3D Magnetic Nanocomposite Aerogel (3D-MANCA) for Humidity Sensing and Dye Adsorption Applications

Introducing magnetic properties to aerogels not only opens new application areas but also enhances their performance in various applications. Herein, we report a novel 3D magnetic agar nanocomposite aerogel (3D-MANCA) with outstanding characteristics such as high porosity, magnetic property, rapid swelling behavior, and a unique stimuli-driven electrical conductivity. Agar and nanocellulose mixture were selected as the matrix material, while magnetic Fe3O4 nanoparticles, CuO nanoparticles, and graphene nanopowder were incorporated as functional additives. 3D-MANCA obtained after a uni-directional freeze casting process exhibited a highly-ordered microporosity. It showed excellent magnetic properties and methylene-blue adsorption capability and a great performance as humidity sensor. A novel magnetic nanocomposite aerogel having a highly-ordered microstructure and sturdy nature was fabricated. External stimuli driven electrical conductivity of the aerogel provided excellent performance at humidity sensing. Its magnetic nature and high porosity contributed to its dye absorption capability. A novel magnetic nanocomposite aerogel having a highly-ordered microstructure and sturdy nature was fabricated. External stimuli driven electrical conductivity of the aerogel provided excellent performance at humidity sensing. Its magnetic nature and high porosity contributed to its dye absorption capability.