A noble metal in-situ co-doped cuo-based no 2 Preparation and Application of Gas Sensitive Materials

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

Active Publication Date: 2021-05-14
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • A noble metal in-situ co-doped cuo-based no <sub>2</sub> Preparation and Application of Gas Sensitive Materials
  • A noble metal in-situ co-doped cuo-based no <sub>2</sub> Preparation and Application of Gas Sensitive Materials
  • A noble metal in-situ co-doped cuo-based no <sub>2</sub> Preparation and Application of Gas Sensitive Materials

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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 present invention is a noble metal in-situ co-doped CuO-based NO 2 The preparation and application of gas-sensitive materials relate to the field of preparation of CuO-based nanomaterials. The preparation method of noble metal in situ co-doped CuO nanomaterials comprises the following steps: respectively adding 1.3 mmol of CuSO to deionized water 4 5H 2 O and 0.8-1 mmol of trisodium citrate, after stirring, add 5-5.3 mmol of NaOH to obtain solution A; mix 375-1875 μL of chloroauric acid solution with a concentration of 0.017 mol / L and 650-3250 μL of a concentration of 0.01 mol / L The palladium chloride solution was mixed to obtain solution B; solution B was added to solution A, and the reaction product was obtained by hydrothermal reaction at 160°C for 12 hours; cooling, washing, drying and heat treatment. The material prepared by the above method can be used to prepare NO 2 gas sensor.

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 Patents(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 LIAONING
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