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Copper phthalocyanine-cuprous oxide composite gas sensor and preparation method thereof

A cuprous oxide and gas sensor technology, applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of inability to accurately control the film thickness of gas-sensitive materials, inability to obtain trimethylamine detection sensitivity, and low product detection sensitivity. Accurate control of film thickness, fast response and recovery time, good reversibility and repeatability

Inactive Publication Date: 2019-02-26
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this product can be used for the detection of trimethylamine, there are deficiencies with its preparation method. At first, the detection sensitivity of the product is not high, only 8-10ppm; secondly, the working temperature when the product detects trimethylamine gas As high as 150-250°C; Finally, the preparation method can neither accurately control the film thickness of the gas-sensitive material, but also requires high-temperature annealing, and cannot obtain products with higher trimethylamine detection sensitivity

Method used

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  • Copper phthalocyanine-cuprous oxide composite gas sensor and preparation method thereof
  • Copper phthalocyanine-cuprous oxide composite gas sensor and preparation method thereof
  • Copper phthalocyanine-cuprous oxide composite gas sensor and preparation method thereof

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Embodiment 1

[0044] The concrete steps of preparation are:

[0045] In step 1, copper phthalocyanine is first placed in a sulfuric acid solution with a mass fraction of 99% at 30°C and stirred until it is completely dissolved to obtain a copper phthalocyanine sulfuric acid solution. Then, according to the volume ratio of copper phthalocyanine sulfuric acid solution and deionized water of 1:8, the copper phthalocyanine sulfuric acid solution was added into deionized water at 90° C., stirred for 5 hours, and then filtered to obtain a filter cake.

[0046]In step 2, first place the filter cake in 0.08 mol / L acid solution and alkali solution to disperse and then suction filter; wherein, the acid solution is hydrochloric acid solution, and the alkali solution is sodium hydroxide solution to obtain purified copper phthalocyanine. Then, the purified copper phthalocyanine was washed with deionized water until the filtrate was neutral, and then dried at 60° C. to obtain copper phthalocyanine nanoro...

Embodiment 2

[0050] The concrete steps of preparation are:

[0051] In step 1, copper phthalocyanine is first placed in a sulfuric acid solution with a mass fraction of 98% at 40°C and stirred until it is completely dissolved to obtain a copper phthalocyanine sulfuric acid solution. According to the volume ratio of copper phthalocyanine sulfuric acid solution and deionized water of 1:9, the copper phthalocyanine sulfuric acid solution was added to deionized water at 93° C., stirred for 4.5 hours, and then filtered to obtain a filter cake.

[0052] In step 2, first place the filter cake in 0.09 mol / L acid solution and alkali solution to disperse and then suction filter; wherein, the acid solution is hydrochloric acid solution, and the alkali solution is sodium hydroxide solution to obtain purified copper phthalocyanine. Then, the purified copper phthalocyanine was washed with deionized water until the filtrate was neutral, and then dried at 70° C. to obtain copper phthalocyanine nanorods. ...

Embodiment 3

[0056] The concrete steps of preparation are:

[0057] Step 1, first place copper phthalocyanine in a sulfuric acid solution with a mass fraction of 97% at 50° C. and stir until it is completely dissolved to obtain a copper phthalocyanine sulfuric acid solution. According to the volume ratio of copper phthalocyanine sulfuric acid solution and deionized water of 1:10, the copper phthalocyanine sulfuric acid solution was added into deionized water at 95° C., stirred for 4 hours, and then filtered to obtain a filter cake.

[0058] In step 2, first place the filter cake in 0.1 mol / L acid solution and alkali solution to disperse and then suction filter; wherein, the acid solution is hydrochloric acid solution, and the alkali solution is sodium hydroxide solution to obtain purified copper phthalocyanine. Then, the purified copper phthalocyanine was washed with deionized water until the filtrate was neutral, and then dried at 80° C. to obtain copper phthalocyanine nanorods.

[0059]...

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Abstract

The invention discloses a copper phthalocyanine-cuprous oxide composite gas-sensitive component and a preparation method thereof. The gas-sensitive component is prepared by coating a substrate, attached with an electrode, with film-shaped copper phthalocyanine-cuprous oxide, wherein the copper phthalocyanine is bar-shaped and the cuprous oxide is granular. The preparation method comprises the following steps: preparing a copper phthalocyanine sulfuric acid solution, adding the copper phthalocyanine sulfuric acid solution into deionized water, stirring and filtering to obtain filter cakes; putting the filter cakes into acid and alkali solutions, dispersing, performing suction filtration, washing the purified copper phthalocyanine with deionized water and drying to obtain copper phthalocyanine nanorods; mixing the copper phthalocyanine nanorods and cuprous oxide nanoparticles, dispersing the mixture into normal butanol, putting the obtained mixed solution on the surface of the deionized water by an interface self-assembling method to form a copper phthalocyanine-cuprous oxide film; and taking the film by using the substrate attached with the electrode and drying the film on the substrate to prepare a target product. The copper phthalocyanine-cuprous oxide composite gas-sensitive component is widely applied to high-sensitivity detection on trimethylamine gas easily and commercially.

Description

technical field [0001] The invention relates to a gas sensor and a preparation method, in particular to a copper phthalocyanine-cuprous oxide (CuPc-Cu 2 O) Composite gas sensor and preparation method thereof. Background technique [0002] With the continuous deepening of human understanding of sustainable development strategies, environmental pollution and climate change issues have attracted great attention from all over the world. Trimethylamine is one of the main objects of national odor gas pollution control, and it is also the main gas produced during the decomposition of protein in fish. Its content has become an important indicator of the freshness of aquatic products today. Therefore, the research and development of high-sensitivity detection materials for trimethylamine gas has become an important research topic, such as a trimethylamine gas sensor and its preparation method disclosed in Chinese invention patent application CN103063705 A on April 24, 2013. The gas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/00
CPCG01N27/00
Inventor 段国韬刘强周飞高磊
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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