of zinc oxide crystals calculated according to the Scherrer formula is 15 nm. Transmission electron microscope pictures as figure 2 a, b, It can be seen f...

Embodiment 2

[0027] ①Preparation of reaction solution: Dissolve 0.0005mol of zinc nitrate and 0.00075mol of hexamethylenetetraammonia in 100ml of methanol solution, then add 0.5g of PVP, stir until the solution is clear, and then prepare a reaction solution.

[0028] ② Synthesis of nano-zinc oxide: Pour the growth reaction solution of zinc oxide nanocrystals prepared above into a tetrafluoroethylene reactor, seal it, heat up to 98°C, and react for 3.5 hours. After the reaction, naturally cool to room temperature and take out the sample Centrifugal separation, natural drying after repeated washing can obtain nano-zinc oxide crystals.

Embodiment 3

[0030] ①Preparation of reaction solution: Dissolve 0.0005mol of zinc nitrate and 0.00075mol of hexamethylenetetraammonia in 100ml of methanol solution, then add 0.5g of PVP, stir until the solution is clear, and then prepare a reaction solution.

[0031] ②Synthesis of nano-zinc oxide: Pour the above-prepared growth reaction solution of zinc oxide nanocrystals into a tetrafluoroethylene reactor, seal it, heat up to 97°C, and react for 4 hours. After the reaction, naturally cool to room temperature and take out the sample Centrifugal separation, natural drying after repeated washing can obtain nano-zinc oxide crystals.

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Abstract

At first, mixing zinc salt hexahydrated zinc nitrate and ammonia source hexamethylene tetramine according to mole density ratio 1:1.5 and dissolving them in carbinol solutio, then adding polytene pyrrolidone in certainly ratio, stirring till that solution is clear to produce grow reaction liquid of zinc oxide nanometre crystal, putting said reaction liquid into tetrafluoroethylene reactor, closing and increasing temp. to 95-100 deg.C to do reaction, then natural cooling, centrifuging washing, airing to obtain zinc oxide crystal that particle size is 15 nm.

Description

technical field [0001] The invention relates to a method for preparing monodisperse, non-agglomerated and strong ultraviolet-absorbing nano-zinc oxide, in particular to the preparation of monodisperse, non-agglomerating, and strong ultraviolet-absorbing zinc oxide nanocrystals by a chemical solution method, which belongs to the category of inorganic nanomaterials Preparation technology field. Background technique [0002] Nano-zinc oxide is a good semiconductor material. It has good properties such as light emission, photoelectric conversion, and ultraviolet absorption due to its large energy gap width (similar to gallium nitride), and is widely used in light-emitting materials and photoelectric conversion materials. , rubber, ceramics, coatings, and daily chemical materials can be used to manufacture gas-sensitive materials, light-emitting electrodes, rubber additives, gas sensors, ultraviolet shielding materials, transformers, and various optical devices. In 2001, the aut...

Claims

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Application Information

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IPC IPC(8): C01G9/02
Inventor 王卓钱雪峰朱子康印杰
Owner SHANGHAI JIAO TONG UNIV
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