Preparation of Ag loaded TiO2-ZnO inverse opal photonic crystal photocatalytic material

A technology of photocatalytic materials and photonic crystals, applied in the field of photocatalysis, can solve the problems of inconvenient use, complicated post-processing, difficult recycling, etc., achieve effective degradation and improve photocatalytic efficiency

Inactive Publication Date: 2014-11-05
任文祥 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In summary, the hierarchical macroporous TiO 2 Materials such as macroporous ordered structures of inverse opal photonic crystals, TiO loaded with noble metals 2 Photocatalytic materials such as nanoparticles have achieved certain research results, but the photocatalytic efficiency needs to be further impro

Method used

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  • Preparation of Ag loaded TiO2-ZnO inverse opal photonic crystal photocatalytic material
  • Preparation of Ag loaded TiO2-ZnO inverse opal photonic crystal photocatalytic material
  • Preparation of Ag loaded TiO2-ZnO inverse opal photonic crystal photocatalytic material

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Embodiment 1

[0031] 1. Preparation of opal-type polymer photonic crystal template

[0032] The core-shell polymer poly(styrene-acrylamide) latex microspheres with a particle size of 255 nm self-assembled on a glass substrate to form a film by vertical deposition method under constant temperature conditions. Glass substrate (1cm×3cm) in hydrogen peroxide (H 2 o 2 ) and concentrated sulfuric acid (H 2 SO 4 ) soaked in the washing solution prepared at a volume ratio of 3:7 for 2h, rinsed with a large amount of water, rinsed with distilled water, and then vertically placed in a monodisperse poly(styrene-acrylamide) water with a concentration of 0.2wt%. In a small beaker of the emulsion, the self-assembled film was formed at a constant temperature of 60°C for about 48 hours, and a red opal-type polymer photonic crystal film was obtained. The surface morphology was characterized by scanning electron microscopy, and the photonic band gap was characterized by ultraviolet-visible reflectance sp...

Embodiment 2

[0049] 1. Preparation of opal-type polymer photonic crystal template

[0050] Similarly, core-shell polymer poly(styrene-acrylamide) latex microspheres with a particle size of 255 nm self-assembled on a glass substrate to form a film by vertical deposition method under constant temperature conditions. Glass substrate (1cm×3cm) in hydrogen peroxide (H 2 o 2 ) and concentrated sulfuric acid (H 2 SO 4 ) soaked in the washing solution prepared at a volume ratio of 3:7 for 1.5h, rinsed with a large amount of water, rinsed with distilled water, and then placed vertically in a monodisperse poly(styrene-acrylamide) with a concentration of 0.4wt%. In a small beaker of the water emulsion, self-assemble into a film at a constant temperature of 65° C. for about 36 hours, and a red opal-type polymer photonic crystal film is obtained. The surface morphology was characterized by scanning electron microscopy, and the photonic band gap was characterized by ultraviolet-visible reflectance s...

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Abstract

The invention relates to a preparation method of a photocatalytic material for an Ag loaded TiO2-ZnO inverse opal photonic crystal. Specifically, the method includes: taking poly(styrene-acrylamide) microsphere photonic crystal as a template, conducting filling with TiO2-ZnO composite sol, conducting ignition to remove the template, thus obtaining a TiO2-ZnO inverse opal photonic crystal; adsorbing AgNO3, and reducing Ag<+> into nano-Ag by ultraviolet irradiation so as to obtain the nano-Ag loaded TiO2-ZnO inverse opal photonic crystal; and representing the surface appearance and photonic band gap through a scanning electron microscope and a reflection spectrum. Under the irradiation of a metal halide light, the prepared photonic crystal shows good photocatalytic performance on photocatalytic degradation of Rhodamine B, which is decided by a high specific surface area of the inverse opal photonic crystal and the photocatalytic properties of noble metal nano-particles. The method provided by the invention is of important significance for preparation and development of novel photocatalytic materials.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a preparation method of a photocatalysis material. The photocatalytic material is an Ag-loaded TiO 2 The photocatalytic material of -ZnO inverse opal photonic crystal can be used to improve the photocatalytic efficiency of the material, and more effectively degrade organic pollutants in domestic and industrial wastewater. Background technique [0002] In recent years, many photocatalysts for degrading organic matter and splitting water have been developed, such as SrTiO 3 , ZrO 2 、 Ta 2 o 5 , NaTaO 3 : La, CdS and graphite phase C 3 N 4 etc. But since TiO 2 Non-toxic, easy to obtain, low cost and other characteristics, making TiO 2 Research has also been uninterrupted. With the continuous development of nanotechnology, people have realized the relationship between structure and material properties, and the development of TiO with nanostructure 2 Research on photocatalyst...

Claims

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Application Information

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IPC IPC(8): B01J23/66C02F1/30
Inventor 任文祥张玉琦武开业王丹军
Owner 任文祥
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