Method for synthesizing perovskite LaCoO3 composite oxide material from bagasse

A technology of composite oxide and bagasse, applied in chemical instruments and methods, cobalt oxide/cobalt hydroxide, other chemical processes, etc., can solve the problems of high cost and complicated preparation process, and achieve the effect of low cost and simple process

Active Publication Date: 2015-07-01
XIAMEN UNIV
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Problems solved by technology

These methods are complex and costly

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  • Method for synthesizing perovskite LaCoO3 composite oxide material from bagasse
  • Method for synthesizing perovskite LaCoO3 composite oxide material from bagasse

Examples

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Effect test

Embodiment 1

[0014] LaCoO 3 Preparation: The molar ratio of lanthanum nitrate: cobalt nitrate is 1:1. Take 0.04mol metal nitrate and dissolve in 0.1L deionized water, add relative to LaCoO 3 The mass percentage is 10% of 60 mesh bagasse. Stir evenly, dry at 80°C for 24 hours, and heat to burn in an electric furnace. The obtained precursor powder is further decomposed after roasting at 400°C for 2 hours, and then roasted at 800°C for 4 hours to obtain the nano perovskite material LaCoO 3 .

[0015] The specific surface area test was carried out on a Micromeritics TriStar 3000 automatic physical and chemical adsorption instrument. Using high-purity nitrogen as the adsorbate, the adsorption is carried out at liquid nitrogen temperature (77K). Weigh about 0.1 g of the sample, press it into tablets, and vacuumize the sample at 150°C for 5 hours before testing. The specific surface area is 6.97m 2 / g.

Embodiment 2

[0017] LaCoO 3 Preparation: The molar ratio of lanthanum nitrate: cobalt nitrate is 1:1. Take 0.04mol metal nitrate and dissolve in 0.1L deionized water, add relative to LaCoO 3 The mass percentage is 15% of 80 mesh bagasse. Stir evenly, dry at 100°C for 12 hours, and heat to burn in an electric furnace. The obtained precursor powder is further decomposed after roasting at 400°C for 2 hours, and then roasted at 700°C for 4 hours to obtain the nano-perovskite material LaCoO 3 , whose specific surface area is 6.72m 2 / g.

Embodiment 3

[0019] LaCoO 3 Preparation: The molar ratio of lanthanum nitrate: cobalt nitrate is 1:1. Take 0.04mol metal nitrate and dissolve in 0.1L deionized water, add relative to LaCoO 3 The mass percentage is 10% bagasse of 100 mesh. Stir evenly, dry at 90°C for 16 hours, and heat to burn in an electric furnace. The obtained precursor powder is further decomposed after roasting at 400°C for 2 hours, and then roasted at 600°C for 4 hours to obtain the nano-perovskite material LaCoO 3 , its specific surface area is 11.72m 2 / g.

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Abstract

The invention provides a method for synthesizing a perovskite LaCoO3 composite oxide material from bagasse and relates to the perovskite type composite oxide material. The method comprises the following steps: (1) dissolving lanthanum nitrate and cobalt nitrate into water to form a mixed solution, adding with bagasse, and drying to obtain xerogel; and (2) igniting xerogel obtained in the step (1) to obtain black precursor powder, pre-decomposing black precursor powder in a muffle furnace, and calcining, so as to obtain the perovskite LaCoO3 composite oxide material. The perovskite-structured LaCoO3 composite oxide material is prepared by directly complexing and burning bagasse with metal salt, so that the process is simple, and the cost is low; the method is a novel method for preparing perovskite type nano materials from renewable biomasses.

Description

technical field [0001] The invention relates to a perovskite type composite oxide material, in particular to a bagasse synthetic perovskite LaCoO 3 Methods for composite oxide materials. Background technique [0002] As a renewable resource, biomass has become more and more important in green chemical synthesis. In recent years, biomass has also shown unique advantages in green synthesis of nanomaterials. Biomass extracted from plants and microorganisms is rich in active functional groups that can undergo reduction with metal ions. Nano-silver, nano-gold, and core-shell nanomaterials have been successfully synthesized. Zheng Nan et al. synthesized porous alumina using biomass gardenia (ZL201110399340.2). Recently, it has been reported to use rice straw to prepare silica hybrid materials (Bioresource Technology 101 (2010) 8402–8405). Perovskite composite oxide LaCoO 3 With excellent magnetoelectric properties, it is widely used in related fields such as fuel cells, senso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06C01G51/04
Inventor 贾立山罗明萍凌枫潘欣伟
Owner XIAMEN UNIV
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