Defect-containing sandwich type perovskite catalyst as well as preparation method and application thereof

A catalyst and sandwich technology, which is applied in catalyst activation/preparation, chemical instruments and methods, chemical elements of heterogeneous catalysts, etc., can solve the problems of few researches on reaction selectivity and quantum efficiency, etc. Simple and feasible effect

Active Publication Date: 2021-12-17
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Even for visible-light active catalysts, there are few studies on their reaction selectivity and quantum efficiency.

Method used

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  • Defect-containing sandwich type perovskite catalyst as well as preparation method and application thereof
  • Defect-containing sandwich type perovskite catalyst as well as preparation method and application thereof
  • Defect-containing sandwich type perovskite catalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0084] a. Accurately weighed 0.01mmol strontium chloride (SrCl 2 ·6H 2 O), 0.02mmol bismuth nitrate (Bi(NO 3 ) 2 ·5H 2 O), 0.02mmol niobium oxide (Nb 2 o 5 ) into an agate mortar and grind in the same direction for about 90 minutes, then dissolve it in an aqueous solution containing 3.0 mL of nitric acid and stir it magnetically for about 180 minutes;

[0085] b. Slowly add 3.0 mL of glyoxal into the solution obtained in step a while continuing to stir, and continue stirring for about 30 minutes. Transfer the obtained homogeneous solution to the autoclave and place it in the oven at 5°C min -1 The heating rate was increased to 200 ° C for 36 hours; finally, it was naturally cooled to room temperature, and the samples were washed, dried, and ground to obtain the defect-containing target product "sandwich" type perovskite catalyst strontium bismuth niobate SrBi 2 Nb 2 o 9 .

[0086] Wherein, the prepared catalyst is a defect-containing catalyst with visible light respo...

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Abstract

The invention provides a defect-containing sandwich type perovskite catalyst as well as a preparation method and application thereof. The catalyst has the following advantages that surface defects are constructed only by adjusting the addition amount of glyoxal in a one-step simple and feasible hydrothermal reaction; oxygen vacancies affect the optical property of the material, can enhance the absorption of visible light, and can be changed into active reaction sites to further promote the photocatalytic NO removal efficiency; and secondary pollution is easy to control, and the catalyst has a good application prospect in the field of environmental treatment. A hydrothermal method is utilized to prepare the defect-containing sandwich type perovskite catalyst with a nanosheet structure, and the surface defects are constructed by utilizing a reducing reagent such as glyoxal and accurately regulating and controlling the addition amount of the reducing reagent. Due to the adoption of liquid phase synthesis, the method is feasible, relatively simple in synthesis process, simple and convenient to operate, relatively low in energy consumption compared with high-temperature hydrogen / inert gas calcination, easy to control, low in cost and suitable for large-scale preparation.

Description

technical field [0001] The invention belongs to the technical field of environmental nanomaterial photocatalysis, and in particular relates to a defect-containing "sandwich" type perovskite catalyst and its preparation method and application. Background technique [0002] Nitrogen oxides (NO x ) is one of the main air pollutants, which can cause acid rain, photochemical smog, PM 2.5 and climate change, seriously affecting the living environment of human beings, NO x pollution has become a serious global problem. The monitoring results in 2012 showed that 254 of the 388 cities in my country were seriously polluted, with an air exceeding standard rate of 75.1%, NO x , SO 2 The concentration is increasing day by day. Explore and elucidate NO x The origin and process of pollutants such as pollutants appear to be very important, while the effective removal of NO x , and converting it into non-toxic nitrogen and other means to reduce its harm is a huge challenge in the fiel...

Claims

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Application Information

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IPC IPC(8): B01J23/20B01J37/10B01J37/16B82Y30/00B82Y40/00B01D53/86B01D53/56
CPCB01J23/20B01J23/002B01J37/10B01J37/16B82Y30/00B82Y40/00B01D53/8628B01J2523/00B01D2257/404B01D2255/802B01J35/39B01J2523/24B01J2523/54B01J2523/56
Inventor 赵进才热沙来提·海里里盛桦陈春城籍宏伟马万红章宇超车延科宋文静
Owner INST OF CHEM CHINESE ACAD OF SCI
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