Gas sensitive element by taking single-walled carbon nanotube/phthalocyanine composite material as ammonia-sensitive material and preparation method thereof

Abstract

The invention discloses a gas sensitive element by taking a single-walled carbon nanotube / phthalocyanine composite material as an ammonia-sensitive material and a preparation method thereof and relates to a gas sensitive element for measuring ammonia concentration and a preparation method thereof. The invention aims to solve the problems that a gas sensitive element by taking a single single-walled carbon nanotube as an ammonia-sensitive material is poor in reversibility and a gas sensitive element by taking metal phthalocyanine as an ammonia-sensitive material is high in resistance value. The gas sensitive element by taking the single-walled carbon nanotube / phthalocyanine composite material as the ammonia-sensitive material consists of an interdigital electrode and a single-walled carbon nanotube / phthalocyanine composite material. The preparation method comprises the following steps: 1. preparing a carboxylated single-walled carbon nanotube; 2. preparing the single-walled carbon nanotube / phthalocyanine composite material; and 3. dispensing to obtain the gas sensitive element by taking the single-walled carbon nanotube / phthalocyanine composite material as the ammonia-sensitive material. The invention can be used for preparing the gas sensitive element by taking the single-walled carbon nanotube / phthalocyanine composite material as the ammonia-sensitive material.

Description

technical field

[0001] The invention relates to a gas sensor for measuring ammonia concentration and a 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. At the same time, the types and quantities of gases used and produced by people in production and life are increasing year by year. The harmful gases in them not only pollute the environment and affect the climate, but also have the danger of explosion, fire and poisoning. As one of the most effective ways to detect harmful gases, gas sensors have attracted extensive attention from business groups and research institutions around the world in recent years. Traditional semiconductor-based metal oxide materials (such as ZnO, SnO 2 and Fe 2 o 3 etc.) sensors have been widely used to detect nitrogen-containing harmful gase...

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