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Method for preparing perovskite oxide nano material by using microwave method

A technology of perovskite oxides and nanomaterials, applied in chemical instruments and methods, tin compounds, inorganic chemistry, etc., can solve the problems of high sintering temperature, large grain size, particle agglomeration, etc., and achieve good crystallinity and thermal energy. The effect of high utilization and high phase purity

Active Publication Date: 2022-04-29
INST OF EARTH ENVIRONMENT CHINESE ACAD OF SCI
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Problems solved by technology

Currently commonly used BaSnO 3 The synthesis methods of nanomaterials mainly include high-temperature solid-phase method and hydrothermal method. The high-temperature solid-phase method has the phenomenon of excessive grain size due to high sintering temperature and long time, while the hydrothermal method also faces the problem of long time-consuming and serious particle agglomeration.

Method used

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  • Method for preparing perovskite oxide nano material by using microwave method
  • Method for preparing perovskite oxide nano material by using microwave method
  • Method for preparing perovskite oxide nano material by using microwave method

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Embodiment 1

[0035] A method for preparing perovskite oxides for carbon dioxide reduction catalytic reaction by microwave method, comprising the following steps:

[0036] (1) Add 9mL of deionized water into the beaker, start to stir, add 1mmol of barium nitrate (x=0.01), 0mmol of lanthanum nitrate, and 1mmol of tin chloride pentahydrate in sequence, and stir for 10min until completely dissolve;

[0037] (2) Prepare 2mol / L sodium hydroxide solution, add 12mL of the prepared sodium hydroxide solution dropwise to the solution in step (1), and continue stirring for 30min;

[0038] (3) Transfer the solution obtained in step (2) to a microwave reaction tube, adjust the infrared reaction temperature to 170° C., and the reaction time to 60 minutes;

[0039] (4) Wash the precipitate obtained in step (3) with water for 4 to 5 times in a high-speed centrifuge until neutral, and adjust the centrifuge speed to 9800r / min for 3 minutes.

[0040] (5) Place the water-washed precipitate obtained in step (...

Embodiment 2

[0046] The difference from the embodiment is that x=0.01, and other processes are the same as the embodiment 1.

Embodiment 3

[0048] The difference from the embodiment is that x=0.02, and other processes are the same as the embodiment 1.

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Abstract

The invention relates to a method for preparing a perovskite oxide nano material by using a microwave method, which comprises the following steps of: adding barium nitrate, lanthanum nitrate and tin chloride pentahydrate into water according to a stoichiometric ratio in a chemical formula LaxBa (1-x) SnO3 to obtain a clear solution; wherein 0 < = x < = 0.04; dropwise adding a sodium hydroxide solution into the clear solution to obtain a mixed solution; heating the mixed solution to obtain a precipitate; and calcining the precipitate to obtain the perovskite oxide nano material. According to the invention, the doped perovskite oxide LaxBa (1-x) SnO3 for the reduction catalytic reaction of carbon dioxide is prepared by using a microwave method. Under the condition that expensive complexing agents such as citric acid and ionic liquid are not added, the impurity-phase-free and uniformly dispersed doped perovskite oxide nano material is prepared only under the alkaline condition.

Description

technical field [0001] The invention belongs to the field of preparation of electrocatalytic nanometer materials, and more specifically relates to a method for preparing perovskite oxide nanomaterials by utilizing a microwave method. Background technique [0002] Over the past few centuries, rapid industrial development and population growth have led to excessive consumption of fossil fuels, exacerbating the global energy crisis. At the same time, large amounts of CO emitted by fossil fuel combustion 2 The continuous accumulation in the atmosphere has brought about an important environmental problem of global warming and seriously threatened the sustainable development of the global society. In order to deal with this problem, a series of global deployment, research and development and application of climate change technologies are needed, including renewable energy technology and carbon capture, utilization and storage technology (CCUS). Among them, CCUS technology can ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/00C25B11/077C25B11/091
CPCC01G19/006C01G19/00C25B11/0773C25B11/091C01P2004/62C01P2004/61C01P2004/10C01P2002/34Y02P20/133
Inventor 张倩严悦珲黄宇曹军骥
Owner INST OF EARTH ENVIRONMENT CHINESE ACAD OF SCI
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