Preparation method for titanium dioxide nanocrystal/carbon composite photocatalyst

A nanocrystal, titanium dioxide technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of poor stability, nanocrystal composite, complex preparation methods, etc., and achieve high crystal stability. , the effect of increased photocatalytic performance and easy availability of raw materials

Inactive Publication Date: 2013-10-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems in the prior art that the preparation method is complicated and it is difficult to prepare TiO 2 Nanocrystals are compounded into porous carbon matrix, and the problem of poor stability, and the preparation method of titanium dioxide nanocrystals / carbon composite photocatalyst provided

Method used

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  • Preparation method for titanium dioxide nanocrystal/carbon composite photocatalyst
  • Preparation method for titanium dioxide nanocrystal/carbon composite photocatalyst
  • Preparation method for titanium dioxide nanocrystal/carbon composite photocatalyst

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specific Embodiment approach 1

[0022] Specific embodiment 1: The method for preparing titanium dioxide nanocrystal / carbon composite photocatalyst of this embodiment is specifically carried out according to the following steps:

[0023] 1. Mix titanate and acrylic monomer, magnetically stir for 5h-30h to obtain a mixture, wherein the ratio of the amount of titanate and acrylic monomer is 1:1-10;

[0024] 2. Control the temperature to 70°C, mix the azobisisobutyronitrile and the mixture obtained in step one uniformly, and keep it for 10 to 50 minutes to obtain a prepolymer;

[0025] 3. The prepolymer obtained in step 2 is reacted at a temperature of 70°C for 10h-30h, then at a temperature of 80°C for 0.5h-10h, and then at a temperature of 90°C for 0.5h-10h, Then react at a temperature of 100°C for 0.5h-10h, and then react at a temperature of 120°C for 0.5h-20h to obtain a polymer;

[0026] 4. The polymer obtained in step 3 is heated to a temperature of 900° C., and maintained under a nitrogen atmosphere for 0.5 h to ...

specific Embodiment approach 2

[0027] Specific embodiment two: this embodiment is different from specific embodiment one in that the titanate described in step one is isopropyl titanate, butyl titanate or tetrabutyl titanate. Others are the same as the first embodiment.

specific Embodiment approach 3

[0028] Specific embodiment three: This embodiment is different from specific embodiment one in that the acrylic monomer in step one is methacrylic acid, ethacrylic acid or dimethacrylic acid. Others are the same as the first embodiment.

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Abstract

The invention provides relates to a preparation method for a catalyst and discloses a preparation method for a titanium dioxide nanocrystal/carbon composite photocatalyst. The invention aims to overcome the problems of a complex preparation method, difficulty in compounding a TiO2 nanocrystal with a porous carbon matrix and poor stability in the prior art. The preparation method provided by the invention comprises the following steps: 1, mixing; 2, preparation of a prepolymer; 3, polymerization; and 4, maintenance in a nitrogen atmosphere. The method has the advantages of simple and easily practicable reactions, easily available raw materials, simple process and easy operation, can compound a TiO2 nanocrystal with a diameter of 7 to 10 nm and good dispersion with a porous carbon matrix and is used for preparation of the titanium dioxide nanocrystal/carbon composite photocatalyst.

Description

Technical field [0001] The invention relates to a preparation method of a catalyst. Background technique [0002] Semiconductor photocatalysts have broad application prospects in the removal of organic hazardous pollutants in water and other fields. TiO 2 Due to its low cost, good photochemical stability, low toxicity and photoelectric conversion, it is currently the best material for solving various environmental problems. In TiO 2 Among the 3 crystal forms, the anatase crystal form has the highest photocatalytic performance. Contains mixed crystalline TiO 2 Than TiO with a single crystal form 2 Has higher catalytic activity; especially a mixture of anatase and rutile. [0003] Affect TiO 2 There are three main factors of photocatalytic performance: crystal type, size and light energy utilization. Particle size is a very important factor in the design of nanocrystalline photocatalysts. The reduction of particle size can increase the number of active points on the particle surf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J35/02
Inventor 崔放于静崔铁钰姚同杰
Owner HARBIN INST OF TECH
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