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Preparation method of Fe3+ and N co-doping titanium dioxide fiber porous membrane

A technology of titanium dioxide and porous membrane, which is applied in the field of photocatalyst preparation, can solve problems such as inability to spin, and achieve the effects of easy separation and recovery, simple process, and high photocatalytic efficiency

Inactive Publication Date: 2014-07-09
JIAXING UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of Fe 3+ , N co-doped titania fiber porous membrane preparation method, using electrospinning method to prepare Fe 3+ , N co-doped titanium dioxide fiber porous membrane, by properly adjusting the spinning solution formula to overcome the Fe(NO 3 ) 3 9H 2 O is added to the titanium precursor spinning solution, which causes the problem that tetra-n-butyl titanate is hydrolyzed in advance and cannot be spun

Method used

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  • Preparation method of Fe3+ and N co-doping titanium dioxide fiber porous membrane
  • Preparation method of Fe3+ and N co-doping titanium dioxide fiber porous membrane

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Embodiment 1

[0026] This embodiment Fe 3+ , N co-doped titania fiber porous membrane and Fe 3+ , N co-doped TiO 2 The photocatalytic degradation of methylene blue by the fiber porous membrane is achieved through the following steps:

[0027] Step 1: Fe(NO 3 ) 3 9H 2 Preparation of O-doped Ti Precursor Fibrous Porous Membrane

[0028] a. Preparation of electrospinning solution: Weigh 3g of tetra-n-butyl titanate, mix with 3mL of glacial acetic acid and 3mL of ethanol, then add Fe(NO 3 ) 3 9H 2 O. After stirring for 30 minutes, add 3 mL of polyvinylpyrrolidone in ethanol solution (containing 0.6 g of polyvinylpyrrolidone), and continue stirring for 1 day to obtain an electrospinning solution.

[0029] b.Fe(NO 3 ) 3 9H 2 Preparation of O-doped titanium precursor fiber porous membrane: The obtained spinning solution was poured into a 20 mL syringe for electrospinning, and the syringe was connected with a stainless steel needle with an inner diameter of 0.7 mm. Then the positive po...

Embodiment 2

[0036] The difference between this embodiment and the first embodiment is the third step, and other steps and parameters are the same as those of the first embodiment.

[0037] The third step is: Fe 3+ , N co-doped TiO 2 Solar Photocatalytic Degradation of Printing and Dyeing Wastewater with Fibrous Porous Membrane

[0038] Add 100ml of waste water into the beaker, first measure its pH value, adjust the pH to the required value with dilute glacial acetic acid and sodium hydroxide solution, then add 100mg of Fe into the beaker containing waste water 3+ , N co-doped TiO 2 After the fiber porous membrane was degraded under sunlight (moderately weak ultraviolet rays) for 3 hours, the catalyst was taken out from the beaker, and the wastewater after catalytic degradation was centrifuged, and the absorbance and COD value were tested respectively.

Embodiment 3

[0040] For different doping amounts of Fe 3+ , N fiber membranes were prepared and their properties were tested.

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Abstract

Provided is a preparation method of a Fe3+ and N co-doping titanium dioxide fiber porous membrane. The preparation method comprises first adopting tetra-n-butyl titanate, ferric nitrate, ethanol, glacial acetic acid and polyvinylpyrrolidone to prepare a spinning solution, preparing an iron nitrate nonahydrate doping titanium precursor micron / nanometer fiber porous membrane in an electrostatic spinning method, and finally obtaining the Fe3+ and N co-doping titanium dioxide fiber porous membrane by heat treatment. The preparation method enables a process and devices to be simple, and is stable, reliable and convenient to operate. The obtained Fe3+ and N co-doping titanium dioxide fiber porous membrane serves as a photocatalyst, is high in photocatalysis efficiency and convenient to reuse. Under irradiation of sunlight, organisms in waste water are degraded into small-molecule water and carbon dioxide, chroma and chemical oxygen demand (COD) value of the waste water after treatment can meet the emission standard. The process is simple, practicable and wide in application scope.

Description

technical field [0001] The present invention relates to a kind of preparation technology of photocatalyst, specifically relate to a kind of making TiO 2 The preparation technology of photocatalyst modified materials with visible light absorption function, the technology used is to use electrospinning technology, sol-gel technology and high temperature calcination method to make Fe 3+ , N co-doped TiO 2 Micro / nanofibrous porous membrane. Background technique [0002] Titanium dioxide has a high energy band gap and only responds to ultraviolet light. In order to improve the spectral response range and catalytic efficiency of photocatalysts, surface deposition of metals or metal oxides, semiconductor composites, metal ions, non-metallic ion doping and organic dyes have been used. sensitization, etc. Current research shows that: for TiO 2 Co-doping modification of photocatalyst with metal and non-metal ions can significantly improve its photocatalytic performance. The incor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745B01J35/10C02F1/30
CPCY02W10/37
Inventor 俞巧珍金向军虞华东
Owner JIAXING UNIV
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