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Houghite photocatalyst based on visible light response and preparation method thereof

A technology of talc light and visible light, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low activity, poor light corrosion resistance, and limited visible light catalytic materials Application and development issues, to achieve the effect of excellent performance, low cost, and easy mass production

Inactive Publication Date: 2011-09-07
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently developed visible light photocatalysts mainly focus on CdS, CdSe, WO 3 , Fe 2 o 3 However, due to its poor photocorrosion resistance and low activity, the application and development of visible light catalytic materials are greatly limited.

Method used

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  • Houghite photocatalyst based on visible light response and preparation method thereof
  • Houghite photocatalyst based on visible light response and preparation method thereof
  • Houghite photocatalyst based on visible light response and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Preparation of interlayer anion as NO by nucleation crystallization isolation method 3 - The hydrotalcite colloid:

[0021] a. 0.045mol solid Cu(NO 3 ) 2 ·3H 2 O and 0.0225mol of solid Cr(NO 3 ) 3 9H 2 O dissolved in 45mL to remove CO 2 of deionized water;

[0022] b. Dissolve 0.135mol of NaOH in 45mL to remove CO 2 of deionized water;

[0023] c. Add the above two mixed solutions prepared by step a and step b into the rotary liquid film reactor at the same time, adjust the slit width between the reactor rotor and the stator to be 2mm, the operating voltage is 85V, the rotor speed is 5000rpm, and the rotation time 2min;

[0024] 2. Add the obtained hydrotalcite colloid into the reaction kettle, crystallize at 120°C for 24 hours, take it out, cool it to room temperature, wash it thoroughly with deionized water until the pH of the supernatant is 7, and store it at 60°C After drying for 12 hours and grinding, a hydrotalcite photocatalyst based on visible lig...

Embodiment 2

[0028] 1. Preparation of interlayer anion as NO by nucleation crystallization isolation method 3 - The hydrotalcite colloid:

[0029] a. 0.05mol solid Ni (NO 3 ) 2 ·6H 2 O and 0.025mol of solid Cr(NO 3 ) 3 9H 2 O dissolved in 120mL to remove CO 2 of deionized water;

[0030] b. Dissolve 0.35mol NaOH in 100mL to remove CO 2 of deionized water;

[0031] c. Add the above two mixed solutions prepared by step a and step b into the rotary liquid film reactor at the same time, adjust the slit width between the reactor rotor and the stator to be 2mm, the operating voltage is 85V, the rotor speed is 5000rpm, and the rotation time 2min;

[0032]2. Add the obtained hydrotalcite colloid into the reaction kettle, crystallize at 120°C for 24 hours, take it out, cool it to room temperature, wash it thoroughly with deionized water until the pH of the supernatant is 7, and store it at 60°C After drying for 12 hours and grinding, a hydrotalcite photocatalyst based on visible light r...

Embodiment 3

[0036] 1. Preparation of interlayer anion as NO by nucleation crystallization isolation method 3 - The hydrotalcite colloid:

[0037] a. 0.072mol solid Zn(NO 3 ) 2 ·6H 2 O and 0.036mol of solid Cr(NO 3 ) 3 9H 2 O dissolved in 60mL to remove CO 2 of deionized water;

[0038] b. Dissolve 0.24mol NaOH in 80mL to remove CO 2 of deionized water;

[0039] c. Add the above two mixed solutions prepared by step a and step b into the rotary liquid film reactor at the same time, adjust the slit width between the reactor rotor and the stator to be 2mm, the operating voltage is 85V, the rotor speed is 5000rpm, and the stirring time 2min;

[0040] 2. Add the obtained hydrotalcite colloid into the reaction kettle, crystallize at 120°C for 24 hours, take it out, cool it to room temperature, wash it thoroughly with deionized water until the pH of the supernatant is 7, and store it at 60°C After drying for 12 hours and grinding, a hydrotalcite photocatalyst based on visible light re...

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Abstract

The invention discloses a houghite photocatalyst based on visible light response and a preparation method thereof, belonging to the technical field of preparation of photocatalysts. A series of houghite photocatalysts with response under visible light are synthesized by adopting a nucleation / crystallization separation method. By adjusting and controlling the composition of metal and interlaminar guest ions, a series of photocatalysts with excellent performance and full spectrum absorption under visible light can be obtained. The series of catalysts have very high absorption, can make full use of visible light part of sunlight, have high dye photocatalysis performance, can be applied to photocatalytic degradation of environmental pollutants, and have photocatalytic performance greatly superior to that of the conventional P25TiO2 photocatalyst. The photocatalyst produced by adopting the preparation method has low cost and simple process, is easy and convenient to operate, and is easy for mass production.

Description

technical field [0001] The invention belongs to the technical field of photocatalyst preparation, in particular to a hydrotalcite photocatalyst based on visible light response and a preparation method thereof. Background technique [0002] The use of photocatalyst technology to purify the environment is a "green and environmentally friendly technology". It makes full use of solar energy and under the action of photocatalysts, it can effectively remove harmful substances in the air, degrade VOC (formaldehyde, benzene series and other pollutants), and directly Photocatalytic splitting of water to produce hydrogen and degradation of water pollutants (dye, phenol) have become research hotspots in the academic and industrial circles of various countries. At present, the chemically stable titanium dioxide oxide is used as the research object, because it can only absorb the ultraviolet light part (5%) of solar energy, and its wide industrial application is greatly limited. There i...

Claims

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Application Information

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IPC IPC(8): B01J23/86B01J23/26
Inventor 卫敏赵宇飞田蕾段雪
Owner BEIJING UNIV OF CHEM TECH
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