Gold nanoparticle/iron-doped tungsten oxide room-temperature formaldehyde removal catalyst as well as preparation method and application thereof

Abstract

The invention provides a gold nanoparticle/iron-doped tungsten oxide room-temperature formaldehyde removal catalyst as well as a preparation method and application thereof. The preparation method specifically comprises the following steps: dispersing small-size gold nanoparticles with a plasmon effect and ferric chloride into a tungsten chloride precursor ethanol solution; and preparing the gold nanoparticle/iron-doped tungsten oxide room-temperature formaldehyde removal catalyst in one step through a high-temperature and high-pressure reaction. The hole concentration and the concentration ofactive sites on the surface of the catalyst are increased by doping transition metal ions, electron and hole separation is improved through the gold nanoparticles with the plasmon effect, the catalytic performance of the gold nanoparticles/iron-doped tungsten oxide on formaldehyde is greatly improved, and meanwhile, the preparation method has the characteristics of being simple, low in cost and the like.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a gold nanoparticle / iron-doped tungsten oxide catalyst for removing formaldehyde at room temperature and a preparation method and application thereof. Background technique [0002] Indoor building materials, decoration materials, decorative materials, cleaning agents, insecticides, disinfectants and other chemical reagents are flooded in all aspects of life, which produces organic substances mainly formaldehyde. Formaldehyde is a colorless, transparent gas with a pungent odor, and has serious harm to the eyes, nose, throat, lungs, liver, and immune system. The toxicity of formaldehyde is higher, has been determined as highly carcinogenic and teratogenic shape substance by the World Health Organization. Therefore, the removal of formaldehyde in indoor or closed environments will be an urgent problem to be solved for a long time in the future. [0003] Indoor fo...

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Problems solved by technology

The physical adsorption method mainly uses porous materials such as activated carbon and diatom mud to physically adsorb formaldehyde molecules, but this method has a low efficiency of removing formaldehyde and is easy to re-release under the influence of external conditions such as humidity and temperature after the adsorption of formaldehyde is saturated; the photocatalyst method has developed rapidly in recent years. A new technology developed that can directly use solar energy for environmental purification uses ultraviolet excitation to degrade organic pollutants adsorbed on the surface of the catalyst into carbon dioxide, but the indoor ultraviolet light intensity is low and the efficacy is very low in the dark environment at night; the oxidation method mainly It uses an active catalyst to directly degrade the formaldehyde molecules adsorbed on the surface

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