A kind of multi-layer composite functional material and its preparation method and application

Abstract

The invention discloses a multi-layer composite functional material. The functional material is a substrate layer, a solar reflection layer, a photocatalytic layer, a biocoupling purification layer and a self-cleaning protective layer from bottom to top; the solar reflection layer consists of prepared from mica-modified silica sol; the photocatalytic layer is made from a photocatalytic nanogel of rare earth co-doped graphene; the biocoupling purification layer contains trace element bioactivation factors; the self-cleaning protective layer contains B base cellulose. The invention solves the problems that traditional photocatalytic materials currently lack, such as insufficient efficiency, insufficient lifespan, non-pollution resistance, and high light requirements (cannot be used normally day and night, and is difficult to apply in relatively shading places), so as to be suitable for complex water purification such as water systems. practical engineering needs.

Description

technical field

[0001] The invention relates to the field of environmental purification, in particular to a novel environmental functional material of composite multi-layer structure photocatalysis coupled biological purification for water or soil purification. Background technique

[0002] Nano-titania photocatalytic oxidation is an emerging water pollution control technology. It can effectively treat organic matter in water and kill harmful microorganisms in water. Due to the characteristics of this technology, it can use sunlight, has fast degradation speed, mild oxidation conditions, no secondary pollution, wide application range and high chemical activity of titanium dioxide, which is safe It is non-toxic and inexpensive, so it is also called green water treatment technology.

[0003] Photocatalytic degradation of environmental pollutants is still a technology that needs to be continuously improved and developed. 2 In terms of modification treatment, measures such as ...

Examples

Embodiment 1

[0041] A multi-layer composite functional material, the functional material is, from bottom to top, a base material layer, a solar reflection layer, a photocatalytic layer, a biological coupling purification layer and a self-cleaning protective layer;

[0042] The solar reflection layer is made of mica-modified silica sol;

[0043] The photocatalytic layer is prepared from a photocatalytic nanogel of rare earth co-doped graphene;

[0044] The biological coupling purification layer contains trace element biological activation factors;

[0045] The self-cleaning protective layer contains ethyl cellulose;

[0046] The preparation method of the functional material comprises the following steps:

[0047] (1) prepare mica-modified silica sol;

[0048] 5kg of mica crystals were added to 160L of nano-silica ethanol dispersion liquid (the mass concentration of nano-silica was 5%), followed by high-speed stirring and ultrasonic dispersion to obtain mica-modified silica sol.

[0049] (...

Embodiment 2

[0067] The difference from Example 1 is that the prepared rare earth element co-doped graphene photocatalytic nanogel is coated on the non-woven substrate supported by the previous slurry, and the coating times are 2 times.

Embodiment 3

[0069] The difference from Example 1 is that 0.4 g of graphene is added to the gel D, and the rare earth element co-doped graphene photocatalytic nanogel is obtained by ultrasonic treatment.

technical field

[0001] The invention relates to the field of environmental purification, in particular to a novel environmental functional material of composite multi-layer structure photocatalysis coupled biological purification for water or soil purification. Background technique

[0002] Nano-titania photocatalytic oxidation is an emerging water pollution control technology. It can effectively treat organic matter in water and kill harmful microorganisms in water. Due to the characteristics of this technology, it can use sunlight, has fast degradation speed, mild oxidation conditions, no secondary pollution, wide application range and high chemical activity of titanium dioxide, which is safe It is non-toxic and inexpensive, so it is also called green water treatment technology.

[0003] Photocatalytic degradation of environmental pollutants is still a technology that needs to be continuously improved and developed. 2 In terms of modification treatment, measures such as ...

Examples

Embodiment 1

[0041] A multi-layer composite functional material, the functional material is, from bottom to top, a base material layer, a solar reflection layer, a photocatalytic layer, a biological coupling purification layer and a self-cleaning protective layer;

[0042] The solar reflection layer is made of mica-modified silica sol;

[0043] The photocatalytic layer is prepared from a photocatalytic nanogel of rare earth co-doped graphene;

[0044] The biological coupling purification layer contains trace element biological activation factors;

[0045] The self-cleaning protective layer contains ethyl cellulose;

[0046] The preparation method of the functional material comprises the following steps:

[0047] (1) prepare mica-modified silica sol;

[0048] 5kg of mica crystals were added to 160L of nano-silica ethanol dispersion liquid (the mass concentration of nano-silica was 5%), followed by high-speed stirring and ultrasonic dispersion to obtain mica-modified silica sol.

[0049] (...

Embodiment 2

[0067] The difference from Example 1 is that the prepared rare earth element co-doped graphene photocatalytic nanogel is coated on the non-woven substrate supported by the previous slurry, and the coating times are 2 times.

Embodiment 3

[0069] The difference from Example 1 is that 0.4 g of graphene is added to the gel D, and the rare earth element co-doped graphene photocatalytic nanogel is obtained by ultrasonic treatment.

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