Graphene/molybdenum disulfide compounding-based gas sensitive material and preparation method thereof

Abstract

The invention discloses a graphene / molybdenum disulfide compounding-based gas sensitive material and a preparation method thereof, relates to a gas sensitive material and a preparation method thereof, and aims at solving the technical problem that intrinsic graphene gas sensor nanoparticles only have high sensitivity for a few gases. The outer surface of graphene is coated by molybdenum disulfide. The preparation method comprises the following steps: I, cooling concentrated sulfuric acid, adding natural flake graphite and potassium permanganate, stirring, adding a mixed solution formed by hydrogen peroxide and distilled water, centrifuging and cleaning, and dissolving a precipitate in deionized water to obtain a solution; and II, dissolving sodium molybdate, cysteine and sodium hexadecyl benzene sulfonate in distilled water, adding the solution obtained in the step I, placing in a reaction kettle, and carrying out centrifugal cleaning and freeze drying to obtain the graphene / molybdenum disulfide compounding-based gas sensitive material. The composite material is high in selectivity and sensibility. The graphene / molybdenum disulfide compounding-based gas sensitive material and the preparation method thereof belong to the field of preparation of gas sensitive materials.

Description

technical field [0001] The invention relates to a gas-sensitive material and a preparation method thereof. Background technique [0002] With the continuous improvement of people's quality of life requirements, people are increasingly concerned about environmental pollution, especially air pollution that poses a threat to human survival. Among them, NO 2 Gas is one of the pollutants in the atmosphere that are very harmful to the environment and human health, especially in recent years NO 2 The main source of gas——vehicle exhaust is growing at an astonishing rate every year, making NO 2 The monitoring of the environment has become particularly important, so timely and accurate knowledge of the NO in the environment and related pollution sources 2 The concentration of gas is of great significance to environmental monitoring and environmental protection. [0003] Although traditional semiconductor gas sensors are widely used, their high operating temperature (greater than 3...

AI Technical Summary

Problems solved by technology

However, current studies have found that intrinsic graphene gas sensor nanoparticles have poor solubility, only have high sensitivity to a few gases, and often need to be desorbed by heating, which limits the wide application of this type of gas sensor to a certain extent.

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