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Preparation method of nano zinc oxide and nano zinc oxide

A nano-zinc oxide and zinc salt technology, applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of complex preparation process, long time-consuming, uncontrollable particle size of nano-zinc oxide, etc.

Active Publication Date: 2021-05-11
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of nano-zinc oxide and the nano-zinc oxide prepared by the method, so as to at least solve the complex preparation process of nano-zinc oxide in the prior art, take a long time, and the particle size of nano-zinc oxide is not enough. Control and other issues

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  • Preparation method of nano zinc oxide and nano zinc oxide
  • Preparation method of nano zinc oxide and nano zinc oxide

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preparation example Construction

[0029] The embodiment of the present invention provides a kind of preparation method of nanometer zinc oxide, comprises the following steps:

[0030] (1) Zinc salt reaction solution and alkali source reaction solution are passed into respectively from the reaction solution inlet on both sides of the V-type microchannel reactor with a certain flow rate, so that it collides and mixes at the bottom of the V-type microchannel reactor, Obtain a suspension;

[0031]Wherein, the zinc salt includes one or more of zinc sulfate, zinc chloride, and zinc nitrate; the alkali source includes one of ammonium bicarbonate, sodium hydroxide, potassium hydroxide, sodium carbonate, and ammonium carbonate or more; preferably, the zinc salt reaction solution is a zinc sulfate aqueous solution with a concentration of 10-150g / L, and the alkali source reaction solution is an aqueous ammonium bicarbonate solution with a concentration of 11-165g / L; the flow rate is 0.1-1m / s; such as figure 1 As shown,...

Embodiment 1

[0039] In this embodiment, a V-shaped microchannel reactor made of polytetrafluoroethylene is used to prepare nano-zinc oxide, wherein the channel inner diameter of the V-shaped microchannel reactor is 0.4mm, and the angle between the two reaction solution inlet channels 2 and the outlet channel 3 Be respectively 10 °; The preparation method of the nano zinc oxide of the present embodiment comprises:

[0040] 1) preparation concentration is the zinc sulfate aqueous solution of 150g / L, the ammonium bicarbonate aqueous solution that concentration is 165g / L respectively as zinc salt reaction solution and alkali source reaction solution;

[0041] 2) The zinc salt reaction solution and the alkali source reaction solution are continuously introduced from the reaction solution inlets on both sides of the V-shaped microchannel reactor with a flow velocity of 0.8m / s, so that they collide and collide at the bottom of the V-type microchannel reactor. Mix to obtain a suspension;

[0042]...

Embodiment 2

[0045] In this embodiment, a stainless steel V-shaped microchannel reactor is used to prepare nano-zinc oxide, wherein the channel inner diameter of the V-shaped microchannel reactor is 4 mm, and the angles between the two reaction liquid inlet channels 2 and the outlet channels 3 are 90° respectively. The preparation method of the nano zinc oxide of the present embodiment comprises:

[0046] 1) preparation concentration is the zinc sulfate aqueous solution of 10g / L, the ammonium bicarbonate aqueous solution that concentration is 11g / L respectively as zinc salt reaction solution and alkali source reaction solution;

[0047] 2) The zinc salt reaction solution and the alkali source reaction solution are continuously introduced from the reaction solution inlets on both sides of the V-type microchannel reactor at a flow rate of 0.1m / s, so that they collide and collide at the bottom of the V-type microchannel reactor. Mix to obtain a suspension;

[0048] 3) Filtrating the suspensi...

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Abstract

The invention provides a preparation method of nano-zinc oxide and nano-zinc oxide prepared by the method, and the preparation method of nano-zinc oxide comprises the following steps: (1) respectively introducing a zinc salt reaction solution and an alkali source reaction solution from reaction solution inlets at two sides of a V-shaped microchannel reactor at a certain flow rate, colliding and mixing at the bottom of the V-shaped microchannel reactor to obtain turbid liquid; and (2) filtering the turbid liquid, removing impurities, drying, calcining and crushing to obtain the nano zinc oxide particles. A V-shaped microchannel reactor is adopted to prepare nano zinc oxide, high-speed collision of reaction liquid in a micro-scale limited space in the V-shaped microchannel reactor is utilized to improve the mixing performance of the reaction liquid, rapid consumption of reaction raw materials is effectively promoted, and then explosive nucleation of a zinc oxide precursor is promoted; and the quality of a final zinc oxide product is controlled by controlling the size of the precursor, and controllable preparation of small-size nano zinc oxide particles with the particle size of 5-20 nm is achieved.

Description

technical field [0001] The invention relates to the field of inorganic nanometer materials, in particular to a preparation method of nanometer zinc oxide and nanometer zinc oxide prepared by the method. Background technique [0002] As an important multifunctional material, nano-zinc oxide has unique piezoelectricity, fluorescence, and the ability to absorb and scatter ultraviolet rays, and plays an important role in the fields of catalysis, biomedicine, and optoelectronic devices. In particular, the small-sized nano-zinc oxide with a particle size of 1-20nm has become an important additive in sunscreen and shading film materials because it can effectively shield UVB (medium-wave erythema effect ultraviolet light, wavelength 275-320nm) rays. [0003] At present, the commonly used methods for synthesizing nano-zinc oxide mainly include solid-phase method, gas-phase method and liquid-phase method. Compared with solid-phase and gas-phase methods, liquid-phase methods have the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82Y30/00
CPCC01G9/02B82Y30/00C01P2004/04C01P2004/64Y02W10/37
Inventor 杜乐杨映天牛文豪范娇娇朱吉钦
Owner BEIJING UNIV OF CHEM TECH
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