Bi/Ti3C2 nanosheet photocatalyst for catalytic reduction of NOx, and preparation method thereof

A photocatalyst and nanosheet technology, applied in the field of photocatalysis, can solve the problems of low removal rate and unstable photocatalytic performance, and achieve the effect of reducing NOx content, long service life and stable performance

Active Publication Date: 2019-04-30
SHAANXI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In order to overcome the existing severe air pollution Bi particles and Ti 3 C 2 Used alone for NO x The problem of low removal rate and unstable photocatalytic performance, the present invention proposes a Bi / Ti3C2 nanosheet photocatalyst for catalytic reduction of NOx, which has stable catalytic performance and high catalytic rate under natural light conditions, especially for NOx Catalytic degradation performance is more prominent

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  • Bi/Ti3C2 nanosheet photocatalyst for catalytic reduction of NOx, and preparation method thereof
  • Bi/Ti3C2 nanosheet photocatalyst for catalytic reduction of NOx, and preparation method thereof
  • Bi/Ti3C2 nanosheet photocatalyst for catalytic reduction of NOx, and preparation method thereof

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Embodiment 1

[0031] This embodiment prepares catalytic reduction NO x Bi / Ti 3 C 2 The method of nanosheet photocatalyst is mainly realized by the following steps:

[0032] (1) 30ml, 50% volume concentration of hydrofluoric acid solution is added to place 3.0g Ti 3 AlC 2 Powder (hydrofluoric acid and Ti 3 AlC 2 The mass ratio of the powder is 5:1) in the polytetrafluoroethylene liner of the hydrothermal kettle, magnetically stirred at 40 °C for 48 hours in the hydrothermal kettle, and the powder after the reaction was extracted by centrifugation, and the upper layer of powder was taken and washed with deionized water until neutral, then washed twice with ethanol, and dried at 80°C for 12 hours to obtain an intermediate product;

[0033] (2) Add the intermediate product into dimethyl sulfoxide solvent, stir magnetically at room temperature for 12 hours; remove the residual liquid by centrifugation, wash three times with deionized water, wash once with absolute ethanol, and dry at 80°C ...

Embodiment 2

[0038] This embodiment prepares catalytic reduction NO x Bi / Ti 3 C 2 The method of nanosheet photocatalyst is mainly realized by the following steps:

[0039] (1) The hydrofluoric acid solution of 60ml, 50% volume concentration is added to put 3.0g Ti 3 AlC 2 Powder (hydrofluoric acid and Ti 3 AlC 2 The mass ratio of the powder is 10:1) in a polytetrafluoroethylene liner of a hydrothermal kettle, magnetically stirred for 40h at a temperature of 50°C in a hydrothermal kettle, and the powder after the reaction is extracted by centrifugation, and the upper layer of powder is taken and washed with deionized water until Neutral, then washed twice with ethanol, dried at 70°C for 15 hours to obtain an intermediate product;

[0040] (2) Add the intermediate product into dimethyl sulfoxide solvent, stir magnetically at room temperature for 10 h; remove the residual liquid by centrifugation, wash three times with deionized water, wash once with absolute ethanol, and dry at 70°C fo...

Embodiment 3

[0043] This embodiment prepares catalytic reduction NO x Bi / Ti 3 C 2 The method of nanosheet photocatalyst is mainly realized by the following steps:

[0044] (1) The hydrofluoric acid solution of 90ml, 50% volume concentration is added to put 3.0g Ti 3 AlC 2 Powder (hydrofluoric acid and Ti 3 AlC 2 The mass ratio of the powder is 15:1) in a polytetrafluoroethylene liner of a hydrothermal kettle, magnetically stirred for 32 hours at a temperature of 60 °C in a hydrothermal kettle, and the powder after the reaction is extracted by centrifugation, and the upper layer powder is taken and washed with deionized water until Neutral, then washed twice with ethanol, dried at 75°C for 10 hours to obtain an intermediate product;

[0045] (2) Add the intermediate product into dimethyl sulfoxide solvent, stir magnetically at room temperature for 15 hours; remove the residual liquid by centrifugation, wash three times with deionized water, wash once with absolute ethanol, and dry at ...

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Abstract

The invention discloses a Bi/Ti3C2 nanosheet photocatalyst for catalytic reduction of NOx, and a preparation method thereof, and belongs to the technical field of photocatalysis. The Bi/Ti3C2 photocatalyst is formed by attaching Bi particles to a Ti3C2 nanosheet structure. The preparation method comprises the following steps: 1) mixing a hydrofluoric acid solution and a Ti3AlC2 powder, and processing the obtained mixture to prepare an intermediate; 2) adding the intermediate to a dimethyl sulfoxide solvent, processing the obtained mixture to obtain a Ti3C2 powder; and 3) mixing the Ti3C2 powder and a Bi(NO3)3.5H2O powder in ionic water, and carrying out subsequent treatment to obtain the Bi/Ti3C2 sample. The Bi/Ti3C2 photocatalyst has a good catalytic effect, has an excellent removal effect on NOx in air, and also can also be applied to NOx-containing exhaust gas treatment devices.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a Bi / Ti 3 C 2 Catalytic reduction of NO by nanosheets x Photocatalytic methods and their applications. Background technique [0002] Nitric oxide is the main cause of acid rain and smog, and one of the gas pollution sources of atmospheric environmental problems, which mainly comes from furnace combustion. Therefore, it is urgent to develop a technology to efficiently and economically solve the pollution problem. [0003] Semiconductor photocatalysis is a promising ppb-level denitrification technology, which has potential application value in solving the world's energy shortage due to its advantages of high efficiency and environmental protection. Bismuth is a typical semi-metal material with a series of unique properties such as extremely small effective mass, large mean free path, long Fermi wavelength, high carrier mobility and small energy band overlap, causing peo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J35/02B01D53/86B01D53/94B01D53/56
CPCB01D53/8628B01D53/9413B01D2258/0283B01J27/22B01J35/004B01J35/023Y02C20/30
Inventor 朱刚强李世平高健智
Owner SHAANXI NORMAL UNIV
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