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a load tio 2 Preparation method of pps photocatalytic film

A technology of photocatalytic membranes and microporous membranes, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of limited exposure of catalyst active sites and small contribution , single function and other problems, to achieve high crystallinity, improve catalytic efficiency, and high catalytic efficiency

Active Publication Date: 2021-08-13
TIANJIN POLYTECHNIC UNIV
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  • Description
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Problems solved by technology

However, the active site exposure of the catalyst is relatively limited and the contribution of the matrix to the improvement of the catalytic efficiency is relatively small, and the function is relatively single

Method used

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  • a load tio <sub>2</sub> Preparation method of pps photocatalytic film
  • a load tio <sub>2</sub> Preparation method of pps photocatalytic film
  • a load tio <sub>2</sub> Preparation method of pps photocatalytic film

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preparation example Construction

[0022] The invention provides a loaded TiO 2 The preparation method (abbreviation method) of the PPS photocatalytic film is characterized in that the method may further comprise the steps:

[0023] 1) TiO 2 Preparation of precursor solution: Mix the composite solution of titanium source, sulfate, ethanol, water and hydrochloric acid, and stir until homogeneous at room temperature to obtain TiO 2 Precursor solution; TiO 2 The concentration of titanium source in the precursor solution is 1-500g / L, the concentration of sulfate is 1-50g / L; the volume ratio of the ethanol, water and hydrochloric acid is 2-6:1-3:1-3;

[0024] Preferably, the titanium source concentration is 10-200g / L, the sulfate concentration is 2-10g / L, and the volume ratio of ethanol, water and hydrochloric acid is 3-5:1-3:1-3;

[0025] The titanium source is at least one of tetrabutyl titanate, titanium tetrachloride, titanium sulfate, titanium trichloride, isopropyl titanate, titanocene dichloride, titanium ...

Embodiment 1

[0032] 1) Mix titanium tetrachloride, ammonium sulfate, ethanol, water and hydrochloric acid at a volume ratio of 2:1:1 at room temperature and stir until homogeneous to obtain TiO 2 Precursor solution; TiO 2 The concentration of titanium source in the precursor solution is 50g / L, and the concentration of sulfate is 1g / L;

[0033] 2) Wet the PPS microporous membrane in ethanol, then transfer to a 20% nitric acid solution and stir at 20°C for 4 hours.

[0034] 3) Put 20cm 2 The obtained pretreated PPS microporous membrane was immersed in 20ml of precursor solution and transferred to a hydrothermal reaction kettle for hydrothermal reaction for 24 hours at a reaction temperature of 220°C. The resulting membrane was washed with deionized water and dried in an oven Get PPS@TiO within 24 hours 2 photocatalytic film.

[0035] After testing, PPS@TiO 2The porosity of the photocatalytic film was 78.1%, and the loading rate of TiO2 was 19.2%. The photocatalytic performance was dete...

Embodiment 2

[0037] 1) Mix tetrabutyl titanate, ammonium sulfate, ethanol, water and hydrochloric acid at a volume ratio of 4:1:2 at room temperature and stir until homogeneous to obtain TiO 2 Precursor solution; TiO 2 The concentration of titanium source in the precursor solution is 150g / L, and the concentration of sulfate is 5g / L;

[0038] 2) Wet the PPS microporous membrane in ethanol, then transfer to a 10% nitric acid solution and stir at 50°C for 1 hour.

[0039] 3) Put 20cm 2 The obtained pretreated PPS microporous membrane was immersed in 10ml of precursor solution and transferred to a hydrothermal reaction kettle for hydrothermal reaction for 12 hours at a reaction temperature of 180°C. The resulting membrane was washed with deionized water and dried in an oven Get PPS@TiO within 24 hours 2 photocatalytic film.

[0040] After testing, PPS@TiO 2 The porosity of the photocatalytic film was 73.4%, and the loading rate of TiO2 was 50.6%. The photocatalytic performance was measur...

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Abstract

The invention discloses a loaded TiO 2 The preparation method of the PPS photocatalytic membrane, comprises the following steps: mixes the composite solution of titanium source, sulfate and ethanol, water and hydrochloric acid, and stirs to homogeneous phase at normal temperature, obtains TiO 2 Precursor solution; wet the PPS microporous membrane in ethanol, and then transfer it to a nitric acid solution; immerse the PPS microporous membrane in TiO 2 Precursor solution, and then transferred to the hydrothermal reaction kettle for hydrothermal reaction, after washing and drying, PPS@TiO 2 photocatalytic film. This method adopts high temperature hydrothermal method to convert TiO 2 In situ growth on the surface of the PPS microporous membrane to enhance TiO 2 The crystallinity of nanoparticles can obtain uniform pore size, high porosity, large specific surface area, high loading capacity, high catalyst crystallinity, firm combination, surface with controllable morphology and nano-loaded inside the channel without using binders. TiO 2 The PPS photocatalytic film effectively improves the specific surface area and catalytic activity of the catalyst.

Description

technical field [0001] The invention belongs to the field of photocatalytic film preparation, specifically a kind of loaded TiO 2 Preparation method of PPS photocatalytic film. Background technique [0002] Organic pollutants are one of the most difficult environmental pollutants to deal with because of their stable structure and difficult biodegradation. Semiconductor photocatalysis technology can directly use light energy to completely mineralize and remove various organic pollutants, and is one of the ideal organic pollutant treatment technologies. In semiconductor materials, nano-TiO 2 With the characteristics of high efficiency, environmental protection, non-toxicity and stability, it has received extensive attention. However, nano-TiO 2 Photocatalytic materials have disadvantages such as difficult recycling and easy agglomeration, which may easily cause secondary pollution and reduce catalytic efficiency. Therefore, supported photocatalytic materials have been use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38C02F1/30
CPCB01J31/38B01J35/004B01J35/065C02F1/30C02F2101/308C02F2305/10
Inventor 韩娜杨焯王卫静张文昕夏博伦
Owner TIANJIN POLYTECHNIC UNIV
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