Aerogel and its composites for sensing, adsorption, and photocatalysis

The aerogels are porous with low density structures and have been explored in the range of applications including catalysis, thermal insulators, solar energy uses, piezoelectric, energy conversions-storage, low-temperature glass formation, sensors, adsorption, and photocatalysis. A variety of aerogels with unusual architect have been developed such as organic aerogels, nonsilica oxide aerogels, chalcogenide aerogels, carbon aerogels, and others. In the present chapter, we have tried to compile a brief research associated with the development of aerogels and their composites and used in the various applications of present need of water pollution and its remediation. Additionally, we have discussed the problems with the different examples of aerogels as sensors, adsorbents, and photocatalysts.