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One-dimensional single crystal LaFeO3 nanorods and preparation thereof

A nanorod and single crystal technology, applied in the field of hydrothermal synthesis, to achieve the effects of controllable specific surface area, cheap raw materials, and simple preparation process

Inactive Publication Date: 2014-01-08
BEIJING UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0004] So far, no literature and patents have reported the successful synthesis of Fe 2 o 3 Preparation of one-dimensional single crystal LaFeO as a template 3 Nano stave

Method used

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  • One-dimensional single crystal LaFeO3 nanorods and preparation thereof
  • One-dimensional single crystal LaFeO3 nanorods and preparation thereof

Examples

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Embodiment 1

[0015] Example 1: Template Fe 2 o 3 The preparation of nanorods, that is, under stirring conditions, 2.02g Fe(NO 3 ) 3 9H 2 O and 1.2g NaOH were dissolved in 10ml deionized water respectively, and then the NaOH solution was added dropwise to the Fe(NO 3 ) 3 In the solution, a brown-yellow precipitate appeared, and then stirred for 30 minutes. The above solution was transferred to a 50ml stainless steel autoclave lined with polytetrafluoroethylene (the volume filling degree was 80%), and placed in a constant temperature box for treatment at 200 ° C. 12h, let it cool down to room temperature naturally after taking it out. Filter the product obtained after the treatment, wash with deionized water and absolute ethanol three times each, dry at 100°C for 12h, raise it to 350°C at a rate of 1°C / min in a muffle furnace and keep the temperature at 350°C for 4h , get Fe 2 o 3 Nano stave.

[0016] One-dimensional single crystal LaFeO 3 Preparation of nanorods: under stirring co...

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Abstract

The invention relates to one-dimensional single crystal LaFeO3 nanorods and preparation thereof, belonging to the technical field of LaFeO3 nanocrystals. The preparation method comprises the following steps: preparing Fe2O3 nanorods by a hydrothermal synthesis process, dissolving lanthanum nitrate hexahydrate in deionized water, adding the Fe2O3 nanorods under stirring conditions to obtain a template, dropwisely adding a 10% KOH solution under stirring conditions until the pH value of the solution is 10 or so, carrying out ultrasonic treatment for 10-15 minutes, transferring into a teflon-lined autogenous pressure kettle until the volume degree of filling is 80%, carrying out constant-temperature treatment at 180 DEG C for 12 hours, carrying out vacuum filtration,, washing with deionized water three times, washing with anhydrous ethanol three times, drying at 80 DEG C for 12 hours, heating from room temperature to 650-750 DEG C in a muffle furnace in an air atmosphere at the rate of 1 DEG C / minute, and keeping the temperature for 4 hours to obtain the one-dimensional single crystal LaFeO3 nanorods. The raw materials are cheap and accessible; the preparation process is simple; and the product shape is controllable.

Description

technical field [0001] The invention relates to the preparation of a one-dimensional single-crystal perovskite oxide nanomaterial, in particular to Fe 2 o 3 Preparation of one-dimensional single crystal LaFeO as a template 3 Hydrothermal synthesis of nanorods belonging to LaFeO 3 field of nanocrystal technology. Background technique [0002] The development of modern industry has brought pollution to the environment while improving our life. Industrial waste gas (volatile organic compounds VOCs, etc.) is the main source of air pollution. Among the VOCs pollution control technologies, catalytic combustion is currently the most commonly used removal technology. With the help of catalysis, VOCs can be burned at lower temperatures (<500°C), and the removal rate is usually higher than 95%. In catalytic combustion, the choice of catalyst is particularly critical. At present, the types of catalysts used in the catalytic combustion of VOCs mainly include supported noble met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B7/10C30B29/24C30B29/62B82Y40/00B82Y30/00
Inventor 戴洪兴韩文邓积光谢少华杨黄根姜洋谭伟敖爱孙何胜男
Owner BEIJING UNIV OF TECH
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