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au/zno three-dimensional inverse opal heterostructure photocatalyst and its in situ preparation method and application

An anti-opal and heterostructure technology, which is applied in the field of composite nanomaterial photocatalyst preparation and environmental pollutant treatment, can solve the problem of narrow spectral response range of photonic crystal photocatalysts, unsatisfactory carrier separation efficiency, and low photocatalytic degradation efficiency problems such as high activity stability, high degradation rate and mineralization rate, and controllable reaction conditions

Active Publication Date: 2019-09-06
HUAIBEI NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to provide a novel, wide-spectrum response, high-efficiency Au / ZnO three-dimensional inverse opal heterostructure photocatalyst and its preparation method for photocatalytic degradation of environmental endocrine disrupting substances. The technical problem to be solved is that the existing optical Low photocatalytic degradation efficiency of catalyst BPA, narrow spectral response range of existing photonic crystal photocatalysts, unsatisfactory carrier separation efficiency, complex preparation process and high cost

Method used

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  • au/zno three-dimensional inverse opal heterostructure photocatalyst and its in situ preparation method and application

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Embodiment 1

[0029] This embodiment prepares Au / ZnO-IO according to the following steps:

[0030] a. Disperse the surface carboxy-modified PS spheres (PS spheres with a particle size of 180nm) in water to obtain a PS emulsion with a mass percentage of 1.5%; dissolve 3.5g of zinc nitrate and 0.04g of chloroauric acid in 20mL Au / ZnO precursor solution is obtained in a mixed solution composed of water and ethanol at a volume ratio of 3:2;

[0031] b. Clean up, N 2 The dried glass slide was vertically inserted into a 50mL plastic beaker filled with 20mL PS emulsion, and fixed with scotch tape; then placed in an oven at a temperature of 45°C and a humidity of 80% to 90% for 20 hours to obtain opal Structural PS ball template;

[0032] c. Heat-treat the opal-structured PS ball template at 90°C for 30 minutes without wind. After natural cooling, slowly put it into the Au / ZnO precursor solution. After standing still for 120 seconds, take it out slowly and place it flat on the level. On the tabl...

Embodiment 2

[0039] In order to compare with the preparation of Au / ZnO-IO by the in-situ method, ZnO-IO / Au was prepared by a two-step method: ZnO-IO was prepared by the same synthesis steps as the preparation of Au / ZnO-IO (the difference is that no Chlorauric acid), and then Au nanoparticles were loaded on ZnO-IO. The process of loading Au nanoparticles on ZnO-IO is as follows: first put ZnO-IO on the anode tray at the bottom of the magnetron sputtering chamber (the magnetron sputtering instrument used is England, Emitech K550X), vacuumize, and sputter under an argon atmosphere Shoot for 30s to get ZnO-IO / Au.

[0040] Figure 4 It is the TEM image of ZnO-IO / Au, from which it can be seen that the small Au nanoparticles are not evenly loaded on the ZnO skeleton, but are loaded on part of the ZnO skeleton in the direction of the arrow in the figure, and within the range of the dotted line There are no small Au particles attached to the ZnO. This is because magnetron sputtering is from top ...

Embodiment 3

[0042] In order to compare with Au / ZnO, the preparation process of ZnO is the same as in Example 1, except that there is no PS ball on the glass slide and no chloroauric acid in the precursor solution.

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Abstract

The invention discloses an Au / ZnO three-dimensional inverse opal heterostructure photocatalyst as well as an in-situ preparation method and application thereof. The Au / ZnO three-dimensional inverse opal heterostructure photocatalyst as well as the in-situ preparation method and the application thereof are characterized in that: the photocatalyst is an Au / ZnO three-dimensional inverse opal heterostructure prepared by an in-situ growth method, Au nano-particles are evenly embedded in both sides of the inside and outside of ZnO three-dimensional orderly FCC pore structure. The single-step in-situ preparation method of the photocatalyst has the advantages of high activity stability, simple preparation process and controllable reaction conditions. The prepared catalyst can be used for photocatalytic degradation governance of organic pollutants (especially environmental endocrine interferon) in water and has high degradation rate and mineralization rate.

Description

technical field [0001] The invention relates to the field of composite nanomaterial photocatalyst preparation and environmental pollutant treatment, in particular to the preparation of a high-performance three-dimensional ordered macropore-mesoporous Au / ZnO heterogeneous-inverse opal structure photonic crystal and its application in the field of photocatalysis Applications. Background technique [0002] At present, while the development of industrialization has created huge material wealth for the society, it has also caused serious environmental pollution. Especially in recent decades, the widespread production and use of Environmental Endocrine Disruptors (EEDs) (chemicals from all walks of life, including insecticides, flame retardants, fungicides, pesticides, disinfectants, cleaning agents and plastics, etc., especially in the plastic industry), which has caused it to enter natural water bodies, seriously endangering the reproductive system and genetics of animals and h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/60C02F1/30C02F1/32C02F101/34
CPCC02F1/30C02F1/32B01J23/60C02F2101/345C02F2101/305C02F2305/10B01J35/39
Inventor 孟苏刚付先亮陈士夫
Owner HUAIBEI NORMAL UNIVERSITY
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