SiO2 aerogel is a special material that can help save energy in buildings. It is lightweight, insulates well, lets light through, and is fireproof and waterproof. Researchers have studied how to make SiO2 aerogel from different materials and reduce costs. They have also looked at using it for building insulation and coatings. SiO2 aerogel can replace current insulation materials and make buildings more energy-efficient. It has great potential for saving energy in the future.