▎ 摘　　要

NOVELTY - Composite aerogel comprises titanium dioxide and reduced graphene oxide. The content of the titanium dioxide is 14.3-76.9 wt.%. USE - The composite aerogel is useful for adsorption and photocatalytic treatment of oil containing wastewater (all claimed). ADVANTAGE - The composite aerogel can be simply prepared with high specific surface area in an economical manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing composite aerogel comprising carrying out hydrothermal reaction of titanium dioxide and reduced graphene oxide.