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Functional film with multimetal oxacid salt and macrocyclic copper assembled by oneself capable of photocatalytically degradating organic dye

A technology of polyoxometalates and organic dyes is applied in the field of functional films capable of photocatalytic degradation of organic dyes to achieve the effects of inhibiting recombination, good degradation and improving photocatalytic efficiency

Inactive Publication Date: 2007-10-17
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of this film as a photocatalytic material for the degradation of organic dyes has not been reported

Method used

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  • Functional film with multimetal oxacid salt and macrocyclic copper assembled by oneself capable of photocatalytically degradating organic dye
  • Functional film with multimetal oxacid salt and macrocyclic copper assembled by oneself capable of photocatalytically degradating organic dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: (CoW 12 6- / C) n Preparation of multilayer films

[0009] First, clean the quartz sheet: put the quartz glass sheet in 98% H 2 SO 4 with 30%H 2 o 2 (7:3v / v) dipping treatment at 80°C for 40min, take it out and wash it with distilled water; then immerse in H 2 O:H 2 o 2 : NH 3 =5:1:1 (v / v / v) dipping treatment at 70°C for 20 minutes, take it out, wash it with distilled water, and dry it with nitrogen to obtain a film-forming substrate for use.

[0010] Then perform PEI cationization on the substrate: immerse the substrate after the above-mentioned treatment procedure in 10 mg / mL polyethyleneimine PEI solution for 20 minutes, take it out, wash it with distilled water, and dry it with nitrogen.

[0011] Then the PEI cationized substrates were alternately immersed in 5.0×10 -2 M's CoW 12 6- solution and 5.0 x 10 -3 In the macrocyclic copper solution, place it separately for 20 min, wash it with distilled water after each immersion step, and dry it...

Embodiment 2

[0014] Embodiment 2: (PW 12 6- / C) n Preparation of multilayer films

[0015] Synthesis steps and testing steps refer to Example 1. The immersion solution of PEI cationized substrate adopts 5.0×10 -3 M's PW 12 6- solution.

[0016] The ultraviolet-visible spectrum shows that the thin film of preparation is at wavelength 197nm and 260nm place (PW 12 6- / C) n The absorbance of the film increases linearly with the increase of the number of layers, indicating that the prepared film has good uniform growth.

[0017] The atomic force microscope characterization results of the film show that the particles on the surface of the film are prominent and relatively uniform, indicating that the film was successfully prepared.

Embodiment 3

[0018] Embodiment 3: (CoW 12 6- / C) n Photocatalytic Activity Test of Multilayer Thin Films

[0019] Photocatalytic experiment: irradiated by a 300W high-pressure mercury lamp (CoW 12 6- / C) n Multilayer films were accomplished by degrading methyl orange in aqueous solution. The specific process is: will cover with (CoW 12 6- / C) n A quartz glass sheet (12mm×25mm) with a multilayer film is vertically inserted into a quartz test tube filled with 20ml methyl orange aqueous solution (20mg / L), and the quartz test tube is placed 8cm away from the ultraviolet light source, and the wavelength range of the light source is 320-400nm.

[0020] Evaluation of photocatalytic activity: After a certain period of light, measure the change of the absorption spectrum of the methyl orange solution during the light process, and measure the absorbance ε of the reaction solution at 463nm 1 (sampling once every half hour, six consecutive times); In addition, blank and control experiments we...

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Abstract

A self-assembly functional film of polyoxometallate and large ring copper for photocatalysis degrading organic dye relates to a preparing method, a representation and photocatalysis activity evaluation of the self-assembly film of polyoxometallate and large ring copper. The film is formed by the polyoxometallate K6MX12O40(M=Co, B, Si, P; X=W, Mo) and large ring copper by an electrostatic layer self-assembly manner. The film not only remains photocatalysis activity of the polyoxometallate for degrading organic dye, but also solves the problem that it is not easy to treat and recycle organic dye waste water due to polyacid is freely solubled to polar solvent, thereby, the invention has abroad application prospects for treating industrial waste water with large scale.

Description

technical field [0001] The invention relates to a thin film with photocatalytic activity prepared by an electrostatic self-assembly method, in particular to a functional thin film capable of photocatalytically degrading organic dyes self-assembled by polyoxometalate and macrocyclic copper. Background technique [0002] With the development of industry, the limited water resources of human beings are increasingly polluted, and the removal of toxic and harmful chemicals such as pesticides and organic dyes in water has become an important task in the field of environmental protection. However, most of the current water pollution treatment methods are aimed at pollutants with large discharge volume and high concentration, and they are powerless to purify the priority pollutants in water bodies with low concentration and difficult to transform. However, the photocatalytic degradation technology developed in the 1980s provides a good way to solve this problem. In my country, dye ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J23/882B01J27/188C02F1/30C02F1/72
Inventor 曹荣李涛海高水英李凤
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI