Acetone gas detector based on charge transfer and detection method thereof

Abstract

The invention discloses an acetone gas detector based on charge transfer and a detection method thereof, wherein the detector comprises a gas input channel, a response cavity, ultraviolet diodes, a MoTe2 sensitive layer, micro metal electrodes, gold wires, a display screen, a current sampling chip and a gas output channel. The MoTe2 sensitive layer generates electron hole pairs under the excitation of the ultraviolet diodes; when the organic gas acetone adsorbs, the electron hole pairs are separated, and a large amount of electrons are transferred to acetone molecules, causing the current to rise sharply; and when other organic gases adsorb, only a small amount of electron holes are transferred to the organic gas molecules, so that the resulting change in the current can be substantially negligible. According to the acetone gas detector based on charge transfer and the detection method thereof, the specific detection of acetone in the mixed organic gas is achieved with the high sensitivity and specific selection for acetone.

Description

technical field [0001] The invention belongs to the field of detection methods, in particular to an acetone gas detector based on charge transfer and a detection method thereof. Background technique [0002] Acetone gas is a biological detection molecule in the exhaled breath of patients with lung cancer, diabetes, and chronic liver disease. The qualitative and quantitative detection of acetone in the exhaled breath of the human body has important application value in medical diagnosis. At present, the human exhaled breath detection instruments in clinical use all adopt gas chromatography (GC), which adopts the analysis method of separation first and detection, which has high sensitivity, good selectivity, high efficiency, high qualitative and quantitative accuracy, but due to the detection method There are disadvantages such as expensive, bulky and difficult to carry, which limit its application prospect. As an improvement, a portable organic gas detector based on photoion...

AI Technical Summary

Problems solved by technology

At present, the human exhaled breath detection instruments in clinical use all adopt gas chromatography (GC), which adopts the analysis method of separation first and detection, which has high sensitivity, good selectivity, high efficiency, high qualitative and quantitative accuracy, but due to the detection method There are disadvantages of expensive, bulky and difficult to carry, which limit its application prospect

As an improvement, a portable organic gas detector based on photoion ionization (PID) detection has appeared, which has the characteristics of portability and high sensitivity, but its detection limit is difficult to reach the ppm level of human exhaled gas, and it cannot detect specific organic gases. It is difficult to apply to human exhaled breath detection and prevention of clinical diseases

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