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Composite metal oxide with hollow urchin-like structure, and preparation method and application thereof

A composite metal, sea urchin-like technology, applied in the direction of nickel oxide/nickel hydroxide, hybrid capacitor electrodes, material resistance, etc., can solve the problems of not meeting the accuracy requirements of hydrogen sulfide, insufficient sensitivity, high working temperature, etc., and achieve contact resistance Value and specific capacitance value performance improvement, good repeatability, and low product cost

Active Publication Date: 2018-05-01
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there are still many problems to be solved in common semiconductor gas sensors and electrochemical sensors based on metal oxides, such as insufficient sensitivity, poor selectivity, high operating temperature and high power consumption, etc., which often cannot be achieved. Accuracy requirements for hydrogen sulfide detection

Method used

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  • Composite metal oxide with hollow urchin-like structure, and preparation method and application thereof
  • Composite metal oxide with hollow urchin-like structure, and preparation method and application thereof
  • Composite metal oxide with hollow urchin-like structure, and preparation method and application thereof

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[0028] A method for preparing a composite metal oxide with a hollow sea urchin-like structure provided by an embodiment of the present invention includes: uniformly mixing a metal element-containing compound and a reducing agent in a solvent, The reaction under the condition of ~200°C does not exceed 50h, and then the obtained product is annealed under the condition of 0°C-450°C to obtain the composite metal oxide having a hollow sea urchin-like structure.

[0029] In some preferred embodiments, the preparation method includes: mixing the metal element-containing compound and the reducing agent in a solvent, and making the formed mixed reaction liquid under pressure of 1-30Pa (preferably 5-20Pa, especially Preferably 10~15Pa), the temperature is 25~200 ℃ (preferably 120~180 ℃, especially preferably 150~170 ℃) under the conditions of continuous reaction 1~10h (preferably 2~8h, especially preferably 3~5h ), and annealed at 100-450°C (preferably 200-420°C, especially preferably 3...

Embodiment 1

[0082] Example 1 The preparation process of the composite metal oxide having a hollow sea urchin-like structure in this example includes:

[0083]Pour nickel chloride with a molar ratio of 6:4 (concentration of 1M nickel chloride solution, 1.35ml in total) and cobalt chloride into a beaker filled with 75mL of deionized water. Stir on a magnetic stirrer. After dissolving, add 3g of urea and continue to stir for 1h to mix evenly. Then pour the mixed solution into a 150ml hot water reactor and react at 180°C for 4 hours. After cooling down to room temperature naturally, add water / ethanol repeatedly washed several times and centrifuged, the product was placed in a tubular heating furnace and annealed at 400° C. for 3 hours to obtain a composite metal oxide with a hollow sea urchin-like structure.

[0084] see Figure 1a-Figure 1c It is the SEM image of the composite metal oxide with a hollow sea urchin-like structure prepared in this example. And the specific surface area and c...

Embodiment 2

[0093] Embodiment 2: the nickel chloride (concentration is the nickel chloride solution of 1M, totally 1.35ml) and the manganese chloride that the molar ratio is 6:4 are poured in the beaker that 75mL deionized water is housed, in the beaker that has heating function Stir on a magnetic stirrer at (30°C), add 3g of urea after dissolving and continue to stir for 1h to mix evenly, then pour the mixed solution into a 150ml hot water reactor and react at 180°C for 4 hours, then cool down to room temperature naturally After that, it was repeatedly washed with water / ethanol and centrifuged, and the product was placed in a tubular heating furnace and annealed at 400°C for 3 hours to obtain a composite metal oxide with a hollow sea urchin-like structure.

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Abstract

The invention discloses a composite metal oxide with a hollow urchin-like structure, and a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing a compound containing a metal element with a reducing agent in a solvent, then carrying out a reaction at a pressure of 1 to 30 Pa and a temperature of 0 to 200 DEG C for no more than 50 h, andannealing a product of the reaction at 0 to 450 DEG C so as to form the composite metal oxide with the hollow urchin-like structure. The composite metal oxide with the hollow urchin-like structure hasgood morphology and particle size uniformity, large specific surface area and excellent heat stability; and the preparation method is simple in process, convenient to operate, low in product cost, good in controllability, free of environmental pollution, good in repeatability and easy for large-scale industrial production. A flexible supercapacitor, a hydrogen sulfide gas sensor and other devicesprepared from the composite metal oxide with the hollow urchin-like structure are substantially improved in working performance.

Description

technical field [0001] The present invention specifically relates to a composite metal oxide with a hollow sea urchin-like structure, its preparation method and application, for example, its application in the preparation of flexible supercapacitors and hydrogen sulfide gas sensors. Background technique [0002] Designing and controlling the synthesis of micro-nano materials with special morphology is the driving force for the continuous development of the current material science field and human society. Among them, composite metal oxide materials with hollow structures have low density, large specific surface area, and surface permeability. Good advantages, through the control of the types of components, the shape, size and structure of the material, the design and optimization of the material structure and performance can be realized at the micro-nano scale, which has become a research hotspot in the field of new materials. , has broad application prospects in many fields...

Claims

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Application Information

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IPC IPC(8): C01G1/02C01G53/04H01G11/46G01N27/04
CPCC01G1/02C01G53/04C01P2002/85C01P2004/03C01P2004/30C01P2004/61C01P2004/62C01P2004/82C01P2006/12G01N27/04H01G11/46Y02E60/13
Inventor 李铁张珽罗袆丁海燕
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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