Z-type catalyst with photothermal synergistic function and application thereof

A technology of photothermal synergy and catalyst, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of high Ag content, cumbersome operation, easy to be oxidized and deteriorated, and achieve good thermal stability The effect of high stability, simple preparation conditions, and easy reuse

Active Publication Date: 2018-09-28
SUN YAT SEN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Although the catalytic materials prepared by the above-mentioned methods reported in the literature have high catalytic performance, there are still some problems, such as SrTiO 3 /TiO 2 The synthesis process requires a long hydrothermal time, the cost is high and the operation is cumbersome, and ammonia gas is easily generated during the synthesis process to pollute the environment.
Although the heterojunction structure helps to inhibit the recombination of photogenerated electrons and holes, its redox ability is not very strong, and the external temperat

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  • Z-type catalyst with photothermal synergistic function and application thereof
  • Z-type catalyst with photothermal synergistic function and application thereof

Examples

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Example Embodiment

[0028] Example 1

[0029] A Z-type AgBr / Ag / SrTiO for photothermal synergistic catalytic degradation of toluene 3 -TiNT catalyst preparation method: (1) Take 0.3g of TiO 2 The nanotube array (TiNT) was put into 20mL of deionized water to form a suspension; (2) 0.425g of Sr(OH) 2 Dissolve in 40mL deionized water, then add to the suspension of step (1), and continue to stir; (3) subject the mixed suspension to hydrothermal treatment at a temperature of 200℃ for 5h; take out the sample and use deionized Centrifuge the water with a speed of 5000 revolutions / min and a time of 5 min for 3 times. Finally, it was placed in an oven at 70°C and dried for 10 hours; (4) The sample obtained in step (3) was placed in a crucible at 500°C. SrTiO is obtained by calcination at a constant temperature for 5h in an air atmosphere 3 -TiNT heterojunction; (5) take 1g of SrTiO 3 -Put TiNT in 30mL of deionized water; (6) Take 0.904g of AgNO 3 Dissolve in 50mL of deionized water, add dropwise to the suspens...

Example Embodiment

[0030] Example 2

[0031] A Z-type AgBr / Ag / SrTiO for photothermal synergistic catalytic degradation of toluene 3 -TiNT catalyst preparation method: (1) Take 0.3g of TiO 2 The nanotube array (TiNT) was put into 20mL of deionized water to form a suspension; (2) 0.425g of Sr(OH) 2 Dissolve in 40mL of deionized water, then add to the suspension of step (1), and continue to stir; (3) subject the mixed suspension to hydrothermal treatment at a temperature of 150°C for 2h; take out the sample and use deionized Centrifuge the water at a speed of 3000 revolutions / min and a time of 5 min for 3 times. Finally, it was placed in an oven at 70°C for 10 hours; (4) The sample obtained in step (3) was placed in a crucible at 500°C. SrTiO is obtained by calcination at a constant temperature for 5h in an air atmosphere 3 -TiNT heterojunction; (5) take 1g of SrTiO 3 -TiNT is put into 30mL of deionized water; (6) Take 0.904g of AgNO 3 Dissolve in 50mL of deionized water, add dropwise to the suspension...

Example Embodiment

[0032] Example 3

[0033] A Z-type AgBr / Ag / SrTiO for photothermal synergistic catalytic degradation of toluene 3 -TiNT catalyst preparation method: (1) Take 0.3g of TiO 2 The nanotube array (TiNT) was put into 20mL of deionized water to form a suspension; (2) 0.425g of Sr(OH) 2 Dissolve in 40mL deionized water, then add to the suspension of step (1), and continue to stir; (3) subject the mixed suspension to hydrothermal treatment at a temperature of 200℃ for 5h; take out the sample and use deionized Centrifuge the water at a speed of 5000 rpm and a time of 5 min for 3 times, and finally place it in an oven at 70°C for 10 hours; (4) Place the sample obtained in step (3) in a crucible at 400°C Calcined at a constant temperature for 2h in an air atmosphere to obtain SrTiO 3 -TiNT heterojunction; (5) take 1g of SrTiO 3 -Put TiNT in 30mL of deionized water; (6) Take 0.904g of AgNO 3 Dissolve in 50mL of deionized water, add dropwise to the suspension of step (5), and continue to stir; (...

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Abstract

The invention discloses a Z-type catalyst with a photothermal synergistic function and application thereof. The Z-type catalyst AgBr/Ag/SrTiO3-TiNT consists of SrTiO3 (strontium titanat), TiO2 (titanium dioxide) nanotube array, AgBr (silver bromide) and Ag (silver). The Z-type catalyst can be applied to the photothermal synergistic catalyzing, higher catalyzing activity is obtained at lower reaction temperature, the good thermal stability is realized, and the repeated utilization is conveniently realized; the noble metal (Ag) is used as an electron transmitter to form the Z-type catalyst, so as to effectively accelerate the separating of photoelectron cavity pairs and transfer of electrons in the catalyst, showing the broader spectrum response and higher separating efficiency of photon-generated carriers, and improve the stability and oxidation-reduction ability of the catalyst. The Z-type catalyst has the advantages that the preparation conditions are simple, the cost is lower, and the Z-type catalyst is suitable for industrialized production.

Description

technical field [0001] The invention relates to a Z-type catalyst with photothermal synergistic effect and its application in photothermal synergistic degradation of organic gas pollutants, belonging to the technical field of catalytic materials and environmental protection. Background technique [0002] Volatile organic compounds (VOCs) can cause serious damage to human health and the environment. In recent years, technologies related to the degradation of VOCs mainly include photocatalysis and thermal catalysis. Among them, the core of photocatalytic technology is mainly to use photocatalyst to absorb light energy at room temperature to generate active groups, thereby catalytically degrading VOCs. However, due to its low utilization rate of light energy, low quantum efficiency and poor catalyst stability, it is difficult for this technology to be used in large-scale industrial production. Compared with photocatalytic technology, although thermocatalytic technology has hi...

Claims

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Application Information

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IPC IPC(8): B01J27/138B01D53/86B01D53/72B01D53/74
CPCB01D53/005B01D53/007B01D53/8668B01J27/138B01J35/004
Inventor 芮泽宝纪韦康申婷周贤太刘帅
Owner SUN YAT SEN UNIV
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