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Molecular-sieve-TiO2-loaded photocatalytic material and preparation method and application thereof

A photocatalytic material, molecular sieve technology, applied in molecular sieve catalysts, catalyst activation/preparation, chemical instruments and methods, etc., can solve the problems of difficult separation, difficult sedimentation, low density, etc., and achieve the effect of degrading COD

Active Publication Date: 2021-11-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nano-TiO 2 Although it has high photocatalytic activity, nano-TiO 2 The density is small, it is difficult to settle, and it is not easy to separate out in the suspension phase, which limits the nano-TiO 2 Practical Applications of Photocatalysts

Method used

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  • Molecular-sieve-TiO2-loaded photocatalytic material and preparation method and application thereof

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preparation example Construction

[0020] In the first aspect, the embodiment of the present invention provides a molecular sieve loaded TiO for sewage treatment 2 The preparation method of photocatalytic material, see figure 1 , nano-TiO was impregnated 2 Loaded on molecular sieves, the preparation method comprises the following steps:

[0021] Step 1, nano-TiO 2 The powder is dispersed in distilled water at a solid-to-liquid ratio of 1:5-20, then add 0.05molL -1 (NaPO 3 ) 6 Dispersant solution, AlPO 4 binder. Nano-TiO 2 The crystal form is anatase type, the size is 5-150nm, (NaPO 3 ) 6 The amount of dispersant is 1-10% of the volume of distilled water, AlPO 4 The amount of binder is nano TiO 2 1%-5% of the total mass of powder.

[0022] Step 2, adopt the method for strengthening mass transfer to make the nano-TiO in step 1 2 The powder is evenly dispersed in the solution until no coagulated particles can be observed with the naked eye to obtain nano-TiO 2 A dispersion in which the powder is unif...

Embodiment 1

[0031] A molecular sieve loaded TiO for sewage treatment 2 The preparation method of photocatalytic material, see figure 1 .

[0032] (1), the nano-TiO of 30g 2 Disperse in distilled water with a solid-to-liquid ratio of 1:10, then add 0.05mol L -1 (NaPO 3 ) 6 Dispersant solution, AlPO 4 binder. Nano-TiO 2 The size is 10-25nm, (NaPO 3 ) 6 The amount of dispersant is 5% of the volume of distilled water, AlPO 4 The amount of binder is nano TiO 2 4% of mass.

[0033] (2), the method of high-shear emulsifier dispersion is used to enhance mass transfer, so that nano-TiO 2 Disperse evenly in the solution until no coagulated particles can be observed with the naked eye.

[0034] (3), immerse the pretreated molecular sieve in nano TiO 2 Catalyst powder mixed liquid, and then ultrasonically vibrate the mixed liquid with an ultrasonic generator to completely and uniformly disperse the particles in the mixed liquid, soak and age for 2 hours. The amount of molecular sieve a...

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Abstract

The invention discloses a molecular-sieve-TiO2-loaded photocatalytic material and a preparation method and application thereof. The preparation method comprises the following steps: impregnating a molecular sieve into a nano TiO2 uniform dispersion liquid by adopting an impregnation method, then taking out the molecular sieve loaded with nano TiO2, and roasting to obtain the molecular-sieve-TiO2-loaded photocatalytic material, wherein the nano TiO2 uniform dispersion liquid is prepared by the following steps: dispersing nano TiO2 powder, a dispersing agent and a binding agent in water, and uniformly dispersing the nano TiO2 powder in the solution by adopting an enhanced mass transfer method. According to the preparation method, nano TiO2 powder is taken as a raw material, anatase type nano TiO2 with good photocatalytic performance is loaded on a molecular sieve carrier, and the easy-to-recover TiO2-loaded photocatalytic material for sewage treatment is prepared, so htat heavy metal ions in industrial sewage can be degraded, and COD in the industrial sewage can be degraded.

Description

technical field [0001] The invention relates to the technical field of catalyst materials, in particular to a molecular sieve loaded TiO 2 Photocatalytic materials and their preparation methods and applications. Background technique [0002] In the case of global water scarcity, sewage treatment has become an important problem to be solved urgently, and the development of sewage treatment technology is imminent. Photocatalytic technology is a green, environmentally friendly and sustainable process with semiconductor photocatalytic materials as the core, and is one of the main ways to utilize solar energy. At present, many scholars have reported that the use of photocatalytic technology can degrade organic matter, heavy metal ions and other pollutants in sewage. Under the irradiation of light, semiconductor photocatalytic materials can absorb and utilize photons of specific wavelengths in sunlight that match the energy band structure of semiconductor materials, so that they...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J29/00B01J35/00B01J37/00B01J37/02C02F1/30C02F101/20
CPCB01J21/063B01J29/00B01J37/0018B01J37/0201C02F1/30C02F2101/20C02F2305/10B01J35/39Y02W10/37
Inventor 李程王敬楠崔新安蒋兴家王雪
Owner CHINA PETROLEUM & CHEM CORP
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