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Preparation method for molecular imprinting-Fe doped TiO2 with high catalytic degradation activity under visible light

A technology of molecular imprinting and catalytic degradation, which is applied in the direction of chemical instruments and methods, and other chemical processes, can solve problems such as invention patent blanks, and achieve the effects of improving utilization rate, improving the ability to degrade organic pollutants, and improving adsorption capacity

Inactive Publication Date: 2015-05-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, domestic and foreign research on non-metallic elements doped TiO 2 There are many applications for degrading organic pollutants, and there are also a small amount of molecularly imprinted TiO 2 Reports applied to photocatalytic degradation, but will be doped with TiO 2 Reports and invention patents for photocatalytic degradation combined with molecular imprinting technology are still blank

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Fe-doped TiO 2 The synthesis of: under ice bath conditions, first TiCl 4 Add to ice water dropwise, and then add FeCl with a molar ratio of 1% to the titanium source 3 ·6H 2 O, heated to reflux for 4h, aged for 2h, then centrifuged the obtained light yellow substance, washed with water, washed with ethanol, dried at 80°C, and finally roasted at 450°C for 3h to obtain Fe-doped TiO 2 .

[0017] (2) Molecular imprinting – Fe-doped TiO 2 Synthesis: Add 0.023g p-phenylenediamine and 0.01g salicylic acid into 40mL deionized water, stir for 30min, adjust the pH of the solution to 1, then add 0.2g Fe-doped TiO 2 , continue to stir for 30min, add 0.045g ammonium persulfate under ice bath conditions, stir for 4h under ice bath, centrifuge the solution after reaction, first use Na 2 CO 3 Solution washing, then washing with water, and finally drying at 50°C to obtain molecular imprinting – Fe-doped TiO 2 catalyst.

[0018] (3) Molecular imprinting – Fe-doped TiO 2 Degr...

Embodiment 2

[0020] (1) Fe-doped TiO 2 The synthesis of: under ice bath conditions, first TiCl 4 Add dropwise to ice water, and then add FeCl with a molar ratio of 1% to the titanium source 3 ·6H 2 O, heated to reflux for 4h, aged for 2h, then centrifuged the obtained light yellow substance, washed with water, washed with ethanol, dried at 80°C, and finally roasted at 450°C for 3h to obtain Fe-doped TiO 2 .

[0021] (2) Molecular imprinting – Fe-doped TiO 2Synthesis: Add 0.046g p-phenylenediamine and 0.02g o-chlorophenol into 40mL deionized water, stir for 30min, adjust the pH of the solution to 2, then add 0.2g Fe-doped TiO 2 , continue to stir for 30min, add 0.18g ammonium persulfate under ice bath condition, stir 2h under ice bath, centrifuge the solution after reaction, first use Na 2 CO 3 Solution washing, then washing with water, and finally drying at 50°C to obtain molecular imprinting – Fe-doped TiO 2 catalyst.

[0022] (3) Molecular imprinting – Fe-doped TiO 2 Degradation...

Embodiment 3

[0024] (1) Fe-doped TiO 2 The synthesis of: under ice bath conditions, first TiCl 4 Add to ice water dropwise, and then add FeCl with a molar ratio of 1% to the titanium source 3 ·6H 2 O, heated to reflux for 4h, aged for 2h, then centrifuged the obtained light yellow substance, washed with water, washed with ethanol, dried at 80°C, and finally roasted at 450°C for 3h to obtain Fe-doped TiO 2 .

[0025] (2) Molecular imprinting – Fe-doped TiO 2 Synthesis: Add 0.0156g p-phenylenediamine and 0.0133g o-nitrophenol into 40mL deionized water, stir for 30min, adjust the pH of the solution to 0.5, then add 0.2g Fe-doped TiO 2 , continue to stir for 30min, add 0.45g ammonium persulfate under ice bath condition, stir under ice bath for 6h, centrifuge the solution after reaction, first use Na 2 CO 3 Solution washing, then washing with water, and finally drying at 50°C to obtain molecular imprinting – Fe-doped TiO 2 catalyst.

[0026] (3) Molecular imprinting – Fe-doped TiO 2 De...

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PUM

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Abstract

Belonging to the technical field of photocatalyst preparation, the invention relates to a preparation method for molecular imprinting-Fe doped TiO2 with high catalytic degradation activity under visible light. According to the invention, TiCl4 is adopted as the titanium source to synthesize Fe doped TiO2 by a hydrothermal technique, then p-phenylenediamine is taken as the monomer and cross-linking agent, and an organic pollutant is employed as the template molecule to carry out chemical oxidation polymerization to synthesize molecular imprinting-Fe doped TiO2. Compared with Fe doped TiO2, the synthesized molecular imprinting-Fe doped TiO2 has stronger adsorption capacity on organic pollutants, has higher catalytic degradation activity on organic pollutants under visible light, and has the catalytic degradation ability increased by 35%, thus having high practical application value.

Description

technical field [0001] The present invention relates to a molecularly imprinted-Fe-doped TiO with high catalytic degradation activity under visible light 2 The preparation method belongs to the technical field of photocatalyst preparation. Background technique [0002] Nano-TiO 2 Photocatalyst has always been a research hotspot because of its high activity, low cost, wide application, mesoporous structure and stable physical and chemical properties. Due to anatase TiO 2 Up to 3.2eV energy level difference, making TiO 2 Nanoparticles can only use 3-5% of the energy in sunlight. Doping of metal and nonmetal elements is a simple and effective way to modify TiO 2 method. It can not only make TiO 2 The active region shifts from the ultraviolet to the visible light region, which can also effectively prevent electrons and holes from agglomerating. [0003] with TiO 2 In comparison, TiO doped with metal and nonmetal elements 2 In the visible light region, the photocatalyti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J20/06A62D3/17
Inventor 刘湘万会达张佳瑜
Owner JIANGNAN UNIV
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