Formaldehyde is an indoor air pollutant commonly found in construction materials. Too much formaldehyde inhaled by the human body is easy to cause cancer. There are ways to use porous substrates for catalytic oxidation, physical adsorption and chemical reactions, etc. Most of physical adsorption uses expanded porous substrate ratio The surface area is adsorbed by formaldehyde force with van der Waals force, but it is often easy to cause adsorption saturation and desorption during formaldehyde adsorption. To improve this problem, In this study, the surface of the activated carbon was coated with silver and silver oxide by hydrothermal synthesis.
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