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Ammonia gas sensor based on perovskite quantum dots and ammonia gas quantitative detection method

An ammonia gas sensor, perovskite technology, applied in chemical instruments and methods, nanotechnology for sensing, instruments, etc., can solve the problems of poor selectivity and high working temperature of gas sensors, achieve excellent performance, overcome ultra-high Working temperature, good selectivity

Pending Publication Date: 2021-07-23
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a perovskite quantum dot-based ammonia sensor and ammonia quantitative detection method in order to overcome the defects of high working temperature and poor selectivity of gas sensors in the prior art

Method used

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  • Ammonia gas sensor based on perovskite quantum dots and ammonia gas quantitative detection method
  • Ammonia gas sensor based on perovskite quantum dots and ammonia gas quantitative detection method
  • Ammonia gas sensor based on perovskite quantum dots and ammonia gas quantitative detection method

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Embodiment 1

[0117] (1) First cut the quartz glass into 1cm×1cm with a glass cutting machine, wipe the surface stains with an acetone cotton ball, then place the quartz substrate in isopropanol-acetone-water-acetone-isopropanol for 15 minutes, and then Dry in an oven at 70°C for later use.

[0118] (2) Perovskite quantum dots were synthesized by hot injection method. Will Cs 2 CO 3 (0.814g) was added into a 100mL three-neck flask together with octadecene, ODE (30mL) and oleic acid, OA (2.5mL), dried at 120°C for 1h, and then 2 under heating to 160°C until all Cs 2 CO 3 The cesium oleate solution was reacted with OA, and the cesium oleate solution was kept at 160° C. before injection to avoid solidification. Mix 24.0mL ODE, 10mL OA and PbBr 2 (1.38 g) was charged into a 250 mL flask, evacuated at 120°C for 30 minutes and heated to 180°C under nitrogen flow. Inject 8 mL of cesium oleate solution (0.08 moL in ODE) rapidly. Within 5 s, the reaction mixture was cooled using an ice-water...

Embodiment 2

[0124] (1) First cut the quartz glass into 1cm×1cm with a glass cutting machine, wipe the surface stains with an acetone cotton ball, and then place the quartz substrate in isopropanol-acetone-water-acetone-isopropanol for 15 minutes, and then Dry in an oven at 70°C for later use.

[0125] (2) Perovskite quantum dots were synthesized by hot injection method. Will Cs 2 CO 3 (0.814g) was added into a 100mL three-neck flask together with octadecene, ODE (30mL) and oleic acid, OA (2.5mL), dried at 120°C for 1h, and then 2 under heating to 160°C until all Cs 2 CO 3 The cesium oleate solution was reacted with OA, and the cesium oleate solution was kept at 160° C. before injection to avoid solidification. Mix 24.0mL ODE, 10mL OA and PbBr 2 (1.38 g) was charged into a 250 mL flask, evacuated at 120°C for 30 minutes and heated to 180°C under nitrogen flow. Inject 8 mL of cesium oleate solution (0.08 moL in ODE) rapidly. Within 5 s, the reaction mixture was cooled using an ice-w...

Embodiment 3

[0130] (1) First cut the quartz glass into 1cm×1cm with a glass cutting machine, wipe the surface stains with an acetone cotton ball, and then place the quartz substrate in isopropanol-acetone-water-acetone-isopropanol for 15 minutes, and then Dry in an oven at 70°C for later use.

[0131] (2) Perovskite quantum dots were synthesized by hot injection method. Will Cs 2 CO 3 (0.814g) was added into a 100mL three-neck flask together with octadecene, ODE (30mL) and oleic acid, OA (2.5mL), dried at 120°C for 1h, and then 2 under heating to 160°C until all Cs 2 CO 3 The cesium oleate solution was reacted with OA, and the cesium oleate solution was kept at 160° C. before injection to avoid solidification. Mix 24.0mL ODE, 10mL OA and PbBr 2 (1.38 g) was charged into a 250 mL flask, evacuated at 120°C for 30 minutes and heated to 180°C under nitrogen flow. Inject 8 mL of cesium oleate solution (0.08 moL in ODE) rapidly. Within 5 s, the reaction mixture was cooled using an ice-w...

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Abstract

The invention discloses an ammonia gas sensor based on perovskite quantum dots and an ammonia gas quantitative detection method. A gas sensitive element of the ammonia gas sensor comprises a perovskite quantum dot film, and perovskite quantum dots are perovskite quantum dots with defects on the surfaces. The ammonia gas sensor provided by the invention is simple in structure and can realize dynamic monitoring of the ammonia gas content. According to the ammonia gas detection method disclosed by the invention, accurate measurement of low-concentration ammonia gas can be realized by utilizing the change value of the fluorescence intensity, moreover, the method can realize quantitative detection of the ammonia gas concentration at room temperature without too high working temperature, and the method has the characteristics of simple measurement method, low element cost, high response recovery speed and good detection selectivity, and the detection performance is good.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, and in particular relates to an ammonia gas sensor based on perovskite quantum dots and a quantitative detection method for ammonia gas. Background technique [0002] Ammonia is a colorless gas with a strong pungent odor and is easily soluble in water. Ammonia is a carcinogenic and teratogenic substance that can cause certain damage to the eyes, respiratory system, nervous system and internal organs of the human body. When exposed to the ammonia environment, the skin tissue exposed to ammonia will be corroded and irritated by ammonia, and ammonia will also absorb the moisture on the surface of the skin, causing denaturation of protein on the surface of the skin and destroying the tissue structure. In addition, ammonia gas can also cause strong irritation and corrosion to the eyes and respiratory system. Ammonia gas is easily adsorbed on the conjunctiva and respiratory mucosa, leading to conj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64B82Y40/00B82Y15/00C03C17/22C03C17/00C01G21/00C01G21/16C09K11/66
CPCG01N21/6489G01N21/645B82Y40/00B82Y15/00C03C17/22C03C17/002C01G21/006C01G21/16C09K11/665C03C2217/28C03C2218/116C03C2218/32C01P2004/64C01P2002/34C01P2002/85
Inventor 董庆锋黄卉郝明伟宋益龙
Owner JILIN UNIV
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