阅读说明：本技术 一种吸收紫外线的纳米氧化锌 (Ultraviolet-absorbing nano zinc oxide ) 是由 张训龙 刘艺 于 2019-09-25 设计创作，主要内容包括：本发明公开了一种吸收紫外线的纳米氧化锌,包含大于99重量%的锌部分、第一金属元素掺杂物部分和第二金属元素掺杂物部分；所述第一金属掺杂物部分和所述第二金属掺杂物部分以0.5-1:1-1.5重量比存在；所述第一金属掺杂物在氧化锌六角纤锌结构中以金属离子2+的形式存在；所述第二金属掺杂物在氧化锌六角纤锌结构中以金属离子2+、3+的形式存在或同时存在。本发明的吸收紫外线的纳米氧化锌掺杂多于氧化锌自身的电子,在当受到紫外线的照射时,价带上的电子可吸收紫外线而被激发到导带上,同时产生空穴一电子吸收并散射紫外线辐射。(The invention discloses a nano zinc oxide capable of absorbing ultraviolet rays, which comprises a zinc part, a first metal element dopant part and a second metal element dopant part, wherein the zinc part is more than 99 weight percent; the first metal dopant portion and the second metal dopant portion are present in a weight ratio of 0.5-1: 1-1.5; the first metal dopant exists in a zinc oxide hexagonal fiber zinc structure in a metal ion 2+ form; the second metal dopant exists in the form of metal ions 2+ and 3+ or exists simultaneously in the zinc oxide hexagonal fiber zinc structure. The nanometer zinc oxide capable of absorbing ultraviolet ray has more electrons than zinc oxide, and when the nanometer zinc oxide is irradiated by ultraviolet ray, the electrons in the valence band may absorb ultraviolet ray to excite the conduction band and produce holes and electrons to absorb and scatter ultraviolet ray.)

1. A nanometer zinc oxide for absorbing ultraviolet rays is characterized in that: comprising greater than 99 wt% of a zinc portion, a first metallic element dopant portion, and a second metallic element dopant portion;

the first metal dopant portion and the second metal dopant portion are present in a weight ratio of 0.5-1: 1-1.5;

the first metal dopant exists in a zinc oxide hexagonal fiber zinc structure in a metal ion 2+ form;

the second metal dopant exists in the form of metal ions 2+ and 3+ in the zinc oxide hexagonal fiber zinc structure or simultaneously;

preparing zinc oxide containing dopant by using dehydrated zinc acetate and chloride through a sol-gel method;

mixing zinc oxide prepared by a sol-gel method with water to prepare a nano zinc oxide aqueous suspension with the mass concentration of 5.8%, ultrasonically dispersing for 4 ~ 6 minutes, adding aluminum potassium sulfate with the mass of 1.8% of the nano zinc oxide, adding the nano zinc oxide aqueous suspension into a high-speed stirrer, stirring for 1 hour at the rotating speed of 3200r/min, simultaneously dropwise adding a sodium hydroxide solution within 2 ~ 3 minutes, transferring the solution into a reaction kettle lined with polytetrafluoroethylene, placing the reaction kettle into a homogeneous reactor, reacting for 6 ~ 8 hours at the temperature of 100 ~ 120 ℃, cooling to room temperature after the reaction is finished, centrifugally separating, washing, and drying to finally obtain the nano zinc oxide.

2. The ultraviolet-absorbing nano zinc oxide according to claim 1, wherein: the first metal dopant is one or two of manganese, cobalt, magnesium and barium.

3. The ultraviolet-absorbing nano zinc oxide according to claim 1, wherein: the second metal dopant is formed by mixing any two of iron, aluminum and cerium.

4. The ultraviolet-absorbing nano zinc oxide according to claim 1, wherein: the first metal dopant is manganese; the second metal dopant is iron and aluminum.

5. The ultraviolet-absorbing nano zinc oxide according to claim 1, wherein: the first metal dopant is magnesium; the second metal dopant is iron and cerium.

6. The ultraviolet-absorbing nano zinc oxide according to claim 1, wherein: the first metal dopant is cobalt element; the second metal dopant is aluminum and cerium.

Technical Field

The invention relates to a nano zinc oxide capable of absorbing ultraviolet rays.

Background

Skin cancer is a significant public health problem, accounting for 50% of cancer diagnosis cases in the united states. Ultraviolet radiation (UV) can cause damage at the molecular and cellular level and is considered to be a major environmental factor leading to skin cancer. Prolonged exposure to UV radiation, such as from the sun, can lead to the formation of photodermopathy and erythema, as well as increasing the risk of skin cancer such as melanoma, and accelerating the skin aging process, such as skin loss of elasticity and wrinkling.

Zinc oxide is useful as a particulate material for sunscreens because it absorbs and scatters ultraviolet radiation, and the present invention is directed to the preparation of a nano zinc oxide with enhanced absorption of ultraviolet radiation.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a nano zinc oxide that absorbs ultraviolet rays.

In order to achieve the purpose, the invention is realized by the following technical scheme: an ultraviolet absorbing nano zinc oxide comprising greater than 99 wt% of a zinc portion, a first metallic element dopant portion, and a second metallic element dopant portion;

the first metal dopant portion and the second metal dopant portion are present in a weight ratio of 0.5-1: 1-1.5;

the first metal dopant exists in a zinc oxide hexagonal fiber zinc structure in a metal ion 2+ form;

the second metal dopant exists in the form of metal ions 2+ and 3+ in the zinc oxide hexagonal fiber zinc structure or simultaneously;

preparing zinc oxide containing dopant by using dehydrated zinc acetate and chloride through a sol-gel method;

mixing zinc oxide prepared by a sol-gel method with water to prepare a nano zinc oxide aqueous suspension with the mass concentration of 5.8%, ultrasonically dispersing for 4 ~ 6 minutes, adding aluminum potassium sulfate with the mass of 1.8% of the nano zinc oxide, adding the nano zinc oxide aqueous suspension into a high-speed stirrer, stirring for 1 hour at the rotating speed of 3200r/min, simultaneously dropwise adding a sodium hydroxide solution within 2 ~ 3 minutes, transferring the solution into a reaction kettle lined with polytetrafluoroethylene, placing the reaction kettle into a homogeneous reactor, reacting for 6 ~ 8 hours at the temperature of 100 ~ 120 ℃, cooling to room temperature after the reaction is finished, centrifugally separating, washing, and drying to finally obtain the nano zinc oxide.

Further, the first metal dopant is one or two of manganese, cobalt, magnesium and barium.

Furthermore, the second metal dopant is formed by mixing any two of iron, aluminum and cerium.

In particular, the first metal dopant is manganese; the second metal dopant is iron and aluminum; the first metal dopant is magnesium; the second metal dopant is iron and cerium; the first metal dopant is cobalt element; the second metal dopant is aluminum and cerium.

The invention has the beneficial effects that: the nano zinc oxide capable of absorbing ultraviolet rays of the invention is doped with more electrons than zinc oxide, when the nano zinc oxide is irradiated by ultraviolet rays, electrons on a valence band can absorb the ultraviolet rays and are excited to a conduction band, and holes and electrons are generated to absorb and scatter the ultraviolet radiation, and the invention has the following excellent effects: by utilizing the compensation of iron ions, aluminum ions and cerium ions 3+, the electron production quantity is increased during the irradiation of ultraviolet rays, so that the absorption of the ultraviolet rays is enhanced.

Detailed Description