▎ 摘　　要

NOVELTY - Composite photo-catalyst comprising graphene-lead sulfide/titanium dioxide nanocomposite material that is deposited on an outer surface of a titanium dioxide nanotube array, and an opening connecting an inner surface with an outer surface of the nanotube array, is new. USE - The composite photo-catalyst is useful for treating waste water containing multi-constituent organic pollutant (all claimed) using solar energy UV visible light. ADVANTAGE - The photo-catalyst has excellent wastewater treating performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing a photo-catalyst.