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Bismuth copper sulfoxide and/or its composite material and its preparation method and application, equipment and method for photocatalytic degradation of formaldehyde affected by temperature

A composite material and photocatalytic technology, which is applied in the field of photocatalytic degradation of formaldehyde, can solve problems such as low catalytic efficiency, TiO2 failure, and needs to be improved.

Active Publication Date: 2021-01-26
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However TiO 2 It can only absorb and utilize light in the ultraviolet region, and neither the living room nor the office can get sufficient light to stimulate its catalytic formaldehyde
In addition, due to the presence of environmental factors such as moisture, it will cause TiO 2 Ineffective, low catalytic efficiency
[0003] Therefore, the existing technology for photocatalytic degradation of formaldehyde still needs to be improved.

Method used

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  • Bismuth copper sulfoxide and/or its composite material and its preparation method and application, equipment and method for photocatalytic degradation of formaldehyde affected by temperature
  • Bismuth copper sulfoxide and/or its composite material and its preparation method and application, equipment and method for photocatalytic degradation of formaldehyde affected by temperature
  • Bismuth copper sulfoxide and/or its composite material and its preparation method and application, equipment and method for photocatalytic degradation of formaldehyde affected by temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Catalytic degradation of formaldehyde by bismuth copper sulfide-gold nanocomposites prepared under the condition of pH 7 in the presence of light and temperature gradient:

[0076] Weigh 2.4g bismuth nitrate and mix with 60mL deionized water, stir for 10 minutes, add 2.6g copper nitrate powder, stir for 10 minutes until the solution turns blue. After adding 1.6 g of NaOH, stir until flocculation, and then continue to stir for 10 minutes. 1 g of thiourea was added to the solution and a brown solution was obtained after stirring for 10 minutes. The pH of the solution was adjusted to 7 by adding NaOH, then transferred to a hydrothermal reaction kettle, heated to 160° C., and kept for 12 hours. After repeated washing and drying three times, BiCuSO (bismuth copper oxysulfide) powder was obtained.

[0077] Weigh 0.2 g of the above-mentioned BiCuSO powder and 0.05 g of gold tetrachloride powder, add 50 mL of deionized water, and stir for 10 minutes. NaOH was added to adjust...

Embodiment 2

[0081] Catalytic degradation of formaldehyde by bismuth copper sulfide-gold nanocomposites prepared under the condition of pH 7 in the presence of light:

[0082] The preparation method of the bismuth copper oxysulfide-gold nanocomposite is the same as in Example 1.

[0083] Weigh 0.100 g of the above-mentioned bismuth-copper-sulfur-oxygen-gold nanocomposite material and place it on the sample tank of the heating plate, evenly tile an area of ​​2.0 cm×1.2 cm, put the heating plate into a 12.5 L glass bottle (Shu Niu), Inject 120mL of formaldehyde gas. Turn on the simulated sunlight xenon lamp light source (Microsolar300 Beijing Bofeilai Technology Co., Ltd.), respectively, when irradiating the heating plate for 10 minutes and 30 minutes (illumination parameters: light control mode, current 13.2-13.3A, display light intensity 546), with built-in A large bubble absorption tube with 5mL of absorption solution (Laoying 9011 Qingdao Zhongruineng Instrument Co., Ltd.) collects the ...

Embodiment 3

[0090] Catalytic degradation of formaldehyde by bismuth copper sulfide-gold nanocomposites prepared under the condition of pH 7.5 in the presence of light and temperature gradient:

[0091] Weigh 2.4g bismuth nitrate and mix with 60mL deionized water, stir for 10 minutes, add 2.6g copper nitrate powder, stir for 10 minutes until the solution turns blue. After adding 1.6 g of NaOH, stir until flocculation, and then continue to stir for 10 minutes. 1 g of thiourea was added to the solution and a brown solution was obtained after stirring for 10 minutes. The pH of the solution was adjusted to 7.5 by adding NaOH, then transferred to a hydrothermal reaction kettle, heated to 160° C., and kept for 12 hours. After repeated washing and drying three times, BiCuSO (bismuth copper oxysulfide) powder was obtained.

[0092] Weigh 0.2 g of the above-mentioned BiCuSO powder and 0.05 g of gold tetrachloride powder, add 50 mL of deionized water, and stir for 10 minutes. NaOH was added to ad...

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Abstract

The present invention provides bismuth copper oxysulfide and / or its composite material and its preparation method and application, equipment and method for photocatalytic degradation of formaldehyde affected by temperature, the bismuth copper sulfoxide and / or its composite material can fully absorb visible light, thereby It can efficiently catalyze the degradation of formaldehyde without external light source, and can be effectively used for the catalytic degradation of formaldehyde in various occasions, especially for the catalytic degradation of indoor formaldehyde. It can be reused many times, has good stability, and has a broad market prospect.

Description

technical field [0001] The invention relates to the technical field of air purification, in particular, to bismuth copper oxysulfide and / or its composite material, its preparation method and application, and a device and method for photocatalytic degradation of formaldehyde influenced by temperature. Background technique [0002] At present, the commonly used material for photocatalytic degradation of formaldehyde is TiO 2 . However TiO 2 It can only absorb and utilize light in the ultraviolet region. Whether it is a bedroom or an office, it cannot get enough light to stimulate its catalytic formaldehyde. In addition, due to the presence of environmental factors such as moisture, it will cause TiO 2 Ineffective, low catalytic efficiency. [0003] Therefore, the existing technology for photocatalytic degradation of formaldehyde still needs to be improved. Contents of the invention [0004] The present invention aims to solve one of the technical problems in the related...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/02B01D53/86B01D53/72
CPCB01D53/007B01D53/8668B01J27/02B01D2259/4508B01D2259/802B01D2257/704B01J35/39
Inventor 林元华罗屹东南策文
Owner TSINGHUA UNIV