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Photocatalytic gas-solid-liquid three-phase interface with adjustable wettability and preparation method and application thereof

A three-phase interface and catalytic gas technology, applied in chemical instruments and methods, light water/sewage treatment, oxidized water/sewage treatment, etc., can solve problems affecting three-phase interface contact and interface reaction, and improve the application effect Effect

Active Publication Date: 2020-04-21
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the wettability of the three-phase interface prepared in the prior art is fixed, and the wettability will affect the contact between the three-phase interface and the reactant, and then affect the interface reaction, thus providing a kind of wettability. Catalytic gas-solid-liquid three-phase interface is very important

Method used

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  • Photocatalytic gas-solid-liquid three-phase interface with adjustable wettability and preparation method and application thereof
  • Photocatalytic gas-solid-liquid three-phase interface with adjustable wettability and preparation method and application thereof
  • Photocatalytic gas-solid-liquid three-phase interface with adjustable wettability and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0040] A method for preparing a photocatalytic gas-solid-liquid three-phase interface with adjustable wettability, the steps of which are:

[0041] 1) Evenly disperse 100mg of photocatalyst titanium dioxide in 100mL of dispersion liquid H 2 O / EtOH(H 2 The volume ratio of O and EtOH is 1:10);

[0042] 2) Evenly drop the dispersed catalyst suspension on the 5×5cm 2 On the Toray carbon paper, the dropping rate is about 10mL per minute, and it is dried with infrared light;

[0043] 3) Transfer the above-mentioned dried sample to the reaction kettle, add 10 μL of (trifluoromethyl)trimethylsilane, under vacuum condition for 1-5min, and then react at 90-120°C for 30-60min;

[0044] 4) After the reaction, the obtained carbon paper is put into a physical plasma processor, and the plasma is treated for 0.5h, 1h, and 2h, and a photocatalytic gas-solid-liquid three-phase interface with controllable wettability can be obtained. They are denoted as three-phase interface 1, three-phase i...

Embodiment 2

[0047] A method for preparing a photocatalytic gas-solid-liquid three-phase interface with adjustable wettability, the steps of which are:

[0048] 1) Evenly disperse 100mg of photocatalyst titanium dioxide in 100mL of dispersion liquid H 2 O / EtOH((H 2 The volume ratio of O and EtOH is 1:5);

[0049] 2) Evenly drop the dispersed catalyst suspension on the 5×5cm 2 On the Gaoshi Ruilian carbon paper, the dropping rate is about 1mL per minute, and it is dried with infrared light;

[0050] 3) Transfer the above-mentioned dried sample to the reaction kettle, add 10 μL of tridecafluorooctyltriethoxysilane, under vacuum condition for 1-5min, and then react at 90-120°C for 30-60min;

[0051] 4) After the reaction, the obtained carbon paper was put into a physical plasma processor, and after plasma treatment for 1 h, a photocatalytic gas-solid-liquid three-phase interface with controllable wettability was obtained, which was denoted as three-phase interface 4 , the hydrophobic agen...

Embodiment 3

[0054] A method for preparing a photocatalytic gas-solid-liquid three-phase interface with adjustable wettability, the steps of which are:

[0055] 1) Evenly disperse 100mg of photocatalyst titanium dioxide in 100mL of dispersion liquid H 2 O / EtOH(H 2 The volume ratio of O and EtOH is 1:10);

[0056] 2) Evenly drop the dispersed catalyst suspension on the 5×5cm 2 On the Gaoshi Ruilian carbon paper, the dripping rate is about 10mL per minute, and it is dried with infrared light;

[0057] 3) Transfer the above-mentioned dried sample to the reaction kettle, add 10 μL of heptadecafluorodecyltrimethoxysilane, under vacuum condition for 1-5min, and then react at 90-120°C for 30-60min;

[0058] 4) After the reaction, the obtained carbon paper is placed in a physical plasma processor, and after plasma treatment for 0.5 h, a photocatalytic gas-solid-liquid three-phase interface with adjustable wettability can be obtained, which is recorded as the three-phase interface 5. The hydrop...

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Abstract

The invention discloses a photocatalytic gas-solid-liquid three-phase interface with adjustable wettability. The photocatalytic gas-solid-liquid three-phase interface comprises a hydrophobic carbon paper layer, a hydrophilic photocatalyst layer coated on a carbon paper, and a hydrophobic agent layer formed on the photocatalyst layer through grafting, wherein the hydrophobic agent layer is subjected to plasma treatment. In the application of the three-phase interface, the amount of water reaching the photocatalyst layer is regulated and controlled by regulating and controlling the wettability of the hydrophobic agent layer, so that the gas, the water and the photocatalyst layer reach a state beneficial to photocatalytic reaction, the photocatalytic reaction is promoted, and the applicationeffect of the three-phase interface in water treatment and sterilization is improved. Meanwhile, the invention further provides a preparation method of the three-phase interface and an application ofthe three-phase interface in water treatment and sterilization.

Description

technical field [0001] The invention relates to the technical field of interface materials. More specifically, it relates to a photocatalytic gas-solid-liquid three-phase interface with adjustable wettability and its preparation method and application. Background technique [0002] Interfacial reactions are the basis of heterogeneous catalysis. To study the interface behavior under photocatalytic conditions is to study the essential properties of photocatalytic reactions, which represents the development direction of this field. [0003] However, in recent years, there are few reports that directly study the influence of wettability-tunable interfacial behavior on photocatalytic performance. The reports that have been reported mainly focus on the interface behavior at a fixed degree of wetting. Among them, Jiang Lei's research group made the anatase TiO 2 supported on a hydrophobic porous carbon substrate treated with PTFE (air / TiO 2 / H 2 O three-phase interface), unde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/72
CPCC02F1/30C02F1/725C02F1/722Y02E60/36
Inventor 张铁锐熊旭阳施润
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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