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Preparation method of rare earth element co-doped nano titanium dioxide photocatalyst

A nano-titanium dioxide and rare earth element technology, applied in the field of photocatalyst, can solve problems such as affecting the photocatalytic efficiency, and achieve the effects of suppressing electron-hole pair recombination, abundant raw material sources, and low production cost

Active Publication Date: 2016-11-09
吕浩然
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at the nanometer size, more electron-hole pairs are formed, but the corresponding electron-hole pairs cannot be avoided to recombine, thus affecting the substantial photocatalytic efficiency.

Method used

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  • Preparation method of rare earth element co-doped nano titanium dioxide photocatalyst

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Effect test

Embodiment 1

[0027] A preparation method of rare earth element co-doped nano-titanium dioxide photocatalyst, which comprises the following steps:

[0028] (1), the titanium nitride powder of 80 weight parts is mixed with the sodium peroxide of 80 weight parts, the titanium nitride powder after mixing and peroxide mixture are added in the reactor that contains 100 weight parts water, the mixture is in Stir and mix evenly in the reaction kettle, and react in the reaction kettle at a constant temperature and equal volume for 6 hours at 200°C. After the reaction, the product in the reaction kettle is centrifuged, and the obtained precipitate is centrifugally washed, and the washed precipitate is dried. After drying, black nano titanium dioxide powder is obtained;

[0029] (2), adding 10 parts by weight of rare earth oxides into the cerium hydrochloric acid solution, stirring at a constant speed in a stirring device, to obtain a rare earth hydrochloric acid solution with a concentration of 0.1%...

Embodiment 2

[0033] A preparation method of rare earth element co-doped nano-titanium dioxide photocatalyst, which comprises the following steps:

[0034] (1), the titanium nitride powder of 50 weight parts is mixed with the sodium peroxide of 100 weight parts, the titanium nitride powder after mixing and peroxide mixture are added in the reactor that contains 150 weight parts water, the mixture is Stir and mix evenly in the reaction kettle, and react in the reaction kettle at a constant temperature and equal volume for 4 hours at 150°C. After the reaction, the product in the reaction kettle is centrifuged, and the obtained precipitate is centrifugally washed, and the washed precipitate is dried. After drying, black nano titanium dioxide powder is obtained;

[0035] (2), adding 8 parts by weight of rare earth oxides into the sulfuric acid solution of praseodymium salt and samarium salt, stirring at a constant speed in a stirring device, to obtain a rare earth hydrochloric acid solution wit...

Embodiment 3

[0039] A preparation method of rare earth element co-doped nano-titanium dioxide photocatalyst, which comprises the following steps:

[0040] (1), the titanium nitride powder of 10 weight parts is mixed with the sodium peroxide of 70 weight parts, the titanium nitride powder after mixing and peroxide mixture are added in the reactor that contains 300 weight parts water, the mixture is in Stir and mix evenly in the reaction kettle, and react in the reaction kettle at a constant temperature and equal volume for 6 hours at 220 ° C. After the reaction, the product in the reaction kettle is centrifuged, and the obtained precipitate is centrifugally washed. After drying, black nano titanium dioxide powder is obtained;

[0041] (2), 1 weight part of rare earth oxide is added in the phosphoric acid solution of neodymium salt and promethium salt, and stirred at a constant speed in a stirring device to obtain a rare earth hydrochloric acid solution with a concentration of 0.1%-0.5%;

...

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Abstract

The invention discloses a preparation method of a rare earth element co-doped nano titanium dioxide photocatalyst. The rare earth element is embedded into self-doped titanium dioxide to obtain the rare earth element co-doped nano titanium dioxide photocatalyst with certain morphology. The preparation method is simple and low at cost, and uses the photoelectric characteristics of rare earth element to prepare the titanium dioxide rare earth element co-doped nano titanium dioxide photocatalyst, which has the advantages of controllable doping, good dispersion, efficient energy storage and high catalytic activity. The purpose of the invention is to provide a simple and low-cost preparation method, which uses self-doped black TiO2 as the base and sets the rare earth element co-doping as customized purpose; and the method can prepare the rare earth element co-doped nano titanium dioxide photocatalyst with high catalytic activity.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, and in particular relates to a preparation method of a rare earth element co-doped nano-titanium dioxide photocatalyst. Background technique [0002] Light on TiO 2 The catalysis to promote the chemical reaction was first discovered by Mr. Fujishima, the current professor of the Graduate School of Engineering at the University of Tokyo, and it was called the "Fujishima effect" at that time. Nearly 50 years have passed since its discovery, and countries all over the world have paid attention to TiO 2 And a series of other photocatalyst application researches are getting more and more in-depth. The results of the study found that as a photocatalyst reaction only occurs on the surface of the photocatalyst, the substances adsorbed (contacted) on the surface react with strong oxidizing free radicals, which are only effective for organisms with extremely small molecules (such as: bacteria, Vi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J21/06
CPCB01J21/063B01J23/10B01J35/39
Inventor 吕浩然
Owner 吕浩然
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