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BiOCl-TiO2/diatomite photocatalyst and preparation method thereof

A technology of photocatalyst and diatomite, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc. It can solve problems such as difficult recovery, easy agglomeration of simple catalysts, and difficult operation of the reaction process.

Active Publication Date: 2016-08-17
浙江库实健康科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium tetrachloride used in the preparation process of the preparation method is extremely easy to hydrolyze, and the reaction process is not easy to operate
Chinese patent document CN103464183A (application number 201310421586.4) discloses a rutile phase TiO 2 / BiOCl nano photocatalyst powder preparation method, its and literature (1) (Wang Lei, Wang Zhijun, Wang Yuting, et al.BiOCl / TiO 2 Research on Visible Light Activity and Mechanism of Composite Materials. Journal of Environmental Science, 2015,35(1):222-228.) are only BiOCl and TiO 2 The simple combination of the two does not solve the problems of easy agglomeration and difficult recovery of simple catalysts

Method used

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  • BiOCl-TiO2/diatomite photocatalyst and preparation method thereof
  • BiOCl-TiO2/diatomite photocatalyst and preparation method thereof
  • BiOCl-TiO2/diatomite photocatalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0016] The specific implementation steps are as follows:

[0017] (1) Dissolve 0.52g of bismuth nitrate pentahydrate in 2mol / L nitric acid, add 1g of diatomaceous earth, stir evenly, weigh 0.10g of potassium chloride and dissolve in water, slowly add to the above pulp solution, adjust the solution with ammonia water pH=7, after stirring for 2 hours, the precipitate was filtered, washed, and dried at 105°C to obtain a BiOCl-diatomaceous earth sample.

[0018] (2) Take 14 mL of absolute ethanol, add the BiOCl-diatomite sample obtained in step (1), stir for 30 min to form a homogeneous suspension, add 1 mL of glacial acetic acid, stir for 30 min, add 3 mL of tetrabutyl titanate, and stir for 1 h A mixed solution of 6 mL of water and 6 mL of ethanol (adjusted to pH=2.0 with hydrochloric acid) was added to the above suspension, and peptized at room temperature for 12 h.

[0019] (3) The dried sample obtained in the above steps was calcined at 500° C. for 2 hours, and the heating r...

Embodiment 2

[0022] Same as step in embodiment 1, difference is: the add-on of bismuth nitrate pentahydrate is 0.78g in the step (1), and the add-on of potassium chloride is 0.15g; In the step (2), the source of titanium is changed into tetraiso The addition amount of titanium propoxide and titanium tetraisopropoxide is 2 mL; in step (3), the calcination temperature is 600° C., and the calcination time is 3 hours.

Embodiment 3

[0024] Identical with step in embodiment 1, difference is: the add-on of bismuth nitrate pentahydrate is 0.91g in the step (1), and chlorine source changes sodium chloride into, and the add-on of sodium chloride is 0.17g; Step (2 ) in an amount of tetrabutyl titanate added of 1.5 mL; in step (3), the calcination temperature was 700° C., and the calcination time was 1 h.

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Abstract

The invention relates to a BiOCl-TiO2 / diatomite photocatalyst and a preparation method thereof, belonging to the fields of nonmetal mine material deep processing and environmental engineering. The BiOCl-TiO2 / diatomite composite photocatalysis material with visible light response is obtained by taking diatomite as a catalyst carrier and loading a BiOCl-TiO2 heterojunction catalyst on the surface and in pore channels of diatomite through a sol-gel method and a calcination crystallization method. According to the method, diatomite and nano BiOCl-TiO2 heterojunction with visible light response are compounded, and the pollutant adsorption and capture performance of the material and the dispersity and photocatalysis activity of the catalyst are improved by virtue of diatomite carrier effect. The loading type photocatalysis material has excellent photocatalysis activity to gas formaldehyde and liquid dyes under visible light, and has great potential application value in the field of treatment of gas formaldehyde and liquid dyes.

Description

technical field [0001] The invention relates to a diatomite loaded BiOCl-TiO that can be used to degrade gas-phase formaldehyde and liquid-phase dyes 2 Heterojunction (BiOCl-TiO 2 The invention discloses a photocatalyst and a preparation method thereof, which belong to the field of deep processing of non-metallic mineral materials and environmental engineering. Background technique [0002] The rapid economic development has produced many environmental pollution problems, among which water pollution and air pollution are particularly serious. Dye wastewater mainly comes from the printing, dyeing and textile industries, and incomplete treatment will cause harm to domestic water and groundwater. Indoor environmental pollutants mainly include formaldehyde, benzene, toluene, etc. Formaldehyde is the most typical, which has the characteristics of long release cycle and difficult treatment. Long-term exposure will cause harm to the human respiratory, nervous and immune systems. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135
CPCB01J21/063B01J21/16B01J27/135B01J35/39
Inventor 孙志明郑水林张广心姚光远李春全
Owner 浙江库实健康科技有限公司
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