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Iron-doped titanium-silicon molecular sieve fe-ts-1 composite photocatalyst, preparation method and application

A titanium-silicon molecular sieve, TS-1 technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of improving the utilization rate of light energy, accelerating the rate, and inhibiting the reorganization of holes

Active Publication Date: 2020-06-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] So far, there have been no reports of introducing iron-containing compounds into TS-1 to prepare iron-doped titanium-silicon molecular sieves, and using photo-Fenton reaction, adsorption and photocatalysis as photocatalysts to efficiently degrade high-concentration dye wastewater

Method used

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  • Iron-doped titanium-silicon molecular sieve fe-ts-1 composite photocatalyst, preparation method and application
  • Iron-doped titanium-silicon molecular sieve fe-ts-1 composite photocatalyst, preparation method and application
  • Iron-doped titanium-silicon molecular sieve fe-ts-1 composite photocatalyst, preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0043] Take 0.015g, 0.03g, 0.045g, 0.06g, 0.09g of the composite photocatalyst Fe-TS-1 whose raw material ratio m(Fe):m(TS-1) is 0.15, add 300mL azo dye AO7 In the dye wastewater, the mass concentration of the composite photocatalyst Fe-TS-1 is 0.05g / L, 0.10g / L, 0.15g / L, 0.20g / L, 0.30g / L, and is adsorbed in the photochemical reaction instrument deal with. The adsorption effect of composite photocatalyst Fe-TS-1 on azo dye AO7 is as follows: Figure 5 shown, from Figure 5 It can be seen that the as-prepared composite photocatalyst Fe-TS-1 still has excellent adsorption performance.

Embodiment 2

[0045] Take 0.015g of composite photocatalyst Fe-TS-1 whose raw material ratio m(Fe):m(TS-1) is 0.01, 0.05, 0.10, 0.15, 0.20, 0.30, respectively, and add 300mL of azo dye AO7 dye wastewater, And add 3mL H to the azo dye AO7 dye wastewater 2 o 2 , with ultraviolet light as the light source, the photodegradation test of azo dye AO7 was carried out in a photochemical reaction apparatus. Photocatalytic degradation effect such as Figure 6 shown, from Figure 6 It can be seen that the composite photocatalyst Fe-TS-1 with different iron loadings has good photocatalytic activity, and with the increase of iron loading, the activity of the composite photocatalyst Fe-TS-1 increases, but when When m(Fe):m(TS-1) exceeds 0.15, the activity becomes poor.

Embodiment 3

[0047] Take 0.015g, 0.03g, 0.045g, 0.06g, 0.09g of the composite photocatalyst Fe-TS-1 whose raw material ratio m(Fe):m(TS-1) is 0.15, add 300mL azo dye AO7 dye wastewater, and add 3mL H to the azo dye AO7 dye wastewater 2 o 2 , that is, the mass concentrations of the composite photocatalyst Fe-TS-1 are 0.05g / L, 0.10g / L, 0.15g / L, 0.20g / L, 0.30g / L, respectively. In the photochemical reaction apparatus, the photodegradation test was carried out with a UV lamp as the light source. The photocatalytic degradation effect of different quality composite photocatalyst Fe-TS-1 on azo dye AO7 is as follows: Figure 7 As shown, the degradation rate of AO7 increases with the increase of catalyst addition; compared with the system without catalyst addition, the degradation rate of AO7 is greatly improved, which further illustrates the good photocatalytic activity of the composite photocatalyst Fe-TS-1

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Abstract

The invention provides an iron-doped titanium silicalite molecular sieve Fe-TS-1 compound photocatalyst, a preparation method and application. The preparation method comprises the steps: adding FeSO4.7H2O into deionized water under the stirring condition to be dissolved, then adding TS-1 powder, stirring intensely, drying, calcining and activating, cooling to room temperature and grinding to obtain an Fe-TS-1 compound photocatalyst. Pore channels and surface of the TS-1 are filled with doped Fe in a ferric oxide mode. In the Fe-TS-1 compound photocatalyst, the TS-1 is utilized as an adsorbentto adsorb organisms into nanoscale micropores to create a partial high-concentration pollutant environment, .OH generated on the surface of the catalyst has the priority to reacting with the organismsin the micropores, and an adsorption-degradation-activation cyclic process is achieved; the TS-1 has a -O-Ti-O-semiconductor chain, so that the TS-1 is prone to being stimulated by ultraviolet lightto generate electrons and holes, the electrons are caught by doped Fe<3+>, electron hole recombination is inhibited, and a solar energy utilization rate is improved; the Fe<3+> on the surface of the catalyst can be reduced by the ultraviolet light, a speed of fenton reaction is quickened, and oxidizing capacity of the whole system is improved.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, and relates to an iron-doped titanium-silicon molecular sieve Fe-TS-1 composite photocatalyst, a preparation method and an application. Background technique [0002] With the development of society and the acceleration of industrialization, environmental problems, especially water environment problems, have become increasingly prominent, causing serious damage to aquatic ecosystems, threatening human health and survival, and hindering the sustainable development of society. Traditional water treatment technologies such as physical methods, chemical methods, and biological methods have their own shortcomings and cannot meet the requirements of sustainable development of human society. The green oxidation technology using hydroxyl radicals (·OH) as the oxidant has become a hot research topic at present. Among them, photocatalytic technology and Fenton or Fenton-like tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03C02F1/32C02F1/72C02F1/28C02F101/38
Inventor 吴强顺王慧娟
Owner JIANGSU UNIV