Abstract
Over the last decade, the assortment of metal, metal-oxide materials fabricated using several chemical and physical techniques have increased significantly. This chapter presents a notable explanation of the progressive development of the solid materials known as aerogels. Metal, metal-oxides aerogels can have unusual properties, such as, high surface area, low density, low thermal conductivity, and good optical translucency. This combination of properties makes aerogels attractive materials for use in applications ranging from lightweight structural, insulating or shock absorbing materials especially in aeronautics, microelectronics, sensing applications, and purification systems. These aerogels materials have been fabricated using extensive variability of techniques, such as, incorporation of metal nanoparticles or carbon-based substituents into the sol-gel matrix and surface modification of the matrix following gelation. This chapter presents brief introduction, basic properties, and fabrication process of metal, metal oxides aerogels, and further various techniques for the purification systems has been discussed.
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