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Diatomite-loaded lanthanum-doping nano bismuth oxychloride composite material as well as preparation method and application thereof

A technology of bismuth oxychloride and composite materials, applied in chemical instruments and methods, catalyst activation/preparation, separation methods, etc., can solve the problems of difficulty in obtaining supported nano-BiOCl thin films, poor catalytic effect, and high production costs, and achieves an increase in the number, The effect of prolonging life and promoting migration

Active Publication Date: 2019-01-18
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high production costs of sol-gel and vapor deposition methods, it is difficult to obtain nano-BiOCl films with uniform loading and high catalytic activity by impregnation methods and mixed preparation methods, and the bandgap energy of BiOCl is between 3.20 and 3.50eV. Visible light The photocatalytic effect is poor, so it is the general trend to study new preparation methods

Method used

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  • Diatomite-loaded lanthanum-doping nano bismuth oxychloride composite material as well as preparation method and application thereof
  • Diatomite-loaded lanthanum-doping nano bismuth oxychloride composite material as well as preparation method and application thereof
  • Diatomite-loaded lanthanum-doping nano bismuth oxychloride composite material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0035] A preparation method of a diatomite-supported lanthanum-doped nano-bismuth oxychloride composite material, specifically comprising the following steps:

[0036] S1. Wet and ultra-finely grind diatomite to a median particle size of 3.2 μm, then dry at 105°C for 5 hours until the moisture content of diatomite is less than 0.5%, and then disperse to obtain diatomite concentrate;

[0037] S2. Add 6 g of the diatomite obtained in S1 and 180 mL of distilled water into the reaction vessel (so that the water is immersed in the diatomite), and slowly drop in 30 mL of BiCl with a concentration of 2 mol / L under stirring. 3Aqueous solution, then drop into the mixed solution of ammonium sulfate solution and concentrated hydrochloric acid (the amount of ammonium sulfate solution is 6.4mL, the amount of concentrated hydrochloric acid is 2.9mL), continue to stir for 5min, and then react at 20°C for 0.5h (make BiCl 3 Hydrolyzed into fine hydrated BiOCl particles and precipitated on the ...

Embodiment 2

[0040] A preparation method of a diatomite-supported lanthanum-doped nano-bismuth oxychloride composite material, specifically comprising the following steps:

[0041] S1. Wet and ultra-finely grind diatomite to a median particle size of 3.6 μm, then dry at 110° C. for 3 hours until the moisture content of diatomite is less than 0.5%, and then disperse to obtain diatomite concentrate;

[0042] S2. Add 10 g of the diatomite obtained in S1 and 300 mL of distilled water into the reaction vessel (so that the water is submerged in the diatomite), and slowly drop in 36 mL of BiCl with a concentration of 2 mol / L under stirring. 3 Aqueous solution, then drip the mixed solution of ammonium sulfate solution and concentrated hydrochloric acid (wherein the addition amount of ammonium sulfate solution is 12.3mL, the addition amount of concentrated hydrochloric acid is 7.2mL), continue stirring for 8min, then react at 60°C for 1.5h (make BiCl 3 Hydrolyzed into fine hydrated BiOCl particles...

Embodiment 3

[0045] A preparation method of a diatomite-supported lanthanum-doped nano-bismuth oxychloride composite material, specifically comprising the following steps:

[0046] S1. Wet and ultra-finely grind diatomite to a median particle size of 4.8 μm, then dry at 115° C. for 2 hours until the moisture content of diatomite is less than 0.5%, and then disperse to obtain diatomite concentrate;

[0047] S2. Add 12 g of the diatomite obtained in S1 and 360 mL of distilled water into the reaction vessel (so that the water is submerged in the diatomite), and slowly drop 48 mL of BiCl with a concentration of 2 mol / L under stirring. 3 Aqueous solution, then drop into the mixed solution of ammonium sulfate solution and concentrated hydrochloric acid (the amount of ammonium sulfate solution added is 8.9mL, the amount of concentrated hydrochloric acid added is 5.8mL), continue to stir for 10min, and then react at 95°C for 2.5h (make BiCl 3 Hydrolyzed into fine hydrated BiOCl particles and prec...

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Abstract

The invention discloses a diatomite-loaded lanthanum-doping nano bismuth oxychloride composite material as well as a preparation method thereof. The preparation method comprises the following steps: S1, grinding and drying diatomite, thus obtaining diatomite concentrate; S2, mixing the diatomite concentrate in step S1 and water, dropwise adding bismuth trichloride aqueous solution at a stirring state, then dropwise adding a mixed solution of ammonium sulfate solution and strong hydrochloric acid, and reacting for 0.5 to 2.5 hours at 20 to 95 DEG C, thus obtaining a reaction solution; and S3, adding a lanthanum nitrate aqueous solution into the reaction solution in S2, suction filtering, washing, drying, calcining for 2 to 4 hours at 450 to 750 DEG C, and finally obtaining a composite material. The invention also provides application of the composite material in eliminating indoor air pollutants. According to the preparation method disclosed by the invention, nanoscale La-BiOCl particles are loaded into pores and onto surfaces of the diatomite by virtue of a hydrolytic precipitation method to synthesize the La-BiOCl / diatomite composite material, and an excellent purification effectfor pollutants in the indoor air can be achieved.

Description

technical field [0001] The invention belongs to the technical field of inorganic composite material synthesis, and in particular relates to a diatomite-loaded lanthanum-doped nano-bismuth oxychloride composite material, a preparation method and an application. Background technique [0002] In recent years, with the development and progress of science and technology, people spend most of their time indoors. The quality of indoor air directly affects the health of the human body. With the development of the economy and the continuous improvement of people's living standards, everyone The requirements for indoor environment comfort are getting higher and higher. The upsurge of carrying out high-grade and fine decoration to indoor spaces such as houses, office buildings, and shopping malls that follows is in the ascendant. However, while the decoration makes the indoor environment comfortable and beautiful, it also causes the pollution of the indoor environment, which seriously...

Claims

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Application Information

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IPC IPC(8): B01J27/06B01J37/03B01D53/86B01D53/72
CPCB01D53/8668B01J27/06B01J37/031B01D2259/4508B01D2258/06B01D2257/708B01J35/39
Inventor 高如琴孙倩刘迪庞浩邵燕祥
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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