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Defective oxygen-enriched zinc oxide-supported heterogeneous metal oxide branch nanostructure, and preparation method and application thereof

A nanostructure, zinc oxide technology, applied in the field of sensing, can solve technical problems and other problems

Active Publication Date: 2021-09-17
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Secondly, the sensitivity of sensitive materials to biomarkers needs to meet the basic requirements of moisture resistance, detection limit, selectivity, stability and sensitivity, but it is still a technical problem and challenge

Method used

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  • Defective oxygen-enriched zinc oxide-supported heterogeneous metal oxide branch nanostructure, and preparation method and application thereof
  • Defective oxygen-enriched zinc oxide-supported heterogeneous metal oxide branch nanostructure, and preparation method and application thereof
  • Defective oxygen-enriched zinc oxide-supported heterogeneous metal oxide branch nanostructure, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of zinc-cobalt precursors by hydrothermal method

[0026] Add 0.01M CTAB and 2.4M NaOH into water and mix and stir to obtain solution A, then add 0.4MZn(NO 3 ) 2 ·6H 2 O and 0.05M cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H2 O) The mixed solution was added dropwise to solution A and stirred for 1 hour to obtain solution B, and then solution B was transferred to a reaction kettle, and placed in an oven at 95° C. for 10 hours to obtain precursor C.

[0027] (2) Calcination of zinc-cobalt precursor

[0028] The zinc-cobalt precursor C was calcined in a muffle furnace at 300°C, the heating rate was 2°C / min, and the calcination time was 12 hours.

Embodiment 2

[0030] (1) Preparation of Zn-Cu precursor by hydrothermal method

[0031] Add 0.02M CTAB and 2M NaOH into water and mix and stir to obtain solution A, then add 0.4M Zn(NO 3 ) 2 ·6H 2 O and 0.1M copper nitrate trihydrate (Cu(NO 3 ) 2 ·3H 2 O) The mixed solution was added dropwise to solution A and stirred for 1 hour to obtain solution B, and then solution B was transferred to a reaction kettle, and placed in an oven at 150° C. for 24 hours to obtain precursor C.

[0032] (2) Calcined zinc-copper precursor

[0033] The zinc-copper precursor C was calcined in a muffle furnace at 500°C, the heating rate was 2°C / min, and the calcination time was 3 hours.

Embodiment 3

[0035] (1) Preparation of Zn-Cr precursor by hydrothermal method

[0036] Add 0.01M CTAB and 2M NaOH into water and mix and stir to obtain solution A, then add 0.4M Zn(NO 3 ) 2 ·6H 2 O and 0.2M chromium nitrate nonahydrate (Cr(NO 3 ) 3 9H 2 O) The mixed solution was added dropwise to solution A and stirred for 2 hours to obtain solution B, and then solution B was transferred to a reaction kettle, and placed in an oven at 160° C. for 12 hours to obtain precursor C.

[0037] (2) Calcined zinc chromium precursor

[0038] The zinc-chromium precursor C was calcined in a muffle furnace at 500°C, the heating rate was 2°C / min, and the calcination time was 2 hours.

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Abstract

The invention relates to a defective oxygen-enriched zinc oxide-supported heterogeneous metal oxide branch nanostructure, and a preparation method and application thereof. According to the invention, an optimized hydrothermal technology is adopted to prepare a zinc oxide / metal hydroxide precursor, and a subsequent high-temperature calcination oxidation technology is adopted to prepare the zinc oxide-supported heterogeneous metal oxide branched nanostructure. An n-p heterojunction constructed by zinc oxide and heterogeneous metal oxide exists in the branched nanostructure, and enrichment of defective oxygen is beneficial to increase of the interface potential barrier of a material. The branched nanostructure provides a large specific surface area, accelerates an electron transmission rate, and provides a new method for enhancing sensitivity. The zinc oxide-supported heterogeneous metal oxide branched nanostructure has potential application prospects in the fields of gas sensing, electrochemical sensing and biosensing.

Description

technical field [0001] The invention relates to a zinc oxide-supported heterogeneous metal oxide branched nanostructure, a preparation method and an application thereof. The invention is a function-oriented design and modification technology of functional nanomaterials. Firstly, a zinc oxide / metal hydroxide precursor is synthesized by a hydrothermal method, and then a zinc oxide-loaded dissimilar metal enriched in oxygen deficiency is prepared by a high-temperature calcination oxidation process. Oxide branched nanostructures. The invention discloses a zinc oxide-supported heterogeneous metal oxide branch nanostructure, a preparation method and an application thereof, which are enriched in defective oxygen, and belong to the field of sensing technology. Background technique [0002] In recent years, in the development process of the Internet of Things, sensors have played an increasingly important role as the basic unit. In particular, the sensor can accurately detect trace...

Claims

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Application Information

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IPC IPC(8): C01G9/02C01G51/04C01G3/02C01G37/033
CPCC01G9/02C01G51/04C01G3/02C01G37/033C01P2004/03C01P2004/04C01P2002/72C01P2004/62Y02P20/52
Inventor 杨大驰王晨
Owner NANKAI UNIV
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