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Photocatalyst-supported hydrogel as well as preparation method and application thereof

A photocatalyst and hydrogel technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of unknown degradation performance of micro-pollutant atenolol , reduce the utilization rate of light, contact efficiency, reduce the photocatalytic performance of titanium dioxide, etc., to achieve the effect of good reuse performance, low cost, and improved photocatalytic efficiency

Active Publication Date: 2017-08-18
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantages are: although the method steps of hydrogel-loaded catalysts are disclosed, the preparation time is long, the operation steps are complicated, the energy consumption is high, and the mechanical properties of the prepared hydrogel are unknown; although the easily degradable dye rhodan Ming B has a high degradation rate, but the degradation performance of atenolol, an environmental micro-pollutant that is difficult to degrade, is unknown; fixing titanium dioxide into a spherical monolithic photocatalyst makes titanium dioxide densely piled together, reducing the light exposure. Utilization and contact efficiency with pollutants, which in turn reduces the photocatalytic performance of TiO

Method used

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  • Photocatalyst-supported hydrogel as well as preparation method and application thereof
  • Photocatalyst-supported hydrogel as well as preparation method and application thereof
  • Photocatalyst-supported hydrogel as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0040] Such as figure 2 The photocatalyst-loaded hydrogel of this embodiment includes a hydrogel and a photocatalyst, and the photocatalyst is distributed inside and on the surface of the hydrogel.

[0041] In the prior art, the powder photocatalyst is difficult to realize recycling. In this embodiment, the powder photocatalyst is creatively loaded on the hydrogel, and the photocatalyst can be recycled. The preparation method is simple, the cost is low, the energy consumption is low, and the preparation process It is green and environmentally friendly, has good reusability, is conducive to industrial promotion, and has a good degradation effect on atenolol, a pollutant in water bodies.

Embodiment 2

[0043] Such as figure 2 The photocatalyst-loaded hydrogel of this embodiment includes a hydrogel and a photocatalyst, and the photocatalyst is distributed inside and on the surface of the hydrogel. Among them, conductive materials are added, and the conductive materials and photocatalysts are distributed in the interior and surface of the hydrogel together. In specific applications, the conductive material can be graphite or graphene. On the one hand, the combination of conductive materials and photocatalysts improves the catalytic performance of the photocatalyst itself. On the other hand, the combination of traditional hydrogels with graphite conductive materials and bismuth oxychloride photocatalytic materials endows the hydrogel with electrical response characteristics and photocatalytic activity. The photogenerated electrons generated in the catalyst can be conducted through graphite to inhibit the recombination of photogenerated electrons and holes and improve the phot...

Embodiment 3

[0045] A kind of photocatalyst-loaded hydrogel of the present embodiment, such as figure 2 As shown, further improvements are made on the basis of any one of the technical solutions in Examples 1-2, and the hydrogel includes a hydrogel polymerized from acrylic acid, acrylamide or other monomers. Utilizing the soft mechanical properties of the hydrogel itself facilitates the photocatalytic reaction.

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Abstract

The invention discloses photocatalyst-supported hydrogel as well as a preparation method and an application thereof and belongs to the field of environment function materials and catalysis. The photocatalyst-supported hydrogel comprises a conventional hydrogel composite conductive material and a photocatalysis material, wherein conventional hydrogel comprises acyclic acid / acrylamide hydrogel and can also be hydrogel formed through polymerization of other monomers. The conductive material comprises graphite, graphene and the like, and a photocatalyst can comprise bismuth oxychloride, titanium dioxide and the like. Bismuth oxychloride is immobilized, and the photocatalysis properties of bismuth oxychloride and electrical stimulation responsiveness of the hydrogel are combined. The conductive material in the compound hydrogel can transfer photo-induced electrons produced by bismuth oxychloride under illumination, the mass transfer rate between a catalyst and a pollutant cannot be affected, and the photocatalysis performance of bismuth oxychloride is improved. The synthesis method is simple and efficient, can realize industrial production and can be used for degrading atenolol, other medicines, personal care products and other organic pollutants in water.

Description

technical field [0001] The invention relates to the field of environmental functional materials and catalysis, in particular to a photocatalyst-loaded hydrogel and its preparation method and application. Background technique [0002] In addition to pesticides and industrial products with acute toxicity or carcinogenicity, there are also a large class of chemical substances with biological activity in the environment where human beings live. Such chemicals include prescription drugs and biologics, diagnostic reagents, pharmaceuticals such as sunscreens, and personal care products used by humans or animals, and have attracted widespread attention from scientists. The U.S. Environmental Protection Agency (EPA) has defined such chemical substances as PPCPs, the acronym for pharmaceuticals and personal care products. Although the content of PPCPs in the water environment is in ng L -1 —μg L -1 However, the long-term exposure caused by the continuous release of PPCPs will cause...

Claims

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Application Information

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IPC IPC(8): B01J31/26C02F1/30C02F101/30
CPCC02F1/30B01J31/06B01J31/26C02F2305/10C02F2101/30B01J35/39B01J35/23Y02W10/37
Inventor 毛亮郭敬翟傈李清钞
Owner NANJING UNIV
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