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Preparation and application of a noble metal in-situ co-doped CuO-based NO2 gas-sensitive material

A technology of co-doping and noble metals, which is applied in the field of preparation of CuO-based nanomaterials, can solve the problems of poor gas-sensing performance, achieve the effects of improving sensitivity, good development prospects, and reducing operating temperature

Active Publication Date: 2019-04-16
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the current CuO nanomaterials to NO 2 In order to solve the problems of relatively poor gas-sensing performance, the present invention provides a noble metal in-situ co-doped CuO-based NO 2 The preparation and application of gas-sensing materials, the purpose is to modify CuO nanorods through the mode of in-situ co-doping of noble metals, so as to prepare a new type of NO with excellent gas-sensing performance and suitable for low working temperature detection 2 gas sensor

Method used

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  • Preparation and application of a noble metal in-situ co-doped CuO-based NO2 gas-sensitive material
  • Preparation and application of a noble metal in-situ co-doped CuO-based NO2 gas-sensitive material
  • Preparation and application of a noble metal in-situ co-doped CuO-based NO2 gas-sensitive material

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Embodiment 1

[0042] In embodiment 1, 375 μ L concentration is the chloroauric acid solution of 0.017 mol / L and 650 μ L concentration is the palladium chloride solution of 0.01 mol / L, and Au atomic mole number is 0.6375*10 -2 mmol, Pd atomic mole number 0.65*10 -2 mmol, the atomic molar number of Cu is 1.3mmol, so the atomic molar number Au / Pd is about 1:1, and the atomic molar ratio of (Au+Pd) / Cu is 1%.

Embodiment 2

[0043] In embodiment 2, 750 μ L concentration is the chloroauric acid solution of 0.017 mol / L and 1300 μ L concentration is the palladium chloride solution of 0.01 mol / L, and Au atomic mole number is 1.275*10 -2 mmol, Pd atomic mole number 1.3*10 -2 mmol, Cu atomic molarity is 1.3mmol, so atomic molarity Au / Pd is about 1:1, (Au+Pd) / Cu atomic molar ratio is 2%.

Embodiment 3

[0044] In embodiment 3, 1875 μ L concentration is the chloroauric acid solution of 0.017 mol / L and 3250 μ L concentration is the palladium chloride solution of 0.01 mol / L, and Au atomic mole number is 3.1875*10 -2 mmol, Pd atomic mole number 3.25*10 -2 mmol, Cu atomic molarity is 1.3mmol, so atomic molarity Au / Pd is about 1:1, (Au+Pd) / Cu atomic molar ratio is 5%.

[0045] Example 1

[0046] The invention discloses a noble metal in-situ co-doped CuO-based NO 2 The preparation of gas-sensitive material comprises the steps:

[0047] ①Add 1.3mmol CuSO to 30mL deionized water 4 ·5H 2 O and 0.8mmol of trisodium citrate powder, after stirring for 15min, add 5mmol of NaOH powder into the solution, and continue stirring for 0.5h to obtain solution A;

[0048] ② Mix 375 μL of chloroauric acid solution with a concentration of 0.017 mol / L and 650 μL of a palladium chloride solution with a concentration of 0.01 mol / L. The doping atomic mole is 1% of the Cu atomic mole, add deionized ...

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Abstract

The invention discloses the preparation and the application of a noble metal in-situ co-doped CuO-based NO2 gas-sensitive material and relates to the CuO-based nanometer material preparation field. The preparation method of the noble metal in-situ co-doped CuO nanometer material comprises the following steps of adding the 1.3 mmol of CuSO45H2O and the 0.8-1 mmol of trisodium citrate in deionized water, and adding the 5-5.3 mmol of NaOH after stirring to obtain a solution A; mixing the 375-1875 muL of a chloroauric acid solution with the concentration of 0.017 mol / L and the 650-3250 muL of a palladium chloride solution with the concentration of 0.01 mol / L to obtain a solution B; adding the solution B in the solution A, carrying out hydrothermal reaction at 160 DEG C for 12 h to obtain a reaction product; and cooling, washing, drying and carrying out heat treatment. The material prepared through the above method can be used to make an NO2 gas sensor which has excellent gas sensitivity performance and is suitable for low operating temperature detection.

Description

technical field [0001] The invention relates to the preparation of CuO-based nanomaterials, in particular to a noble metal in-situ co-doped CuO-based NO 2 Preparation and application of gas-sensitive materials. Background technique [0002] Nitrogen dioxide (NO 2 ) is a reddish-brown gas with a pungent smell, easily soluble in water, and partially produces nitric acid and nitric oxide. NO as one of nitrogen oxides 2 , is an intermediate product of industrial synthesis of nitric acid, mainly derived from blasting operations in mining, combustion of industrial fuels, urban vehicle exhaust, and the production process of nitric acid and nitrogen-containing fertilizers. Each year there are about several million tons of NO 2 Discharged into the atmosphere, it is a major air pollutant and the main factor in the formation of acid rain and photochemical smog. NO 2 After being inhaled into the human body, it is highly irritating and corrosive to the lung tissue, and is likely to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 沈岩柏周鹏飞钟祥熙陈享享高淑玲魏德洲张云海魏可峰
Owner NORTHEASTERN UNIV
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