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A kind of cerium-doped nano-titanium dioxide photocatalyst and its pyrolysis preparation method

A nano-titanium dioxide and photocatalyst technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve obvious agglomeration phenomenon, high equipment requirements, complex methods, etc. problems, to achieve the effect of high purity, low equipment requirements, and simple and efficient methods

Active Publication Date: 2021-03-02
湘潭新云科技有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they generally have problems such as obvious reunion phenomenon, complicated methods, high requirements for equipment, long process, high cost and low efficiency.

Method used

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  • A kind of cerium-doped nano-titanium dioxide photocatalyst and its pyrolysis preparation method
  • A kind of cerium-doped nano-titanium dioxide photocatalyst and its pyrolysis preparation method
  • A kind of cerium-doped nano-titanium dioxide photocatalyst and its pyrolysis preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Add 42.64ml of glacial acetic acid and 21.28ml of butyl titanate into the reaction vessel, and stir with a glass rod while adding. Then, 0.27 g of cerium nitrate and 50 ml of ethanol were sequentially added to obtain a mixed solution.

[0037] (2) Put the obtained mixed solution into an ultrasonic oscillator, and ultrasonically vibrate twice, 20 minutes each time. Then, after heating and evaporating to dryness at a temperature of 110° C., the nano-titanium dioxide precursor powder doped with cerium is obtained.

[0038] (3) Put the obtained nano-titanium dioxide precursor powder doped with cerium into a muffle furnace, set the temperature at 120°C, dry it for 2 hours, place it in the muffle furnace, heat it up to 600°C, and keep it for 1.5 hours , keep the furnace closed, and cool down to room temperature to obtain nano-titanium dioxide doped with cerium. figure 1 It is an electron diffraction XRD pattern of the cerium-doped titanium dioxide powder obtained in thi...

Embodiment 2

[0040] (1) Add 40.764ml of glacial acetic acid and 20.382ml of butyl titanate into the reaction vessel, and stir with a glass rod while adding. Then, 0.7921 g of cerium nitrate and 55 ml of ethanol were sequentially added to obtain a mixed solution.

[0041] (2) Put the obtained mixed solution into an ultrasonic oscillator, and ultrasonically oscillate 3 times, 30 minutes each time. Then, it was heated and evaporated to dryness at 120° C. to obtain nano-titanium dioxide precursor powder doped with cerium.

[0042] (3) Put the obtained cerium-doped nano-titanium dioxide precursor powder into the muffle furnace, set the temperature at 120°C, dry it for 2 hours, place it in the muffle furnace, heat it up to 600°C, and keep it warm for 1 hour , keep the furnace closed, and cool down to room temperature to obtain nano-titanium dioxide doped with cerium. The obtained crystal form belongs to anatase type, and the degree of crystallization is good. Put it into sewage for photocatal...

Embodiment 3

[0044] (1) Add 39.06ml of glacial acetic acid and 19.53ml of butyl titanate into the reaction vessel, and stir with a glass rod while adding. Then, 1.29 g of cerium nitrate and 50 ml of ethanol were sequentially added to obtain a mixed solution.

[0045] (2) Put the obtained mixed solution into an ultrasonic oscillator, and ultrasonically oscillate 3 times, 30 minutes each time. Then, after heating and evaporating to dryness at 120° C., a cerium-doped nano-titanium dioxide precursor powder is obtained.

[0046] (3) The obtained cerium-doped nano-titanium dioxide precursor powder is put into a muffle furnace, the temperature is set at 120° C., dried for 2 hours, placed in the muffle furnace, the temperature is programmed to 600° C., and after 2 hours of heat preservation, Keep the furnace closed and cool down to room temperature to obtain nano-titanium dioxide doped with cerium. The obtained crystal form belongs to anatase type, and the degree of crystallization is good. Put...

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Abstract

The invention discloses a cerium-doped nano titanium dioxide photocatalyst and a high temperature decomposition preparation method thereof. In the present invention, the organic titanium ester is alcoholyzed under the protection of an organic acid, and then the cerium-containing salt is dissolved therein to prepare a uniform composite solution, and cerium-doped nano titanium dioxide is obtained through high temperature decomposition and sintering processes. The preparation method of the present invention has a simple process, is easy to achieve uniform doping of cerium ions, and can accurately control the doping amount of cerium ions. During the preparation process, cerium ions enter the crystal lattice and produce lattice distortion, thereby improving the optical properties of titanium dioxide. At the same time, the method of the present invention can accurately control the formation of the mixed crystal form of rutile and anatase, the single crystal form of anatase, and the ratio of the two crystal forms in the mixed crystal form, and has a good degree of crystallization. In actual production, due to low equipment requirements, short cycle, and low cost, industrialized mass production can be achieved.

Description

technical field [0001] The invention belongs to the field of photocatalytic material preparation, in particular to a cerium-doped nano-titanium dioxide photocatalyst and a high-temperature decomposition preparation method thereof. Background technique [0002] In recent years, in order to achieve rapid economic growth, a large number of factories have appeared, and people's living standards have been improved, but it has caused serious environmental problems. Problems such as air, soil, and water pollution have gradually become severe. In order to solve these problems, many researchers began to look for some non-toxic, low-cost, recyclable catalysts to decompose some organic pollutants. Therefore, environmentally friendly photocatalytic technology has been greatly developed, and nano-titanium dioxide is considered to be the most promising photocatalyst, and many researchers have conducted a lot of research. Nano-titanium dioxide is a new type of non-toxic and harmless inor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/10B01J37/03B01J37/08C02F1/30
CPCC02F1/30B01J23/002B01J23/10B01J37/033B01J37/082C02F2305/10C02F2209/08B01J35/393B01J35/23B01J35/39
Inventor 郭世柏张国辉易正翼许鑫王凯成
Owner 湘潭新云科技有限责任公司
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